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Engineering Manual - LG HVAC VRF Systems

1. General Data on page 14 Product Data PRODUCT FEATURES AND BENEFITS MULTI N System Controls Refrigerant Distribution Balancing Buildings with hydronic heating systems can experience low delta T syndrome a condition that occurs when the water distribution system is not properly balanced Units located at the ends of the hot water piping system need boiler water while units located closer to the boiler use too much water Low delta T syndrome also occurs in VRF systems To prevent this condition in Multi V installations LG provides control algorithms that automatically monitor and balance the dis tribution of refrigerant to indoor units during high demand periods This allows each unit to receive an appropriate amount of refrigerant Low Noise Levels LG customers often ask if the outdoor unit is running after commissioning is complete When Multi V outdoor units operate fully loaded they have one of the quietest noise levels in the industry Noise is almost undetectable during off peak operation To promote a quiet comfortable environment the LG Multi V indoor units operate at sound levels as low as 23dB A and outdoor units as low as 50dB A at full load All rotating components are soft started by the controller using digitally controlled inverters which reduces undesirable noise caused by fans and compressors cycling on and off Comfort Control at Its Best Tight temperature control through precise load mat
2. MULTI Y PIPING DESIGN GUIDE Figure 43 Coiled Expansion Loops and Offsets o A A a Large Tubing U Bend gt 3 4 in b Loop c Small Tubing U Bend lt 3 4 in Table 26 Radii of Coiled Expansion Loops and Developed Lengths of Expansion Offsets Anticipated Linear Nominal Tube Size OD inches See 1 14 1 1 2 RI e E Sooo e o a a a a 2 1 2 3 1 2 MOS W Me tw wo e o R Centerline Minimum Radius inches L Centerline Length of Pipe The Engineers Toolbox www engineeringtoolbox com Expansion of Carbon Copper and Stainless Steel Pipe Due to our policy of continuous product innovation some specifications may change without notification SYSTEM ENGINEERING 69 TWNNVI ONIYSANIDNG LINN 9NISNIANO9 did 1VIH SA 4 FAREMA system Engineering PIPING DESIGN GUIDE Refrigerant Pipe Connections A Note When routing field provided tubing inside the out door unit case take care to avoid vibration damage to the tubing Mount the tubing so it does not make contact with the compressor unit casing terminal cover or mounting bolts Allow room for field installation Properly insulate field provided tubing inside the confines of the unit casing Refer to Figure 44 for unit pipe connection options and Table 27 for outdoor unit connection types Figure 44 Outdoor Unit Refrigerant Pipe Connections Options ASMA A F ie P A Pa e e e al e e A a A e e a o 70
3. lole LO TA e S e ee 1 212 4 eee 125 e SA Sr ee ee MEL A A ES e 22 362 o o o q q T N N N N N N m oD oe on m 99 lt lt 00 co ss N N O N e0 lt o e N oo o e N ee wr o co N 00 wt o S pi a S co N o A al E a a E ne ms oa Q o S gt S S pu S S S y N EN ej me EN al S S pe v lojo io jalo lA le te oOo e lst Iinio e ola a e oOo l ix El lojo o Nn e O O o o l o jo o jo o ljo o j o a eNi ON ON TEN TEN TEN TN N ISO OA N co lt o co N st N st O o N st co co o N st de 00 S N st co ee o N a oO wT LO 00 N ae Y mo Oo o a N Y io LO o o o o o S o o o o N N N N N N N N 99 LO o LO o LO o LO o LO o o o o o o o o o o o o o o o o o o o lt o o o o o o o o o o N N N N N N Ti Din vo o 2 NO Io loo N IN O Y NN O O0O Ol SsS coyNy S 0O A eee Noe ee ee ee le Wee lice eee e ls ls Se rd Re ee ee ee fe ee olo lt Puu a uPuJ ua s s O Pipe Length 12 16 18 0 F Pipe length baseline temperature Pipe length in feet The Engineers Toolbox www engineeringtoolbox com Expansion of Carbon Copper and Stainless Steel Pipe Due to our policy of continuous product innovation some specifications may change without notification SYSTEM ENGINEERING 68
4. 2m wo 20 xo 20 ss 2m me om 20 20 mo im mo 12 Rated with an equivalent piping length of 24 6 ft and no change in elevation between the Heating mode stable operation is ensured when the outdoor ambient wet bulb temperature is between 4 F and 60 F indoor and outdoor unit Power Input Pl in kW and includes compressor s and outdoor fan motor s MBh Net Capacity R410A 60 Hz 32 PERFORMANCE DATA Due to our policy of continuous product innovation some specifications may change without notification MULTI V PERFORMANCE DATA Heating Capacity 3 0 Ton Table 10c ARUNO36GS2 Heat Pump Nominal Heating Capacity Outdoor Air Indoor Unit Entering Air Dry Bulb Temperature F 6 4 67 70 us 76 MBh PI MBh PI MBh PI MBh PI MBh PI MBh Combination Ratio Bh PI n us 3 s w T DB MEM ao 150 MEM ME EE OM E EZE KM 00 50 MOM MEM za 100 o 200 MEN EA E KM EZE EZE 500 0 600 EA Eea 100 150 MEM ME EE EM EE EZE KM 00 MO MO Capacity rated using ISO 5151 Test Rating Standard for Non Ducted Heat Pumps Rated with an equivalent piping length of 24 6 ft and no change in elevation between the Heating mode stable operation is ensured when the outdoor ambient wet bulb temperature is between 4 F and 60 F indoor and outdoor unit Power Input PI in kW and includes compressor s and outdoor fan motor s MBh Net
5. Capacity rated using ISO 5151 Test Rating Standard for Non Ducted Heat Pumps 1 1 1 1 110 1 1 23 25 30 35 40 45 50 99 65 70 75 85 95 00 05 110 115 23 20 30 35 40 45 50 99 65 70 tho 85 95 00 05 110 115 23 25 30 35 40 45 50 99 65 70 KS 85 95 00 05 110 115 MULTI Y Indoor Unit Entering Air Wet Bulb Temperature F 62 2 62 2 62 2 62 2 62 2 62 2 62 2 62 2 62 2 62 2 62 2 62 2 61 0 599 58 1 57 6 56 4 029 49 4 48 9 57 7 NET 57 7 U 57 7 al 57 7 DU 57 7 57 7 57 1 Ial 57 7 Del 57 1 56 5 55 4 50 8 46 8 46 3 52 7 52m 92 1 52m 52 7 521 52 7 S52 52 7 Oey 52 7 oval 52 7 32 1 52 7 oat 52 7 48 8 44 8 44 3 3 26 329 3 32 3 35 3 41 3 44 3 51 3 58 3 74 4 02 4 35 4 80 5 05 Sl 5 75 5 98 6 22 6 75 7 00 7 06 2 94 29r 3 00 3103 3 09 SZ 3 20 32 3 41 S 4 01 4 25 4 58 Sil 5 71 5 94 6 18 6 53 6 95 7 01 2 68 20 2 74 2an 2 83 2 86 2 89 2 96 3 08 S16 3 39 3 74 4 02 4 66 5 01 5 38 5 77 6 31 7 32 se Uy gt MBh Pl MBh Pl MBh PI 738 738 738 738 oO OD 73 8 3 44 3 47 3 50 3 93 3 59 3 62 3 69 om2 4 19 4 43 4 66 4 96 5 20 5 69 5 93 6 18 6 42 7 78 8 50 8 58 3 54 SS 3 60 3 63 3 69 3m2 3 78 SM9 4 16 4 40 4 81 4 93 5 17 5 64 5 88 6 13 6 36 UNS 8 45 8 53 3 63 3 66 3 69 giz 3 78 3 81 3 88 3 89 4 14 4 37 4 60 4 89 5 13 5 60 5 83 6 0
6. s total cooling block load and the system s CR is above 130 indoor units are oversized In applications where all indoor units are right sized and there is no building diversity the system s CR will range from 50 to 100 If the CR falls below 50 select a smaller outdoor unit or consider adding more or larger indoor unit s to the system If the CR is 50 SYSTEM ENGINEERING Due to our policy of continuous product innovation some specifications may change without notification MULTI NM above 130 review the indoor unit choices and downsize indoor units or select a larger outdoor unit Consider moving indoor units to another Multi V Mini Flex Multi or an LG Duct Free Split system if the outdoor unit size cannot be increased If the CR is under 50 because additional indoor units will be added to the system at a later date add additional indoor units now until the CR rises above 50 or downsize or reduce the number of outdoor unit chassis being run until the future indoor units are con nected to the pipe system Determine the Running Indoor Unit Ratio RUR The RUR is the sum of the nominal capacity of all indoor unit s that are calling for cooling or heating at the same time divided by the nominal capacity of the outdoor unit multiplied by 100 A Note At any time if the RUR is less than 10 op erational anomalies such as excessive compressor and indoor unit fan cycling low suction or high vapor lin
7. tion of flow will change Creating an Expansion Joint When creating an expansion joint the joint height should be a minimum of two times the joint width Although different types of expansion arrangements are available the data for correctly sizing an expansion loop is provided Table 26 Use soft copper with long radius bends on longer runs Figure 43a and Figure 43b or long radius elbows for shorter pipe segments Figure 43c Use the an ticipated linear expansion LE distance calculated and look up the Loop or U bend minimum design dimensions If you choose other types of expansion joints design per ASTM B 88 Standards SYSTEM ENGINEERING 67 TWNNVI ONIYSANIDNS LINN ONISNSGNOD did 1VIH SA 4 IDEAS MULTI NM PIPING DESIGN GUIDE Table 25 Linear Thermal Expansion of Copper Tubing in Inches Solo lo lo o oa o le fe Ad feet PN eo e iov se 1 Co lt 2 2 8 28 8 82 3 3 2 8 8 3 8 13 isl sis sl slsale 9 38 38 8 33 8 sl te ee Aea a Woe Wi es rl e oe a AN A a la o i gt I NINI Q s 0O LO 0O N oo jogo jo ix A lt O O N oo io o IANA O LO Soy 1 1 2 3 4 5 6 rl 8 9 1 3 5 T 9 0 2 4 6 8 0 2 4 6 8 9 1 3 5 7 Fluid Temperature F 80 908 18 27 36 45 54 63 72 81 990 08 26 44 62 80 98 16 34 52 70 88 06 24 42 60 78 96 14 32 50 7 oo ig Io o IN Q lia lalelo lolis ilz lio e asal lale lolo
8. 206 dor 20 o as in ss 24 o 2m nr 3m os am vs am ur sm Capacity rated using ISO 5151 Test Rating Standard for Non Ducted Heat Pumps Rated with an equivalent piping length of 24 6 ft and no change in elevation between the Cooling mode stable operation is ensured when the outdoor ambient dry bulb temperature is between 23 F and 115 F indoor and outdoor unit Rapid cooling operation is stable at indoor temperatures up to 80 F DB MBh Net Capacity Power Input PI in kW and includes compressor s and outdoor fan motor s R410A 60 Hz 22 PERFORMANCE DATA Due to our policy of continuous product innovation some specifications may change without notification MULTI V PERFORMANCE DATA Cooling Capacity 3 0 Ton Table 7b ARUNO36GS2 Heat Pump Nominal Cooling Capacity Outdoor Air e Indoor Unit Entering Air Wet Bulb Temperature F Ratio O MBh PI MBh Pi MBh PI MBh PIi MBh PI MBh PI MBh E 582098 o a E o se tet es PCT ass a e ar o o 52 to 36 135 344 156 382 177 428 198 455 213 481 23 100 o i 06 165 ma 187 2m 2s om u3 20 54 206 e 2 157 36 205 344 24 382 28 me 322 420 32 428 32 e ar ow as TI E ar aa tes ee IO CI aa w 2r on rs w 198 ma 187 s 178 os 1e 64 2 a EE 309 14 344 160 385 178 409 19 444 2238 w a im
9. 4 F to 118 F When the system is started the connected indoor units are automatically assigned an electronic ad MULTI V dress by the outdoor unit s microprocessor Additionally each indoor unit is capable of accepting a manual assignment of a secondary electronic address that if used provides unit tag identification when inte grating with LG VNet control devices While operating in the Heating mode the outdoor unit has a demand based defrost control algorithm and a refrigeration system pump down cycle designed to store up to 6 6 Ibs of the system refrigerant charge in the out door unit In Heating mode a cooperative control algorithm automatically balances in real time the distribution of refrigerant to the indoor units when the system s refriger ant mass flow is insufficient to satisfy the demand of all indoor units when the system is called on to operate outside the system design parameters In 10 second intervals the outdoor unit microprocessor will record the last three minutes of system run time data in non volatile memory Upon unit malfunction or a power outage that results in a system shutdown the stored system operational data may be retrieved and analyzed to assist in diagnosing a system malfunction The outdoor unit micropro cessor is provided with a three digit LED display that communicates active system information and or malfunction codes The microprocessor has an algorithm that actively v
10. 567 39 578 39 588 388 599 401 ao no s pa an 25 s s1 s s2 as s2 as sra as tos 39 3 4s 50 478 52 494 558 504 581 520 59 531 6o no 368 396 436 512 447 54 462 6o 473 619 5o4 642 515 656 oO 37 182 459 227 521 263 58 300 609 318 614 319 624 32 12 E 86 459 232 51 275 68 32 58 385 609 337 619 339 o a 37 23 459 2 521 353 557 390 567 304 578 3 588 399 oo ar s os ste eet s1 aa s2 s s2 450 se2 as o a4 165 0 2 478 238 532 2m 57 3 603 317 63 319 11 344 tos 420 259 ae 310 532 367 557 39 567 393 577 39 C o u ou w on ns se 92 im s2 ss sr s s2 45 Capacity rated using ISO 5151 Test Rating Standard for Non Ducted Heat Pumps Rated with an equivalent piping length of 24 6 ft and no change in elevation between the Cooling mode stable operation is ensured when the outdoor ambient dry bulb temperature is between 23 F and 115 F indoor and outdoor unit Rapid cooling operation is stable at indoor temperatures up to 80 F DB MBh Net Capacity Power Input PI in kW and includes compressor s and outdoor fan motor s R410A 60 Hz Due to our policy of continuous product innovation some specifications may change without notification PERFORMA
11. 60 Hz Due to our policy of continuous product innovation some specifications may change without notification PERFORMANCE DATA 39 Performance Data UNIT REFRIGERANT FLOW DIAGRAMS MULTI Y Cooling Cycle Diagram Figure 7 Cooling Cycle Flow Diagram ARUN 036 047 053 T1 Space Temperature Sensor T2 IDU Refrigerant Entering Temperature Sensor airflow T3 IDU Refrigerant Leaving I I I I bea Temperature Sensor l i CO pp l T4 Outdoor Ambient TE 4 Temperature Sensor Ee i E l i oa T5 Coil Pipe Temperature YV E l i E Sensor 1 l sa l T6 Suction Temperature i Sensor 19 m E Indoor Unit A Ely gt l l T7 Compressor Discharge l Temperature Sensor da gt T8 Pipe Temperature Sensor T9 Sub Cooler Outlet Temperature Sensor T10 Sub Cooler Inlet Temperature Sensor P1 Low Pressure Sensor High Pressure Cutout l l l P2 i X P3 High Pressure Sensor l High Temp High l l Pressure Vapor l y l Ez l a ae High Temp High l no Pressure Liquid Charging Charging Vil I Port Port er re Low Temp Low i Pressure Vapor l l X l Xo Solenoid Hot Gas Valve l EA O PR L l A A RR l Solenoid Bypass Valve r X l l l DA Service Valve QDD Oi Flow Regulator Separator E Field Piping Connection 4 Way Valve y ME Inverter Comp Accumulator q Electronic Expansion Valve EEV Temperatur
12. 69 om wo 7m wo 7m wo oo ws om wo om a7 om 07 oo 07 om a7 100 aa om 9 oor wo o oom oo 000 ser mw sz or on wo om ao 002 ms am 019 002 w o coo on ms sor oom so o7 sm mo aor 009 am 000 oo wo am Taso aio ors sos cor se ww sm or aor mo ao wa a ms am oo sor Too aso ora soo or om oe aw a7 am wo on os om os om 09 aa o ae oe sm woe sre we sm oe som oa om oe om oo om m7 oe roo oo a7 se or so a7 am er sm wa om wo 00 wo 597 uo sw wo so or am so an 000 am 09 am wo om os 000 wo am es ao Combination Ratio Performance Data Capacity rated using ISO 5151 Test Rating Standard for Non Ducted Heat Pumps Rated with an equivalent piping length of 24 6 ft and no change in elevation between the Heating mode stable operation is ensured when the outdoor ambient wet bulb temperature is between 4 F and 60 F indoor and outdoor unit Power Input PI in kW and includes compressor s and outdoor fan motor s MBh Net Capacity R410A 60 Hz 38 PERFORMANCE DATA Due to our policy of continuous product innovation some specifications may change without notification MULTI V PERFORMANCE DATA Heating Capacity 4 4 Ton Table 12c ARUN053GS2 Heat Pump Nominal Heating Capacit
13. Benefits of the Multi V Mini e Maximum individual occupant control e Longest refrigerant piping lengths e Highest elevation differences e Maximum flexibility e Quiet and comfortable environment e Reduced or eliminated ductwork 8 INTRODUCTION Multi V Mini Multi V Mini is among the industry s best with vertical rise and piping lengths so choosing the LG Multi V Mini variable refrigerant flow system provides the sys tem designer with the most freedom and flexibility while engineering the refrigerant pipe system Multi V Mini is a two pipe heat pump system available in nominal capacities of 3 0 4 0 and 4 4 tons lt is best suited for applications with zones that require heating or cooling such as residences and small office buildings The Multi V Mini allows the designer to accommodate up to 9 thermal zones each controlled from a separate control ler Mini outdoor units are available in 208 230V 60Hz 1Ph Adaptable and Flexible Multi V outdoor units can be adapted to a wide range of building types and sizes such as schools hotels hospitals offices and residences The light weight and small footprint allows the system compo nents to be placed in the building without expensive cranes easily fitting into most service elevators and set in place with minimal requirements for structural rein forcements The system s modular design means Multi V can be commissioned in stages so tenants can move in a
14. Due to our policy of continuous product innovation some specifications may change without notification SF MULTI V MINI REFRIGERANT CHARGE Refrigerant Charge ARUN 036 047 053 Table 29 System Refrigerant Charge Calculator Ibs Job Name System Tag or ID Project Manager Date Taai bs a O O A A O wee OO A A tinartetarz mig SSS Wat on ancooiWinor Tawi SEO Wa ones AtCooiNinor BRO RSS IM EXTOT IS a ON A O MEMENTO T ECTS ey Sal sete ta LR Lo ey Sal sete a a a COMITE CA TT A A A ey arg sete ta LN Los COMET TT AA A COMITE A A A a ag ara ate SKIN COMIC A AA COMICO A A A AMC ATT A A A COMIC A AE A COMET TT AA A A COMITE ATT A O 2 ear ta No A COMITE A A A 2 ener ander a E a S a a E COMETE OT A 2 Commenti Sure Nown Cslngal ww vw ae C ETT S A A COMO TA A A w wwo o A A E CO w wwo O A A A O a wms AO A A O S A sms cn etry ge ARNO 087 058 68 Sater hag Tel of im and Factory Cargo bs Maximum quantity of indoor units allowed If trim charge is negative remove refrigerant If trim charge is positive add refrigerant ARUN 036 6 me A PES ES DO md D ARUN 047 8 ARUN 053 9 l l P P Due to our policy of continuous product innovation some specifications may change without notification SYSTEM ENGINEERING 77 TVNNVW 9NIYIINI9NI LINN SNISNSGNOD dNNd 1VIH SA 4 FERA CUT SHEETS Dimensional Data and Weights on page 80 Pipe and Electric
15. Flex multi duct free split systems PTACs and room air conditioners In 2011 the air conditioning and energy solutions business unit grew to include LED lighting and solar products For more information visit www Ig vrf com and www lg dfs com Quality Commitment LG is committed to the success of every Multi V project by provid ing the best industry technical support during project engineering installation and commissioning LG offers a variety of classes de signed for engineers architects installers and servicers to ensure that every Multi V installation is completed successfully Classes are conducted at LG s training centers and in field locations at various times throughout the year and upon special request Go to our website for class schedules prices and registration infor mation Life s Good Variable Refrigerant Flow VRF Technology In the early 1980s VRF technology was introduced to the world as an alternative method of cooling and heating in commercial structures and is designed to minimize energy consumption VRF systems have become the system of choice for designers internationally because these systems offer better comfort at lower operating costs when compared to traditional boiler chiller VAV air handler systems Older systems are being replaced with newer more efficient systems making VRF a viable option Today VRF is gaining popularity in the United States LG Multi V Mini air sourced systems offe
16. Maximum Capacity Btu h 130 ARUN036GS2 38 000 ARUN047GS2 48 000 ARUN053GS2 53 000 1 50 Minimum Combination Ratio 2 130 Maximum Combination Ratio Table 15 Outdoor Unit Cooling Capacity Correction Factor Indoor Units above Outdoor Unit Elevation Differences ft OO N 2s oo gt ELF Equivalent Pipe Length in Feet Sum of the actual pipe length plus allocations for pressure drop through elbows valves and other fittings in equivalent length Table 16 Outdoor Unit Cooling Capacity Correction Factor Outdoor Unit above Indoor Units Elevation Differences ft 2 33 6 98 1 ae Tae a A A A E ee es es ess ost os oe f oso f osa o o A e e ee om om 0 0 ELF Equivalent Pipe Length in Feet Sum of the actual pipe length plus allocations for pressure drop through elbows valves and other fittings in equivalent length Table 16 Outdoor Unit Frost Accumulation Factor Heating At 85 outdoor air relative humidity The frost accumulation factor does not account for effects of show accumulation restricting airflow through the outdoor unit coil Table 18 Altitude Correction Factor waco mo ow om om or om om om om om om on om DiyCol 1w os os os om os ow os os os om os om Due to our policy of continuous product innovation some specifications may change without notification SYSTEM ENGINEERING 93
17. some specifications may change without notification PRODUCT DATA 13 Product Data GENERAL DATA MULTI Y Outdoor Units Table 1a General Data Outdoor Units 3 0 Ton 4 0 Ton 4 4 Ton ARUN036GS2 ARUN047GS2 ARUN053GS82 Cooling Mode Performance Heating Mode Performance Heating Capacty Buh at 47 F 5 00 Heating Capacty Blu at 17 F 36 000 Operating Range Compressor Oil Type PVE FVC68D PVE FVC68D Unit Data Refrigerant Control Location EEV Indoor Unit 1 1 Maximum Number Outdoor Units System E Maximum Number Indoor Units System BB Minimum Number Indoor Units System a ae Qty Refrigeration Circuits 1 Sound Pressure Cooling Heating dB A 52 54 Net Unit Weight Ibs 234 234 234 Shipping Weight Ibs 258 258 258 Communication Cable Qty Wires Gauge 2 18 2 18 2 18 Motor Drive Brushless Digitally Controlled Direct Maximum External Static Pressure in wg 0 16 Airflow Direction Horizontal Back to Front O o Fan 1 The System Combination Ratio must be are net with a Combination Ratio between conditions of 95 F dry bulb DB and 75 F wet Outdoor Unit on page 48 between 50 130 See page 50 for more 95 105 bulb WB Sound pressure levels are tested in an anechoic information Certified under the AHRI Unitary Small Heat Nominal Heating capacity rating obtained with chamber under ISO Standard 1996 2 All communication cable must comply with Pump equipment certification program and tested air entering th
18. 278 1a o 17 sa 199 ass 20 wo 25 uo 204 w 27 137 275 177 309 210 344 247 385 28 409 314 49 323 w m oo m oa 278 108 os 118 x 1 s ia s4 159 e o one a oe E e tar a tat a s oa 5 22 082 244 098 275 114 306 12 342 144 364 154 394 17n o o 202 os 244 1 275 12 306 137 342 153 34 164 394 182 o m ow m 140 275 128 me 143 saz 16 179 soa 208 o go 202 og 24 123 275 145 306 168 342 19 364 212 394 240 o 2 18 244 151 275 178 306 208 342 241 364 263 394 300 Capacity rated using ISO 5151 Test Rating Standard for Non Ducted Heat Pumps Rated with an equivalent piping length of 24 6 ft and no change in elevation between the Cooling mode stable operation is ensured when the outdoor ambient dry bulb temperature is between 23 F and 115 F indoor and outdoor unit Rapid cooling operation is stable at indoor temperatures up to 80 F DB MBh Net Capacity Power Input PI in kW and includes compressor s and outdoor fan motor s R410A 60 Hz Due to our policy of continuous product innovation some specifications may change without notification PERFORMANCE DATA 2 w IVANVIA ONIMSSNIDNA LINN SNISNSGNOD dNNd 1VWIH SA SA FDA PERFORMANCE DATA MULTI V Cooling Capacity 3 0 Ton Table 7c ARUNO36GS2 Heat Pump No
19. A on the indoor units may be tagged 3 A or 5 A Connect outdoor unit terminal IDU B to in door unit terminal B Terminal B on the indoor units may be tagged 3 B or 5 B Maximum allowed length of indoor unit com munication cable is 984 feet A Note 1 Communications cable shield is grounded at ODU only 2 Maintain polarity throughout the communication network Figure 60 Communications Wiring Terminals 14 12V Power source for selected controllers 2 GND Ground 3 DRY2 Fan Only Cool Heat Selector Switch or customer sup plied system shutdown switch See Controls section starting on page 85 for more information TVANVIA 9NIYIINI9NI LINN SNISNSGNOD dNNd 1VIH SA 4 FAREA 4 DRY1 Central Control and Build ing Automation System Communication Buss Connection Connect LG Central Controller and or BMS gateway products 5 InternetA 6 Internet B e me r Indoor Unit s Communication Buss Con nection See Figure 61 a y v O N 8 IDU B i 5 os 1 SODU A da Me T Not used with Multi V Mini LE 7 l l l 10 SODU B a Due to our policy of continuous product innovation some specifications may change without notification SYSTEM ENGINEERING 795 system Engineering MINI REFRIGERANT CHARGE General MULTI V MINI Consider refrigerant safety in all designs Refer to ASHRAE Standards Summary on p
20. Annealed temper ACR copper tubing is available in sizes 1 4 thru 1 1 8 inches ASTM B 280 clean dry and capped Table 23 ACR Copper Tubing Material ye StengitlLeratis ck system Engineering All dimensions provided are in accordance with ASTM B280 The type of tubing selected for use in a particular application is determined by the internal fluid pressure Design pressure 551 psig of the R410A refrigerant at the highest operating condition Annealed soft and drawn temper tubing is suitable for use with flared and brazed fittings Source The Copper Tube Handbook 2010 Copper Development Association Inc 260 Madison Annealed tubing is available in 50 ft coils Avenue New York NY 10016 66 SYSTEM ENGINEERING Due to our policy of continuous product innovation some specifications may change without notification MULTI NM Copper Expansion and Contraction Under normal operating conditions the vapor pipe temperature of a Multi V Mini system can vary as much as 280 F With this large vari ance in pipe temperature combined with a potential straight run pipe of up to 492 ft and a segment length between fittings of up to 131 ft the designer must consider pipe expansion and contraction to avoid potential pipe and fitting fatigue failures Refrigerant pipe along with the insulation jacket form a cohesive unit that expands and contracts together During system operation thermal heat transfer occurs between the pipe and the
21. Follow these steps to calculate the potential refrigerant concentration level f 5 Measure the occupied space dimensions in feet 2 Calculate the cubic foot volume of air in the smallest occupied space 2 4 Ifthe calculation indicates that the potential refrigerant concentration level is higher than the allowed RCL increase the cubic volume of the Divide the refrigerant charge of the Multi V system serving the area in Ibs by the results of step 2 smallest occupied space or modify the piping system design The allowable RCL limit for most applications must be equal to or less than 0 025 Ibs ft However in special occupied spaces such as hospitals and nursing homes where occupants may have limited mobility the allowable RCL limit is cut in half See ASHRAE Standard 34 2007 and local code for detailed information System refrigerant charge Ibs RCL Ibs ft l Volume of smallest occupied space ft To determine the volume of an occupied space the designer must determine which spaces are connected not connected or ventilated Refer to Standard 34 2007 for help If if 2 the calculated RCL is above the allowable limit there are two primary methods used to lower the RCL Increase the volume of the occupied space Decrease the size of the refrigerant charge Per Standard 34 2007 acceptable methods used to increase the volume of an occupied space include Install transfer ducts between rooms
22. Hi 1 gt To UN Segment Cooling Cap 7 5 MBh i 1 la E z ar 4 nT Nees igi ARNUO73B1G2 ARNUO73SEL2 5 mes Rumour Recessed Ceiling High Wall Linear Distance 14 feet Low Static Disch Equivalent Length 14 4 feet ai ee eae Surface Mount ARNUO73R2 al j 5 Cooling 7 5 MBh Cooling 7 5 MBh Recessed Ceiling segment Cooling Cap 7 5 MB Heating 8 5 MBh Heating 8 5 MBh 4 Way Cassette Cooling 7 5 MBh Heating 8 5 MBh Multi V Mini ARUN047GS2 Cooling 47 8 MBh Heating 54 6 MBh h ARNUO73CEA2 Combination Ratio 125 ARNUO73CEA2 Cased Floor Mount Cased Floor Mount 4 Way Cassette 4 Way Cassette Cooling 7 5 MBh Cooling 7 5 MBh Heating 8 5 MBh Heating 8 5 MBh Table 22 Pipe Segment Sizes Segment Tag M1 B1 1 B2 1 B2 2 B23 B2 4 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 Liquid Line Dia OD in 3 8 3 8 3 8 3 8 3 8 1 4 14 11 1 4 1 4 14 14 14 14 1 4 1 4 Vapor Line Dia OD in 3 4 5 8 5 8 5 8 5 8 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 All sizes are internal diameter in inches M Main pipe segment B Branch pipe segment R Run out pipe segment 62 SYSTEM ENGINEERING Due to our policy of continuous product innovation some specifications may change without notification PIPING DESIGN GUIDE LG Engineered Y Branch and Header Kits MULTI Y MINI General The Y Branch and Header kits are used to join one pipe segment to two or more segments See Cut
23. Mirror panel comes standard smoke gray Silver and o Unit option ture humidity and volume limitations apply 5 Only with heat recovery system blue panels are optional Refer to Multi V Catalog 20 PRODUCT DATA Due to our policy of continuous product innovation some specifications may change without notification PERFORMANCE DATA Performance Data on page 22 Unit Refrigerant Flow Diagrams on page 40 Outdoor Wiring Diagram on page 42 PERFORMANCE DATA MULTI V Cooling Capacity 3 0 Ton Table 7a ARUNO36GS2 Heat Pump Nominal Cooling Capacity Outdoor Indoor Unit Entering Air Wet Bulb Temperature F Combinati T Air Temp 5 a a or 0 73 76 F DB MBh PI MBh PI MBh PI MBh PI MBh PI MBh PI MBh P 60 327 1 395 182 4409 2n 483 23 495 233 500 234 512 23 30 wo or m s 21 u u s3 266 a2 200 no 29 no 293 O 327 225 395 30 420 323 432 326 s1 328 49 331 458 334 O O o e 31 13 367 16 468 192 462 218 486 232 491 233 499 234 12 0 T D wo 1 r ou ns 288 us 205 ass 267 2 200 no 201 QO o o n sr 208 a2 oa l 5 a ass aa a1 oa us ast ors 1 336 150 380 173 425 197 469 223 482 231 490 233 gt 0 O o zs im ase iw o 2s os 207 us 205 ass
24. Sheets Y Branch Kits on page 82 and Header Kits on page 83 for sizes and dimensions Y Branch Kits A Note Only LG supplied Y Branch and Header fittings can be used to join one pipe segment to two or more segments LG Y Branch and Header kits are precision engineered devices designed to evenly divide the flow of refrigerant Third party or field fabricated Tee s Y fittings Head ers or other branch fittings are not qualified for use with LG Multi V systems The only field provided fittings allowed in a Multi V piping system are 45 and 90 elbows and full port ball valves There is no limitation on the number of Y Branches that can be installed but there is a limita tion on the number of indoor units connected to a single outdoor unit See Table 1a on page 14 Avoid installing Y Branches back wards as shown in Figure 36 Re frigerant flow cannot make U turns through Y Branches Figure 36 Due to our policy of continuous product innovation some specifications may change without notification LG Y Branch kits consists of e Two Y Branches one liquid line one vapor line e Reducer fittings as applicable e Molded clam shell type insulation covers The pipe coming from the outdoor unit should always connect to the single port end of the Y Branch as shown in Figure 37 Y Branches may be installed in a horizontal or vertical configuration When installed in the horizontal configuration po
25. TVNNVW ONINSANIDNE LINN SNISNSGNOD did 1VIH SA 4 FARA System Engineering PLACEMENT CONSIDERATIONS MULTI V Outdoor Unit Minimum Clearance General Mounting Securely attach the outdoor unit to a condenser pad base rails or other approved mounting platform that has been securely anchored to the ground or building structure Refer to Figure 10 through Figure 13 and follow the applicable local code for clearance mounting anchor and vibration attenuation requirements set fourth by the structural engineer Figure 10 Outdoor Unit Mounting and Service Clearances Plan View 24 3 8 Mi Bolt Diameter 1 2 typical of 4 yl 4 Min Airflow Clearance P 00 12 Min Maintenance Clearance Compressor and control component _access _ 4 Min Airflow Clearance 24 Min Maintenance Clearance Figure 11 Outdoor Unit Mounting and Service Figure 12 Mounting Method 12 Figure 13 Mounting Method 2 Clearances Elevation View bra ntl vioration See Figure 12 Conade maternas i Spring washer base y Minimum rame Nut 3 thread ridges l Beam TAF lt Anti vibration are material 3 J Concrete iY base Anchor Bolt Anchor Bolt A Note 1 Minimum airflow clearance specifications are based on a Single unit installation without obstructions Refer to Clear ance Requirements on page 56 for specific airflow clearance requirements when obstructions are present 2 All referenced materials are to be
26. Temperature F ane Air Temp F DB MBh PI MBh PI MBh PI MBh PI MBh PI MBh PI MBh PI e 2 4 15 26 163 333 188 370 210 415 235 41 251 478 277 70 C wo m 148 206 185 os aw am es ns 268 1 on ss 3m 90 24 18 296 227 33 26 370 308 415 353 441 385 478 43 5 29 0 254 121 286 137 317 156 355 175 378 185 409 207 oT 209 10 254 13 286 151 317 171 355 191 378 205 409 226 wo ma 121 s 181 as 178 a7 a ass 23 ss 25 wo 200 29 147 254 188 286 216 37 251 355 28 378 314 409 355 a 175 06s 212 os ase ose 265 1u 206 12 ns ta a1 154 o 175 on m 090 2s 108 265 148 ae 13 ns t a1 19 o n 175 oa 212 0 238 109 265 12 26 139 35 148 341 165 es o a oe s an i es tas e aan EC ao a EA o n amp 175 08 212 1 238 1 265 136 206 152 315 163 341 180 50 o 175 o 212 10 28 14 265 1 m6 19 ns 20 41 22 o n w 75 7 212 147 28 173 265 20 26 230 315 250 341 283 Capacity rated using ISO 5151 Test Rating Standard for Non Ducted Heat Pumps Rated with an equivalent piping length of 24 6 ft and no change in elevation between the Cooling mode stable operation is ensured whe
27. Temperature RCL RUR K12 AH AV RF RP E Polyvinyl Ether E E E Equivalent Length in Feet Regional Priority LEED Related Running Unit Ratio EPDM Ethylene Propylene Diene M Class Rubber A EV LF SP TL Q U PVE RAT Electronic Expansion Valve RCL Refrigerant Concentration Limit RP RUR K2 z Schoots LEED Related E U S Green Building Council LEED Related ons Indoor Air Quality Variable Refrigerant Flow Innovations in Design LEED Related Ventilation Rate Procedure Indoor Unit Water Efficiency LEED Related A ID LG Electronics USA Inc LG will replace defective internal functional parts Part s of a qualified MULTI V VRF System System as defined below that fails during the warranty period if it proves to be defective in materials and or factory workmanship under normal application in stallation use and service conditions This Limited Warranty shall apply to the System sold by LG in the continental United States Alaska and Hawaii and extend only to the original end use purchaser and subsequent owner s of location on which the System is originally installed all such persons herein after referred to as Customer A qualified system is defined as a System installed by an individual and or company who a holds a current government issued license that authorizes the individual and or company to service and install heating ventilation and air conditionin
28. Unit Minimum Clearance Clearance Requirements General Proper airflow through the outdoor unit coil is critical for proper unit operation Figure 17 through Figure 32 illustrate clearance requirements for various installation scenarios for the ARUNO36GS2 3 0 ton ARUN047GS82 4 0 ton and ARUN053GS82 4 4 ton Use the hot isle cold isle back to back or face to MULTI V MINI Legend LR Rear wall height LF Front wall height face approach when placing multiple units in close proximity to each other Outdoor unit fans draw air H Unit height from the back of the unit and discharges out the front Best practice would place units back to back or face to face A Note Vii bia campy Figure 17 Single Unit high front wall Figure 18 Single Unit high rear wall l with building overhang and no side walls and low front wall with no side walls All figures not to scale Sa A Never place multiple units facing back A GA to front or front to back as shown below a gt s High and low system pressure problems w gt 2 H may occur i A _ a Airflow Airflow e AR A aoe e UA e ee SP F ka Figure 19 Single Unit high rear wall with Figure 20 Single Unit high rear and Figure 21 Side by Side high rear and or without high side walls front walls with no side walls side walls mp EE j H a a ae E s 2 a i i sf Ta t w a gis ot ee DA eS ae Figure 24 Single Unit high rear del aie ee r
29. and TR small frame chassis TN TM and TP large frame chassis PRODUCT DATA 17 TVANVIA ONIMSSNIDNA LINN ONISNSGNOD did VIH SA SA FARAN Product Data GENERAL DATA Indoor Units MULTI N Table 4b Summary Data Ducted Indoor Units Unit Ducted High Static Ducted Low Static Slim Convertible Ducted Low Static Slim Bottom Return 1 External static pressure may be increased to 1 0 in However there is a 3 reduction in airflow for every 0 1 in additional air pressure drop 2 Maximum static pressure settings may result in sound levels different from rated conditions published in the Indoor Unit Engineering Manual 18 PRODUCT DATA Due to our policy of continuous product innovation some specifications may change without notification Nominal Capacity Btu h Maximum External Air Flow Rate Total Cooling Heating in wg H M L 283 012 550202029 48 NK 48 000 54 000 0 80 54NK 54 000 60 000 0 80 All indoor units are 208 230V 60Hz 1Ph Airflow data is presented with fan speedset at factory setting Static Pressure Oo gt N 388 353 283 494 4241353 600 530 353 530 480 380 710 640 480 880 800 630 990 880 800 1250 1100 1000 1400 1260 1000 1475 1400 1260 Reference LG s Multi V Indoor Unit Engineering Manual for more detailed engineering data Model shows nominal capacity MBh and chassis size designator MULTI N GENERAL DATA Indoor Units
30. and shielded cable RS485 terminated via screw terminals on the control boards The microprocessor control provides the following functions self diagnostics auto restart following power restoration test run and will operate the indoor unit using one of five operating modes 1 Auto Changeover 2 Heating 3 Cooling 4 Dry 5 Fan Only The Auto Changeover setting automatically switches between Cooling and Heating modes based on room temperature condi tions Heated or cooled air delivery is depen dant upon outdoor unit type and system operating mode In Heating mode the microprocessor control will activate the indoor unit when indoor room temperature falls below set point temperature and signals the outdoor unit to begin the heating cycle The indoor unit fan operation is delayed until coil pipe temperature reaches 76 F Significant airflow is generated when pipe temperature reaches 80 F In lieu of factory return air thermistor pluggable control wire connec tion sockets on the microprocessor circuit Due to our policy of continuous product innovation some specifications may change without notification MULTI V board accommodate various models of wall or unit mounted local controllers and or a wall mounted remote temperature sen sor The unit microprocessor is capable of accepting space temperature readings concurrently or individually from either 1 Wall or unit mounted wired controller s 2 Facto
31. charged using a rect line sizing Designer must verify refrigerant Estimated charge per linear foot Actual refrigerant charging scale Superheat method piping design configuration using LATS Multi V refrigerant charge varies and can be calculated will not work software to validate the pipe design using LG s LATS computerized refrigerant piping Table 2 Electrical Characteristics Outdoor Unit 60 Cycle Compressor and Fan Motors Compressor Motor Fan Motor s Nom Unit moget no Un Orea ea 9 3 Volts Phase No Volts Phase RLA ea FLA ea kW ARUN053GS2 187 253 TVANVIA ONINSSNIDNA LINN ONISNSGNOD did VIH SA SA PARAN MCA Minimum Circuit Ampacity Maximum allowable voltage unbalance is 2 MOP is calculated as follows MFS Maximum Fuse Size HACR type circuit breaker per NEC Largest motor FLA x 2 25 Sum of other motor Voltage tolerance is 10 FLA rounded down to the nearest standard fuse size Acoustic Data Table 3 Outdoor Unit Sound Pressure Level Cooling Operation dB A Heating Operation dB A se ARUN053GS2 Measurements are taken with no attenuation finished floor and a distance of 3 3 ft from the Off Peak Operation Logic takes advantage of Sound pressure levels are tested in an anechoic and units operating at full load nominal operating face of the fan discharge lower outdoor ambient temperatures and limits chamber under ISO Standard 1996 Actual condition Sound Power Levels are measured in db A
32. connected ductless split systems and LG digital output kits AC Ez PQCSZ250S0 The AC Ez controller provides a centralized point where up to 32 indoor units or indoor unit groups can be controlled and monitored The controller allows control of the operating mode fan speed lou ver direction and temperature setpoints of all indoor units individually by group or all 8 individual programmable schedules allow for automatic energizing and shutdown of indoor units individually or by group with operation mode and setpoint control Up to 16 AC Ez controllers may be linked together on a single communication bus providing control and monitoring of up to 256 indoor units Features o o LED indicator for operating status each indoor unitor Ventilation Mode control individually by group all indoor unit group e Fan Speed control individually by group all e Group selection button 1 or 2 e Discharge vanes Auto Swing Fixed Control a group of up to 16 indoor units or indoor unit Time clock groups 8 programmable schedules with Mode and Setpoint e On Off control individually by group all control e Temperature control F or C Holiday schedule override Instantaneous room temperature display e Zone controller lock individually by group all Setpoint control individually by group all e Error code display during unit or system malfunction Cooling range 64 86 F e Power failure compensation
33. controllers Lock Unlock Adjustable temperature setpoint range restriction Fan speed Auto Low Med High Power Automatic Changeover For two pipe systems operate between a specified time period Local zone controller functions may be restricted or locked out using AC Smart Indoor unit operating status display e Display Zones Groups Individual Units e Local controller Locked Unlocked e Operating mode Auto Cool Heat Unit operation On Off Malfunction e Discharge Louver Swing On Off Temperature control F or C e Cooling range F 64 86 e Heating range F 60 86 e Auto changeover temperature differential F 2 14 Options and accessories e Web Schedule Option Card PQCSE341A0 e Web Schedule and PDI Option Card PQCSE342A0 e 128 Expansion Kit PQCSE440U0 e Digital Output Kit PQNFPOOTO Operating schedule setup Set Mode Temp Temp Range Fan Speed Local Controller Lock Event driven weekly and daily schedule patterns MULTI NM As LG s most advanced central controller the AC Smart II delivers unparalleled options for Multi V system management and administration from a central location The AC Smart II provides a flexible platform from which a number of energy saving control sequences can be managed including system scheduling and supervision over local zone controllers in the occupied spaces By combining the AC Smart with the LG Digital Output Kit PQCSE440U0 third party ancillar
34. diagram Refer to the Equip ment Selection Procedure on page 47 for more information Design Choices LATS Multi V is flexible offering the HVAC system engineer a choice of two design methods 1 Using the CAD mode the refrigerant pipe design and layout work is performed concurrently Simply import a copy of a plan view drawing dwg format for each floor of the structure into LATS Multi V Select and place system components on the floor plan drawing s and draft interconnecting pipe between system components and riser pipe segments between floors Once the layout is complete use the export feature to create a file dxf for mat that can subsequently be imported into the building design drawings A Note On multiple story buildings all floor drawings must have the same reference point relative to each other 2 Using the TREE mode the engineer can quickly create a one line schematic drawing of the Multi V system and create an export file of the tree diagram in dxf format Integration of the engineered pipe system layout into the building drawings is done at a later date by the drafts person using standard drafting software tools 58 SYSTEM ENGINEERING Due to our policy of continuous product innovation some specifications may change without notification MULTI NM In either case LATS Multi V generates a report file xls format containing project design parameters cooling and heating design day system component perfor
35. evaporator and condenser coils VRF system designers must calculate and check the system s CR lf the system s CR is greater than 130 the combined heat transfer surface area of all connected indoor units is much greater than the heat transfer surface of the outdoor unit s which under some oper ating conditions raises the saturated suction operating temperature to an unacceptable level and may result in a VRF Multi V outdoor unit malfunction If the system s CR is less than 50 the combined heat transfer surface area of all connected indoor units is much less than the heat transfer surface of the outdoor unit s Under some operating conditions this lowers the saturated suction operating tem perature to an unacceptable level which may result in a VRF system malfunction In general a system malfunction caused by excessive component mismatch will not be revealed until the VRF system is operated at ambient air temperatures near design day parameters and the sys tem s compressor s are operating near full load All manufacturers of VRF equipment must set system design CR parameters to ensure proper system operation LG limits the CR of a Multi V system to be between 50 and 130 It has been reported that other manufacturers allow system s to be designed with CR ratings ranging from 50 to 200 VRF com pressor technology system operational limitations and the physical characteristics of R 410a refrigerant are very similar for al
36. field supplied 3 Images are not to scale All dimensions 0 25 inches 54 SYSTEM ENGINEERING Due to our policy of continuous product innovation some specifications may change without notification MULTI NM MINI PLACEMENT CONSIDERATIONS The Multi V Mini outdoor unit is designed to operate properly in a wide range of environmental conditions but correct placement of the outdoor unit is essential for maximizing unit performance Consider the following factors Wind Protection If the outdoor unit is located on a roof position it with the compressor end no coil surface in the direction of the prevailing wind as shown in Figure 14 In cooler climates it may be beneficial to position the unit in direct sunlight to as sist with defrost operations If the outdoor unit is not located on a roof it would be best to place it on the leeward side of the building or in a loca tion where the unit will not be exposed to constant wind as shown in Figure 15 If placement exposes the unit to constant wind activity construct a wind break in front of the unit as shown in Figure 16 Follow the placement guidelines set forth in Clearance Requirements on page 56 Mounting Platform The underlying structure or foundation must be designed to support Figure 14 Prevailing Winds Figure 15 Prevailing Winds Figure 16 Prevailing Winds the weight of the unit Unit weight is listed on the Cut
37. indoor unit has the capability of being controlled by up to two local wired controllers The microprocessor controls space temperature using the value pro vided by the temperature sensor sensing a space temperature that is farthest away from the temperature set point If the system is provided with an optional wall mounted or central controller dis played diagnostic codes are specific alpha numeric and provide the service technician with a reason for the code displayed Condensate Lift Pump The indoor unit is provided with a factory installed and wired condensate lift oump capable of providing a minimum 27 5 inch lift from the bottom exterior surface of the unit casing The lift pump comes with a safety switch that will shut off indoor unit if condensate rises too high in the drain pan Indoor Units Ceiling Concealed Ducted Low Static Bottom Return B3 B4 Casing The case is designed to mount concealed above a finished ceiling Discharge is front horizontal with a dedicated bottom vertical return The unit is manufactured with coated metal Cold surfaces are covered with a coated polystyrene insulating mate rial The case is provided with hanger brackets designed to support the unit weight on four corners Hanger brackets have pre punched holes designed to ac cept field supplied all thread rod hangers SPECIFICATIONS 111 TVNNVIN ONINSSNIDNA LINN ONISNSGNOD did 1VIH SA 4 FAREA Specifications 112 SPECIF
38. it as sists with the sizing of indoor and outdoor units by calculating component capacity based on design conditions LATS Multi V is the industry s only software that can import AutoCAD drawings and lay out the Multi V system to scale When the designer finishes the AutoCAD system layout all of the piping lengths will be calculated and a drawing file with the Multi V system will be available for export and integration into the building drawing set Energy Modeling LG stands behind efficiency and performance You will find Multi V in the EnergyPro building energy simulation soft ware from EnergySoft EnergyPro is approved by the California Energy Commission to accurately model and provide necessary documentation to comply with the rigourous California Title 24 Standards ASHRAE 90 1 compliance and to calculate the number of LEED Energy and Atmosphere Credit 1 EA 1 Building Energy Efficiency credits earned by the design team The software accurately models energy consumption and utility costs based on building design orientation location and other design conditions Due to our policy of continuous product innovation some specifications may change without notification Cs A ME A A a T eS fe ls pe Ni e ee o INTRODUCTION 9 TVNNVIN ONIYZ3NIONZ LINN ONISNSGNOD did 1VIH SA 4 FIDA PRODUCT DATA Product Features and Benefits on page 12 Unit Nomenclature on page 13
39. l dal l al 2a l al ES l dal Innovations in design or operations No credits offered on prerequisite requirements However before any credits can be earned prerequisite requirements must be met Definitions CI Commercial Interiors EA Energy and Atmosphere K12 Schools PR Prerequisite CR Credit ID Innovations in Design MR Material Reuse RP Regional Priority CS Core and Shell EQ Indoor Air Quality NC New Construction WE Water Efficiency O amp M Existing Building Operations and Maintenance Due to our policy of continuous product innovation some specifications may change without notification U S DESIGN STANDARDS 101 TVANVIA ONIMSSNIDNA LINN ONISNSGNOD did VIH SA SA FARAN SPECIFICATIONS VRF Multi V Mini Air Source Units 036 047 053 on page 104 All Indoor Units on page 105 Indoor Units Wall Mounted SE S5 S8 on page 105 Indoor Units 1 Way Ceiling Cassette TJ on page 106 Indoor Units 2 Way Ceiling Cassette TL on page 107 Indoor Units 4 Way Ceiling Cassette TM TN TP TQ TR on page 108 Indoor Units Ceiling Concealed Ducted High Static BH BG BR B8 on page 110 Indoor Units Ceiling Concealed Ducted High Static Slim Convertible B1 B2 on page 111 Indoor Units Ceiling Concealed Ducted Low Static Bottom Return B3 B4 on page 111 Vertical Horizontal Air Handler NJ NK on page 112 Indoor Units Ceiling Suspended VJ on pag
40. mm 4 TES T SA dl ea Mi ia 1 gr ee y e qie m lero Pra br e y es ma r wet Pg q NA r MULTI Y PIPE DESIGN PARAMETERS Liquid Line Pipe Design Parameters Device Connection Limitations Minimum number of connected indoor units per system 1 Minimum number of operating indoor units per system 1 Maximum number of indoor units on a system is ARUNO36 6 ARUN047 8 ARUNOD3 9 Table 19 Multi V Mini Liquid Line Pipe Design Parameters Pipe Length Total System 984 ELF Longest distance 492 feet Actual from ODU to IDU 574 feet Equivalent Distance between fittings and IDUs Sa Gee Minimum distance between IDU to any Y Branch REEF Maximum distance between first 131 feet Y Branch to farthest IDU pe Minimum distance from IDU to 3 feet Y Branch oe Elevation If ODU is above IDU 164 feet If ODU is below IDU 131 feet Between any two IDUs 49 feet IDU Indoor Unit ODU Outdoor Unit All elevation limitations are measured in actual feet ELF Equivalent length of pipe in feet Limitations refer to the liquid line length not the sum of the liquid and vapor Figure 34 Multi V Mini Pipe Configuration Limitations a If the outdoor unit is mounted below the indoor unit s Total piping length cannot exceed 984 feet Longest piping length after first branch aaa DU petween ypu and pone ee Level difference between ODU and IDU outdoor Uni
41. opened Outdoor air volume is a known quantity Air loads may be easier to calcu late since fans will regulate the amount of outdoor air May be used with a full lineup of Multi V indoor units Indoor units may have to be oversized to account for the added heating cooling loads when louvers hoods are open Roof Fan Hot cold and or humid areas may be present if the outdoor air is not evenly distributed to the different spaces OA Wall Louver Method 5 Coupled Dedicated Outdoor Air CDOAS A separate dedicated outdoor air system delivers air directly to a Multi V indoor unit or to the return air duct system After mixing with the return air stream ventilation air passes through the indoor unit and into the conditioned space The pretreatment system is capable of filter ing conditioning and dehumidifying outdoor air to room neutral conditions A Note Outside air may flow Advantage Disadvantages Separate ceiling registers Ducted 1 way and 4 way cassette indoor units are the only models de backward through the or grilles for introduction return air filter grille when the indoor unit fan speed is reduced of the outside air to the conditioned space may be signed for direct connection of an outside air duct The building occupant may not notice the outdoor air pretreatment system has malfunctioned until the unconditioned outdoor air exceeds the indoor or stops when the avoided unit mixed air
42. provides a minimum of three pre programmed fan speeds Fan settings are high medium and low Each setting can be field adjusted from the factory setting RPM ESP to com pensate for a limited amount of additional resistance to airflow caused by field con nected ductwork or other airflow restricting devices Air Filter Return air is filtered with a removable washable pre filter Microprocessor Controls The unit is provided with an integrated microprocessor based controller The con troller is capable of performing functions necessary to operate the system without the use of a wall mounted controller A temperature thermistor is factory mounted in the return air stream All unit operation parameters excluding the unit operating schedule are stored in non volatile mem ory resident on the unit microprocessor Operating schedules are stored in select models of the optional wall mounted local or central controller The field supplied communication cable between the indoor unit s and outdoor unit is to be a minimum of 18 AWG 2 conductor stranded and shielded cable RS485 terminated via screw terminals on the control boards The microprocessor control provides the following functions self diagnostics auto restart following power restoration test run and will operate the indoor unit using one of five operating modes Due to our policy of continuous product innovation some specifications may change without notificat
43. room temperature falls below set point temperature and signals the outdoor unit to begin the heating cycle The indoor unit fan operation is delayed until coil pipe temperature reaches 76 F Significant airflow is generated when pipe temperature Due to our policy of continuous product innovation some specifications may change without notification reaches 80 F In lieu of factory return air thermistor pluggable control wire connec tion sockets on the microprocessor circuit board accommodate various models of wall or unit mounted local controllers and or a wall mounted remote temperature sen sor The unit microprocessor is capable of accepting space temperature readings concurrently or individually from either 1 Wall or unit mounted wired controller s 2 Factory mounted return air thermis tor or the optional wall mounted wired remote temperature sensor The microprocessor controls space temperature using the value provided by the temperature sensor sensing a space temperature that is farthest away from the temperature set point If the system is provided with an optional local or central controller displayed diag nostic codes are specific aloha numeric and provide the service technician with the reason for the code displayed Handling Condensate The unit is designed to provide gravity draining of condensate LG provides a factory insulated flexible drain hose If condensate lifts oumps are needed for the applicat
44. runs for 30 minutes at high fan speed A chaos setting provides a random change in fan speed The fan speed algorithm provides a field selectable fixed speed or auto speed setting that adjusts the fan speed based on the difference between the controller set point and space temperature Air Filter Return air is filtered with a removable washable pre filter The unit is also equipped with a plasma filter Airflow Guide Vanes The architectural grille has four directional slot diffusers each equipped with inde pendent oscillating motorized guide vanes designed to change the angle airflow is discharged Discharge range of motion is 40 in an up down direction The unit has a guide vane control algorithm designed to sequentially change the predominant discharge airflow direction in a counter clockwise pattern The control algorithm also provides the capability of locking each guide vane independently in a field ad justed fixed position Guide vanes provide airflow in all directions The ends of each vane are tapered to provide airflow to the space in the direction of the four corners of the architectural grille Microprocessor Controls The unit is provided with an integrated microprocessor controller capable of per forming functions necessary to operate the system without the use of a wall mounted controller A temperature thermistor is factory mounted in the return air stream All unit operation parameters excluding the u
45. service technician with a reason for the code displayed Handling Condensate The unit is designed for gravity draining of condensate LG provides a factory insulated flexible drain hose If condensate lift oumps are needed for the application they are to be field provided The lift pump comes with a safety switch that shuts off the indoor unit if condensate rises too high in the drain pan Indoor Units 1 Way Ceiling Cassette TJ Casing The case is designed to mount recessed in the ceiling and has a surface mounted concentric grille on the bottom of the unit Due to our policy of continuous product innovation some specifications may change without notification MULTI V The unit case is manufactured with coated metal Cold surfaces are covered with a coated polystyrene insulating mate rial The case is provided with metal ears designed to support the unit weight on four corners Ears have pre punched holes designed to accept field supplied all thread rod hangers Ventilation Air The case has a factory designated cutout for the connection of a field supplied out side air duct and flange Architectural Filter Grille The ceiling cassette assembly is provided with an off white ABS polymeric resin archi tectural grille with a tapered trim edge and a hinged spring clip screw less return air filter grille door Fan Assembly and Control The indoor unit has a single direct drive cross flow tangential S
46. sheet on page 80 Avoid placing the unit in a low lying area where water may accumulate Tie Downs and Wind Restraints The strength of the Multi V Mini chassis is adequate to be used with field provided wind restraint tie downs The overall tie down configuration must be approved by a local professional engineer Always refer to local code when designing a wind restraint system Due to our policy of continuous product innovation some specifications may change without notification Wall or other wind break Dealing with Snow and Ice In climates that experience snow buildup place the unit on a raised platform to ensure proper outdoor unit coil airflow The raised support platform must be high enough to allow the unit to remain above the anticipated snow accumulation level consider snow drifts Design the mounting base to prevent snow accumulation on the platform in front or back of the unit case If necessary use inlet and discharge duct or a snow hood to prevent snow or ice from accumulating on the coil fan blades and fan guards Best practice prevents snow from accumulating on top of the unit as well When the system is commissioned adjust the DIP switch for snow throw operation if a snow hood is not used In all cases the outdoor unit supply and or discharge duct work or hood must be designed to have a combined air pressure drop rating that does not exceed 0 16 in wg TVANVIA ONIYSANIDNE LINN SNISNSGNOD did 1VIH SA 4 F
47. specifications may change without notification CUT SHEET 81 CUT SHEET Y Branch Kits Figure 72 Y Branch connectors Table 35 Figure 73 Reducer parts Table 37 Nominal Capacity Range Values expressed in BTUs ARBLN1621 lt 54 600 connected capacity ARBLN03321 lt 76 400 connected capacity Values expressed in BTUs Fitting Properties Material Copper Design Pressure 551 psig Figure 74 Y Branch connection dimensions Table 36 Insulation Jacket Properties la A A HE A SS i 1 84 ome 7 E Table 34 Y Branch Connection Diameters in ID Reference Figure 72 4 oo M a ss oe os ssl es a E AAA A AO D Table 35 Y Branch Dimensions in Reference Figure 74 Model YBranchtyee fA BE 8 a eee ee ee ARBLNO1621 ID Inside Diameter ARBLNO3321 3 9 32 6 29 32 10 29 32 15 11 32 16 1 4 Table 36 Reducer Diameters in Reference Figure 73 Port Identifier Qty Kit Reducer type PEI CI O O l A O ARBLNO1621 2 vapor fem The Y Branch kits include a Polyolefin foam Kit components must be kept free of debris and Images are not to scale pti E O A E E ae Vapor clam shell peel and stick insulation jacket for dry before installation Must follow installation instructions in the ap each Y Branch ID Internal Diameter OD Outside Diameter plicable LG installation manual LG Y Branch fittings must be used Field sup All dimensions in inches Tolerance 0 25 pli
48. surrounding insulation lf the pipe is mounted in free air space no natural restriction to movement is present if mounting clamps are properly spaced and installed When the refrigerant pipe is mounted underground in a utility duct stacked among other pipes natural restriction to linear movement is present In extreme cases the restrictive force of surface friction between insulating jackets could become so great that natural expansion ceases and the pipe is fixed in place In this situation opposing force caused by the change in refrigerant fluid vapor temperature can lead to pipe fitting stress failure The refrigerant pipe support system must be engineered to allow free expansion to occur When a segment of pipe is mounted between two fixed points provisions must be provided to allow pipe expan sion to naturally occur The most common method is the inclusion of expansion Loop or U bends See Figure 43 on page 69 Each segment of pipe has a natural fixed point where no movement oc curs This fixed point is located at the center point of the segment assuming the entire pipe is insulated in a similar fashion The natu ral fixed point of the pipe segment i ically where the expansion Loop or U bend Mi A SALIA expansion can be calculated using the following formula 3 Where LE Anticipated linear tubing expansion in C Constant For copper 9 2 x 10 in in F L Length of pipe ft T Refrigerant pipe temperatur
49. temperature RAT Return air temperature OAT Outdoor air temperature RA Percentage of return air OA Percentage of outdoor air A Note Avoid over sizing indoor units in an attempt to increase the room air recirculation rate VRF systems SYSTEM ENGINEERING 47 TWNNVI ONIYSANIDNG LINN SNISNSGNOD did 1VIH SA SA FAREM system Engineering EQUIPMENT SELECTION PROCEDURE ARUN 036 047 053 are designed for minimum airflow over the coil to maxi mize latent capacity while cooling maintain a comfortable consistent discharge air temperature while heating and minimize fan motor power consumption To properly size indoor unit s begin by referring to the output report provided by LG s LATS Multi V software and note the appropriate corrected cooling and heating capacity for each indoor unit for the cooling and heating design days In LATS the corrected cooling capacity is different from the nominal cooling capacity because the corrected capacity includes changes in unit performance after considering refrigerant line pres sure drop the system s Combination Ratio CR and the effect design ambient operating conditions has on the indoor unit s cooling capability The building sensible cooling load is typically the critical load to satisfy In coastal areas or humid applications such as high occu pancy spaces both the latent and sensible cooling loads should be considered In areas where the cooling and heating loads are s
50. tox on na 1 27 118 ns 128 5 as 08s ts o o oor tet IE a a ar tat a n 126 ose 153 os 172 097 191 112 24 12 227 1m 26 159 Capacity rated using ISO 5151 Test Rating Standard for Non Ducted Heat Pumps Rated with an equivalent piping length of 24 6 ft and no change in elevation between the Cooling mode stable operation is ensured when the outdoor ambient dry bulb temperature is between 23 F and 115 F indoor and outdoor unit Rapid cooling operation is stable at indoor temperatures up to 80 F DB MBh Net Capacity Power Input PI in kW and includes compressor s and outdoor fan motor s R410A 60 Hz 24 PERFORMANCE DATA Due to our policy of continuous product innovation some specifications may change without notification MULTI V PERFORMANCE DATA Cooling Capacity 4 0 Ton Table 8a ARUNO47GS2 Heat Pump Nominal Cooling Capacity Outdoor Air Indoor Unit Entering Air Wet Bulb Temperature F Temp F DB MBh PI MBh Pl MBh Pi MBh PI MBh Pl MBh PI MBh PI Combination Ratio no te 4 250 562 288 604 317 620 320 625 32 61 32 1 pT no 2 44 257 52 310 54 335 609 337 615 339 630 3482 n w no 20 44 273 52 33 5 amp 8 352 599 355 609 357 620 36o E 44 306 562 370 se 375 588 378 509 380 609 388 8 no 248 a 330 552 399
51. wall mounted remote temperature sensor The unit microprocessor is capable of accepting space temperature readings concurrently or individually from either 1 Wall mounted wired controller s 2 Factory mounted return air thermistor or the optional wall mounted wired remote temperature sensor A single indoor unit has the capability of being controlled by up to two local wired controllers The microprocessor controls space temperature using the value pro vided by the temperature sensor sensing a space temperature that is farthest away from the temperature set point If the system is provided with an optional wall mounted local or central controller displayed diagnostic codes are specific alpha numeric and provide the service technician with a reason for the code displayed Due to our policy of continuous product innovation some specifications may change without notification MULTI NM Condensate Lift Pump The indoor unit is provided with a factory installed and wired condensate lift pump capable of providing a minimum 27 5 inch lift from the bottom exterior surface of the unit casing The lift pump comes with a safety switch that will shut off indoor unit if condensate rises too high in the drain pan Vertical Horizontal Air Handler NJ NK Casing The unit is designed to operate in the verti cal up flow configuration or horizontal left end discharge Return air opening is on the bottom in the vertical position
52. will activate indoor unit operation when the indoor room temperature falls below setpoint temperature At which point a signal is sent to the outdoor unit to begin the heating cycle The indoor unit fan operation is delayed until coil pipe temperature reaches 76 F Significant airflow is generated when pipe temperature reaches 80 F The unit is equipped with an infrared receiver designed to communicate with an LG hand held remote control ler In lieu of wireless remote or factory return air thermistor pluggable connec tion sockets on the microprocessor circuit board accommodate various models of wall mounted local controllers and or a wall mounted remote temperature sensor The unit microprocessor is capable of accepting space temperature readings concurrently or individually from either 1 Wall mounted wired controller s 2 Factory mounted return air thermistor or the optional wall mounted wired remote temperature sensor A single indoor unit has the capability of being controlled by up to two local wired controllers The microprocessor controls space temperature using the value pro vided by the temperature sensor sensing a space temperature that is farthest away from the temperature set point The microprocessor control provides a Cooling mode test cycle that operates the unit for 18 minutes without regard to the space temperature Ifthe system is pro vided with an optional wall mounted local or central controller dis
53. 000 RUR 9 x 12 000 x 100 195 SYSTEM ENGINEERING 91 TWNNVI ONIYSANIDNE LINN ONISNSGNOD diNNd 1VIH SA SA FAREM System Engineering EQUIPMENT SELECTION PROCEDURE ARUN 036 047 053 Since the RUR is greater than 130 the low fan speed lock control algorithm has limited all indoor fans to low speed operation At the low fan speed setting the indoor unit capacity is reduced to 33 of the nominal design capacity reducing the maximum available capacity of each indoor unit from 13 000 Btu h when the fan is running on high speed to 4 290 Btu h 33 of 13 000 Btu h when the fan speed is locked in low Considering each indoor unit has a maximum capacity of 4 290 Btu h while the low fan speed lock algorithm is controlling the indoor units and the design day cooling load in each space is 6 500 Btu h the indoor unit cooling capacity appears to be inadequate In addition to dealing with the indoor unit s capacity being inad equate the algorithm will keep the fan speed locked in low until the system s operating RUR drops to 90 In this example designed with a 195 CR and operating with an RUR above 130 the RUR would have to subsequently drop by 46 90 195 to return the indoor units to multispeed operation In this example 5 indoor units 46 of 9 units would have to stop calling for cooling to lower the system s RUR to lt 90 at which point the remaining 4 indoor units return to multi speed fan operation an
54. 2 hours max e Heating range 60 86 F e Up to 16 AC Ez controllers and 256 indoor units e Operation Mode control individually by group all A Note Availability depends on the indoor unit model being controlled See Table 6 Indoor Units Controls and Options on page 20 Due to our policy of continuous product innovation some specifications may change without notification CONTROLS 89 TVNNVI ONINSANIDNE LINN DNISNIONO9 did 1VIH SA VA VIVIA Controls CENTRAL CONTROLLERS MULTI NM ACP Advanced Control Platform PQCPA11A0E and PQCPB11A0E 90 CONTROLS The LG Advanced Control Platform ACP central controller combines ease of installation and deployment with robust options for administrating and managing the operation of LG s air conditioning products through a standard Internet web browser The networkable ACP is designed around an IP architecture that is scalable to the largest multitenant commercial and institutional projects The ACP will accommodate up to a combined 256 LG Multi V indoor units and integration accessories spread across a maximum of 64 systems per controller The browser based graphical user interface pro vides system administrators with practical options for optimizing operational efficiencies and occupant comfort while reducing the service and maintenance burden Offered in two models an ACP controller with digital input and output points PQCPB11A0E pictured is available to prepare sy
55. 2007 Designation and Safety Classification of Refrigerants Standard 62 1 2010 Ventilation for Acceptable Indoor Air Quality A Note We are providing a summary of the standards impacting the design of the Multi V system or the safety of building oc cupants see Table 41 Refer to the ASHRAE Standards for detailed design information Designing for Refrigerant Safety with Multi V ASHRAE Standards 15 and 34 Standards 15 2004 and 34 2007 were developed to educate the design community on the safe use of refrigerants in commercial buildings and to address the classification of refrigerants All Multi V systems use R410A refrigerant which ASHRAE Standard 15 2004 and ASHRAE Standard 34 2007 classify in Safety Group A1 and rate it as neither in the toxicity category titled highly toxic or toxic under code clas sification These are the same ratings given to refrigerants R22 R134A and R407C and are the safest ratings given in the standards to any refrigerant The displacement of oxygen in an occupied space could lead to occupant asphyxiation in the event of a catastrophic release of the entire system s refrigerant charge The standard allows a Refrigerant Concentration Limit RCL of 0 025 lbs ft for R410A in most applications refer to the standard for exceptions The RCL rating indicates the allowable concentration by weight of refrigerant per cubic foot of room volume to avoid escape impairing effects such as oxygen deprivatio
56. 8 6 32 7 68 73 8 738 727 669 an 686 4tw 602 416 709 69 8 68 6 674 66 3 64 5 634 581 6o 59 6o 6o 613 628 61 6 58 7 57 0 56 4 725 725 725 725 725 725 725 714 69 1 68 5 66 7 66 2 65 1 634 62 2 61 59 9 57 7 55 9 55 4 712 712 712 712 712 712 712 70 1 67 8 67 2 66 1 65 0 63 9 588 549 600 554 605 556 616 61 560 59 577 600 sss 603 58 8 56 6 54 9 8 40 54 3 8 47 Rated with an equivalent piping length of 24 6 ft and no change in elevation between the WO gt Cooling mode stable operation is ensured when the outdoor ambient dry bulb temperature is between 23 F and 115 F indoor and outdoor unit Rapid cooling operation is stable at indoor temperatures up to 80 F DB Power Input PI in kW and includes compressor s and outdoor fan motor s 28 PERFORMANCE DATA Due to our policy of continuous product innovation some specifications may change without notification MBh Net Capacity R410A 60 Hz MULTI V PERFORMANCE DATA Cooling Capacity 4 4 Ton Table 9b ARUNO53GS2 Heat Pump Nominal Cooling Capacity Outdoor Indoor Unit Entering Air Wet Bulb Temperature F Air Temp F DB MBh PI MBh PI MBh PI MBh PI MBh PI MBh 630 Combination Ratio 76 oe elias 63 0 ag 19 423 240 476 2768 59 314 592 353 630 379 667 4n a io m 2a es 20 are o9 s
57. 9 308 122 o s oor w on 218 os ns os ss 107 s4 1u ss 12 o ss oe 191 on 218 o 2o o ss in 18 ws 10 o 6 158 ose tes ee 215 0988 239 105 268 118 234 12 308 139 E E 268 12m 284 19 308 142 a so 158 o7s 191 0o93 215 108 239 125 268 143 284 156 308 176 ESAS A ANA AAA A A ANA ANA w ss ow e ou as 19 ns 1 ms in ma 1 ms 2 E ts os tes 121 215 148 29 165 268 to 284 207 308 235 Capacity rated using ISO 5151 Test Rating Standard for Non Ducted Heat Pumps Rated with an equivalent piping length of 24 6 ft and no change in elevation between the Cooling mode stable operation is ensured when the outdoor ambient dry bulb temperature is between 23 F and 115 F indoor and outdoor unit Rapid cooling operation is stable at indoor temperatures up to 80 F DB MBh Net Capacity Power Input PI in kW and includes compressor s and outdoor fan motor s R410A 60 Hz Due to our policy of continuous product innovation some specifications may change without notification PERFORMANCE DATA 2 N IVANVIA ONIYIINIDNA LINN DNISNIONO9 dNNd 1VIH SA 4 4 INDIA Performance Data PERFORMANCE DATA Cooling Capacity 4 4 Ton Table 9a ARUNO53GS2 Heat Pump Nominal Cooling Capacity Outdoor O KR Combination ceo lee F DB_ MBh Pl MBh Pl 130 120
58. 9 a2 s2 e om so a sw o a 278 es a are s vo sm s7 sn z ss sz sn w as 173 381 213 428 245 476 278 533 312 567 335 64 3n so 314 tos 381 255 428 302 476 353 533 409 567 448 609 505 o 314 23 381 314 8 374 ae 43 53 5o 567 559 581 575 z9 15 39 187 381 215 423 243 474 273 504 292 546 323 wo s in so ow set 287 23 20 aa ou w4 arn s6 17 o z9 20 339 26 381 317 3 3m 474 428 5o4 468 546 533 Capacity rated using ISO 5151 Test Rating Standard for Non Ducted Heat Pumps Rated with an equivalent piping length of 24 6 ft and no change in elevation between the Cooling mode stable operation is ensured when the outdoor ambient dry bulb temperature is between 23 F and 115 F indoor and outdoor unit Rapid cooling operation is stable at indoor temperatures up to 80 F DB MBh Net Capacity Power Input PI in kW and includes compressor s and outdoor fan motor s R410A 60 Hz Due to our policy of continuous product innovation some specifications may change without notification PERFORMANCE DATA 2 co IVANVIA ONIMSSNIDNA LINN DNISNIONO9 dNNd 1VWIH SA 4 4 INDIA Performance Data PERFORMANCE DATA MULTI V Cooling Capacity 4 4 Ton Table 9c ARUNO53GS2 Heat Pump Nominal Cooling Capacity Outdoor Indoor Unit Entering Air Wet Bulb
59. 90 2 80 2 69 259 2 53 2 45 3 84 4 25 3 72 3 50 3 23 3 02 2 11 259 2 44 Zot 2 29 2 20 2 14 Indoor Unit Entering Air Dry Bulb Temperature F 64 67 fo 76 MBh PI MBh PI MBh MBh PI MBh PI MBh B O Rated with an equivalent piping length of 24 6 ft and no change in elevation between the Heating mode stable operation is ensured when the outdoor ambient wet bulb temperature is between 4 F and 60 F indoor and outdoor unit Power Input PI in kW and includes compressor s and outdoor fan motor s 36 PERFORMANCE DATA Due to our policy of continuous product innovation some specifications may change without notification MBh Net Capacity R410A 60 Hz MULTI V PERFORMANCE DATA Table 12a ARUNO53GS2 Heat Pump Nominal Heating Capacity Outdoor Air Indoor Unit Entering Air Dry Bulb Temperature F indoor Unit Entering air Dry Bulb Temperature F a a a a w z7 wo Mh Pi men Pi men Pi men Pi men Pi MBh Pi men Pi men z Combination Ratio 130 mo 57 1 1 1 120 mo m0 ms oo wo om mo om ws ow ws esr ws om as om ms on o gt o gt N mo mo 53 os sso om s30 600 py h o ic Capacity rated using ISO 5151 Test Rating Standard for Non Ducted Heat Pumps Rated with an equivalent piping length of 24 6 ft and no change in elevation between the Heating mode stable operation is e
60. A Electrical Ratings G 208 230V 60Hz 1Ph Airflow Configuration S Side Discharge Generation 2 Second ARN U 07 3 TN C 2 Family tt Indoor ARN Multi V Indoor Unit Refrigerant R410A Type U DC Inverter Heat Pump Nominal Capacity 05 5 000 Btu h 18 18 000 Btu h 42 42 000 Btu h 07 7 000 Btu h 24 24 000 Btu h 48 48 000 Btu h 09 9 000 Btu h 28 28 000 Btu h 54 54 000 Btu h 12 12 000 Btu h 30 30 000 Btu h 15 15 000 Btu h 36 36 000 Btu h Electrical Ratings 3 208 230V 60Hz 1Ph B1 Ducted low static convertible CF Floor Standing TM 4 Way Ceiling Cassette B2 Ducted low static convertible S5 Wall Mounted TN 4 Way Ceiling Cassette B3 Ducted low static bottom return NJ Vertical Horizontal TP 4 Way Ceiling Cassette B4 Ducted low static bottom return NK Vertical Horizontal TQ 4 Way Ceiling Cassette BG Ducted high static SE Wall Mounted Mirror TR 4 Way Ceiling Cassette BH Ducted high static TJ 1 Way Ceiling Cassette VE Convertible Surface Mounted BR Ducted high static TL 2 Way Ceiling Cassette VJ Ceiling Suspended CE Floor Standing S8 Mirror Feature A Basic R Mirror and Neo Plasma C Plasma Filter U Uncased G Low Static L Neo Plasma Generation 2 Second A Note Nominal capacity is obtained when applied with non ducted indoor unit Due to our policy of continuous product innovation
61. AREMA A Note Snow throw mode does not prevent ice from forming on the fan blade or discharge grille Ambient Air Conditions Do not place the unit in a corrosive environment Avoid exposing the outdoor unit to steam combustible gases chimneys steam relief ports other air conditioning units kitchen vents plumbing vents discharge from boiler stacks and other sources of extreme tempera ture gases or substances that may degrade performance or cause damage to the unit When installing multiple outdoor units avoid placing the units where discharge air from the front of one outdoor unit is blown into the back side of an adjacent unit Handling Outdoor Unit Condensate While operating in the Heating mode the surface temperature of the outdoor coil may drop below the dew point of the surrounding air Moisture may condense on the coil fins and subsequently drain onto the surface of the surrounding area from the bottom of the unit case If the designer chooses to control the flow of condensate from the outdoor unit install a field provided drain pan under the unit and pipe the condensate to a nearby drain Mount the unit in the pan on rails or isolation pads If the unit will be operating near or below freezing with a condensate drain pan installed consider installing heat tape in the bottom of the outdoor unit drain pan and along the condensate drain line SYSTEM ENGINEERING 99 system Engineering CLEARANCE REQUIREMENTS Outdoor
62. BLDC design with permanently lubricated and sealed ball bearings The fan motor assembly is mounted in vibration attenuat ing rubber grommets The fan speed is controlled using a microprocessor based direct digital control algorithm that provides a minimum of three pre programmed fan speeds Fan settings are high medium and low Each setting can be field adjusted from the factory setting RPM ESP to com pensate for a limited amount of resistance to airflow caused by field connected duct work or other airflow restricting devices MECHANICAL SPECIFICATIONS Indoor Units Ceiling Concealed Ducted High Static Slim Convertible B1 B2 Air Filter Return air is filtered with a removable washable pre filter Microprocessor Controls The unit is provided with an integrated microprocessor based controller The con troller is capable of performing functions necessary to operate the system without the use of a wall mounted controller A temperature thermistor is factory mounted in the return air stream All unit operation parameters excluding the unit operating schedule are stored in non volatile mem ory resident on the unit microprocessor Operating schedules are stored in select models of the optional wall mounted local or central controller The field supplied communication cable between the indoor unit s and outdoor unit is to be a minimum of 18 AWG 2 conductor stranded and shielded cable RS485 terminated via s
63. CP s Web Interface display shown is required to re TETE ef motely view and save PDI data on an Intranet or Internet Sn eee ceee emite a mm connected computer ee a 3 PDI data may be remotely read at LG s AC Smart II Cen quan E tral Controller PQCSW320A1E with the purchase of an nin ma optional interface card PQCSE342A0 fani ES 4 Indoor unit power consumption is not included in the A TO aram O i O reported data COTA he m Figure 80 AC Smart II Output Pa A y 12 quad A ee eee ee 11 de pl p gt l A 2 1 La 94 CONTROLS Due to our policy of continuous product innovation some specifications may change without notification U S DESIGN STANDARDS ASHRAE Standards Summary on page 96 Building Sustainability on page 100 U S Design Standards ASHRAE STANDARDS SUMMARY MULTI V ASHRAE Standard 15 2004 and ASHRAE Standard 34 2007 Members of the American Society of Heating Refrigerating and Air Conditioning Engineers ASHRAE have collaborated to develop voluntary standards to assist design professionals with e Industry best practices to safely use refrigerants e Guidelines to properly ventilate commercial buildings using various technologies Proper control of building temperature and relative humidity e Design building systems to minimize energy and water consumption Table 41 ASHRAE Publications Standard 15 2004 Safety Standard for Refrigeration Systems Standard 34
64. Capacity R410A 60 Hz UY 5 Due to our policy of continuous product innovation some specifications may change without notification PERFORMANCE DATA 3 w IVANVIA ONIMSSNIDNA LINN SNISNSGNOD dNNd 1WIH SA 4 4 INDIA Performance Data PERFORMANCE DATA Heating Capacity 4 0 Ton Table 11a ARUNO47GS2 Heat Pump Nominal Heating Capacity Combination 61 64 co Ratio DB WB MBh MBh PI MBh PI 130 ar or w ws se ms om m ws s wo ao 15 0 473 20 0 50 3 25 0 54 1 120 30 0 55 4 35 0 58 0 40 0 45 0 63 7 47 0 65 6 50 0 55 0 68 8 73 2 37 4 37 4 5 0 41 6 10 0 44 0 E 15 0 46 9 20 0 49 3 25 0 517 110 30 0 52 9 35 0 54 0 40 0 56 4 45 0 59 4 47 0 59 9 50 0 62 3 4 4 4 4 4 Capacity rated using ISO 5151 Test Rating Standard for Non Ducted Heat Pumps Heating mode stable operation is ensured when the outdoor ambient wet bulb temperature is between 4 F Power Input PI in kW and includes compressor s and outdoor fan motor s on on N o 34 PERFORMANCE DATA Due to our policy of continuous product innovation some specifications may change without notification 6 MBh 39 8 40 5 45 3 47 3 50 6 53 4 57 4 58 7 61 5 64 1 66 1 68 2 70 8 72 8 76 3 38 8 38 2 42 7 44 6 47 8 50 3 54 1 55 4 58 0 g 62 5 64 4 68 8 72 0 36 3 37 4 41 6 44 0 46 9 49 3 51 7 52 9 54 0 56 4 58 2 59 9 62 3 62 3 62 3 and 60 F MULTI
65. ICATIONS MECHANICAL SPECIFICATIONS Indoor Units Ceiling Concealed Ducted High Static Slim Convertible B1 B2 Fan Assembly and Control The unit has two Sirocco fans made of high strength ABS HR 2407 polymeric resin Both fans are directly driven and mounted on a common shaft The fan motor is a brushless digitally controlled BLDC design with permanently lubricated and sealed ball bearings The fan motor assembly is mounted in vibration attenuat ing rubber grommets The fan speed is controlled using a microprocessor based direct digital control algorithm that provides a minimum of three pre programmed fan speeds Fan settings are high medium and low Each setting can be field ad justed from the factory setting RPM ESP to compensate for a limited amount of additional resistance to airflow caused by field connected ductwork or other airflow restricting devices Ceiling Grille Duct Kit An optional flush mounted ceiling return air grille and accordion style canvas duct kit provides a short ducted return air solution Air Filter Return air is filtered with a removable washable pre filter Microprocessor Controls The unit is provided with an integrated microprocessor based controller The con troller is capable of performing functions necessary to operate the system without the use of a wall mounted controller A temperature thermistor is factory mounted in the return air stream All unit operation parameters e
66. Inlet Temperature Sensor Low Pressure Sensor High Pressure Cutout High Pressure Sensor High Temp High Pressure Vapor High Temp High Pressure Liquid Low Temp Low Pressure Vapor Solenoid Hot Gas Valve Solenoid Bypass Valve Service Valve Flow Regulator Field Piping Connection 4 Way Valve Electronic Expansion Valve EEV Temperature Sensor Strainer Pressure Sensor Pressure Switch Y Branch High Pressure Sensor IDU Coil IDU Fan PERFORMANCE DATA 41 IVANVIA 9NIXIINI9NI LINN DNISNIANOS9 dNNd 1VIH AA VA FADIA Performance Data OUTDOOR WIRING DIAGRAM Figure 9 Outdoor Unit Wiring Diagram CN POWER Black White Inverter Board Blue CN43 CN38 CN29 Sw01B Sw02B Error Code Ty Display O 00 A Ol CNO5 Swo2v B 5 CN INVERTER cn 8 CN41 S CN17 O 3 O Noise Filter CN16 SWO1V CN15 L1 N1 CN14 2 T CN13 Thermister Connections TH CN11 TH_SC_OUT omma Red TH_SC_IN CN33 Sp FUSE i TH_SC_L SE 250V 35A ias IA Lin 5 Sento O Black Oa TH_DISCHARGE A eS EA O O CNog TH_HEX1 CN34 2 ae AS TH_HEX2 e y 1 1 1 CN27 CN32 CN30 TH_AIR Oh i O TH_SUCTION CN35 BG TH_DISCHARGE B gt 19 208 230V 60Hz SODU SODU IDUA IDUB INTERNET DRY1 DRY2 GND 12V i A Black HE Red See Figure 61 INDOOR UNIT S See Fi 60 on page 75 Ne page 75 Color Legend Parenthesis Socket Color 1 Reactor Power conditioner to minimizes transient noise from
67. MULTI V Engineering Manual Variable Refrigerant Flow Air Cooled 3 0 4 4 Tons Represented by ka Aan et CERTIFIED www ahridirectory org Unitary Small AC AHRI Standard 210 240 Certification applies only when the complete system is listed with AHRI PROPRIETARY DATA NOTICE This document as well as all reports illustrations data information and other materials is the property of LG Electronics and are disclosed by LG Electronics only in confidence This document is for design purposes only VRF EM BB 001 US 011M21 For continual product development LG reserves the right to change specifications without notice OLG Electronics Inc About LG Electronics Inc LG Electronics Inc is a global leader and technology innovator in consumer electronics mobile communications and home ap pliances employing over 160 000 people in over 115 operations worldwide With global sales of 100 5 billion USD LG Electronics ranked 69th in the 2009 Fortune 500 list of largest companies LG comprises four business units Home Entertainment Mobile Com munications Home Appliance and Air Conditioning and Energy Solutions LG is one of the world s leading producers of flat panel televisions audio and video products mobile handsets air condi tioners and washing machines LG s commercial air conditioning business unit was established in 1968 and has built its lineup of residential and commercial products to include VRF
68. Multi V Pipe System Design TOO 2 2 senses tcc latte tales serail ae aratelecriens iio 58 A O A Minemeniart iadeaccumer barsatuamere baecanmuners Somomeod iadenaumn wwacamen bet 99 FINE DESIN Udo tn ooo ita 63 EG Engineered Y Branch and e ade ti lito tcalas 63 A A ane 74 WOW VONAGE VIN oaae E A aracreuateseshcunaunoenert aeasaus ee taun hs A E 15 Mini STIG V ANE CR ANC eiii cia a N bd 76 CUT FV Ee traida alada de 79 Dimensional Data Na Wes ias A A AA AA Ai 80 Pipe and Electiical Connections s teckenct ts a does lal val Geli Valet deus 81 MEDAN CI ISN A e tattle saat BO UE PEO II 82 Redder K A A A SS 83 SONTROLS ase sete tha ace arate ee ace ens dt 85 e eo poo o e A T enon eae N 86 Sentral OP ONES ct a tt at AB oe ait ve ih ne Rt e ral ae a Eo 253 NATE CATION SOUN Sorser n E A zoo y AR E N 91 Control PrOgucIS ACCESSONES siian a a A a 92 US DESIGN STANDARDS ud Na 95 ASARAEStandalas UM Vs tia Osa a a enia 96 ASHRAE Standard 15 2004 and ASHRAE Standard 3420 id A dwenaeteided las 96 ADHRAE Standard 02 12010 ade a nia aaa 98 Bulgaria oo 100 USGBCG LEED Green Buildmg Ratihg SM casaca aiii abad 100 EIA TON Seeds 103 Mechanical SP CCIICAUONS tt leete aid esla 104 O aarp sc sauce A 118 LIMITED WARRANT USAS E ota ta uO Ue ad Saas acca ict 119 INTRODUCTION Architectural Appeal on page 8 Engineers Advantage on page 9 Introduction ARCHITECTURAL APPEAL Convergence of Technological Innovation with Flexibility and Style
69. NCE DATA 2 a IVANVIA ONIVIINIDNA LINN DNISNIONO9 did VIH SA SA INDIA PERFORMANCE DATA MULTI V Cooling Capacity 4 0 Ton Table 8b ARUN047GS2 Heat Pump Nominal Cooling Capacity Outdoor Indoor Unit Entering Air Wet Bulb Temperature F Combination Air Tem Ratio gt Oo oo OD F DB MBh PI MBh Pl MBh PI MBh Pl MBh PI MBh PI MBh Pl o as w 2 tas aso 213 478 242 535 272 869 292 602 317 100 w as 475 382 228 430 270 478 318 535 370 554 390 564 392 o a5 215 382 28 430 335 478 306 521 442 526 44 535 447 ES A Q z o sa is m 19 sex 1 430 25 482 247 s2 258 665 266 O D 80 284 153 344 ter 387 23 430 273 482 316 512 346 551 389 o O 24 187 344 242 387 2888 43o 33s 482 393 512 431 525 443 o 252 118 ws 145 ua 165 382 1 428 210 455 225 493 2 80 252 13 306 169 344 19 382 231 428 266 455 29 493 329 32 162 306 207 344 245 382 286 428 330 455 361 493 41m Capacity rated using ISO 5151 Test Rating Standard for Non Ducted Heat Pumps Rated with an equivalent piping length of 24 6 ft and no change in elevation between the Cooling mode stable operation is ensured when the outdoor ambient dry bulb temperatur
70. STATE ASSERTION OF CLAIMS The assertion of claims under this Limited Warranty presupposes that the Customer has i informed the authorized reseller distributor of the System in writing of the alleged claim or that ii this written notifi cation has been sent directly to the address stated below in the event that the autho rized reseller distributor no longer exists e g due to discontinuance of business or bankruptcy Any such assertion of claims must be accompanied by the original sales receipt as the proof of purchase and time of installation of the System The assertion of the claim must occur within thirty 30 days from the date that the claim is identified The return of Parts may only occur after the written authorization of LG has been given OBTAINING WARRANTY PARTS amp ADDI TIONAL INFORMATION Customers who believe they have a justi fied claim covered by this Limited Warranty must immediately notify the authorized LG representative or contact directly by calling to 1 888 865 3026 or by writing to LG Electronics USA Inc Attn Commercial Air Conditioning War ranty Registration 11405 Old Roswell Road Alpharetta Georgia 30009 DISPUTE Except to the extent prohibited by appli cable law the Customer agrees she he will not bring any action regardless of form arising out of or in any way connected with this Limited Warranty more than one 1 year after the cause of action has occurred ARBI
71. SYSTEM ENGINEERING Due to our policy of continuous product innovation some specifications may change without notification MULTI NM Pipe Supports A properly installed pipe system should be adequately supported to avoid pipe sagging Sagging pipes become oil traps that could lead to equipment malfunction Field provided pipe supports should be designed to meet local codes If allowed by code use fiber straps or split ring hangers suspended from the ceiling on all thread rods Supports should never touch the pipe wall Insulate the pipe first Place a second layer of insulation over the pipe insulation jacket to prevent chafing and compression of the primary insulation within the confines of the support pipe clamp Pipe and insulation should be allowed to move linearly as pipe temperature changes Straight segments up to 3 4 inch OD should be supported at least every 5 feet or per local codes if more stringent Straight segments of 1 inch OD and larger copper pipe should be supported every 6 feet or per local codes if more stringent e A properly installed pipe system will have sufficient supports to keep pipes from sagging during the life of the system As necessary place supports closer for segments where potential sagging could occur Wherever the pipe changes direction place a hanger within 12 inches on one side and within 12 to 19 inches of the bend on the other side as shown in Figure 45 Support piping at indoor units as sh
72. TRATION The laws of the state of Georgia govern this Limited Warranty and all of its terms and conditions without giving effect to any principles of conflicts of laws All actions at law or in equity arising out of or relating to these terms and conditions shall be submit ted to confidential arbitration in Atlanta Georgia Arbitration under this Limited War ranty shall be conducted under the rules then prevailing of the American Arbitration Association The arbitrator s award shall be binding and may be entered as a judgment in any court of competent jurisdiction To the fullest extent permitted by applicable law no arbitration under this Limited Warranty shall be joined to an arbitration involving any other party subject to this Limited Warranty whether through class arbitration proceedings or otherwise SEVERABILITY If a part provision or section of this Limited Warranty or its application to any person or circumstance is held invalid void or unenforceable such holding shall not affect this Limited Warranty and all other parts provisions clauses or applications shall remain and to this end such other parts provisions clauses or applications of the Limited Warranty shall be treated as severable VALIDITY This Limited Warranty shall be valid from January 1 2011 and shall apply to all commercial MULTI V VRF Systems sold to specified Customers on or after this date LG holds the right to amend the provisions cl
73. Table 5 Summary Data Suspended and Surface Mounted Indoor Units Nominal Capacity Btu h Max ESP in wg Air Flow Rate Total Cooling Heating Fan Setting H M L Ceiling Suspended 18 VJ 19 100 21 500 565 495 424 j 24 VJ 24 200 27 300 636 566 495 Convertible Surface Mount f 09 VE 9 600 10 900 268 243 219 12 VE 12 300 13 600 325 268 244 Floor Standing without case 8 500 For all indoor units 208 230V 60Hz 1Ph Reference LG s Multi V Indoor Unit Engineering Manual for complete detailed engineering data and selection procedures Model shows nominal capacity and frame size designator Due to our policy of continuous product innovation some specifications may change without notification PRODUCT DATA 19 TWANVIN ONIMSSNIDNA LINN ONISNSGNOD did VIH SA SA INDIAS Product Data GENERAL DATA MULTI Y Indoor Units Controls and Options Table 6 Indoor Units Controls and Options Nominal Chassis Size Btu h Airflow 2 iq er O Controllers Filter io Dd lt O INDOOR UNIT TYPE Slim Convertible Bottom Return Ceiling Suspended Convertible Surface Mount Floor Mount Uncased p l ce gt e 2 ES amp gt N E a a OS A A o o Ducted Low Static Ducted Low Static Vertical Air Handler NJ Vertical Air Handler Floor Mount Cased 2 Way Cassette 4 Way Cassette 7 EN T RO E RO I Air supply outl
74. The fan speed is controlled using a microprocessor based direct digital con trol algorithm that provides a minimum of three pre programmed fan speeds in the Heating and Fan Only modes and four speeds in the Cooling mode Fan settings are high medium and low The fourth speed in the Cooling mode is a su per high setting that runs for 30 minutes at high fan speed A chaos wind setting provides random change in fan speed The fan speed algorithm provides a field selectable fixed or auto speed setting that changes fan speed based on the difference between controller set point and space temperature Air Filter Return air is filtered with a removable washable pre filter Access to the filter media is through a hinged spring clip screwless return air grille located on the bottom of the unit Airflow Guide Vanes The discharge opening has a single directional slot diffuser with an oscillat ing motorized guide vane designed to change the angle airflow is discharged The discharge range of motion is 40 in an up down direction with the capability of locking the valve in a fixed position Manually adjustable guide vanes are provided to set the airflow discharge direction from side to side Microprocessor Controls The unit is provided with an integrated microprocessor based controller The controller is capable of performing func tions necessary to operate the system without the use of a wall mounted 114 SPECIFICATIONS
75. Undercut doors Include ventilation grilles in doors Include the area above the ceiling as part of the return or supply air path USGB 2009 Green Building Design amp Construction Washington DC USGBC Staff Page 535 Amercian Society of Heating Refrigeration and Air Conditioning Engineers Inc ASHRAE 62 1 2010 sections 6 2 and 6 3 Due to our policy of continuous product innovation some specifications may change without notification U S DESIGN STANDARDS 97 TVANVIN ONIVIINIDNA LINN ONISNSGNOD did 1VIH SA 4 INDIAS U S Design Standards ASHRAE STANDARDS SUMMARY MULTI V ASHRAE Standard 62 1 2010 ASHRAE 62 1 2010 Ventilation for Acceptable Indoor Air Quality Over the past twenty years publications have documented that the occupant s well being productivity and comfort is significantly impacted if the building is not properly ventilated Providing proper ventilation air directly and significantly increases a building s overall energy consumption and operating costs In an effort to reduce medical and legal costs as well as the cost associated with personnel turnover occupant companies and human resource personnel today consider the lease premium associated with tempering and cleaning ventilation air relatively insignificant Standard 62 1 2010 is known as the Indoor Air Quality IAQ Performance Standard The standard documents key strategies for maintaining minimum IAQ including limiting the introduction of potential contami
76. Y Outdoor Air Indoor Unit Entering Air Dry Bulb Temperature F T ike 76c Pi wen Pr men Pi mBh Pi men 5 00 4 95 5 07 5 03 5 07 5 16 5 16 5 21 5 06 4 86 4 60 4 49 4 24 4 14 3 98 4 95 4 91 5 03 5 00 5 02 5 12 5 12 5 17 5 02 s mo sm ms ox ms ss 4 57 4 45 4 20 4 10 3 95 4 65 4 62 4 74 4 70 4 74 4 82 4 82 4 87 4 72 4 53 4 30 4 20 3 96 Rated with an equivalent piping length of 24 6 ft and no change in elevation between the indoor and outdoor unit MBh Net Capacity R410A 60 Hz A oo Ro MULTI V PERFORMANCE DATA Table 11b ARUNO47GS2 Heat Pump Nominal Heating Capacity Outdoor Air Indoor Unit Entering Air Dry Bulb Temperature F MBh Pl MBh Pl MBh PI MBh Pl MBh Pl MBh PI MBh PI MBh_ 41 1 Combination Ratio O 100 oo 15 0 20 0 25 0 0 4 100 30 0 4 wg 35 0 0 40 0 0 45 0 47 0 50 0 59 0 4 EN as ane 624 452 E aso 567 387 54 0 383 524 369 49 7 340 aa 3 12 5 4 EE EOE 5 EN 564 os 564 NUM E an EN NOM E 439 ME 430 497 4 05 ana 3 79 5 4 IVANVIA ONIMSSNIDNA LINN SNISNSGNOD dNNd 1WIH SA 4 4 FAREA Capacity rated using ISO 5151 Test Rating Standard for Non Ducted Heat Pumps Rated with an equivalent piping length of 24 6 ft and no change in elevation between the Heating mode stable operation is ensured when the o
77. a for vapor and liquid pipes terminating at indoor units tube 4 pcs tion for plugging tube 6 pcs All dimensions in inches Internal Diameter Toler ance 0 25 inch Due to our policy of continuous product innovation some specifications may change without notification CUT SHEET 83 CONTROLS Zone Controllers on page 251 Central Controllers on page 253 Integration Solutions on page 256 Control Products Accessories on page 257 Controls ZONE CONTROLLERS MULTI WV Simple Controller With Mode Selection Key Black PARCVCLOQ White PARCVCLOQW The standard simple controller allows control of indoor unit operation mode fan speed and temperature setpoint The controller is also available without mode button for systems under central control replac ing it with instantaneous room temperature display Features LED indicator for operating status e Child lock e Backlit e Group of up to 16 indoor units Unit operation ON Off e Multiple controllers per indoor unit or indoor unit e Temperature control F or C group e Instantaneous room temperature display Temperature sensor location Unit Controller Without Mode Selection Key e Cooling range F 64 86 Remote Sensor Black PARCHCA0Q e Heating range F 60 86 e Error code display during unit or system mal White PARCHCA0QW e Mode selection Fan Heat Cool Auto Dry function e Fan speed Low Med High Power Auto e 33 feet of communicatio
78. a level adjust the heating capacity for changes in air density Look up the appropriate altitude correction factor for a dry coil found in Table 18 Multiply the corrected heating capacity detailed in the LATS report for each indoor unit by the altitude cor rection factor selected Verify that the actual corrected heating capacity for each indoor unit is at least equal to the sum of the appropriate heating design day building load plus the ventilation loads if applicable for all spaces served by the indoor unit 48 SYSTEM ENGINEERING Due to our policy of continuous product innovation some specifications may change without notification MULTI NM Select the Outdoor Unit Table 13 Cataloged Ambient Air Operating Temperature Range Cooling Mode F DB Heating Mode F WB Multi V Mini 23 115 4 60 A Note Multi V Mini outdoor unit s may have to operate in weather conditions more extreme than a typical design day De sign days are the days of the year that either cooling or heating capacity is needed the most In light of this it may be prudent to size the outdoor unit considering the anticipated worst weather day conditions to ensure adequate capacity year round Begin the selection of the outdoor unit by selecting a size that meets the cooling requirements Then verify if the selected unit meets the heating capacity requirement Find the appropriate capacity table on pages 22 39 for the outdoor unit chosen Locate th
79. aces Where a refrigerating system or a part thereof is located in one or more enclosed occupied spaces that do not connect through permanent openings or HVAC ducts Where different stories and floor levels connect through an open atrium or mezzanine arrangement the volume used is determined by multiplying the floor area of the lowest space by 8 25 feet Ventilated Spaces Where a refrigerating system or a part thereof is located within an air handler an air distribution duct system or an occupied space served by a mechanical ventilation system the entire air distribution system shall be analyzed to determine the smallest volume area Closure Closures in the air distribution system shall be considered If one or more spaces of several arranged in paral lel can be closed off from the source of the refrigerant leak the volume s shall not be used in the calculation Closure exceptions include smoke and fire dampers or combinations thereof that shut in an emergency and are not associated with a refrigerant leak and dampers where airflow is never reduced below 10 of its maxi mum with the fan running Plenums The space above a suspended ceiling shall not be included in calculating the refrigerant quantity limit in the system unless such space is part of the air supply or return system Supply Return Ducts The volume of the supply and return ducts and plenums shall be included when calculating the refrigerant quantity limit in the system
80. ach Header fitting one for the liquid line and one for the vapor line as shown in Figure 42 See Refrigerant Pipe System In sulation on page 73 for pipe system insulation information Figure 42 Header Insulation and Pipe Detail Field supplied copper pipe a Ae A A a A A A Y p 211441141 1 a AA fae ee ears L AY fond nt 1 1 EII tags 11 th peta gy I 1 t 11r A eA hie ae S 2 A OA ty 4 A E VI E E E VA HARAN EN Field supplied copper pipe LG supplied header Due to our policy of continuous product innovation some specifications may change without notification ay Ae DS ee LG supplied insulation jacket MULTI NM Engineering for Future Indoor Units Commissioning in Stages Begin with the end in mind to avoid system downtime unneces sary costs and the replacement of installed pipe segments when adding subsequent indoor units and or changing the location or size of existing units after the system is initially designed and com missioned Complete the following at the same time the initially installed portion of the system is complete e Placement decisions for all future indoor units e Piping plan for future piping e Sizing of future pipe segments In these applications the future pipe design must be verified using LG s LATS Multi V software to confirm the pipe design complies with LG s design limitations after all future indoor un
81. age 96 for information on how to meet the requirements of ASHRAE Standard 15 and 34 5 To properly charge a Multi V Mini system it is imperative to know the as built physical length of each segment of the liquid line 4 Count the number of indoor units Group them by model type and nominal capacity Group indoor units by size as indicated in the description fields on lines 4 28 of Table 29 Record the quantity of units in each group on the appropriate lines Ne pistes mus ee nave MALUE coun of the types and 6 Ifthe outdoor unit is a nominal 36k record a negative 1 1 Ibs Pl of refrigerant pipe fittings used to build the system s liquid in tha Tot feid on line 26 ine Calculate the System Refrigerant Charge 1 Make a copy of Table 29 y 9 9 gt c na of A 7 Sum the Total column values on lines 1 31 and place in the Create an as built drawing of the system s liquid line or mark field labeled System Trim Charge up a tree mode piping diagram from LATS Multi V Document 7 the linear feet of straight pipe and the quantity and type of 8 Ifthe value of the trim charge is positive add refrigerant If each fitting by pipe diameter negative remove refrigerant 3 Calculate the total linear feet of liquid line tubing in the system 9 Add the Outdoor Unit Factory Charge to the Trim Charge This 76 SYSTEM ENGINEERING Record the values using lines 1 3 in Table 29 is the System Charge Record in the appropriate field
82. al Connections on page 81 Y Branch Kits on page 82 Header Kits on page 83 CUT SHEET Dimensional Data and Weights Figure 62 Unit Dimensions Legend Center of Gravity L Length Dimension End View Figure 63 Maintenance and Air Flow Clearances Airflow mo ae y IM Front View End View See Pipe amp Electrical Connections Cut Sheet A Note The arrows show the direction of airflow 8 7 _ EE A 4 Min Airflow Clearance 80 CUT SHEET 24 3 8 Bolt Diameter 1 2 typical of 4 ad 4 Min Airflow Clearance 12 Min Maintenance Clearance Compressor and control component access 24 Min Maintenance Clearance Due to our policy of continuous product innovation some specifications may change without notification Table 30 Unit Weight Information A Model Operating Ship Mounting Point Weights Point Weights AA AN moose ms aa B e 6 11 16 Image not to scale All dimensions 0 25 inches Consult NEC for required electrical clearances Figure 63 depicts the minimum airflow clearance data provided is for a single unit installation placed in an open area without overhangs or near other heat rejecting equipment Refer to Placement Considerations on page 54 or Clearance Re quirements on page 56 for minimum require ments for complex installation scenarios Power wiring cable size must comply with the ap plicable
83. al or central controller dis played diagnostic codes are specific alpha numeric and provide the service technician with a reason for the code displayed MULTI V MINI Condensate Lift Pump The indoor unit is provided with a factory installed and wired condensate lift pump capable of providing a minimum 27 5 inch lift from the bottom exterior surface of the unit casing The unit drain pan is provided with a secondary drain port plug allowing the pan to be drained for service The lift pump comes with a safety switch that will shut off indoor unit if condensate rises too high in the drain pan Indoor Units Ceiling Concealed Ducted High Static Slim Con vertible B1 B2 Casing The case is a low profile design with a maximum height of eight inches designed to mount concealed above the finished ceiling Fan discharge is front horizontal with a rear horizontal field convertible to a bottom return The unit is manufactured with coated metal Cold surfaces are cov ered with a polystyrene insulating material The case is provided with hanger brackets designed to support the unit weight on four corners Hanger brackets have pre punched holes designed to accept field supplied all thread rod hangers Fan Assembly and Control Indoor units have two Sirocco fans made of high strength ABS HT 700 polymeric resin Both fans are directly driven and mounted on a common shaft The fan motor is a brushless digitally controlled
84. and off DDOAS controls do not have to be interlocked with the Multi V system In lieu of installing localized smaller outside air treatment equipment throughout the building this method centralizes the ventilation outside air source making service and filter changes easier and less disruptive for the building occupants Indoor unit operation and performance will not be affected by the condition of outdoor air Third party demand control ventilation controls are more readily accommodated outdoor air unit and ceiling diffusers e N Ceiling Diffuser Multi V Ceiling Cas sette Indoor Unit Outdoor Air Unit ERV 44 SYSTEM ENGINEERING Due to our policy of continuous product innovation some specifications may change without notification a MULTI NM MINI BUILDING VENTILATION Method 2 Unconditioned Outdoor Air Non Ducted Natural Ventilation Natural ventilation devices such as operable windows or louvers may be used to ventilate the building when local code permits The open area of a window or the free area of a louver must meet the minimum percentage of the net occupied floor area A Note None Method 3 Unconditioned Outdoor Air Ducted to Indoor Units Untreated outdoor air is channeled through a duct system that is piped to the return air duct on concealed indoor units or to the chassis of 1 way and 4 way cassettes A Note Outside air may flow backward through the return air filter grille when the indoo
85. are purchased or installed Doing so may have a positive effect on job profit eliminate rework and may avoid unexpected necessary pipe changes before commissioning Layout Procedure When this procedure is complete the liquid line working drawing should contain the information for each pipe segment and others entities depicted in Figure 35 1 Choose the location of the indoor units and draw them on the building drawing 2 Choose the location of all Y Branch and Header fittings and add them to the drawings Verify that all fittings are positioned per the guideline limitations set forth in Y Branch Kits on page 63 and Header Kits on page 64 3 Plan the route for interconnecting piping Draw a one line depic tion of the pipe route chosen on the building drawings 4 Calculate the actual length of each pipe segment and note it on the drawing next to each segment 9 Using the data obtained while selecting the system components from the Equipment Selection Procedure on page 47 list the nominal cooling capacity next to each indoor unit on the drawing 60 SYSTEM ENGINEERING Due to our policy of continuous product innovation some specifications may change without notification MULTI NM MINI 6 Starting at the runout segment servicing the indoor unit located farthest from the outdoor unit note the connected nominal capacity of the indoor unit served by the pipe segment Record these values next to each segment on the
86. ased on the difference between controller set point and space temperature Air Filter Return air is filtered with a removable washable pre filter Access to the filter media is through a hinged spring clip screwless return air grille located on the front bottom of the unit Airflow Guide Vanes The discharge opening has a single direc tional slot diffuser with an oscillating motor ized guide vane designed to change the angle airflow is discharged The discharge range of motion is 40 in an up down direc tion with the capability of locking the vane in a fixed position Manually adjustable guide vanes are provided to set the airflow discharge direction from side to side Microprocessor Controls The unit is provided with an integrated microprocessor based controller The controller is capable of performing func tions necessary to operate the system with out the use of a wall mounted controller A temperature thermistor is factory mounted in the return air stream All unit operation parameters excluding the operating sched MECHANICAL SPECIFICATIONS Indoor Units Convertible Surface Mounted VE ule are stored in non volatile memory resident on the unit microprocessor Op erating schedules are stored in select models of the optional wall mounted local or central controller The field supplied communication cable between the indoor unit s and outdoor unit is to be a minimum of 18 AWG 2 conductor stranded an
87. ate indoor unit s Design cool ing and heating loads only if the ventilation air treatment system does not provide room neutral air Some models of Multi V indoor units are factory provided with or have accessories available that accommodate the direct connection of ventilation ductwork to the unit However there are product limitations and additional considerations that may need to be understood when using direct connection accessories For more information contact your LG applied equipment representative Go to www LG VRF com to find your representative and technical product information Due to our policy of continuous product innovation some specifications may change without notification EQUIPMENT SELECTION PROCEDURE ARUN 036 047 053 A Note In all cases LG recommends ducting pretreated room neutral ventilation air directly to the space When pretreated ventilation air is provided remember to de duct the ventilation airload s from the total load before sizing the indoor unit s Local codes of other profession al design guidelines such as ASHRAE 62 1 will dictate the volume of ventilation air required It may be prudent to oversize the dedicated outdoor air system considering there will be a few days of the year when weather conditions exceed the design conditions This will minimize the possibility of ventilation air condi tions causing the indoor unit s entering air temperature to fall outside the approved design tempe
88. ateway provides Table 40 BACnet Control Monitor arrepentir products and various brands of build ing automation systems to control and monitor up to 256 indoor units An embedded web server facilitates troubleshooting and remote diag este eee lll Tee hee whenever the building management system is offline Room Temperature A Note E O S 1 Must be communicated in degrees Celsius C Check Filter e 2 Only applies to indoor unit types with discharge Check Filter Reset e louvers 3 Room temperature value is reported in degrees Celsius C Due to our policy of continuous product innovation some specifications may change without notification CONTROLS 91 Controls CONTROL PRODUC TS ACCESSORIES MULTI V Remote Temperature Sensor PQRSTAO The remote sensor allows for remote temperature measurement In some applications such as high ceilings the unit mounted return air thermistor may not accurately represent the space temperature The thermistor sensor is provided with 50 feet of wiring and a plug for quick connection to the indoor unit control board The remote sensor is for use with ducted and ceiling cassette indoor units A Note Not for use with ArtCool Mirror or Wall Mounted indoor units ic Wired Remote Group Control Kit PZCWRCG3 i The optional group control cable and extension cable are required when grouping multiple indoor units with a single zone controller or multiple zone controllers Each indo
89. ation depends on the installer using best prac tices and the utmost care while assembling the piping system 5 8 2 1 825 3 41 2 1 42 1 4 1 0 3 81 1 A a Use adapters to assemble different sizes of pipe b Do not use flux soft solder or anti oxidant agents C Use a tubing cutter Do not use a hacksaw to cut pipe a 4 When brazing always use a dry nitrogen purge and maintain a Liquid Pipe 5 8 F 5 84 3 41 1 3 4 steady flow while brazing 5 When brazing use a 15 silver phosphorous copper brazing alloy i OD Pips dameterininchas such as Stay Silv 15 to avoid overheating and produce good flow Values in parenthesis indicate OD of pipe with insulation jacket 6 P h ej hile b U Diameter of pipe with insulation Thickness of pipe insulation is typical Actual required i rotect heat sensitive components whe orazing US a wet rag or a thickness may vary based on surrounding ambient conditions and should be calculated and Cool Gel type product when located near brazing Operations specified by the design engineer Liquid line with 3 8 thick insulation Liquid line with 1 2 thick insulation Liquid line with 3 4 thick insulation o PO oon A Figure 53 Typical arrangement of refrigerant pipe and cable s in a utility conduit Vapor Line Power Cable Liquid Line Pipe Sleeve Min to Gauge Communication Cable 72 SYSTEM ENGINEERING Due to our policy of continuous produ
90. auses or applications of this Limited Warranty from time to time without notice however such changes would not be retrospective LG Life s Good Variable Refrigerant Flow Air Cooled 3 0 4 4 Tons LG Electronics LG Commercial Air Conditioning 920 Sylvan Ave Englewood Cliffs NJ 07632 www Ig com us www Ig vrf com Document Number VRF EM BB 001 US 011M21 Supersedes New
91. ching maximizes the time that the indoor units remove moisture This ensures maximum comfort and delivers the industry s best indoor humidity levels Precision Load Matching Unlike traditional air conditioning control systems which use thermostatic controls to maintain room temperatures LG Multi V controls continuously vary the indoor unit fan speed and refrigerant flow indirectly providing lower and more consistent humidity levels in the conditioned space The longer the indoor coil temperature is below the dew point of the room in conjunction with air movement across the coil the space humidity level will vary little compared to technologies that cycle fans and compressors on and off multiple times per hour The outdoor unit responds by varying the com pressor speed and outdoor fan motors as needed to maintain system operating pressure As a result the Multi V system delivers precise space temperature control 12 PRODUCT DATA Heat Transfer Efficiency Fin Design All Multi V outdoor units are provided with large surface coils made of copper tubes with aluminum fins designed to maximize unit operating ef ficiency over a wide range of ambient conditions GoldFin Coating Standard from the factory every LG Multi V outdoor coil fin surface is coated with LG s exclu sive GoldFin anti corrosive protective coating designed to prevent natural surface corrosion of the aluminum fins This maintains heat transfer propert
92. controller A temperature thermistor is factory mounted in the return air stream All unit operation parameters exclud ing the operating schedule are stored in non volatile memory resident on the unit microprocessor Operating sched ules are stored in select models of the optional wall mounted local or central controller The field supplied communi cation cable between the indoor unit s and outdoor unit is to be a minimum of 18 AWG 2 conductor stranded and shielded cable RS485 terminated via screw terminals on the control boards The microprocessor control provides the following functions self diagnostics auto restart following power restoration test run and will operate the indoor unit using one of five operating modes 1 Auto Changeover 2 Heating 3 Cooling 4 Dry 5 Fan Only The Auto Changeover setting auto matically switched between Cooling and Heating modes based on room tempera ture conditions Heated or cooled air delivery is depen dant upon outdoor unit type and system operating mode In Heating mode the microprocessor control will activate the indoor unit when indoor room temperature falls below setpoint temperature and signals the outdoor unit to begin the heating cycle The indoor unit fan operation is delayed until coil pipe temperature reaches 76 F Significant airflow is generated when pipe temperature reaches 80 F The unit is equipped with an infrared receiver designed to communicat
93. crew terminals on the control boards The microprocessor control provides the follow ing functions self diagnostics auto restart following power restoration test run and will operate the indoor unit using one of five operating modes 1 Auto Changeover Heating Cooling Dry Fan Only of wh The Auto Changeover setting automatically switches between Cooling and Heating modes based on room temperature condi tions Heated or cooled air delivery is depen dant upon outdoor unit operating mode In Heating mode the microprocessor control will activate the indoor unit when indoor room temperature falls below set point temperature and signals the outdoor unit to begin heating cycle The indoor unit fan operation is delayed until coil pipe temperature reaches 76 F Significant airflow is generated when pipe temperature reaches 80 F In lieu of factory return air thermistor pluggable connection sockets on the microprocessor circuit board accom modate various models of wall mounted Due to our policy of continuous product innovation some specifications may change without notification local controllers and or a wall mounted remote temperature sensor The unit microprocessor is capable of accepting space temperature readings concurrently or individually from either 1 Wall mounted wired controller s 2 Factory mounted return air thermistor or the optional wall mounted wired remote temperature sensor A single
94. ct innovation some specifications may change without notification MULTI Y Refrigerant Pipe System Insulation The liquid and vapor lines must be insulated separately All refriger ant piping including Y Branch and Header fittings field provided isolation ball valves service valves elbows and other specialties must be thoroughly insulated using a closed cell insulation such as Armaflex or equivalent All joints must be glued with no air gaps In sulation material must fit snugly against the refrigeration pipe with no air space between the pipe and insulation material Insulation pass ing through pipe hangers inside conduit and or wall sleeves should not be compressed Protect insulation inside hangers and supports with a second layer of insulation All pipe insulation exposed to direct sun light and or deterioration producing elements should be covered with a PVC or aluminum vapor barrier jacket or alternatively placed in a weather resistant enclosure such as a pipe rack with a top cover See Figure 49 and Figure 50 on page 71 Due to our policy of continuous product innovation some specifications may change without notification PIPING DESIGN GUIDE The design engineer should perform calculations to determine if the factory supplied insulation jackets have sufficient thickness to meet local codes and avoid sweating at jobsite conditions Technical data on factory insulation can be found in the Cut Sheet section Y Branch Ki
95. ction factor by the altitude correction factor The result is the actual corrected cooling capacity of the outdoor unit after all potential correction fac tors are considered After applying the appropriate additional cooling mode correction factors to the outdoor unit verify the actual cooling capacity is at least equal to the total building load considering building diversity if applicable Next determine the outdoor unit s actual corrected heating capac ity Two correction factors may apply one for operating the outdoor unit with frost on the coil and one for altitude above sea level The impact of frost accumulation on the outdoor unit coil can be cal culated by LATS or manually by the system designer In certain Due to our policy of continuous product innovation some specifications may change without notification EQUIPMENT SELECTION PROCEDURE ARUN 036 047 053 weather conditions frost may form and accumulate on the air cooled outdoor unit coil Periodically the outdoor unit will defrost the coil automatically The timing between defrost periods is determined by the system s ability to achieve a target head pressure value While the coil is frosted the outdoor unit capacity is affected LATS will automatically apply a frost accumulation factor if the check box labeled Defrost Factor in the outdoor unit selection dialog box is marked The dialog box can be accessed by double clicking on the outdoor unit image If c
96. d full load cooling capability 52 SYSTEM ENGINEERING Due to our policy of continuous product innovation some specifications may change without notification MULTI NM MINI Conclusion It appears the design day load of 6 500 Btu h in each space cannot be satisfied with an indoor unit having a limited capacity of 4 290 Btu h while the low fan speed lock is invoked In addition the spaces will remain hot until the load in at least 5 spaces drops to 4 290 Btu h for a sustained period of time A Note For the building owner it is significant to understand that a VRF system designed with an excessive CR may have restrictive capability to cool or heat on the thermally critical days of the year when the demand for cooling or heating is high est For this example it will remain in this impaired operating state until at least 46 of the indoor units are satisfied resulting in the system s RUR dropping to 90 A Note Design conservatively Specify and verify that all VRF systems are designed using a CR between 50 and 130 and use LG Multi V This will elimi nate the possibility of ever having the indoor unit capacity reduced because the low fan speed lock algorithm was invoked MULTI V EQUIPMENT SELECTION PROCEDURE ARUN 036 047 053 Table 14 Outdoor Indoor Unit Matching Limitations Indoor Unit Cite to lk Sum of Indoor Unit Nominal Capacities Nominal Capacity Btu h Maximum Quantity Minimum Capacity Btu h 50
97. d shielded cable RS485 terminated via screw terminals on the control boards The microprocessor control provides the follow ing functions self diagnostics auto restart following power restoration test run and will operate the indoor unit using one of five operating modes 1 Auto Changeover Heating Cooling Dry Fan Only ao a 1 The Auto Changeover setting automatically switches between Cooling and Heating modes based on room temperature condi tions Heated or cooled air delivery is depen dant upon outdoor unit operating mode In Heating mode the microprocessor con trol will activate the indoor unit when indoor room temperature falls below setpoint temperature and signals the outdoor unit to begin heating cycle The indoor unit fan op eration is delayed until coil pipe tempera ture reaches 76 F Significant airflow is generated when pipe temperature reaches 80 F The unit is equipped with an infrared receiver designed to communicate with an LG hand held remote controller In lieu of factory return air thermistor pluggable con nection sockets on the microprocessor cir cuit board accommodate various models of wall mounted local controllers and or a wall mounted remote temperature sensor The unit microprocessor is capable of accepting space temperature readings concurrently or individually from either 1 Wall mounted wired controller s 2 Factory mounted return air thermistor or the optional wall moun
98. d and is manufactured by LG The frequency inverter is designed by LG and is capable of providing a modulation range from 25Hz 90Hz in Cooling mode and 29Hz 100Hz in Heating mode The compressor motor is suction gas cooled and has an acceptable voltage range of 10 of nameplate voltage The compres sor is equipped with a crankcase heater and back seated service valves External suction and discharge tempera ture and pressure sensors are provided to protect the compressor from damage caused by over under temperature or over under pressure conditions The compres sor is provided with a positive displace ment oil pump providing sufficient oil film on all bearing surfaces across the entire inverter modulation range The compres sor is factory charged with Polyvinylether PVE refrigeration oil having no hygro scopic properties Compressor bearings are Teflon coated The compressor is wrapped with a heat resistant sound at tenuating blanket and mounted on rubber isolation grommets Due to our policy of continuous product innovation some specifications may change without notification MULTI V MINI Outdoor Unit Coil Outdoor unit coils are a minimum of two rows 17 fins per inch and manufactured using copper tubes with mechanically bonded aluminum louvered fins Fin sur faces are coated with Gold Fin corrosion resistant hydrophilic silica gel coating Coils are pressure tested at a minimum of 991 psig Fans amp Mo
99. d provided Indoor Units Convertible Surface Mounted VE Casing The case is designed to mount against the ceiling surface in a horizontal discharge configuration or on a wall ina vertical discharge configuration When mounted against the ceiling surface the return air is from the bottom of the unit When mounted on a wall the return air is from the front surface of the unit The unit is manufactured using a coated met al frame covered with an off white ABS architectural polymeric resin exterior case Cold surfaces are covered with a coated polystyrene insulating material MULTI NV Fan Assembly and Control The unit has a single direct driven Sirocco fan made of high strength ABS HR 2407 polymeric resin The fan motor is a brush less digitally controlled BLDC design with permanently lubricated and sealed ball bearings The fan motor assembly is mounted in vibration attenuating rubber grommets The fan speed is controlled using a microprocessor based direct digital control algorithm that provides a minimum of three pre programmed fan speeds in the Heating and Fan Only modes and four speeds in the Cooling mode Fan settings are high medium and low The fourth speed in the Cooling mode is a super high setting that runs for 30 minutes at high fan speed A chaos wind setting provides random change in fan speed The fan speed algorithm provides a field selectable fixed or auto speed setting that changes fan speed b
100. day On these projects the designer must manually estimate the corrected cooling and heating capacity of the outdoor unit when specified ambient conditions are outside the cataloged range A Note To roughly estimate outdoor unit capacity at condi tions outside the cataloged ambient air operating tempera ture range manually extrapolate performance informa tion provided in the appropriate outdoor unit engineering manual In lieu of designing for extreme weather conditions beyond the cataloged temperature range consider limiting the maximum and or minimum temperature of the air around the Multi V Mini outdoor MULTI V MINI unit or consider a Multi V water cooled alternative These strategies are common on air cooled projects in northern climates to eliminate extreme over sizing of the outdoor unit s Limit the surrounding outdoor unit air temperature by providing a ventilated equipment enclosure equipped with an auxiliary heat source On heating days the auxiliary heat source will provide the building engineer the ability to temper and control the minimum air temperature surrounding the outdoor unit s On extremely cold days it may be more advantageous to operate the auxiliary heat ing equipment and limit the minimum ambient temperature in the enclosure in lieu of investing additional capital to install an extremely over sized and de rated Multi V outdoor unit The enclosure also eliminates the potential operational pr
101. des handling or replacement of Part s and the complete System 5 LG will not be responsible or liable for any and all costs such as but not limited to any parts labor supplies or refriger ant necessary to alter rework or modify the System to prepare the System for proper commissioning 6 This Limited Warranty shall not be en larged extended effected and no obli gation or liability shall be created by LG providing technical advice information service s applications suggestions or equipment modifications to any person or entity associated with the installation of the System LIMITED WARRANTY EXCLUSIONS AND DESIGN LIMITATIONS 1 A System sold and or installed outside the continental United States Alaska and Hawaii or removed from the location where it was originally installed 2 A System sold AS IS or WITH ALL FAULTS or consumables 3 A System that had a serial number or any Part s thereof altered defaced or removed 4 Charges related to the rental or pur chase of temporary cooling ventilating and or heating equipment 5 Any and all freight charges truck charges trip charges charges to pickup transport deliver and or install the System or any component or part of the System including costs to expedite shipments such as but not limited to air overnight and or courier charges o Damage and or failure caused by Sys tem misuse neglect or from a failure of the Customer to operate
102. drawing 7 At the branch or pipe segment upstream of the farthest Y Branch or Header fitting from the outdoor unit note the downstream connected nominal capacity of all indoor units served by the pipe segment Record these values next to the segment on the drawing Repeat the same procedure for each branch and main pipe segment woking your way up the liquid line back toward the outdoor unit for each leg of the piping system When completed all segments will be noted with the nominal capacity of the downstream indoor units served by each segment 8 Use Table 21 to select the correct pipe size for both the liquid and vapor lines Note the chosen line sizes next to each seg ment 9 Size Y Branch and Header fittings Refer to Cut Sheets for Y Branch Kits on page 82 and Header Kits on page 83 to determine the part number of each LG Y Branch and or Header based on the connected downstream nominal capacity served Record the part number next to each fitting 10 Calculate the equivalent pipe length in feet of the branch and main pipe segments Y Branch and Header equivalent lengths should be included with the upstream segment only Use equivalent pipe length data provided with purchased fittings If unavailable use the data provided in Table 21 Y Branch and Header equivalent lengths are found in the Cut Sheets on page 82 and page 83 and in Table 19 and Table 20 on page 59 Equivalent length values will be used to calculate the syst
103. e F T Ambient air temperature F 12 _ Inches to feet conversion 12 in ft Due to our policy of continuous product innovation some specifications may change without notification PIPING DESIGN GUIDE Refer to Table 25 and Table 26 for anticipated expansion distances for copper pipe 1 From Table 25 find the row corresponding with the actual length of the straight pipe segment 2 Estimate the minimum and maximum temperature of the pipe 3 In the column showing the minimum pipe temperature look up the anticipated expansion distance Do the same for the maxi mum pipe temperature 4 Calculate the difference in the two expansion distance values The resultant will be the anticipated change in pipe length For example A Multi V Mini heat pump system is installed and the design shows that there is a 260 ft straight segment of tubing between a Y Branch and an indoor unit In Heating mode this pipe transports hot gas vapor to the indoor units at 120 F In Cooling mode the same tube is a suction line returning refrigerant vapor to the outdoor unit at 40 F Look up the copper tubing expansion at each temperature and calculate the difference Vapor Line Transporting Hot Vapor 260 ft pipe at 120 F 3 64 in Transporting Suction Vapor 260 ft pipe at 40 F 1 04 in Anticipated change in length 3 64 in 1 04 in 2 60 in Liquid Line The liquid pipe temperature will not vary significantly Only the direc
104. e 113 Indoor Units Convertible Surface Mounted VE on page 114 Indoor Units Floor Standing Cased CE CF on page 115 Indoor Units Floor Mounted Uncased CEU CFU on page 116 Specifications 104 SPECIFICATIONS MECHANICAL SPECIFICATIONS VRF Multi V Mini Air Source Units ARUN 036 047 053 VRF Multi V Mini Air Source Units 036 047 053 General The LG Multi V Mini heat pump system consists of an outdoor unit one or more in door units integrated system controls and interconnecting field provided refrigerant pipe containing various fittings including Y Branch kits and Header kits supplied by LG LG components are manufactured in a facility that meets or exceeds Inter national Organization for Standardization ISO 9001 and 14001 The units are listed by Intertek ETL and bear the ETL listed mark Casing The outdoor unit case is constructed from 22 gauge coated metal Exterior panels are cleaned and finished with a weather resistant baked enamel finish An easily removable front corner panel is provided to allow access to major components and control devices Outdoor unit fans are covered with guards made of heavy gauge heavy duty polymeric resin The outdoor unit coil is protected with a heavy gauge steel wire guard finished with baked enamel Paint color is warm gray Refrigeration System The refrigeration system consists of a single refrigeration circuit and uses refrig e
105. e Sensor li aweag Strainer Seem o E p L Low Pressure Sensor gt ESS SSS SS SS SS SS Pressure Switch Y Branch Sub Cooler EEV gt gt High Pressure Sensor Outdoor Unit gt lt ca DUFan 40 PERFORMANCE DATA Due to our policy of continuous product innovation some specifications may change without notification a MULTI N UNIT REFRIGERANT FLOW DIAGRAMS Heating Cycle Diagram Figure 8 Heating Cycle Flow Diagram ARUN 036 047 053 Indoor Unit B l E 1 1 C i Mmaa i TS X X i O D NA i gt a no i E SS Charging Charging i t i oo gt i a ae E i eee Een la i i PA A I i reese i l E _ QD a D E Separato E HEE i yh o Inverter Comp O Accumulator Wi a AE ERN I E i l l l I I l A A o i E 1 Sub Cooler EEY Outdoor Unit Due to our policy of continuous product innovation some specifications may change without notification T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 X Xe y 1010900 H y Space Temperature Sensor IDU Refrigerant Entering Temperature Sensor IDU Refrigerant Leaving Temperature Sensor Outdoor Ambient Temperature Sensor Coil Pipe Temperature Sensor Suction Temperature Sensor Compressor Discharge Temperature Sensor Pipe Temperature Sensor Sub Cooler Outlet Temperature Sensor Sub Cooler
106. e indoor unit at 70 F dry bulb DB Power wiring cable is field provided and must applicable local codes per AHRI Standard 210 240 conditions and in and 59 F wet bulb WB and outdoor ambient comply with the applicable local and national Rated using non ducted indoor units accordance with DOE test procedures conditions of 47 F dry bulb DB and 43 F wet codes Rated 0 ft above sea level with 25 ft of refriger Nominal Cooling capacity rating obtained with bulb WB ant line per indoor unit and a 0 ft level difference air entering the indoor coil at 80 F dry bulb DB Unit is capable of operating outside the operating between outdoor and indoor units All capacities and 67 F wet bulb WB and outdoor ambient range temperature limitations See Select the 14 PRODUCT DATA Due to our policy of continuous product innovation some specifications may change without notification MULTI N GENERAL DATA Outdoor Units Table 1b General Data Outdoor Units continued from Table 1a 3 0 Ton 4 0 Ton 4 4 Ton ARUNO36GS2 ARUN047GS2 ARUN053GS2 Heat Exchanger Copper Tube Aluminum Fin Copper Tube Aluminum Fin Copper Tube Aluminum Fin GoldFin Hydrophilic GoldFin Hydrophilic ii oe Refer to Pipe Design Parameters on page 59 The factory s refrigerant charge is sufficient when software or manually using the worksheet on and Piping Design Guide on page 63 for cor line set length does not exceed 25 ft page 77 System must be
107. e is between 23 F and 115 F indoor and outdoor unit Rapid cooling operation is stable at indoor temperatures up to 80 F DB MBh Net Capacity Power Input PI in kW and includes compressor s and outdoor fan motor s R410A 60 Hz 26 PERFORMANCE DATA Due to our policy of continuous product innovation some specifications may change without notification MULTI V PERFORMANCE DATA Cooling Capacity 4 0 Ton Table 8c ARUNO47GS2 Heat Pump Nominal Cooling Capacity Outdoor Indoor Unit Entering Air Wet Bulb Temperature F Combination ay To Ratio l N oo N F DB MBh PI MBh PI MBh PI MBh PIi MBh PI MBh PI MBh PI o mt o a 119 wo 18 s 182 as 17 we 1 432 200 o 214 14 268 12 301 143 335 162 375 181 398 19 432 214 ie o a 1 ss 14 ut 17 ss 198 ars 221 ss 20 32 on 21 1 268 175 301 205 335 237 375 273 398 297 432 336 s e oe a o O O EZ O IZ O E AA pp tes os 29 103 258 117 287 132 321 147 341 158 370 174 e ICI IRC E EI e E O EE E II IT E E o e o 2s 116 258 1 m7 187 21 10 a1 198 so 21 wo e 113 9 14 se 167 r 19 1 2m ar 2 o on 23 158 os3 191 ose 215 oz 239 oss 268 09 284 106 308 119 ao 158 os 191 os 215 0o79 239 o9 268 102 284 10
108. e temperatures may occur If the RUR exceeds 130 the system will either not run at all or will run with limited heating or cooling capacity The mode depends on what model of outdoor unit is selected and the current ambient air conditions Find the nominal capacity information for indoor units Table 4 Table 5 and outdoor units Table 7 Table 12 For example A VRF system has an outdoor unit with a nominal capacity of C and has four connected indoor units having nominal capacity ratings of W X Y and Z respectively but indoor unit X has been turned off at the zone controller and indoor unit Y is thermally satisfied and is not calling for cooling or heating The RUR for this system would be RUR x 100 2 10 A Note It is impossible to predict if and when each zone controller will initiate or remove a call for cooling or heating on a Multi V system Therefore the only way to ensure the system will not operate with an RUR of less than 10 is to manually turn selected indoor units off at the zone controller or disable them using an LG central controller device or through the building automation system Summary After LATS has generated an error free output file and all system checks are completed the indoor and outdoor components should be properly sized and the system s performance has been optimized The Multi V Mini design is now complete At any time if further design assistance is needed for a unique ap plica
109. e total and sensible cooling capacity as well as the heating capacity at the specified ambient design conditions When design outdoor ambient conditions are outside the cataloged air cooled outdoor unit operating range the net refrigeration effect capacity delivered to the indoor units cannot be guaranteed Under these conditions the possibility exists that the liquid injection valve or hot gas bypass valve in the outdoor unit may be open When open the outdoor unit will sacrifice capacity to maintain operational Stability As a result the outdoor unit s net refrigeration effect avail able for use by the indoor units will be slightly reduced under certain extreme ambient air conditions Additionally when the designer provides the LATS software with outdoor ambient air design conditions that are above or below the cataloged operational temperature range the software will override the designers specified conditions and size the indoor and outdoor units and pipe system using the maximum or minimum cataloged ambient air operating temperature Also it is important to know that the report generated by LATS xls format will reflect the outdoor ambient air conditions the designer provides but the indoor and outdoor unit s cooling and heating cor rected capacities calculated and shown in the report will be based on the cataloged ambient air operating temperature limits of 4 F for the heating design day and 115 F for the cooling design
110. e vanes designed to change the angle airflow is discharged Discharge range of motion is 40 in an up down direction The control algorithm pro vides the capability of locking guide vanes in a field adjusted fixed position Microprocessor Controls The unit is provided with an integrated microprocessor controller capable of per forming functions necessary to operate the system without the use of a wall mounted controller A temperature thermistor is factory mounted in the return air stream All unit operation parameters excluding the units operating schedule are stored in non volatile memory resident on the unit microprocessor Operating schedules are stored in select models of the optional wall mounted local or central controller The field supplied communication cable between the indoor unit s and outdoor unit is to be a minimum of 18 AWG 2 conductor stranded and shielded cable RS485 terminated via screw terminals on the control boards The microprocessor control provides the following functions self diagnostics auto restart following power restoration test run and will operate the indoor unit using one of five operating modes Auto Changeover Heating Cooling Dry Fan Only a A eS The Auto Changeover setting automatically switches control of the indoor unit between Cooling and Heating modes based on space temperature conditions Heated or cooled air delivery is depen dant upon outdoor unit operatin
111. e with an LG hand held remote controller Pluggable connection sockets on the microproces sor circuit board accommodate various models of wall mounted local controllers and or a wall mounted remote tempera ture sensor The unit microprocessor is capable of accepting space temperature Due to our policy of continuous product innovation some specifications may change without notification MULTI V readings concurrently or individually from either 1 Wall mounted wired controller s 2 Factory mounted return air thermistor or the optional wall mounted wired remote temperature sensor A single indoor unit has the capability of being controlled by up to two local wired controllers The microprocessor controls space temperature using the value pro vided by the temperature sensor sensing a space temperature that is farthest away from the temperature set point The microprocessor control provides a Cooling mode test cycle that oper ates the unit in full Cooling mode for 18 minutes without regard to space temperature If the system is provided with an optional wall mounted or central controller displayed diagnostic codes are specific alpha numeric and provide the service technician with a reason for the code displayed Handling Condensate The unit is designed for gravity draining of condensate LG provides a factory insulated flexible drain hose If con densate lift oumps are needed for the application they are to be fiel
112. ear and side Figure 23 Single Unit high front and wall and low front wall with building pe magne rear walls with building overhang and overhang and no side walls no side walls Min 47 56 SYSTEM ENGINEERING Due to our policy of continuous product innovation some specifications may change without notification MULTI V CLEARANCE REQUIREMENTS Outdoor Unit Minimum Clearance Figure 25 Side by Side high rear Figure 26 Side by Side high rear and Legend and side walls with building overhang front walls with building overhang LR Rear wall height LF Front wall height H Unit height Min U A Note Installation clearances must comply with local building codes All figures not to scale Figure 27 Single Row Units high rear Figure 28 Side by Side high front Figure 29 Side by Side high rear wall wall and low front wall with no side walls or wall with building overhang and no and low front wall with no side walls overhang side or rear walls Figure 30 Double Row Units low rear and Figure 31 Side by Side high front and Figure 32 Side by Side high rear front walls with no side walls or overhang rear walls with no side walls wall and low front wall with building overhang and no side walls Due to our policy of continuous product innovation some specifications may change without notification SYSTEM ENGINEERING 97 TWNNVI ONIYZANIDNE LINN ONISNSGNOD did 1VIH SA SA FAREM system Enginee
113. ed branch fittings are not permitted inch 82 CUT SHEET Due to our policy of continuous product innovation some specifications may change without notification CUT SHEET Header Kits Figure 75 4 Port Header pipe connections Figure 76 4 Port Header dimensions Nominal Capacity Range Model Fitting Capacity Port Capacity ARBL054 lt 54 600 connected capacity lt 48 600 per port ARBL057 lt 76 400 connected capacity lt 48 400 per port ARBL104 lt 160 400 connected capacity lt 76 400 per port ARBL107 lt 160 400 connected capacity lt 76 400 per port Values expressed in BTUs Fitting Properties Design Pressure 551 psig Insulation Jacket Properties Table 37 Header Dimensions in it ino AE ef ee pe pe a ARBLO54 NECE AE AN PUN EE AD a Nn KAI A A ARBLO57 me branch a ARBL104 init sme eae eae IC IC wee Wore vpo sane emm eso 0 1 em emm ARBL107 aL Table 38 Header Connection Diameters in Port Identifier Header Type po Jo a 4 8 6 AAA ss aga E E S S EE Vapor o os Ft w y s e o A Header is a pipe that serves as a central Shipped with plugging tubes 1 4 inch 2 each 1 2 Shipped with plugging tubes 1 4 inch 2 each 1 2 All Headers are shipped with insulation one each connection for multiple runout pipe segments inch 2 each Shipped with Insulation for plugging inch 2 each 3 5 2 each a with Insul
114. elevating grille control algorithm accepts up down and stop con trol commands from either a wall mounted or the lift remote controller The algorithm does not permit the lowering of the grille while the indoor unit fan is operating The pair of winch controllers work in unison to keep the return air grille level during lift and descent operations and will automatically stop the descent of the return air grille filter if contact is made with any obstacle Fan Assembly and Control The indoor unit has a single direct drive turbo fan The fan wheel is made of high strength ABS HT 700 polymeric resin The fan motor is a brushless digitally controlled BLDC design with permanently lubricated and sealed ball bearings The fan motor assembly is mounted in vibration attenuat ing rubber grommets The fan speed is controlled using a microprocessor based direct digital control algorithm that provides a minimum of four pre programmed fan speeds in the Heating and Fan Only modes and five speeds in the Cooling mode Fan settings are super high high medium and low Each setting can be field adjusted from the factory speed setting RPM ESP MECHANICAL SPECIFICATIONS Indoor Units 4 Way Ceiling Cassette TM TN TP TQ TR to compensate for a limited amount of additional resistance to airflow caused by field connected ductwork or other airflow restricting devices The fifth speed in the Cooling mode is a fan power cooling cycle that
115. ely to impact the Multi V system USGB 2009 Green Building Design amp Construction Washington DC USGBC Staff Page 535 Amercian Society of Heating Refrigeration and Air Conditioning Engineers Inc ASHRAE 62 1 2010 sections 6 2 and 6 3 98 U S DESIGN STANDARDS Due to our policy of continuous product innovation some specifications may change without notification MULTI V ASHRAE STANDARDS SUMMARY ASHRAE Standard 62 1 2010 Method 2 Coupled Pre Treated Ventilation Air From a common outside air inlet filter and pre treat the air temperature to room neutral conditions and duct the ventilation air to the ceiling cassette or recessed ducted Multi V indoor units Multi V indoor units are designed for quiet operation and room air recirculation Inherently quiet fans cannot produce a significant amount of static pressure Thus Multi V indoor units do not have the capability to draw ventilation air Ventilation air must be pushed to the indoor unit Also in the event the ventilation air is outside the indoor unit design parameters and the return and ventila tion air streams fail to mix properly before entering the indoor unit coil air stratification may occur causing erratic behavior of the Multi V indoor unit Operationally the designer must consider many what if failure scenarios and understand the impact on building HVAC system operations Negative building pressure conditions may impact the indoor unit fan s ab
116. em refrigerant charge Dh Verify the actual and or equivalent pipe length complies with the limitations listed in Table 20 If the limitations are exceeded ei ther reroute the pipe or change the location of selected Y Branch fittings Header fittings and or indoor unit locations so the design conforms with all limitations 12 Verify the manually sized pipe design is acceptable using LATS Multi V Using the LATS tree mode modeling option enter the actual pipe length of each pipe segment Account for the ad ditional pressure drop created by elbows by double clicking on the segment length text in LATS Multi V In the dialog box enter the elbow count 13 After entering all necessary information into LATS click on the Auto Pipe button on the left followed by the System Check button located under the Auto Pipe button If no dialog boxes pop up indicating an error and none of the entities on the tree mode diagram have a red box around or along them the pipe design is acceptable and the layout work is complete If errors were indicated modify the pipe design as needed For assis tance contact the applied product representative in your area MULTI N PIPE LAYOUT PROCEDURE Table 21 Pipe Segment Sizing All pipe dimensions are inches OD Main Pipe Segment Branch and Run Out Segments Model lt 295 feet equivalent 2 295 feet equivalent lt 19 1 MBh gt 19 1 MBh lt 54 6 MBh gt 54 6 MBh lt 68 9 MB
117. entral controller displayed diagnostic codes are specific alpha numeric and provide the service technician with the reason for the code displayed Condensate Lift Pump The indoor unit is provided with a factory installed and wired condensate lift pump capable of providing a minimum 27 5 inch lift from the bottom surface of the unit The lift pump comes with a safety switch that Due to our policy of continuous product innovation some specifications may change without notification MULTI NM will shut off the indoor unit if condensate rises too high in the drain pan Indoor Units 4 Way Ceiling Cassette TM TN TP TQ TR Casing The case is designed to mount recessed in the ceiling and has a surface mounted concentric grille on the bottom of the unit The unit case is manufactured with coated metal Cold surfaces are covered with a coated polystyrene insulating mate rial The case is provided with metal ears designed to support the unit weight on four corners Ears have pre punched holes designed to accept field supplied all thread rod hangers Ventilation Air TQ TR Chassis The case has a factory designated cutout for the connection of a field supplied outside air duct An optional flange kit is available from LG TM TN TP Chassis The case has a factory designated cutout for the connection of a field supplied outside air duct LG offers two flange kit options depending on the volume of venti lat
118. equency Hz Octave Band Center Frequency Hz 63 125 250 500 1000 2000 4000 8000 Octave Band Center Frequency Hz All data is measured in accordance with Industry Standard ARI 880 98 Measurements are taken 4 9 ft above the finished floor and a distance of 3 3 ft from the face of the fan discharge with no attenuation 16 PRODUCT DATA Due to our policy of continuous product innovation some specifications may change without notification MULTI N GENERAL DATA Indoor Units Table 4a Summary Data Wall and Ceiling Flush Mounted Indoor Units Nominal Capacity Btu h Maximum External Unit l Total Cooling Static Pressure in wg Air Flow Rate CFM H M L 10 900 Wall Mount ART COOL Mirror 12 SE 13 600 21 600 24 88 27 300 8500 Wall Mounted Standard Finish cs 13 600 19 SE 17 100 21 600 27 300 Ceiling Cassette 1 Way 07 TJ 7 500 8 500 E 09 TJ 9 600 10 900 12 TJ 12 300 13 600 Ceiling Cassette 2 Way 18 TL 19 100 21 500 05 TR 5 500 6 100 Airflow data is presented with fan speed set at the factory setting Reference LG s Multi V Indoor Unit Engineering Manual for more detailed engineering data All indoor units are 208 230V 60Hz 1Ph Model shows nominal capacity MBh and frame size designator Due to our policy of continuous product innovation some specifications may change without notification 494 459 353 265 229 212 265 229 212 283 247 212 459 424 353 265 247 212 TQ
119. erature is between 4 F and 60 F indoor and outdoor unit Power Input PI in kW and includes compressor s and outdoor fan motor s MBh Net Capacity R410A 60 Hz Due to our policy of continuous product innovation some specifications may change without notification PERFORMANCE DATA 3 TWANVI ONIMASNIDNA LINN DNISNIONO9 dNNd 1VIH SA 4 4 INDIA Performance Data PERFORMANCE DATA MULTI Y Heating Capacity 3 0 Ton Table 10b ARUNO36GS2 Heat Pump Nominal Heating Capacity Combination Ratio 100 Capacity rated using ISO 5151 Test Rating Standard for Non Ducted Heat Pumps Outdoor Air Indoor Unit Entering Air Dry Bulb Temperature F DB WB MBh Pl MBh Pl MBh PI MBh Pl MBh Pi MBh PI MBh PI MBh PI aa es moo a mo oe mo ms mo am ms am ms om ms om oo eo ao ame oo oe o sos me sos we am we am me am moo an wo so 59 am wr am w2 ow ai am ao 2m or om 091 22 m7 20 o a ms am mor om mo m ze oor me a ma am mo am ma om Cos oo as ao wo ao xo 9 wo om mo az 2o am m9 an mo oor Cm so 2 az we am ae 2m a7 2m me 2m wr e us 2m mo 200 aa se me oo mo om a om we am ma om ms om ma am oo eo me so wo ao wo oe mo sm ms am we am ms om 03 om wo soo 1
120. erifies the operational condition of system sensors and thermistors A refriger ant auto trim charge algorithm assists the installer with properly charging the system A power conditioning circuit is provided and designed to protect the unit s inverter compressor and outdoor unit fan motors from phase failure phase reversal sense an under voltage or over voltage condition and to prevent transmission of power irregu larities to the supply power source A snow throw algorithm is provided designed to reduce snow buildup on the discharge side louvers grille at regular intervals MECHANICAL SPECIFICATIONS Indoor Units Wall Mounted SE S5 S8 All Indoor Units Indoor Units General All LG indoor units are factory assembled wired piped and provided with an inter nally factory mounted electronic expansion valve EEV control circuit board fan and motor Each is designed to operate using 208 230 60 1 power with voltage vari ances of 10 The refrigeration circuit is pressure tested at the factory and shipped with a holding charge of dry nitrogen gas Each unit is provided with a factory installed nonmetallic condensate drain pan With the exception of the vertical horizontal air handler an insulated flexible condensate drain hose is provided to connect the unit drain pan nipple to a field provided conden sate drain pipe Indoor Unit Coil Indoor unit coils are a minimum of two rows and are composed of copper tubes wi
121. ethods in conjunction with Multi V variable refrigerant flow equipment Multi V indoor units are designed for quiet operation and room air recirculation Inherently quiet fans cannot produce a significant amount of static pressure Thus Multi V indoor units do not have the capability to draw ventilation air Ventilation air must be pushed to the indoor unit In all designs the outside air must be introduced using a separate fan that is specifically designed for the task There are three methods to mechanically introduce outside air into individually occupied areas and rooms When considering which method to use the designer should choose a design that minimizes potential maintenance costs and operational problems Method 1 Decoupled Ventilation Air This is the preferred method to use with all LG air conditioning products From a common outside air inlet filter and pre treat the air temperature to room neutral conditions and duct the ventilation air to the ceiling or wall registers in each breathing zone Use this method when cost and operational problems are a priority It can be used in all applications and in conjunction with any type of Multi V indoor unit When using Method 1 and the outside air pre treatment device experiences component failure due to filtering heating or cooling the occupant will readily notice the resulting untreated air and can notify the building engineer of the problem More importantly the failure is less lik
122. ets 24 i 1 al y Airflow direction left right os auto 1 t Auto airflow direction up down y Fan speed Heating mode Fan speed Cooling mode Fan speed fan mode Chaos swing random louver swing ab o manual manu Auto clean coil dry Group control Requires the use of one Group Control Cable Kit PZCWRCG3 for every ad ditional indoor unit Simple controller with mode Simple contolerwihoutmode o o o Wireless hand held controller olofo Condensatelt o Vean YSN Side branch ducing Standard O Altoelevationgrile a S O ME deS So Suction grle ooo d d S S o Suctioncanvas o d S o AuxHeatkit Oo N A N Sx a lt EN lt E a a lt ES lt EA 2 w w ie A 2 y al oe N Is oo N 3 2 za lt ES En ee 2 2 lt lt je 2 2 w d o gt N 2 a O 2a ee ee lt 2 SS Bc 2 w co oS N 2 2 23 za lt E a 2 za lt Ea lt E lt 2 w w ow ME IN oOo oo 2 2 gt Pu e_ eR lt EA ES lt E 2 w w w gt tn Oo 2 ea ES lt ER a E 2a lt ES ee ee 2a 9 PA Be A e A ea EN EN a 2 2a lt ES EA e 2 2 w ejj 2 RE N D 1 Requires 7 day programmable zone controller 3 Branch location and static pressure requirements app 6 Heat pump or cooling only Y Standard feature 2 Optional ventilation kit PTVK430 or PTVK420 Tempera 4 Requires standard grille 7
123. g equipment in the state where the System resides b installed the System in accordance with i instructions and guidelines set forth in installation operation maintenance and engineering publications made available by LG ii software based design programs made available by LG iii local and state law v applicable building codes and per mits and iv good trade practices LIMITED WARRANTY PERIOD 1 STANDARD ONE YEAR PARTS WAR RANTY FOR A QUALIFIED SYSTEM The Part s are warranted for a period of one 1 year period beginning on the date of original installation by the end use purchaser or 18 months from the date of manufacture shown on the System nameplate label whichever occurs first 2 EXTENDED PARTS WARRANTY FOR A SYSTEM INSTALLED BY A CONTRAC TOR WHO HAS SUCCESSFULLY COMPLETED LG SERVICE TRAINING COURSES WITH A COMPLETE COMMIS SIONING REPORT APPROVED BY LG 2 1ADDITIONAL ONE 1 YEAR PARTS WARRANTY The Part s are war ranted for an additional one 1 year period during the second 2nd year after the date of original installation or 30 months from the date manufac ture shown on the equipment name plate label whichever occurs first 2 2ADDITIONAL FIVE 5 YEAR COM PRESSOR PART WARRANTY The Compressor part is warranted for an additional five 5 year period from the second 2nd through the sixth 6th year after the date of original installation or 30 months from the date of manufacture show
124. g mode In Heating mode the microprocessor control will activate indoor unit operation when the indoor room temperature falls below setpoint temperature At which point a signal is sent to the outdoor unit to begin the heating cycle The indoor unit fan operation is delayed until coil pipe temperature reaches 76 F Significant airflow is generated when pipe temperature reaches 80 F The unit is equipped with an infrared receiver designed to communicate with an LG hand held remote controller In lieu of wireless remote or factory return air thermistor pluggable sockets on the microprocessor circuit board accommo date various models of wall mounted local controllers and or wall mounted tempera ture sensors The unit microprocessor is capable of accepting space temperature readings concurrently or individually from either 1 Wall mounted wired controller s 2 Factory mounted return air thermistor or the optional wall mounted wired remote temperature sensor A single indoor unit has the capability of being controlled by up to two local wired controllers The microprocessor controls space temperature using the value pro vided by the temperature sensor sensing a space temperature that is farthest away from the temperature set point The microprocessor control provides a Cooling mode test cycle that operates the unit for 18 minutes without regard to space temperature If the system is provided with an optional wall mounted or c
125. gement refrigerant pipe and cable of refrigerant pipe and cables using a multi tier tray system A Power Cable E Power Cable B Liquid Line F Control Wiring Vapor Line Refrigerant Piping Covered Pip Pipe rack with cover amp Cable Tray Min 8 Handling Obstacles When an obstacle such as an l Beam or Concrete T is in the path of the planned refrigerant pipe run it is best practice to route the pipe over the obstacle If adequate space is not available to route the insulated pipe over the obstacle route the pipe under the obstacle In ei ther case it is imperative the horizontal section of pipe above or below the obstacle be a minimum of 3 times greater than the longest vertical rise or fall distance Figure 51 Installing piping above and below an obstacle l l l Eds pe a Above an obstacle b Below an obstacle Due to our policy of continuous product innovation some specifications may change without notification SYSTEM ENGINEERING 71 TWNNVI ONIYSANIDNE LINN SNISNSGNOD did 1VIH SA 4 FAREMA System Engineering PIPING DESIGN GUIDE MULTI N Pipe Sleeves and Wall Penetrations No Pipe Size Substitutions LG requires that all pipe penetrations through walls and floors Use only the pipe size selected by LATS Multi V software See LATS must be properly insulated Route pipe through a wall using an Multi V on page 58 Installing a different size than specified by LATS appropriately sized wall slee
126. h downstream capacity downstream capacity downstream capacity moe e mws e uw 6 CC a EC CO ACI ICI ICI ICI CI CI IC Select the equivalent length of the longest pipe run between the outdoor unit and the furthest indoor unit Capacity MBh The sum of the nominal capacity of all connected indoor units served by the pipe segment 3 If the sum of the nominal cooling capacity of all connected indoor units served by a branch or run out segment is greater than the capacity of the outdoor unit size the pipe segment based on the outdoor unit nominal capacity NO CL Due to our policy of continuous product innovation some specifications may change without notification SYSTEM ENGINEERING 61 TWNNVI ONIYSANIDNE LINN SNISNSGNOD did 1VIH SA 4 FAREM PIPE LAYOUT PROCEDURE MULTI V MINI Figure 35 Typical System Drawing Showing a Liquid Line Layout l Main The pipe segment between the out door unit and the first Y Branch or Header kit pa Branch A segment of pipe between two _ N Lc i Y Branches or a Y Branch and a Header kit N a me Run out The segment of pipe connecting vr ARNUO73R2 E s 7 Jh ip A Cap here i EE ett 4 Way Cassette AY Ha Pooling 7 5 MBR Full Port Ball Valve Ani Ae ra Heating 8 5 MBh i eo Install on both liquid and vapor lines O Run outR1 d Lineaydistance 35 feet Equivale
127. hecked the corrected outdoor unit ca pacity provided by the LATS report and displayed on the tree mode piping diagram will be automatically adjusted for frost accumulation To manually apply the frost accumulation factor multiply the outdoor unit s manually calculated heating capacity or corrected heating capacity reported in LATS verify the Defrost Factor check box was not marked by the appropriate frost accumulation factor found in Table 17 on page 53 If the Multi V Mini system will be installed at a significant elevation above sea level apply the frost accumulation factor if necessary to the corrected Heating capacity and then multiply the resultant by the appropriate altitude correction factor found in Table 18 Choose an altitude correction factor for either a wet or dry coil considering the ambient air conditions on the heating design day at the building s location After applying the applicable heating correction factors verify the outdoor unit actual corrected heating capacity is at least equal to the sum of the peak heating load for all spaces and or thermal zones served by the system System Sizing Checks Calculate the Corrected Capacity Ratio CCR The system s CCR is defined as the building total load divided by the outdoor unit corrected capacity after all applicable correction factors are applied Calculate this ratio for both the cooling and heating design days Total Cooling Block Load COR o Actual C
128. high strength ABS HT 700 polymeric resin The fan shaft is directly driven by a single digitally controlled inverter fan motor 18 24 MBh The unit has two independent fan assem blies consisting of two motors and four fans Each assembly consists of two Siroc co fans made of high strength ABS HT 700 polymeric resin Each pair of fans are mounted on a common shaft and driven directly by a single digitally controlled inverter motor Fan Motors The fan motors are a brushless digitally controlled BLDC design with permanently lubricated and sealed ball bearings The fan motor assembly is mounted in vibra tion attenuating rubber grommets The fan speed is controlled using a microproces sor based direct digital control algorithm that provides a minimum of three pre programmed fan speeds Fan settings are high medium and low Each setting can be field adjusted from the factory setting RPM ESP to compensate for a limited amount of additional resistance to airflow caused by field provided airflow restricting devices The fan speed algorithm provides a field selectable fixed or auto speed set ting that adjusts fan speed based on the difference between controller set point and space temperature Air Filter Return air is filtered using two removable washable filters on the 7 15 MBh models and three removable washable filters on the 18 24 MBh models Access to the filter is from the return air toe slot located on the bottom
129. hite ABS architectural poly meric resin exterior case Cold surfaces are covered with a coated polystyrene insulating material Flip open controller access doors cover the controller mounting bays located on both ends of the top panel A polymeric resin coated metal safety grille is provided behind the removable filters located in the toe space to prevent reach access to the fan wheel SPECIFICATIONS 115 TVNNVIN ONINSSNIDNA LINN ONISNSGNOD did 1VIH SA 42 VIDAS Specifications 116 SPECIFICATIONS MECHANICAL SPECIFICATIONS Indoor Units Convertible Surface Mounted VE Fan Assembly and Control 7 15 MBh The unit has three Sirocco fans mounted on a common shaft and made of high strength ABS HT 700 polymeric resin The fan shaft is directly driven by a single digitally controlled inverter fan motor 18 24 MBh The unit has two independent fan as semblies consisting of two motors and four fans Each assembly consists of two Sirocco fans made of high strength ABS HT 700 polymeric resin Each pair of fans are mounted on a common shaft and driven directly by a single digitally controlled inverter motor Fan Motors The fan motors are a brushless digitally controlled BLDC design with permanently lubricated and sealed ball bearings The fan motor assembly is mounted in vibra tion attenuating rubber grommets The fan speed is controlled using a microproces sor based direct digital control algorithm that provides a
130. ies of the coil for an extended time A hydrophilic coating is applied to the outdoor unit coil fin surface over the GoldFin coating This coating enhances the development of heavier water droplets gathering on the fin surface As a result the droplets roll off the fin surfaces delay ing the point when frost forms on the coil surface during heating operations This coating also makes it possible to easily clean the outdoor unit coil using mild soap Simplified Installation Cooling and heating systems that use the LG Multi V simplify and reduce the mechanical and control system design time The designer no longer has to be concerned with interconnecting chilled and condenser water piping air distribu tion duct systems matching and selecting chill ers towers pumps coils fans air handlers or Variable Air Volume VAV boxes System integration with existing building manage ment systems has never been easier Since all of the Multi V system components are engineered and provided by LG the system components and controls come pre engineered and do not need any custom programming from third party contractors Due to our policy of continuous product innovation some specifications may change without notification Advanced Compressor Technology Oil Management Oil migration is no longer a concern when choos ing Multi V A three stage oil management system ensures a Safe level of oil in the compressor sump An oil injectio
131. ility to pass the proper amount of air over the indoor unit coil This could occur if the ventilation system supply fan is disabled or ventilation dampers mal function while the building exhaust fans continue to operate In this case the indoor unit coil may desperately need air as Z negative static pressure builds at the inlet of the indoor unit On the other hand when using non ducted indoor unit models in conjunction with a constant flow of ventilation air and the Multi V indoor unit supply air volume is reduced below the ventila tion air volume the space temperature is satisfied the ventilation air may flow backwards through the filter media and return air grille Captured particulate from the filter media may discharge into the room Method 3 Introduce Untreated Ventilation Air From an outside air opening duct filtered untreated ventilation air to Multi V indoor units This method can be employed in limited regions of the country where year round ambient conditions and air quality would provide the indoor unit mixed air within LG s published acceptable conditions Refer to the Building Ventilation on page 44 for more information TVANVIN ONIMSSNIDNA LINN ONISNSGNOD did 1VIH SA 4 INDIAS USGB 2009 Green Building Design amp Construction Washington DC USGBC Staff Page 535 Amercian Society of Heating Refrigeration and Air Conditioning Engineers Inc ASHRAE 62 1 2010 sections 6 2 and 6 3 Due to our policy of cont
132. imilar or the heating load may exceed the total cooling load the designer should verify the indoor unit selection satisfies both the heating and cooling requirements Check the indoor unit s cooling capacity If the system is installed at a significant elevation above sea level it may be appropriate to adjust the cooling capacity for changes in air density Look up the appropriate altitude correction factor for a wet coil found in Table 18 on page 53 For each indoor unit multiply the sensible corrected cooling capacity detailed in the LATS report by the altitude correction factor For indoor units located in humid areas perform the same procedure to obtain the actual total cooling capacity After applying the factor verify the sensible and total corrected cooling capacity for each indoor unit is at least equal to the sum of the appropriate cooling design day space load s plus ventilation load s if applicable for the space s served by the indoor unit Next check the indoor unit heating capacity Begin by finding the corrected heating capacity detailed in the LATS report for each in door unit The corrected heating capacity is again different from the nominal heating capacity because the corrected capacity includes changes in unit performance after considering refrigerant line pres sure drop and design ambient operating conditions on the indoor unit s heating capability If the system is installed at a significant elevation above se
133. indoor unit is provided with a factory installed and wired condensate lift pump capable of providing a minimum 27 5 inch lift from the bottom surface of the unit The lift pump comes with a safety switch that shuts off the indoor unit if condensate rises too high in the drain pan Indoor Units Ceiling Concealed Ducted High Static BH BG BR B8 Casing The case is designed to mount concealed above a finished ceiling Fan discharge is front horizontal with a dedicated rear horizontal return The unit is manufactured with coated metal Cold surfaces are covered with a coated polystyrene insulat ing material The cold surface areas of the case are covered externally with sheet insulation made of ethylene propylene diene M class rubber EPDM conforming to ASTM Standard D 1418 The case is provided with hanger brackets designed to support the unit weight on four corners Hanger brackets have pre punched holes designed to accept field supplied all thread rod hangers Fan Assembly and Control Indoor units have two Sirocco fans made of high strength ABS GP 2200 polymeric resin Both fans are directly driven and mounted on a common shaft The fan motor is a brushless digitally controlled BLDC design with permanently lubricated and sealed ball bearings The fan motor assembly is mounted in vibration attenuat ing rubber grommets The fan speed is controlled using a microprocessor based direct digital control algorithm that
134. installed components or accessories including but not limited to refrigerant piping drain lines control and electrical wiring ductwork etc 14 Damage and or failure caused by adjustments of user controls 15 Acts omissions and conduct of any and all third parties including but not limited to the installing contractor LIMITATION OF WARRANTY SCOPE EXCEPT TO THE EXTENT PROHIBITED BY APPLICABLE LAW ANY IMPLIED WARRAN TY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ON THE SYSTEM IS LIMITED IN DURATION OF THIS LIMITED WARRANTY UNDER NO CIRCUM STANCES SHALL LG BE LIABLE FOR ANY INCIDENTAL SPECIAL OR CONSEQUEN TIAL DAMAGES INCLUDING WITHOUT LIMITATION LOST GOODWILL LOST REVENUE OR PROFITS WORK STOP PAGE SYSTEM FAILURE IMPAIRMENT OF OTHER GOODS COST OF REMOVAL AND REINSTALLATION OF THE SYSTEM LOSS OF USE INJURY TO PERSONS OR PROPERTY ARISING OUT OF OR RELATED TO THE SYSTEM LG S TOTAL LIABILITY IF ANY DAMAGES OR OTHERWISE SHALL NOT EXCEED THE INVOICE VALUE PAID BY THE CUSTOMER FOR THE SYSTEM FURNISHED WHICH IS THE SUBJECT OF A CLAIM OR DISPUTE SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITA TION OF INCIDENTAL OR CONSEQUEN TIAL DAMAGES OR ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS SO THE ABOVE LIMITATIONS OR EXCLUSIONS MAY NOT APPLY TO THE CUSTOMER THIS LIMITED WARRANTY GIVES THE CUSTOMER SPECIFIC LEGAL RIGHTS CUSTOMERS MAY ALSO HAVE OTHER RIGHTS THAT VARY FROM STATE TO
135. inuous product innovation some specifications may change without notification U S DESIGN STANDARDS 99 U S Design Standards BUILDING SUSTAINABILITY MULTI V USGBC LEED Green Building Rating System For decades commercial building financial performance criteria influenced architects and engineers to focus on lowering the cost of con struction The trade off for lower first cost was higher energy consumption and poor indoor air quality In recent years with the advent of exploding fossil fuel costs and record litigation settlements related to poor indoor air quality many designers have responded by adopting a new more balanced design approach recognizing that designing with a long term sustainable perspective emphasizing first cost life cycle cost and the impact the development has on the environment will increase the building s value The American Society of Heating Refrigerating and Air Conditioning Engineers ASHRAE and the U S Green Building Council USGBC have been instrumental in developing and documenting voluntary best practice standards that provide the construction industry an all encom passing balanced approach for developing sustainable green buildings USGBC a private organization has developed holistic design standards for developing new and retrofitting existing buildings known as LEED Leadership in Energy and Environmental Design The LEED Green Building Rating System is a voluntary consensus based prog
136. ion MULTI V Auto Changeover Heating Cooling Dry Fan Only o Se The Auto Changeover setting automatically switches between Cooling and Heating modes based on space temperature condi tions Heated or cooled air delivery is depen dant upon outdoor unit operating mode In Heating mode the microprocessor con trol will activate the indoor unit when indoor room temperature falls below setpoint temperature and signals the outdoor unit to begin heating cycle The indoor unit fan operation is delayed until coil pipe temper ature reaches 76 F Significant airflow is generated when pipe temperature reaches 80 F In lieu of factory return air thermis tor pluggable connection sockets on the microprocessor circuit board accommodate various models of wall mounted local controllers and or a wall mounted remote temperature sensor The unit microproces sor is capable of accepting space tempera ture readings concurrently or individually from either 1 Wall mounted wired controller s 2 Factory mounted return air thermistor or the optional wall mounted wired remote temperature sensor A single indoor unit has the capability of being controlled by up to two local wired controllers The microprocessor controls space temperature using the value pro vided by the temperature sensor sensing a space temperature that is farthest away from the temperature set point If the system is provided with an optional wall mounted loc
137. ion they are to be field provided SPECIFICATIONS 117 TWNNVI ONINSSNIDNA LINN ONISNSGNOD did 1VIH SA 4 FAREA ACRONYMS Table 44 Table of Acronyms OA Percentage Outdoor Air JIEQ Indoor Air Quality LEED Related Indoor Unit Correction Factor Acrylonitrile Butadiene Styrene KTL Korea Testing Laboratories Leadership in Energy and Environmental Design LG Air Condtioner Protocol A A A A Thousands BTUs per hour ASHRAE American Society of Heating Refrigeration and Air Conditioning RA S K P M M U Air Handling Unit M G American Wire Gauge M Maximum Fuel Size M N R N M N P Maximum Circuit Ampacity B C C R AH AW Btu h British Thermal Units hour New Construction LEED Related CC Corrected Capacity Ratio Normally Closed CF CI CO CR CS National Electrical Code kili MCA MFS BLDC Building Material Reuse LEED Related Building YR Nco E NEC No CDOA Coupled Dedicated Outdoor Air Cubic Feet per Minute Normally Open Outdoor Air Temperature Existing Building Operations and Maintenance LEED Related Outdoor Uni Outdoor Unit Correction Factor Dry Bulb PDI Power Distribution Integrator dB A Decibels with A frequency weighting Plo Power Input EQ TL AT Bh CA FS R C EC O DDOAS Decoupled Dedicated Outdoor Air Prerequisite LEED Related Digital Input PTAC Packaged Terminal Air Conditioner Digital Output PVE Energy and Atmosphere LEED Related RAT Return Air
138. ion air needed Supply Air Branch Duct Connections Factory designated cutouts are marked on the unit case Branch ducts provide the designer with the ability to duct up to Y the unit airflow capacity to adjacent spaces TQ TR Chassis Connections can be made on up to any two of the three available connection points TM TN TP Chassis Connections can be made on up to any two of four available connection points Architectural Filter Grille The ceiling cassette assembly is provided with an off white ABS polymeric resin archi MULTI N tectural grille equipped with a tapered trim edge and a hinged spring clip Screwless return air filter grille door TM TN TP Chassis The unit case allows access to hanger rods and the inspection of piping through corner access panels on the architectural grille The optional auto elevating grille kit is de signed to provide motorized ascent descent of the return air grille pre filter assembly a distance of up to 14 3 4 feet allowing easy access to remove and clean the filter The kit consists of two lifting mechanisms comprised of an electric motor driven winch with braided steel lifting cables The winch kit is mounted behind the grille and is not visible during normal unit operation The auto elevating return air grille appearance and finish matches that of the architec tural grille on similar indoor unit models equipped with the standard hinged filter grilles The auto
139. irocco fan made of high strength ABS GP 2305 polymeric res in The fan motor is a brushless digitally controlled BLDC design with permanently lubricated and sealed ball bearings The fan motor assembly is mounted in vibra tion attenuating rubber grommets The fan speed is controlled using a microproces sor based control algorithm that provides a minimum of four pre programmed fan speeds in the Heating and Fan Only modes and five speeds in the Cooling mode Fan settings are super high high medium and low Each setting can be field adjusted from the factory setting RPM ESP to com pensate for a limited amount of additional resistance to airflow caused by field con nected ductwork or other airflow restricting devices The fifth speed in the Cooling mode is a fan power cooling cycle that runs for 30 minutes at high fan speed A chaos setting provides a random change in fan speed The fan speed algorithm provides a field selectable fixed speed or auto speed setting that adjusts the fan speed based on the difference between the controller set point and space temperature MULTI NV Air Filter Return air is filtered with a removable washable pre filter The unit is also equipped with a plasma filter Airflow Guide Vanes The architectural grille has a single direc tional slot diffuser with an oscillating motor ized guide vane designed to change the angle airflow is discharged The discharge range of motion is 40 in an
140. is a registered trademark of the U S Green Building Council 1 LEED Reference Guide for Green Building Design and Construction 2009 Edition 2 LEED Reference Guide for Green Building Operations and Maintenance 2009 Edition 3 LEED Reference Guide for Green Interior Design and Construction 2009 Edition 100 U S DESIGN STANDARDS Due to our policy of continuous product innovation some specifications may change without notification MULTI V BUILDING SUSTAINABILITY USGBC LEED Green Building Rating System Table 43 Potential LEED Credits using LG Multi V pa Category Point ID Point Description we ore a m oo a m o o MA Optimize energy performance HVAC gt o E gt O D Le 2 Exist bldg Ongoing commissioning Vee Enhanced commissioning a A Perf measurement bldg automation gt rl gt O O A E o ES oo f ersseiminsenen ee a ems a en seg AI IE MEN m m m m m m m m m m cepeesecenea i O O O als 2 gt LS O O D D Ol AAA mr e eat ers Cw an n O eat ers Ow o O once A Minimum acoustical performance Reduce particulates Occupied space Reduce particulates Construction area Reduce particulates in air distribution Controllability Thermal comfort Controllability Thermal comfort Thermal comfort design Thermal comfort design Thermal comfort verification Enhanced acoustical performance Mold prevention a pS
141. is controlled using a microprocessor based direct digital control algorithm that provides a minimum of three pre programmed fan speeds Fan speeds are high medium and low Each setting can be field ad justed from the factory setting RPM ESP The setting provides delivery of the high speed air volume against an external static pressure of up to 0 8 in wg and up to 85 of the high speed air volume against an external static pressure of 1 0 in wg Air Filter The unit comes with a filter rack capable of accepting a field provided 16 x 20 x 1 filter cartridge The filter rack is equipped with guides that keep the filter centered in the rack Filter service access is from the front of the unit without removing the coil or fan area access panels Filter access door is provided with thumb screws that are removable without the use of tools Optional Auxiliary Electric Heat Module s LG optional electric heat modules are de signed for field installation in the reheat po sition The heater module is provided with heating elements contactors relays high temperature safety switch and intercon necting control wiring harness with a quick connect plug for easy connection to the air handler control board Auxiliary heat modules are available in nominal capaci ties of 5 10 15 and 20 kW at 230 60 1 Heating elements are powered from a field provided separate power source 5 and 10 kW modules are powered from a single power
142. it additions and planned pipe system changes are made Install isolation ball valves on the liquid and vapor lines near the Y Branch or Header on each leg where the future run out piping and unit will be con nected If possible avoid installing the pipe segment between the ball valve and the location of the future indoor unit during the initial phase of the project Cap the future pipe segment 3 to 6 inches from the ball valve discharge and open the valve before system evacuation and charging Close the valve after charging the system Doing so ensures that refrigeration oil will return to the compressor sump and not be trapped in future use pipe segments For example refer to Figure 35 and review the drawing of the run out segment tagged R1 It is very important to verify the system s CR is at least 50 initially and that it does not exceed 130 after all future indoor unit changes and or additions are completed See Determine the System Combination Ratio CR on page 50 for more information Verify the anticipated RUR is within the limita tions listed on page 50 Using Elbows Third party elbows are allowed as long as they are designed for use with R410A refrigerant The designer and installer should use a minimum number of fittings since they must consider the pressure drop each creates measured in equivalent length of pipe in feet When using the LATS Multi V software or when performing manual calculations the additional equivalent pipe
143. its with a minimum of three fan speeds low medium and high A fan s air delivery volume has a linear relationship with the fan speed When the fan speed is limited to the low setting assuming each speed setting modifies the speed of the fan by an equal amount i e Low 33 Medium 66 High 100 the indoor unit capacity will be limited to 33 of nominal capacity and the change in air tem perature over the coil will remain constant because the EEV valve will modulate to maintain a constant coil superheat The following example helps us better understand the potential problem of designing a VRF system with an excessive CR A building has no diversity A nominal 5 ton VRF outdoor unit is connected to nine 13 000 Btu h indoor units with a combined nominal capacity of 9 75 tons The building s cooling or heating block load is 5 tons on the design day Each indoor unit serves a single room with a peak total cooling load of 6 500 Btu h and a heating load of 6 500 Btu h Therefore each indoor unit is oversized by approxi mately 50 13 000 Btu h 6 500 Btu h The CR of this VRF design is 195 9 75 tons of nominal indoor capacity 5 0 tons outdoor unit nominal capacity x 100 It is morning on the summer design day and each indoor unit is cool ing their respective zones At noon the load in each zone begins to rise with all spaces peaking at 3 00 pm calling for 6 500 Btu h of cooling The system s operating RUR is at 195 9 x 13
144. l Central Controller PQCSW320A1E Features e 7 inch LCD touchscreen Stylus pen with storage slot Forced off non voltage input contacts Operation On Off Display On Off Screen Saver Customize names Zones Groups Individual Units e Mode select Auto Cool Dry Heat Fan Only Group control Group up to 64 devices by refrigerant circuit floor tenant department area or any desired category AC Smart controls and monitors device operating schedules room temperatures and other operating parameters System backup The AC Smart is equipped with an onboard battery to preserve configuration data and settings during brief power outages A USB port is also provided to backup the AC Smart database and to update operating system software Malfunction notification via e mail When the AC Smart detects a unit malfunc tion the controller has the ability to notify the responsible party through e mail Conserve energy AC Smart may be programmed to start and stop each device based on a customizable seven day schedule and an annual calendar for exception days Multiple schedules can be created for larger facilities that accom modate variable occupancy patterns In addition to scheduling the Time Limited Running feature can restrict the maximum number of hours that an air conditioner can A Note Setpoint contro Zones Groups Individual Units Local controller lock function All Mode Temp Fan Grouped local unit
145. l VRF systems If a VRF manufacturer is designing a system with what could be perceived as an excessive CR the system s saturated suction temperature must be maintained within a similar operating Due to our policy of continuous product innovation some specifications may change without notification EQUIPMENT SELECTION PROCEDURE ARUN 036 047 053 temperature range as a VRF system designed with a CR between 50 and 130 In system designs that allow more radical CR design parameters the potential exists of having an RUR exceeding 130 The potential of a system shutdown caused by high suction temperature is controlled using a special algorithm designed to limit the heat transfer capabil ity of the indoor unit s With some equipment manufacturers the common algorithm locks all indoor units fan speed in low whenever the RUR rises above 130 Once invoked the algorithm will not allow the indoor unit fans to return to high speed operation until the system s RUR drops back to 90 A Note This low fan speed lock algorithm may main tain the saturated suction temperature as designed however the applications engineer needs to be aware of the algorithm s impact on indoor unit cool ing or heating performance Under some operating conditions it may create unacceptable comfort levels in the building when ambient temperatures are ap proaching design conditions The majority of all VRF equipment manufacturers design indoor un
146. late since the quantity of outdoor air is not regulated May affect indoor unit proper operation when open TVANVIA ONIYZINIDNZ LINN ONISNSGNOD did 1VIH SA 4 FAREM Disadvantages Fan s will be required to push outdoor air to the indoor unit Indoor units are engineered for low sound levels and are not designed to overcome the added static pressure caused by the outdoor air source ductwork Ventilation air must be pre filtered before mixing with the return air stream LG indoor cassette models are configured to introduce the ventilation air downstream of the return air filter media Ducted 1 way and 4 way cassette models are the only indoor units that accept the connection of an outdoor air duct to the unit case Mixed air conditions must be between a minimum of 59 F DB while operating in Heating mode and a maximum of 76 F WB while operating in Cooling mode Depending on the ventilation air volume requirement the location choices are limited where untreated outside air may be introduced to the building using this method Larger indoor units may be required to satisfy for additional outdoor air Motorized dampers may be required to prevent outdoor air flow through the indoor unit when the indoor unit is not operating An LG Dry Contact adapter may be necessary to interlock the motorized damper with the indoor unit While operating in Heating mode the untreated outdoor air may delay the start of the indoor unit fan impacting b
147. led BLDC design with permanently lu bricated and sealed ball bearings The fan motor assembly is mounted in vibration at tenuating rubber grommets The fan speed is controlled using a microprocessor based direct digital control algorithm that provides a minimum of four pre programmed fan speeds in the Heating and Fan Only modes and five speeds in the Cooling mode Fan settings are super high high medium and low Each setting can be field adjusted from the factory setting RPM ESP to compensate for a limited amount of ad ditional resistance to airflow caused by field connected ductwork or other airflow restricting devices The fifth speed in the Cooling mode is a fan power cooling cycle that runs for 30 minutes at high fan speed A chaos setting provides a random change in fan speed The fan speed algorithm provides a field selectable fixed speed or auto speed SPECIFICATIONS 107 TVWNNVIN ONINSSNIDNA LINN ONISNSGNOD did 1VIH SA SA FAREA Specifications 108 SPECIFICATIONS MECHANICAL SPECIFICATIONS Indoor Units 2 Way Ceiling Cassette TL setting that adjusts the fan speed based on the difference between the controller set point and space temperature Air Filter Return air is filtered with a removable washable pre filter The unit is also equipped with a plasma filter Airflow Guide Vanes The architectural grille has two parallel di rectional slot diffusers each equipped with oscillating motorized guid
148. length of all fit tings must be accounted for in the respective segments See Table 21 on page 61 Due to our policy of continuous product innovation some specifications may change without notification PIPING DESIGN GUIDE Field Provided Isolation Valves LG neither provides nor requires isolation ball valves on indoor units for proper system operation If isolation is desired full port isolation ball valves with Schrader ports positioned between valve and indoor unit rated for use with R410A refrigerant should be used on the liquid and vapor lines Position the valves so they are easily accessible for service If necessary install drywall access doors or removable ceiling panels Position valves with 3 to 6 inches of pipe on either side Position valves with adequate clear ance for applying field insulation If valves are not installed and a single indoor unit needs to be removed or repaired the entire system must be shut down and evacuated If isolation ball valves are installed the unaffected indoor units may be operated after the control system is rebooted if the system CR excluding the discon nected unit remains between 50 and 130 See Determine the System Combination Ratio CR on page 50 Refrigerant Specialties In line refrigeration components such as solenoid valves filter dryers sight glasses tee fittings and after market refrigerant pipe system accessories are prohibited and cannot be used with the Multi V Mi
149. limits of 59 F DB for heating and 76 F WB for cooling space load is satis If the coil entering air condition limitation is exceeded the indoor unit may fied This may result malfunction and prevent the indoor unit from operating ah paniey If the outdoor air unit cooling or heating system fails the malfunction may late on the filter me dia being blown back be masked by the indoor unit ramping up operating parameters to compen mto tie conditioned sate for the failure space a Motorized dampers may be required to prevent outdoor air from entering e Outdoor Air Unit ERV 46 SYSTEM ENGINEERING Front Panel Due to our policy of continuous product innovation some specifications may change without notification uE Flange O D 6 57 Ventilation Kit the indoor unit while the indoor unit has cycled off An LG Dry Contact adapter is necessary to interlock the motorized damper with the indoor unit fan operation In lieu of using the factory mounted return air thermistor a remote wall temperature sensor or zone controller may be required to provide an ac curate conditioned space temperature reading MULTI NM MINI Always use LATS Multi V Software To properly select and size Multi V system components follow these guidelines e Zone the building e Determine the ventilation method Select the indoor unit s Select the outdoor unit System sizing checks Calculate the Corrected Capacity Rati
150. local and national code Must follow installation instructions in the appli cable LG installation manual CUT SHEET Pipe and Electrical Connections Figure 64 036 047 053 Piping Figure 65 036 047 053 Piping Table 31 Outdoor Unit Pipe Connections in Options Front Side Connections Options Rear Connections te ge oom lt lt e Model Due to out policy of continuous product improvement some specifi cations may change without notice SANAAALAAANLAAANAANN EG AMIA MAMMA Y A Figure 66 036 047 053 Figure 67 036 047 053 S Front Connections Rear Connections Side Connections Table 32 Outdoor Unit Wiring Connections o oes e ot lia lll ad Use rubber or polymeric resin grommets 1 1 4 Knockout e Liquid line connection poy 9 l 4 x5 Cutout Bundled amean e Keep pests out 4 4 x2 Cutout gt Power e seek an Fill area around pipe bundle with spray foam and suitable weather tight cover 9 e Gasket rough metal edges to protect pipe and wire chaffing Figure 69 036 047 053 Figure 70 036 047 053 Figure 71 036 047 053 Front Connection Detail Rear Connection Detail Side Connection Detail Table 33 ARUN 036 047 and 053 Piping and Electrical Connection Dimensions in a e ee Lo mo Font o ew mw sae ese w mw eis ane o O 2 1 4 4 1 8 5 3 16 6 3 8 1 7 8 4 1 8 4 11 16 MIN 11 7 16 3 7 8 5 7 8 Due to our policy of continuous product innovation some
151. mance and capacity data The report calculates the system CR calculates the system refrigerant charge and provides detailed bill of material information including a list of Multi V outdoor units indoor units control devices accessories and refrigerant pipe sizes segregated by building by system by pipe size and by pipe segments CAD mode e Imports the building s architectural CAD drawing dwg format e Imports building loads from an external file xls format e Lays out refrigerant piping directly onto an overlay of the building drawing e Assigns room loads to indoor units e Automatically calculates pipe segment lengths based on drawing layout e Creates an export image file for import to the building drawing set dxf format e Generates a system engineering report xls format Tree mode Imports building loads from an external file xls format e Selects system component using an easy drag and drop process e Automatically analyzes and checks the design complies with most piping design limitations e Assigns room loads to indoor units e Sizes refrigerant piping e Generates a system engineering report xls format e Generates a picture of the piping tree diagram dxf format Figure 33 Screenshot of LATS Pipe System Design Tool Displaying a Tree Mode Piping Diagram H srao oe an taara 4 A Adi CA SS m Symmes es ee fe nr I ue oa a a am Sar aaa m ae m a EE E A Sie A
152. minal Cooling Capacity Outdoor Air Indoor Unit Entering Air Wet Bulb Temperature F Combinati Ratio POS s Tet Ja ToT vw 7 DB Meh Pi wen PL MBh PI MBh PI Bh PI Meh PI Meh In 118 OD MI k 179 40176 os 214 os 241 095 267 108 299 121 318 128 345 143 eats oes O O 287 IT 08 ie ais E ms tas o so 176 oz 214 087 241 o9 267 1m 29 124 318 133 345 146 o 78 076 214 o m1 iw E 118 209 i sis 141 us 150 70 O w rs os aia 108 a 12 267 in 209 161 as is us 198 o n 16e tor 24 128 241 14 267 173 29 19 38 217 345 245 O pH ts1 oso 183 o72 206 os82 229 09 267 103 273 110 26 12 o 181 ome 103 075 os oss 28 os 257 10s ars 118 ms ter T E N eee ee ee E D w s os 183 os 206 o 29 1 257 i 73 1a 298 101 a O w 151 os2 183 104 26 122 29 1m 27 162 273 177 26 200 C o s on s3 os m2 ose tat o n4 os 27 ow ms 000 oe e oe es os 0 O tet a6 ata o m7 oat a 090 o as osa 183 060 472 os 191 om ne os 27 ow ms 101 pC oso 153 061 172 069 tes 078 214 087 227 09 26 103 50 w m os ss 0 172 on w1 os n4 om 27 o 20 108 o s os s3 oe m2 om
153. minal capacity of all connected indoor units with the nominal capacity of the outdoor unit serving them Find the nominal capacity information for indoor units Table 4 Table 5 and outdoor units Table 7 Table 12 For example A VRF system has an outdoor unit with a nominal capacity of C and four indoor units having nominal capacity ratings of W X Y and Z respectively the CR would be determined as follows WA YZ CR Te x 100 A Note The Multi V system will not commission start or operate unless the CR is between 50 and 130 If the CR is over 100 the designer is under sizing the outdoor unit relative to the combined nominal capacity of the connected indoor units Some under sizing of the outdoor unit is prudent as it reduces the initial equipment investment cost and will properly perform as long as the designer knows the nominal size of indoor unit s are oversized relative to the actual load s in the spaces served or the designer knows the space loads will peak at different times of the day i e building has load diversity Over sized indoor units may be unavoidable when the smallest size indoor unit available from LG is significantly larger than what is necessary to satisfy the space load This scenario usually occurs when an indoor unit selection one size down from the selected unit is slightly short of fulfilling the design load requirements A Note If the outdoor unit is properly sized to offset the building
154. minimum of three pre programmed fan speeds Fan settings are high medium and low Each setting can be field adjusted from the factory speed setting RPM ESP to compensate for a limited amount of additional resistance to airflow caused by field provided airflow restricting devices The fan speed algo rithm provides a field selectable fixed or auto speed setting that adjusts fan speed based on the difference between controller set point and space temperature Air Filter Return air is filtered using two 2 remov able washable filters on the 7 15 MBh models and three removable washable filters on the 18 24 MBh models Access to the filter media is from the return air toe slot located on the front of the unit without removing unit panels Microprocessor Controls The unit is provided with an integrated microprocessor based controller A temperature thermistor is factory mounted in the return air stream The controller is capable of performing functions necessary to operate the system without the use of a separate unit or wall mounted control ler All unit operation parameters exclud ing the operation schedule are stored in non volatile memory resident on the unit microprocessor Operating schedules are Stored in select models of the optional unit or wall mounted local or central controller The field supplied communication cable between the indoor unit s and outdoor unit is to be a minimum of 18 AWG 2 conductor stranded
155. motion detector or similar occupancy or condition sensor The binary outputs provide two signals one for reports of indoor unit operation status and the other reports unit malfunction error status These outputs can be used for simple status monitoring or to enable exter nal devices such as exhaust fans outdoor air dampers fans and lighting Dry Contact Unit for Setback PQDSBC The Dry Contact Unit for Setback enables the indoor unit to be controlled and monitored by third party controls by way of a contact closure of two binary inputs and two binary outputs The binary inputs are ONT CONTACT car used in sequence to turn the indoor unit On Off force thermo off set remote controller lock set mode o set fan speed and set occupied and unoccupied setpoints for setback depending on what setting has been pre configured during commissioning These inputs can take field supplied binary signals from a building automation system timer keycard switch door window switch motion detector or similar occupancy or condition sensor The binary outputs provide two signals one for reports of indoor unit operation status and the other reports unit malfunction error status These outputs can be used for simple status monitoring or to enable external devices such as exhaust fans outdoor air dampers fans and lighting A Note Availability depends on the indoor unit model being controlled See Table 6 Indoor Units Controls and Options
156. n flammability and cardiac sensitization A Note This designation does not indicate that R410A is non toxic With high enough concentration levels all refrigerants can be hazardous The standards are written to cover worst case scenarios and assume that the complete system charge is released into a confined space over a short period of time If a refrigerant leak occurs the actual concentration level in the confined space is dependent on the quantity of refrigerant in the equipment and the volume of air available for dispersion and dilution The total estimated charge of the refrigeration system is calculated by either LG s LATS Multi V see LATS Multi V Pipe System Design Tool on page 58 refrigerant piping design software or manually by following the procedure titled Mini Refrigerant Charge on page 76 To apply the standard the designer must first determine the occupied space with the smallest cubic volume served by the system American Society of Heating Refrigeration and Air Conditioning Engineers Inc ASHRAE Standard 15 2007 Atlanta GA ASHRAE Inc Section 7 3 96 U S DESIGN STANDARDS Due to our policy of continuous product innovation some specifications may change without notification MULTI N v ASHRAE STANDARDS SUMMARY ASHRAE Standard 15 2004 and ASHRAE Standard 34 2007 Calculate the volume of air in each occupied space using the following guidelines to determine the dimensions of each space Nonconnected Sp
157. n cable included e External static pressure control e Device power provided by indoor unit e Discharge vanes Auto Swing Fixed e Wireless Zone Remote Controller Receiver A Note 1 First indoor unit on will determine mode cooling heating for Multi V Mini 2 Availability depends on the indoor unit model being controlled See Table 6 Indoor Units Controls and Options on page 20 3 Requires optional Wired Remote Controller Group Control Kit PZCWRCG3 one per ad ditional indoor unit and or controller maximum of 4 except for TM TN and TP frames 4 Communication cable can be extended to a maximum 164 feet by using the Wired Zone Controller Extension Cable PZCWRC1 maximum of 4 Wireless Handheld Controller with Mode Selection Key PQWRHDFO The Wireless Handheld controller allows control of indoor unit operation mode fan speed and temperature setpoint The controller works with any indoor unit with a unit mounted infrared eye or connected to a wired controller with infrared receiver Features Unit operation ON Off e Plasma electronic filter On Off Temperature control F or C e Smart Clean Start Stop e Instantaneous room temperature display e Vertical Discharge vanes Auto Swing Fixed e Cooling range F 64 86 e Horizontal Discharge vanes Auto Swing Fixed e Heating range F 60 86 e Wall mounted controller cradle e Mode selection Fan Heat Cool Auto Dry e Infrared signal operati
158. n mechanism provides a consistent film of oil on moving parts even at low speeds which enables LG s inverter compressor Operation down to 25 Hz 1 The compressor discharge is specially de signed to minimize the amount of oil leaving the compressor 2 An oil separator located on the discharge side of the compressor s separates the majority of oil mixed with the refrigerant gas stream during compression Oil is returned to the compressor through a gravity drain 3 Oil return algorithms flush the oil from the distribution system back to the compressor Inverter Driven The R410A rotary compressor is optimized to maximize compressor efficiency which reduces power consumption and monthly utility bills The latest inverter technology allows the LG Multi V to vary the compressor motor shaft speed to deliver an appropriate amount of cooling to all indoor units Precise refrigerant volume delivery translates into long periods of time with coil surface temperatures below dew point and minimizes compressor and fan component run time Occupants remain comfortable while utility costs are reduced ia MULTI N UNIT NOMENCLATURE Outdoor and Indoor Units ARU N 053 G S 2 A Outdoor aiy ARU Multi V Outdoor Unit Refrigerant R410A Type N Inverter Heat Pump Nominal Capacity Nominal cooling capacity in Btu h 036 38 000 047 48 000 053 53 000 TVANVIN ONIMSSNIDNA LINN ONISNSGNOD did 1VIH SA AA FAREM
159. n on the System nameplate label whichever occurs first HOW DOES THIS LIMITED WARRANTY APPLY 1 The remedies set forth in the Limited Warranty shall be the sole and exclusive remedies and the original warranty period in this Limited Warranty shall not extend beyond the period set forth therein nor will a new warranty period begin upon replacement of the Part s provided under this Limited Warranty 2 Replacement Part s may be of like kind and quality and may be new or remanufactured Part s and warranted for the remaining portion of the original System s warranty period or ninety 90 days whichever is longer 3 Defective Part s must be made available to LG in exchange for the replacement Part s and become the property of LG This Warranty covers the transportation cost for reshipment of any replaced Part s to the Customer but does not cover the transportation cost and risk including shipping damage or loss for return of the Part s to LG or its authorized agent and any other costs associated with installation removal or re installation of the Part s If any Part s returned to LG is found not to be defective or this Limited Warranty has expired the Customer is responsible to pay for return shipping cost 4 This Limited Warranty does not cover charges for labor or other costs incurred in the trouble shooting maintenance repair removing replacing installing complying with local building and elec tric co
160. n the outdoor ambient dry bulb temperature is between 23 F and 115 F indoor and outdoor unit Rapid cooling operation is stable at indoor temperatures up to 80 F DB MBh Net Capacity Power Input PI in kW and includes compressor s and outdoor fan motor s R410A 60 Hz 30 PERFORMANCE DATA Due to our policy of continuous product innovation some specifications may change without notification MULTI V PERFORMANCE DATA Heating Capacity 3 0 Ton Table 10a ARUNO366GS2 Heat Pump Nominal Heating Capacity Outdoor Air Indoor Unit Entering Air Dry Bulb Temperature F MBh MBh PI MBh PI MBh PI MBh MBh PI MBh PI MBh Combination 76 Oo Ratio DB WB EE RIA EA Co or sens ms a as ae o a as ae a an er ao 10 mo wo ae am ss an as an on or sa ar am as aa oe ae o jor ar ce ar ie ar as ar aes aro era ar a oo oo r as r am ur om ar oo f ar ola fass ar f as a 120 Too on o es om an o a oe o le oa en ar ae aa asas ee a oe a osas ez a Too ae ae os se we ams wa aw wz ow a om ar sm we ar no uo wa me ow ge os ms e as am me ia us an as om ws oe Capacity rated using ISO 5151 Test Rating Standard for Non Ducted Heat Pumps Rated with an equivalent piping length of 24 6 ft and no change in elevation between the Heating mode stable operation is ensured when the outdoor ambient wet bulb temp
161. nants into the occupied areas originating from indoor and outdoor sources The standard also addresses the proper introduction of ventilation outdoor air into the building using two methods 1 The Ventilation Rate Procedure VRP is a prescriptive approach that sets minimum design requirements when sizing the building s venti lation equipment including e Outdoor air quality requirements e Treatment procedures used if the outdoor air is deemed contaminated Volume of outdoor air that must be introduced to the occupied areas of commercial institutional vehicular industrial and residen tial buildings 2 The lAQ compliance procedures The standard under section 6 3 allows the designer to significantly reduce the ventilation air volume required using the VRP procedure when high efficiency air filtration products designed to remove particulate and gas phase contaminates are specified This procedure is a performance based design approach where the indoor air quality in the occupied areas is actively monitored using sensing devices When the IAQ falls below specified levels the volume of outside air introduced into the building is modified There are three methods used for ventilating buildings 1 Mechanical active ventilation 2 Natural passive ventilation 3 Mixed mode active and passive ventilation The intent of this discussion is to provide guidance for the designer when applying active mechanical ventilation m
162. ng functions self diagnostics auto restart following power restoration and will operate the indoor unit using one of the following five operation modes 1 Auto Changeover Heating Cooling Dry Fan Only i gt Se 1 Auto Changeover mode automatically switches between cooling and heating based on room temperature conditions Chilled or heated air delivery is depen dant upon outdoor unit type and system operating mode In Heating mode the microprocessor control does not begin fan operation until coil pipe temperature reaches 76 F Significant airflow is generated when pipe temperature reaches 80 F A field select able option maintains fan operation for 30 Due to our policy of continuous product innovation some specifications may change without notification minutes following cooling cycle operations The controller is capable of monitoring space temperature using any of the three sensors individually or any two of the three concurrently 1 Wall mounted wire controller 2 Factory mounted return air thermistor or the optional wall mounted wired remote temperature sensor The microprocessor controls space temperature using the value provided by the temperature sensor sensing a space temperature that is farthest away from the temperature setpoint A single indoor unit has the capability of being controlled by up to two local wired controllers The microprocessor control provides a Cooling mode test cycle that
163. ng range 15 feet 45 e Fan speed Low Med High Power Auto off center Gua e Clock e Function setting for auto clean smart clean e Timer Sleep On Off electric heat and individual vane angle control e Jet Cool On Off Two AAA batteries included A Note 1 First indoor unit on will determine mode cooling heating for Multi V Mini 2 Availability depends on indoor unit model being controlled See Table 6 Indoor Units Controls and Options on page 20 Only with ArtCool Mirror and Wall mounted indoor units Requires wired controller with infrared reciever for ducted floor standing and vertical air handler models of indoor units Ao 86 CONTROLS Due to our policy of continuous product innovation some specifications may change without notification MULTI V ZONE CONTROLLERS 7 Day Programmable Controller Wired Remote Controller Black PQRCVSLO White PARCVSLOQW The 7 Day Programmable controller allows control of indoor unit operation mode fan speed and temperature setpoint Programmable schedule allows for automatic energizing and shutdown of the indoor unit up to twice a day with setpoint control Features e LED indicator for operating status e Discharge vanes Auto Swing Fixed e Backlit e Child Lock Unit operation On Off e Group control of up to 16 indoor units e Temperature control F or C Multiple controllers per indoor unit or indoor unit e Instantaneous Room Temperature Di
164. ni Sight glasses solenoid valves and tee fittings may cause gas bubbles to form in the liquid line Over time dryers may deteriorate and introduce debris into the system Oil Traps Oil traps are not permitted The Multi V system is engineered with redundant systems that ensure oil is properly returned to the com pressor The designer and installer should verify that the refriger ant piping system is free of oil traps For instructions on routing a pipe segment around an obstacle see Handling Obstacles on page 71 SYSTEM ENGINEERING 65 TVANVIA ONIYSANIDNE LINN DNISNIONOD did 1VIH SA SA FAREMA PIPING DESIGN GUIDE MULTI N MINI Selecting Copper Tubing Choose the tube wall thickness to meet local codes UL standards Copper is the only approved refrigerant pipe material for use with and it must be approved for an operating pressure of 551 psig If LG Multi V commercial air conditioning products Hard drawn or an local codes do not specify wall thickness LG suggests using tubing nealed copper tubing is acceptable and the designer chooses which Sizes as specified in Table 24 When bending soft copper tubing one to use use the largest radius bends wherever possible to reduce the equiva lent length of installed pipe Be sure no traps or sags are present Drawn temper ACR copper tubing is available in sizes 3 8 thru when rolling out and installing soft copper tubing 1 1 8 inches ASTM B 280 clean dry and capped e
165. nit operating schedule are stored in non volatile memory resident on the unit microprocessor Operating schedules are Stored in select models of the optional wall mounted local or central controller The field supplied communication cable Due to our policy of continuous product innovation some specifications may change without notification between the indoor unit s and outdoor unit is to be a minimum of 18 AWG 2 conductor stranded and shielded cable RS485 terminated via screw terminals on the control boards The microprocessor control algorithms provide the following functions self diagnostics auto restart fol lowing power restoration test run and will operate the indoor unit using one of five operating modes 1 Auto Changeover 2 Heating 3 Cooling 4 Dry 5 Fan Only The Auto Changeover setting automatically switches control of the indoor unit between Cooling and Heating modes based on space temperature conditions Heated or cooled air delivery is depen dant upon outdoor unit operating mode In Heating mode the microprocessor control will activate indoor unit operation when the indoor room temperature falls below setpoint temperature At which point a signal is sent to the outdoor unit to begin the heating cycle The indoor unit fan operation is delayed until coil pipe temperature reaches 76 F Significant airflow is generated when pipe temperature reaches 80 F The unit is equipped with an inf
166. nsured when the outdoor ambient wet bulb temperature is between 4 F and 60 F indoor and outdoor unit Power Input PI in kW and includes compressor s and outdoor fan motor s MBh Net Capacity R410A 60 Hz Due to our policy of continuous product innovation some specifications may change without notification PERFORMANCE DATA 3 N TWANVW 9NIXIINI NI LINN SNISNSGNOD dNNd 1VIH SA 4 4 INDIA PERFORMANCE DATA MULTI Y Heating Capacity 4 4 Ton Table 12b ARUNO53GS2 Heat Pump Nominal Heating Capacity Outdoor Air Indoor Unit Entering Air Dry Bulb Temperature F 59 10 DB WB MBh PI MBh PI MBh PI MBh Pl MBh PI MBh Pl MBh PI MBh Pi o fae er om e1 oe e1 om er ro e1 ro we ros ae vm a 105 Too oo oe ro we 72 we r wo re wo 7m ws 7m 09 rm ao om so mo so ro soo 005 wo om 00 om mo om sor om 001 om 000 em 100 oo wo ws em os oo sor om aon om 0 on 00 ow sor om 0 om o xo oo om oo cw om om 00 om 000 em so sm s1 so mo s2 oo wo ms om m7 se ars sm m0 am 000 000 oor ee 601 000 009 om Ca aa oo om ar su wos os mo cm ooo om mo om m9 oom w3 om o o ais ow wo om os om wa om wa om wa 082 wa ro a ro Poo as we om wa cos wa ov oe cm oa 090
167. nt length 35 4 feet Branch segment B2 2 Segment cooling cap 7 5 MBh Linear distance 15 feet a eee Equivalent length 25 6 f et A ARNUO73R2 De rpn von oye Segment cooling cap 30 0 MBh Ml wen Recessed Ceiling 7 a we 4 Way Cassette S O Branch segment B2 3 Hie e Solin Ta MES Branch segment B2 1 ie as Linear distance 8 feet Heating 8 5 MBh CT gt Linear distance 24 feet Equivalent length 7 6 feet Equivalent length 26 8 feet Segment cooling cap 22 5 MBh O Segment cooling cap 37 5 MBh g Run out R3 Linear distance 35 feet Q Equivalent length 35 4 feet Y Segment cooling cap 7 5 MBh ARNUO73R2 Branch segment B2 4 Recessed Ceiling Run out R2 Branch segment B1 1 4 Way Cassette Linear distance 1 feet ia feet Linear distance 12 feet Cooling 7 5 MBh Equivalent length 10 4 feet re E eae at cap 15 0 MBh D Equivalent length 22 5 feet Heating 8 5 MBh Segment cooling cap 7 5 MBh Y j AARE lap Segment cooling cap 22 5 MBh Run out R6 Run out R6 Cc Linear distance 18 feet Linear distance 18 feet l l Equivalent length 19 6 feet Equivalent length 18 6 feet Segment cooling cap 7 5 MBh Run out R8 Segment cooling cap 7 5 MBh Main pipe segment M1 Linear distance 18 feet D Linear distance 6 feet RunvurRi Equivalent length 19 6 feet Q pant i D Equivalent length 20 2 feet e eae 8 5 feet Segment cooling cap 7 5 MBh gt y ee EA gt Segment cooling cap 60 0 MBh j X Equivalent Length 9 7 feet a a ae
168. o CCR Determine the system Combination Ratio CR Determine the Running indoor Unit Ratio RUR The following procedure should not replace LG s LATS Multi V complimentary selection software but should instead be used in conjunction with it Contact your LG representative to obtain a copy of the software and the user s manual When using the LATS Multi V software the default indoor condi tions of 80 6 F DB cooling and 67 F WB heating may be adjusted to the designer s preferred indoor room design temperature These indoor room temperatures are thermostat setpoints and should not be confused with entering coil conditions A Note Data provided in the LATS tree mode diagram or report file is not valid unless the Auto Piping and System Check routines are run without errors Errors will be reported immediately in pop up dialog boxes or red lines surrounding indoor unit s and or along pipe segments If errors are indicated modify the pipe system design and re run LATS Zone the Building Multi V Mini Heat Pump is a two pipe heat pump system that can cool or heat but not both simultaneously Therefore the designer should combine spaces with similar load profiles located near or adjacent to each other into thermal zones Calculate the peak cooling and heating loads for each thermal zone Determine the Ventilation Method Decide how ventilation air will be introduced to each space Add ventilation load s to the appropri
169. oblems caused by snow and ice During the cooling season the outdoor unit s will be protected from the adverse effects of direct sunlight After selecting an outdoor unit model and the outdoor unit s cor rected cooling and heating capacity has been determined there may be additional capacity correction factors to consider In Cooling mode two correction factors may apply one for the ele vation difference between the outdoor unit and the indoor unit s and a second for the altitude above sea level If the corrected cooling Capacity was manually calculated apply the appropriate elevation difference factor found in either Table 15 or Table 16 on page 53 choice of table depends on the architecture of the system design Multiply the manually calculated outdoor unit corrected cooling ca pacity by the elevation difference correction factor If the corrected cooling capacity was derived from the LATS report this elevation difference correction factor was already applied to the system design by LATS and no action will need to be taken If the system is installed at a significant elevation above sea level the outdoor unit capacity will be affected by air density To calculate the effect on cooling capacity find the appropriate altitude correction factor for a dry coil found in Table 18 Multiply the corrected cooling capacity detailed in the LATS report or the manually calculated cool ing capacity after applying the elevation difference corre
170. of the unit MECHANICAL SPECIFICATIONS Indoor Units Floor Mounted Uncased CEU CFU Microprocessor Controls The unit is provided with an integrated microprocessor based controller A temperature thermistor is factory mounted in the return air stream The controller is capable of performing functions necessary to operate the system without the use of a separate unit or wall mounted control ler All unit operation parameters exclud ing the operation schedule are stored in non volatile memory resident on the unit microprocessor Operating schedules are Stored in select models of the optional unit or wall mounted local or central controller The field supplied communication cable between the indoor unit s and outdoor unit is to be a minimum of 18 AWG 2 conductor stranded and shielded cable RS485 terminated via screw terminals on the control boards The microprocessor control provides the following functions self diagnostics auto restart following power restoration test run and will operate the indoor unit using one of five operating modes 1 Auto Changeover 2 Heating 3 Cooling 4 Dry 5 Fan Only The Auto Changeover setting automatically switches between Cooling and Heating modes based on room temperature condi tions Chilled or Heated air delivery is depen dant upon outdoor unit type and system operating mode In Heating mode the microprocessor control will activate the indoor unit when indoor
171. on Cables See Figure 55 Figure 56 and Figure 57 See page 75 for all low voltage wiring termination details Lightning Protection Field supplied where applicable Installed per local code 1 For detailed information refer to Dimensional Data and Weights on page 80 and Pipe and Electrical Connections on page 87 for exact location of pipe and electrical connections 2 Minimum 18 AWG shielded stranded 2 conductor or size per local code whichever is larger 3 Referto Table 2 on page 15 for full load ampere ratings Size all wiring and field provided components per local codes 74 SYSTEM ENGINEERING Due to our policy of continuous product innovation some specifications may change without notification MULTI V JOBSITE CONNECTIONS Low Voltage Wiring A Use 2 conductor stranded and shielded wire with the shield grounded at the outdoor unit Connect the communications cable between indoor units using a daisy chain configura tion only Star or home run control wiring connections involving soldering or wire caps are not permitted Minimum 18 AWG 2 conductor stranded shielded copper cable only Provide separate conduits for control wiring and power wiring Power and communications cables must not be routed in the same conduit and must be routed in a manner that keeps them a minimum of 2 inches apart Connect outdoor unit terminal IDU A to the odd numbered indoor unit terminal Terminal
172. on page 20 Set mode choices are limited to heat cool and fan only Setting unit to operate in dry mode is not available Digital Output DO Kit PQNFPOOT The digital output kit provides control flexibility in a variety of applications where simple binary on off control of third party devices and equipment is required Each DO Kit provides for a single output through an isolated double pole single throw DPST relay The DO Kit works in conjunction with a variety of LG central controls including AC Ez AC Smart ACP and BACnet and LON Gateways Ad dressed as a discreet device the DO Kit can be incorporated into the schedule pattern programmed on an LG central controller to provide for start stop control of third party air conditioning systems fans pumps isolation dampers and lighting Each DO Kit Includes e Two piece steel surface mount enclosure e A25 amp double pole single throw normally open relay e Pre fabricated line voltage connection cable e Installation manual Due to our policy of continuous product innovation some specifications may change without notification CONTROLS 93 TVNNVI ONINZANIDNE LINN ONISNAGNOD did 1VIH SA VA FEDEA Controls CONTROL PRODUCTS ACCESSORIES MULTI V PDI Power Distribution Indicator PQNUD1S01 PDI is a hybrid energy monitoring technology that combines direct energy measurement with software cal culated and apportioned electrical performance data Each system repre
173. operates the unit for 18 minutes without regard to the space temperature If the system is provided with an optional local or central controller displayed diagnostic codes are specific and provide the service technician with the reason for the code displayed Handling Condensate The drain pan is designed to work with a gravity building drain system If conden sate lifts oumps are needed they are to be field provided A secondary drain port plug is provided allowing the pan to be drained for service Indoor Units Ceiling Suspended VJ Casing The case is designed to mount against the ceiling surface in a horizontal discharge configuration The return air is from the bottom and discharge is from a single slot on the front of the unit The unit is manufactured using a coated metal frame covered with an off white ABS architectural polymeric resin exterior case Cold sur faces are covered with a coated polysty rene insulating material SPECIFICATIONS 113 TVNANVIN ONINSSNIDNA LINN ONISNSGNOD did 1VIH SA 4 FAREA Specifications MECHANICAL SPECIFICATIONS Vertical Horizontal Air Handler NJ NK Fan Assembly and Control The unit has a single direct driven Sirocco fan made of high strength ABS HR 2407 polymeric resin The fan mo tor is a brushless digitally controlled BLDC design with permanently lubricated and sealed ball bearings The fan motor assembly is mounted in vibration attenuating rubber grommets
174. or right end in the horizontal position Return air plenum subbase is to be field provided The supply air connection is male flange The unit case is made of 22 gauge coated metal and the external surfaces are finished with a high gloss baked enamel finish Finish color is morning fog me dium beige Cold surfaces are galvanized steel The cold surfaces of the case are internally insulated with inch foil faced polystyrene fiber insulation The inside surface of the fan assembly door access panel is treated with inch polystyrene fiber insulation encapsulated on both sides and sealed along the edges with a reinforced foil faced covering to prevent deterioration caused by panel removal All access panels are provided with gasket seals to minimize air leakage The unit case is designed to accept an internal optional LG electric strip heater The unit bears the ETL label Unit breaker fuses and or disconnect are provided by others Fan Assembly and Control The indoor unit has an integral fan as sembly consisting of a galvanized steel housing and a forward curved fan wheel The direct drive fan motor assembly is mounted on rubber grommets isolating the rotating assembly from the fan housing The fan motor is a brushless digitally con MULTI V trolled design BLDC having permanently lubricated and sealed ball bearings The fan motor assembly is mounted in vibration attenuating rubber grommets Fan speed
175. or unit beyond the first and each additional remote controller will require one group control kit 44 Note Cable may be field supplied for 24 48 MBh 4 Way Ceiling Cassettes TM TN TP frames Wired Remote Group Control Extension Cable PZCWRC1 The group control extension cable is used to increase the distance between remote controller and indoor unit or between indoor units and a control group 33 feet of additional cable is provided by this assembly A Note Cable may be field supplied for 24 48 MBh 4 Way Ceiling Cassettes TM TN TP frames when used as an extension between indoor units Mode Selector Switch PRDSBM The wall mounted operating mode selector switch connects to the outdoor unit and allows the user to choose and lock the system operating mode The switch forces the operating mode of the outdoor unit and all associ ated indoor units to cooling heating or fan only 92 CONTROLS Due to our policy of continuous product innovation some specifications may change without notification MULTI V CONTROL PRODUCTS ACCESSORIES Dry Contact Unit PQDSB1 The Dry Contact Unit enables the indoor unit to be controlled and monitored by third party controls by way of a contact closure of one binary input and two binary outputs The binary input is used to start and stop the indoor unit The dry contact accepts a field supplied binary signal from a building automation system timer keycard switch door window switch
176. orrected Outdoor 100 lt 100 Unit Cooling Capacity Heating Peak Load COR i Actual Corrected Outdoor 100 lt 100 Unit Heating Capacity The outdoor unit selected should be large enough to offset the total cooling block load for all spaces served by the VRF system during the peak cooling load hour on the cooling design day account for the ventilation cooling load if ventilation air is not pretreated to room neutral conditions Therefore the corrected cooling capacity ratio SYSTEM ENGINEERING 49 TWNNVI ONIYSANIDNS LINN ONISNSGNOD did 1VIH SA 4 FAREM system Engineering EQUIPMENT SELECTION PROCEDURE ARUN 036 047 053 CCRA og should never exceed 100 Ifthe CCRA ag exceeds 100 increase the size of the outdoor unit or change the system design by moving some of the building load and associated indoor unit s to another Multi V system The outdoor unit should also be large enough to offset the sum of the building s space heating loads without consideration for building diversity In Heating mode it is typical that all spaces served by the system will peak simultaneously in the early morning thus build ing diversity should never be considered If the corrected heating capacity ratio CCR exceeds 100 increase the size of the outdoor unit or change the system design by moving some of the building load to another Multi V system Determine the System Combination Ratio CR The system s CR compares the no
177. ors furnishing HVAC control systems to the marketplace LG supports the open protocol environment with unique gateway solutions that provide seamless end to end integration of third party BACnet and LonWorks based building management systems with the full portfolio of Multi V air conditioning products This gateway architecture significantly reduces costly device to device wiring and concentrates the technology to a single point of connection for ease of use and service LonWorks Gateway PQNFB16A1 The LonWorks Gateway provides Table 39 LonWorks Control Monitor open n two way communication C N n between LG s Multi V air conditionin i e 7 l a 9 Point Description Monitor products and various building automa tion systems to control and monitor up Unit Operation oe en to 64 indoor units Operating Mode Auto Heating Cooling Fan Dry Auto Heating Cooling Fan Dry An embedded web server facilitates Fan Speed Auto Low High Very High Auto Low High Very High troubleshooting and remote diagnostics Temperature Setpoint ee Rean E PEE 07 Seres as an alternative method for Zone Controler Lock de eateries building management system is offline A 1 Must be communicated across Gateway in EworCods o a S E 2 Only applies to indoor unit models with discharge louvers 3 Room temperature value is reported in degrees Celsius C TVNNVI ONINSANIDNE LINN DNISNIONO9 did 1VIH SA VA FAREA BACnet Gateway PQNFB17B0 The BACnet G
178. own in Figure 46 Support Y Branch and Header fittings as shown in Figure 47 and Figure 48 Figure 45 Typical Pipe Sup port Change in Pipe Direction ri Figure 46 Pipe Sup port at Indoor Unit Figure 47 Pipe Support at Y Branch Fitting Max 12 Max 12 Figure 48 Pipe Support at Header MULTI V PIPING DESIGN GUIDE Routing Protecting Refrigerant Pipe A Note Power cables and low voltage control wiring should be separated a minimum of 2 inches to avoid Electro Magnetic Field EMF effects on communications See Figure 49 and Figure 50 When placing multiple outdoor units in the same vicinity a multiple tier pipe cable tray similar to the one shown in Figure 50 may be a good option Position refrigerant pipe power cables and communication cables so they do not impede walking access to the unit or the removal of service access panels Best practice dictates that insulated piping and cables should be properly supported and protected from natural ele ments to prevent deterioration Place pipes cables and wires in a cable pipe tray equipped with a removable weather tight cover Consider Copper Expansion and Contraction on page 67 The minimum size wall sleeve or utility conduit should be sized using the data in Table 28 local code and NEC regulations Size using the most conservative data Figure 49 Single outdoor unit suggested arrangement of Figure 50 Multiple outdoor unit installation suggested arran
179. played diagnostic codes are specific alpha numeric and pro vide the service technician with a reason for the code displayed Condensate Lift Pump The indoor unit comes with a factory installed and wired condensate lift pump capable of providing a minimum 27 5 inch lift from the bottom surface of the unit The lift pump comes with a safety switch that shuts off the indoor unit if condensate rises too high in the drain pan Due to our policy of continuous product innovation some specifications may change without notification Indoor Units 2 Way Ceiling Cassette TL Casing The case is designed to mount recessed in the ceiling and has a surface mounted concentric grille on the bottom of the unit The unit case is manufactured with coated metal and cold surfaces are covered with a coated polystyrene insulating mate rial The case is provided with metal ears designed to support the unit weight on four corners Ears have pre punched holes de signed to accept field supplied all thread rod hangers Architectural Filter Grille The ceiling cassette assembly is provided with an off white ABS polymeric resin archi tectural grille with a tapered trim edge and a hinged spring clip screw less return air filter grille door Fan Assembly and Control The indoor unit has two direct drive cross flow tangential Sirocco fans made of high strength ABS GP 2305 polymeric resin The fan motor is a brushless digitally con trol
180. r based direct digital control algorithm that provides a minimum of three pre programmed fan speeds in the Heating and Fan Only modes and four speeds in the Cooling mode Fan settings are high medium and low The fourth speed in the Cooling mode is a fan power cooling cycle that runs for 30 minutes at high fan speed A chaos setting provides a simultaneous and random change in fan speed and flow direction at the dis charge The fan speed algorithm provides a field selectable fixed speed or auto speed setting that changes the fan speed based on the difference between the controller set point and space temperature Air Filter Return air is filtered with a removable washable pre filter The unit is also equipped with a plasma filter Filter access is from the front of the unit without the use of tools Airflow Guide Vanes 7 15 MBh Standard Models SE The indoor unit is provided with a motor ized oscillating guide vane that automati cally changes the direction of up and down airflow The indoor unit includes factory installed manually adjustable guide vanes that control the side to side direction of discharge airflow SPECIFICATIONS 105 TVWNNVIN ONINSSNIDNA LINN ONISNSGNOD did 1VIH SA SA FAREA Specifications 106 SPECIFICATIONS MECHANICAL SPECIFICATIONS Indoor Units Wall Mounted SE S5 S8 18 24 MBh Standard Models S5 and ArtCool Mirror Models S8 The indoor unit is provided with a motor ized s
181. r the opportunity to eliminate ductwork in the same configuration The system offers zoning without the need for zone damper systems The LG Multi V Mini system s advanced controls provide exceptional build ing dehumidification and temperature control and adapts system operating parameters to the ever changing building load The LG Multi V Mini system is energy efficient and easy to design install and maintain The modular design allows occupants to control their environmental condition providing individualized control of the set point temperature and allows occupants to condition only the zones being used TABLE OF CONTENTS INTRODUCTION ee a alec tea acer diay nha bak cha artes aaa kee poke eae 7 PARC TING CUI NODC lly snena OE A 8 Engineers Advanta dO a ia ciales 9 A cates sek eee cec te aes tig Sate clea etc Deca ales ale ead Bala uae a Seaea i tides 11 Product Features and Benelli tacita 12 UNITE NOMEN AUN ranse a ane oe ca S E E AE A A 13 Ci e o T A A 14 Peroa S Data io 21 COOMA STACY setina E E sei lh nti wate Diet E ase end bc elk cane De artes dee eee 22 A coca NN E A 31 Unt Remgerant Fow Diagram Srorriia ti 40 Outdoor WIND Mo a id oo ti 42 IS TEMENCINEERINC aisan aa loa a 43 BANIN A A O A OA 44 MS COMI OC SES occ acaren ctl are cateate ta can coed ara E E NA eaten mane ban oanneeetne 47 Placement Considerato anssen selene ctgicenus hse a E tia decenk hon ciate automate daateans 54 Clearance REGUIRGICINS Pe O a TEE 56 LATS
182. r unit fan speed slows or stops in response to changes in the space load This may result in captured par ticulate on the filter media being blown back into the conditioned space OA Wall Cap Damper Inline Fan Advantages Occupants control the volume of the ventila tion air manually Useful for historic build ings that have no ceil ing space available for outdoor air ductwork May be used with the full lineup of Multi V indoor units Advantages May require less ductwork if indoor units are placed near outdoor walls or roof deck Controls must be interlocked to shut off the outdoor air supply fan when the space is unoccupied Third party demand control ven tilation controls may be installed in order to regulate outdoor intake based on the CO levels of the occupied space Indoor Unit 4 Ventilation Kit Front Panel Due to our policy of continuous product innovation some specifications may change without notification Disadvantages In some locations it may be difficult to control humidity levels when windows are open Thermal comfort levels may be substandard when windows are open Indoor units may have to be oversized to account for the added heat ing and cooling loads when windows are open Provides outdoor air to perimeter spaces only Additional mechanical ventilation system may be required to satisfy requirements for interior spaces Outdoor air loads may be difficult to calcu
183. ram for developing high performance sustainable buildings Based on well founded scientific standards LEED emphasizes state of the art strategies for sustainable site development water and energy conservation and a guide for selecting construction materials that are easily renewable and manufactured to promote indoor environmental quality Table 42 LEED Green Building Certification Designations LEED 2009 Rating New Construction Existing Buildings Commercial Interiors System Core amp Shell and Schools Operations and Maintenance Certified 40 49 credits 40 49 credits 40 49 credits 50 59 credits 50 59 credits 50 59 credits 60 79 credits 60 79 credits 60 79 credits 80 credits and above 80 credits and above 80 credits and above Products Developed for the LEED Generation The Multi V variable refrigerant flow air conditioning system delivers state of the art energy efficient performance making it easier for the design team to earn LEED certification Choosing LG Multi V in lieu of traditional technologies such as chillers and gas boilers to heat and cool the building can have a positive impact on the design team s pursuit of the LEED credits listed in Table 43 A Note Each LEED credit typically relates to numerous building design variables and building system parameters that as a whole allows the credit to be earned No one product or product manufacturer including LG products can guarantee credits References LEEDO
184. rant R410A The outdoor unit is provided with factory installed components includ ing a refrigerant strainer check valves oil separator accumulator hot gas bypass valve liquid injection valve 4 way revers ing valve electronic controlled expansion valve EEV high and low side charging ports service valves and interconnect ing piping Also included is an integral subcooler assembly consisting of a double spiral tube type heat exchanger and EEV providing refrigerant subcooling modula tion up to 23 F The unit comes factory charged with 6 6 pounds of refrigerant Refrigeration Oil Control The refrigeration oil level in the compres sor is maintained using a two stage oil control system The compressor discharge port is equipped with an oil filtering device designed to restrict oil loss from the compressor The high pressure discharge vapor leaves the compressor and immedi ately enters a centrifugal oil separator that has no moving parts designed to extract oil from the refrigerant gas stream A gravity drain returns captured oil back to the compressor sump The outdoor unit microprocessor is programmed to flush the refrigerant piping system for a minimum period of three minutes after six hours of compressor operation Single Inverter Compressor The outdoor unit is equipped with one hermetic digitally controlled inverter driven rotary compressor The compres sor is specifically designed for the refriger ant provide
185. rared receiver designed to communicate with an LG hand held remote control ler In lieu of wireless remote or factory return air thermistor pluggable connec tion sockets on the microprocessor circuit board accommodate various models of wall mounted local controllers and or a wall mounted remote temperature sensor The unit microprocessor is capable of accepting space temperature readings concurrently or individually from either 1 Wall mounted wired controller s 2 Factory mounted return air thermistor or the optional wall mounted wired remote temperature sensor A single indoor unit has the capability of being controlled by up to two local wired SPECIFICATIONS 109 TVNNVI ONINSSNIDNA LINN ONISNSGNOD did 1VIH SA 4 FAREA Specifications 110 SPECIFICATIONS MECHANICAL SPECIFICATIONS Indoor Units 4 Way Ceiling Cassette TM TN TP TQ TR controllers The microprocessor controls space temperature using the value pro vided by the temperature sensor sensing a space temperature that is farthest away from the temperature set point The microprocessor control provides a Cooling mode test cycle that operates the unit for 18 minutes without regard to the space temperature If the system is pro vided with an optional wall mounted local or central controller displayed diagnostic codes are specific alpha numeric and pro vide the service technician with the reason for the code displayed Condensate Lift Pump The
186. rature falls below setpoint temperature At which point a signal is sent to the outdoor unit to begin the heating cycle The indoor unit fan op eration is delayed until coil pipe tempera ture reaches 76 F Significant airflow is generated when pipe temperature reaches 80 F A field selectable option maintains fan operation for 30 minutes following cool ing cycle operations The unit is equipped with an infrared receiver designed to communicate with an LG hand held remote controller In lieu of wireless remote or factory return air thermistor pluggable connection sockets on the microprocessor circuit board accommodate various models of wall mounted local controllers The unit microprocessor is capable of accepting space temperature readings concurrently or individually from either 1 Wall mounted wired controller s 2 Factory mounted return air thermistor A single indoor unit has the capability of being controlled by up to two local wired controllers The microprocessor controls space temperature using the value pro vided by the temperature sensor sensing a space temperature that is farthest away from the temperature set point The microprocessor control provides a Cooling mode test cycle that operates the unit for 18 minutes without regard to the space temperature If the system is pro vided with an optional wall mounted local or central controller displayed diagnostic codes are specific alpha numeric and pro vide the
187. rature range For more information on how to properly size a ventilation air pretreatment system refer to the article Selecting DOAS Equipment with Reserve Capacity by John Mur phy published in the ASHRAE Journal April 2010 Select the Indoor Unit s Determine how many indoor units will be required Refer to Table 1a to obtain the maximum number of indoor units allowed on a system If an indoor unit will serve more than one space i e ducted indoor unit or cassette equipped with up to two side branch ducts combine the space and ventilation loads for all rooms served If the quantity of indoor units exceeds the maximum al lowed for the outdoor model selected consider increasing the size of the outdoor unit or split the indoor units into two groups served by separate outdoor units Calculate the entering mixed air conditions for each indoor unit The mixed air temperature must be between 57 F and 76 F WB in Cooling mode and between 59 F and 80 F DB in Heating mode A Note When the indoor unit entering air temperature is outside the cataloged operational limits the system may continue to operate properly however operational abnormalities may occur These include coil frosting low or high suction temperature low or high head pressure low heating discharge temperature or complete system shutdown To calculate the indoor unit entering mixed air temperature RAT x RA OAT x 0A 100 Where MAT MAT Mixed air
188. ring LATS Multi V Pipe System Design Tool LATS Multi V The proper design and installation of the refrigerant piping system is a critical element of the Multi V system Multi V Mini requires two pipes between system components a liquid line and a vapor line A properly designed refrigerant piping system ensures that refriger ant is delivered to the evaporator coil s electronic expansion valve EEV in a pure liquid state free of gas bubbles A proper design also ensures a sufficient refrigerant gas flow rate in the vapor line that eliminates the possibility of refrigeration oil from collecting in the vapor line The piping system can be engineered manually using the procedure outlined in the Layout Procedure on page 60 however the preferred method is to design the system using LG s LATS Multi V software LATS Multi V is a Windows based application that assists the engineer in the design of the refrigeration distribution pipe system verifies the design complies with most pipe design limitations ap plies selected capacity correction factors and calculates the system refrigerant charge Adjusting LATS Multi V Output for Altitude When a system is installed at elevations significantly above sea level the designer must also consider the impact air density has on the capacity of the indoor and outdoor units An altitude correction factor must be manually applied to the indoor and outdoor unit data provided in the LATS report or tree
189. ry mounted return air thermistor or the optional wall mounted wired remote temperature sensor The microprocessor controls space temperature using the value provided by the temperature sensor sensing a space temperature that is farthest away from the temperature set point If the system is provided with an optional local or central controller displayed diag nostic codes are specific aloha numeric and provide the service technician with the reason for the code displayed Handling Condensate The unit is designed to provide gravity draining of condensate LG provides a factory insulated flexible drain hose If condensate lifts oumps are needed for the application they are to be field provided Indoor Units Floor Mounted Uncased CEU CFU Casing The unit case is designed to be concealed in a field provided architectural enclo sure The unit case is manufactured using coated metal Cold surfaces are covered with a coated polystyrene insulating mate rial The back plane of the unit has two side mounting flanges with bolt holes for hanging the unit on a vertical wall near the floor Airflow is vertical from the bottom to the top A polymeric resin coated metal safety grille is provided behind the remov able filters located at the return air opening to prevent reach access to the fan wheels MULTI NV Fan Assembly and Control 7 15 MBh The unit has three Sirocco fans mounted on a common shaft and made of
190. s each floor or even each room is completed Multi V technology allows you to pipe far ther by reaching areas of the building that would require the installation of a second system when using traditional direct expansion cooling and heating equip ment Multi V provides the designer with uncompromised pipe system engineering flexibility the longest pipe runs and the largest elevation differences Whether your building is a high rise condominium a hotel a sprawling school or an office complex Multi V is best suited to reach the farthest corners and elevations Due to our policy of continuous product innovation some specifications may change without notification MULTI V MINI Smaller Chases and Plenums The LG Multi V system uses refrigerant piping to move heat resulting in smaller space requirements compared to water piping or air ducts This helps reduce the overall construction and material cost of your building and gives back leasable space Flexible and logical placement of system components shorter pipe lengths and fewer joints lowers installation costs and minimizes potential leaking MULTI NM MINI ENGINEERS ADVANTAGE system Design and Analysis Tools Intuitive Design The LATS LG Air Conditioning Technical Solution Multi V design and layout software provides an intuitive quick and simple method to design a Multi V Mini refrigerant pipe system LATS Multi V checks piping lengths and elevations and
191. sented by a single dual or triple arrangement of outdoor units is monitored by an LG specified and field furnished AC watt hour transduc er that provides a pulse output relative to power consumption Through its two line LCD display the PDI interface is capable of indicating calculated power consumption current power demand and accumulated power consumption over a defined period of time A single PDI interface is required for each system and Features will accommodate dual and triple chassis capacities One PDI per Multi V system Up to 64 indoor units per PDI For convenience power consumption data can be viewed and or downloaded from an AC Smart central Accumulated power consumption controller option card required or through an Intranet or Internet connected ACP controller satisfying display modes kW h remote access requirements Current power demand W Option to accumulate standby power consumption Compatibility with LG AC Smart and ACP Figure 79 ACP Web Interface i A Note A TERP se 1 PDI is a hybrid energy monitoring technology that com hora ie at pe i er bines direct energy measurement with software calcu pre r a Fg lated and apportioned electrical performance data PDI miman ft jam oy a i is not a certified or traceable technology LG and its DERA distribution partners make no claims or guarantees to the nrm an e 5 accuracy of the output data remma an CA CT on lc CEC E CC E PR es 2 A
192. sition the fitting so the take off leg shares the same horizontal plane as the straight thru leg plus or minus 10 as shown in Figure 38c When installed in a vertical configuration position the fitting so the straight thru leg is plus or minus 3 of plum See Figure 38 a and b The first Y Branch kit must be located at least 3 feet from the outdoor unit Provide a minimum of 20 inches between a branch fit ting and any other fitting or indoor unit piped in series to avoid generating refrigerant flow noise into the system It is recommended that when a Y Branch is located in a pipe chase or other concealed space access doors should be provided for access and inspection See Refrigerant Pipe System Insulation on page 73 for pipe system insulation information Y Branch Insulation Each Y Branch kit comes with two clam shell type peel and stick insulation jackets molded to fit the Y Branch fittings as shown in Figure 39 one for the liquid line one for the vapor line 1 Check the fit of the Y Branch clam shell insula tion jacket after the Y Branch is installed 2 Verify there will be no exposed pipe between the end of the Y Branch jacket and adjacent pipe insulation 3 Mark the pipe where the insulation jacket ends 4 Remove the jacket LG Header kits consists of Two Headers one liquid line one vapor line Reducer fittings as applicable Molded clam shell type insulation covers 5 Install field pro
193. splay group e Cooling Range 64 86 F Temperature sensor location Unit Controller e Heating Range 60 86 F Remote Sensor e Mode selection Fan Heat Cool Auto Dry e Error code display during unit or system malfunc e Ventilation mode Heat Exchange Normal Auto tion e Fan speed Low Med High Power Auto e 33 feet of communication cable included e Clock e Wireless Remote Controller Receiver Timer Simple Sleep On Off Weekly Holiday e Power failure compensation 3 hours max e 7 day programmble schedule with setpoint control Function setting for plasma filter electric heat ce ay e External static pressure control humidifier elevation grille ventilation kit and i auxiliary heat option Wed Be A Note _ 1 First indoor unit on will determine mode cooling heating for Multi V mini 2 Availability depends on the indoor unit model being controlled See Table 6 Indoor Units Controls and Options on page 20 3 Requires optional Wired Remote Controller Group Control Kit PZCWRCG3 one per ad ditional indoor unit and or controller max 4 4 Communication cable can be extended to a maximum 164 feet by using the Wired Zone Controller Extension Cable PZCWRC1 max 4 a Due to our policy of continuous product innovation some specifications may change without notification CONTROLS 87 TVNNVIN ONINSANIDNG LINN DNISNIONO9 did 1VIH SA VA VIVIA Controls 88 CONTROLS CENTRAL CONTROLLERS ACAI AC Smart I
194. stem administrators for future improvements and additions to the LG V Net control family Control Variables Monitoring Control State Run Stop Unit operation Run Stop e Mode Cool Dry Fan Auto Heat e Mode change Cool Dry Fan Auto Heat Fan speed Low Medium High Auto e Fan speed Low Medium High Auto e Zone controller lockout Setpoint Lock Mode Lock e Zone controller lockout Setpoint Lock Mode Lock All Lock Discharge louver swing Run Stop Discharge louver swing Run Stop e Room temperature F or C selectable Setpoint temperature F or C selectable Alarm Network Error System Error Error Code e Temperature Setpoint Range Limiting Upper Limit Lower Limit e Temperature setpoint range limiting Upper Limit Lower Limit Indoor unit control Indoor unit monitoring display eye aasal 1 ma ib a ed Wai pl J i if lalmlatell j L E mM La i MIME MAD E sala ala i P aj jz i j leldteleielelelejevelevelelelaleva e f 1 aaa fa el el el ll el IIE CULT Lc aim lala n GG Taped LIL tat PEGAR IAN ANNA A Halili m AC rs Due to our policy of continuous product innovation some specifications may change without notification MULTI Y INTEGRATION SOLUTIONS Open systems architecture ensures product diversity and interoperability among the many vend
195. t f Max 164 feet b If the outdoor unit is mounted above the indoor unit s Total piping length cannot exceed 984 feet a 6 m Outdoor Unit Level difference between ODU and IDU Max 164 feet noth after first branch ax 131 feet h Longest piP rat ual vee A foo Equivalent Max Table 20 Field Supplied Refrigerant Fittings Liquid Line Equivalent Pipe Length Equivalent Pipe Length EE ivalent Pipe ent Copper Tubing Size 0D Standard 90 Elbow tt S y _LomgRadius 90 Elbow Ht s y smee II IO EE A EI EC CI swew Ball Valve The equivalent length of a FULL port ball valve is the physical length of the valve Ignore the valves and treat as straight pipe A full port ball has the same bore diameter as the connected pipe Equivalent pipe length in feet The sum of the actual pipe length plus allocations for pressure drop through elbows and valves located in the liquid line Values are calculated based on formula and factors from www sporlanonline com LG supplied Y Branch and Header fittings must be used Field built Y Branch and Header fittings are not permitted Due to our policy of continuous product innovation some specifications may change without notification SYSTEM ENGINEERING 59 TVANVIA ONIYSANIDNE LINN SNISNSGNOD dNNd 1VIH SA 4 FAREMA system Engineering PIPE LAYOUT PROCEDURE Creating a Balanced Piping System Balancing dampers ball val
196. t their own risk LG Electronics USA Inc takes no responsibility and offers no warranty expressed or implied of merchantability or fitness of purpose if this method fails to perform as stated or intended For a complete copy of Standard 62 1 2010 refer to the American Standard of Heating and Air Conditioning Engineers ASHRAE website at www ashrae org For more information on how to properly size a ventilation air pretreatment system refer to the article Selecting DOAS Equip ment with Reserve Capacity by John Murphy published in the ASHRAE Journal April 2010 Method 1 Decoupled Dedicated Outdoor Air DDOAS Provide a separate dedicated outdoor air system designed to filter condition and dehumidify ventilation air and deliver it directly to the condi tioned space through a separate register or grille This approach requires a separate independent ventilation duct system not associated with the Multi V system A Note Advantages Disadvantages In all installations LG Does not add additional heating or cooling loads to indoor units Ceiling space is required recommends using M 7 to accommodate ductwork ay be used with a full lineup of the indoor units the DDOAS method between the centralized If the outdoor air unit fails the resulting untreated air will be readily noticed by the occupants The outdoor air unit may supply neutral air to the occupied space even when the Multi V indoor unit fan changes speed or cycles on
197. ted wired remote temperature sensor Due to our policy of continuous product innovation some specifications may change without notification A single indoor unit has the capability of being controlled by up to two local wired controllers The microprocessor controls space temperature using the value pro vided by the temperature sensor sensing a space temperature that is farthest away from the temperature set point The micro processor control provides a Cooling mode test cycle that operates the unit for 18 min utes without regard to space temperature If the system is provided with an optional wall mounted or central controller dis played diagnostic codes are specific alpha numeric and provide the service technician with a reason for the code displayed Handling Condensate The unit is designed for gravity draining of condensate LG provides a factory insu lated flexible drain hose If condensate lift pumps are needed for the application they are to be field provided Indoor Units Floor Standing Cased CE CF Casing The case is designed to be free stand ing on the floor against a vertical surface The backplane of the unit allows secure attachment of the unit to a vertical surface Discharge is vertical from the top of the unit with a bottom front return through a toe slot at floor level The discharge opening is covered with an architectural grille The unit is manufactured using coated metal with an off w
198. th me chanically bonded aluminum fins Coils are pressure tested at a minimum of 551 psig Units are provided with either a 45 flare or brazed refrigerant pipe connections Indoor Units Wall Mounted SE S5 S8 Casing Units are designed to mount on a verti cal surface and come complete with an installation mounting template guide and a separate hanging bracket The unit case is manufactured with coated metal Cold sur faces are covered with a coated polystyrene insulating material Case Finishes Standard Models SE S5 The unit case is manufactured using ABS polymeric resin and has a pearl white finish ArtCool Mirror Models SE S8 The unit case has a light grey silver matte finish The front surface of the unit has an architectural flat panel smoked mirror Due to our policy of continuous product innovation some specifications may change without notification finish Optionally at an additional cost interchangeable architectural front panels with a mirrored finish are available in either blue or silver Fan Assembly and Control The unit has a single direct drive cross flow tangential Sirocco fan made of high strength ABS BSN 7530 polymeric resin The fan motor is a brushless digitally con trolled BLDC design with permanently lu bricated and sealed ball bearings The fan motor assembly is mounted in vibration at tenuating rubber grommets The fan speed is controlled using a microprocesso
199. the System as specified by the manufacturer s instruc tions or perform necessary preventive and routine maintenance as defined in LG published documents Routine maintenance includes such procedures including but not limited to cleaning the condensate drain system evaporator and condenser coils cleaning and or replacing of air filters or belts 7 Damage and or failure caused by any supplies or labor provided by any third party service provider that are beyond the terms of this Limited Warranty 8 Damage and or failure caused by a power surge caused by lightning LG MULTI V VRF SYSTEM LIMITED WARRANTY USA and fluctuations in or interruptions of electrical power faulty power supply fire water wind impact damage from projectiles earthquake theft riot or any and all acts of God 9 Damage and or failure caused by im proper wiring installation and handling of the System while in transit or in a storage facility or damage caused by force majeure 10 Damage and or failure caused by Sys tem exposure to corrosive chemical vapors and or liquids 11 Damage and or failure caused by improper application of the System or any component of the System 12 Damage and or failure caused by modi fication and or alteration of the System or any component of the System in order to meet government codes or regulations 13 Maintenance or field provided part s other than those provided by LG such as filters field
200. the power source from entering the outdoor unit 42 PERFORMANCE DATA Due to our policy of continuous product innovation some specifications may change without notification Description CN FLASH oe WRITER Connection for flashing inverter board EPROM Line power connection 208 230 60 1 Neutral power connection 208 230 60 1 fou SYSTEM ENGINEERING Building Ventilation on page 44 Equipment Selection Procedure on page 47 Placement Considerations on page 55 Clearance Requirements on page 56 LATS Multi V Pipe System Design Tool on page 58 Pipe Design Parameters on page 59 Pipe Layout Procedure on page 60 Piping Design Guide on page 63 Jobsite Connections on page 74 Mini Refrigerant Charge on page 76 system Engineering BUILDING VENTILATION MULTI V ASHRAE 62 1 and local codes specify the minimum volume of outdoor air that must be provided to an occupied space Outdoor air is required to minimize adverse health effects and it provides acceptable indoor air quality for human occupants The five methods that can be used with Multi V systems to meet the requirements are summarized here A Note Although we believe that building these ventilation methods have been portrayed accurately none of the methods have been tested verified or evaluated by LG Electronics USA Inc In all cases the designer installer and contractor should under stand if the suggested method is used it is used a
201. tion contact your LG sales representative for assistance MULTI NM MINI Why does LG limit the system design CR to be between 50 and 130 The limitation is best understood by reviewing part of the equipment selection procedure used to pair match a traditional commercial direct expansion air handler with a traditional split system condens ing unit As you may know in order to verify that selected compo nents of a traditional split system are properly matched the system designer generates a cross plot diagram that reveals the saturated suction operating temperature of the system If the evaporator coil is too large or the outdoor unit is too small the system s saturated suction temperature will be too high to adequately cool the compres sor If the evaporator coil is too small or the outdoor unit is too large the system s saturated suction temperature will be too low and the possibility of slugging the compressor with liquid refrigerant exists In summary if a split system is designed using mismatched com ponents where an excessive difference in the heat transfer surface area of the evaporator coil relative to the condenser coil is present the longevity of the system s compressor will be at risk The same refrigeration theory and component matching verification applies to VRF systems However instead of the designer calculat ing the system s saturated suction operating temperature to verify a proper size match between the
202. tiple indoor units that are far apart Y Branches may be more economical See Table 37 and Table 38 on page 83 for Header kit specifications and capacity Install Headers in a horizontal and level position with the distribution ports of the fitting in the same horizontal plane as the straight thru branch as shown in Figure 41 When connecting indoor units to a Header it is best practice to connect the unit with the largest nominal capacity to the port closest to the outdoor unit Then install the next largest indoor unit to the next port working down to the smallest indoor unit Avoid skipping ports See Figure 40 All indoor units must be mounted at an elevation below the Header fitting All indoor units connected to a single Header fitting should be located with an elevation difference between connected indoor units that does not exceed 49 feet If indoor units are located at an elevation the same as or above the Header fitting do not use a Header Instead install a Y Branch fitting between the outdoor unit and the Header fitting and connect the elevated indoor unit to the Y Branch Field supplied insulation MULTI V Figure 40 Header Kit Largest IDU Figure 41 Header Kit Must be installed level with no rotation Header Inlet Detail A Figure 40 Header Fitting Installation End View Header Insulation Each Header kit comes with two clam shell type peel and stick insula tion jackets molded to fit e
203. tors Units are furnished with two direct drive propeller fans providing horizontal airflow from the rear and discharging from the front of the unit Fan blades are 20 inch diameter balanced and made of durable Lupos ABS polymeric resin Motors are designed to operate between 430 and 700 RPM in Cooling mode and between 500 and 750 RPM in Heating mode Both fans are driven by digitally controlled inverters that vary the fan speed Motors are brush less digitally controlled BLDC and have permanently lubricated and sealed ball bearings All outdoor unit fans are con trolled by an inverter drive mounted near the main microprocessor The outdoor unit fan speed is controlled using an algorithm that provides three pre programmed fan speeds DIP switch adjustable settings lim it night time off peak fan speed to reduce fan generated noise by up to 10 dB A Outdoor Unit Controls Outdoor units are factory wired with neces sary electrical control components printed circuit boards thermistors sensors termi nal blocks and lugs for power wiring The control wiring circuit is low voltage and in cludes a control power transformer fuses and interconnecting wiring harness with plug connectors Microprocessor based algorithms provide component protection soft start capability refrigeration system pressure and temperature control defrost and ambient control The unit is designed to provide continuous compressor opera tion from
204. ts on page 82 and Header Kits on page 83 Add additional insulation if necessary Check the fit of the insulation jacket provided with the LG Y Branch and Header kits after all pipes are brazed to fittings Mark all pipes at the point where the insula tion jacket ends Remove the jacket Install field provided insulation on pipes segments first Then install the LG provided insulation plugs on the ends of all unused Header ports Then apply clamshell insulation on jackets to Y Branches and Header fittings Peel the adhesive glue protector strips from the insulation jacket and install the clam shell jacket over the fitting TWNNVI ONIYSANIDNE LINN ONISNSGNOD did 1VIH SA 4 FAREMA SYSTEM ENGINEERING 73 system Engineering JOBSITE CONNECTIONS ARUN 036 047 053 Figure 54 System Figure 55 Figure 56 Power Wire Terminations Control Board Communication L1 left Ground Termination L2 center Earth Gnd right Figure 57 Communication Cable Separated from Power Wiring Figure 58 Refrigerant Pipe Connection Point i I D i ee as Figure 59 Refrigerant Pipe and Electrical Knockouts 2 ous Noesen a a f Fused Disconnect provided by others r F 2 A Note MULTI NM Power Wiring Route control wiring and power wir ing in separate conduits All wiring must conform to NEC and local codes Unit disconnect and wiring is field supplied Communicati
205. uilding comfort In most cases in lieu of using the factory mounted return air thermistor on indoor units a remote wall temperature sensor or zone controller will be needed for each indoor unit to provide an accurate reading of the conditioned area temperature SYSTEM ENGINEERING 49 system Engineering BUILDING VENTILATION MULTI NM Method 4 Unconditioned Outdoor Air Non Ducted Fan Assisted Ventilation When approved by local codes the fan assisted ventilation method uses exhaust fans to remove air from the building and outdoor air is drawn into occupied spaces through a wall louver or gravity roof intake hood Supply fans can also be used to push the outdoor air into the space and building positive pressure will vent the exhaust air through louvers or roof mounted exhaust hoods Outdoor air is neither cooled nor heated before entering the building A Note This may result in loss of building pres surization control increasing infiltration loads with adverse effects Advantages Disadvantages In some locations of the country it may be difficult to control humidity levels while outdoor air louvers hoods are opened Outdoor air may be manually controlled by the occupant or automatic controls may be installed to open close outdoor air dampers or to turn on off ventilation fans Useful for large open spaces like warehouses garages and workshops Thermal comfort levels may be substandard when louvers hoods are
206. up down direc tion with the capability of locking the vanes in a field adjusted fixed position Microprocessor Controls The unit is provided with an integrated microprocessor controller capable of per forming functions necessary to operate the system without the use of a wall mounted controller A temperature thermistor is factory mounted in the return air stream All unit operation parameters exclud ing the operation schedule are stored in non volatile memory resident on the unit microprocessor Operating schedules are stored in select models of the optional wall mounted local or central controller The field supplied communication cable between the indoor unit s and outdoor unit is to be a minimum of 18 AWG 2 conductor stranded and shielded cable RS485 terminated via screw terminals on the control boards The microprocessor control provides the following functions self diagnostics auto restart following power restoration test run and will operate the indoor unit using one of five operating modes Auto Changeover Heating Cooling Dry Fan Only aS Da m The Auto Changeover setting automatically switches control of the indoor unit between Cooling and Heating modes based on space temperature conditions Heated or cooled air delivery is depen dant upon outdoor unit operating mode MECHANICAL SPECIFICATIONS Indoor Units 2 Way Ceiling Cassettes TL In Heating mode the microprocessor control
207. utdoor ambient wet bulb temperature is between 4 F and 60 F indoor and outdoor unit Power Input PI in kW and includes compressor s and outdoor fan motor s MBh Net Capacity R410A 60 Hz Due to our policy of continuous product innovation some specifications may change without notification PERFORMANCE DATA 3 al Performance Data PERFORMANCE DATA Heating Capacity 4 0 Ton MULTI Y Table 11c ARUN047GS2 Heat Pump Nominal Heating Capacity Outdoor Air Combination MBh PI MBh 33 6 33 6 34 8 34 8 5 0 39 0 39 0 100 90 416 42 2 15 0 44 6 43 5 20 0 46 3 43 9 25 0 46 3 43 9 70 30 0 46 3 43 9 35 0 46 2 43 9 40 0 46 3 43 9 45 0 46 3 43 9 47 0 46 3 43 9 50 0 46 3 43 9 55 0 46 3 43 9 46 3 43 9 4 33 4 33 4 34 7 34 7 5 0 38 8 37 6 100 90 396 37 6 15 0 39 6 37 6 20 0 39 6 37 6 25 0 39 6 E 30 0 39 6 37 6 35 0 39 6 37 6 40 0 39 6 37 6 45 0 39 6 37 6 47 0 39 6 37 6 50 0 39 6 37 6 55 0 39 6 37 6 39 6 37 6 4 33 0 31 4 33 0 31 4 5 0 33 0 31 4 100 90 330 31 4 15 0 33 0 31 4 20 0 33 0 31 4 25 0 33 0 31 4 50 30 0 33 0 31 4 35 0 33 0 31 4 40 0 33 0 31 4 45 0 33 0 31 4 47 0 33 0 31 4 50 0 33 0 31 4 55 0 33 0 314 209 33 0 31 4 202 Capacity rated using ISO 5151 Test Rating Standard for Non Ducted Heat Pumps e Ratio KR 4 29 4 33 4 26 3 95 3 90 3 86 3 83 STA 3 54 3 43 3 29 SH 3 09 ZN 2 88 9192 4 29 4 53 4 36 4 00 3 74 3 40 3 19 2 98 2
208. ve A properly sized sleeve pre is prohibited and may result in a system malfunction or failure to work at vents the compression of refrigerant pipe insulation and allows all the pipe to move freely within the sleeve i Pipe Bends Figure 52 Typical pipe penetration Use long radius bends when bending soft copper Refer to Table 26 on page 69 for minimum radius specifications Sealant Pipe Insulation Installation of Refrigerant Pipe Brazing Practices Wall Sleeve 1 LG indoor and outdoor units contain capillary tubes orifices electronic controlled expansion valves oil separators and heat exchangers that can easily become blocked if debris such as copper burrs slag and carbon dust is introduced to the pipe system during installation Keep the piping system free of contaminants Filter dryers cannot be used Underground Refrigerant Piping Refrigerant pipe installed underground should be routed inside a vapor tight protective sleeve to prevent insulation deterioration and water infiltration Refrigerant pipe installed inside under ground casing should be continuous without joints Under a Store pipe stock in a dry place ground refrigerant pipe and conduit must be located at a level b Keep stored pipe capped and clean below the frost line c Blow all pipe sections clean with dry nitrogen prior to assembly d De bur and clean all cuts before assembly Table 28 Utility Conduit Sizes ma Vapor Pipe 2 Proper system oper
209. ves orifices circuit setters or other flow control devices cannot be used to modify or balance the flow of refrigerant in a VRF piping system Therefore variable refrigerant flow systems must be designed to be self balanced Pipe sizing considerations include pipe length pipe segment pressure drop relative to other pipe segments in the system type and quantity of elbows bends present fitting installation orientation and indoor unit elevation differences Balanced liquid refrigerant distribution is solely dependent on the designer choosing the correct pipe size for each segment It is imperative the designer avoids creating excessive pressure drop In the liquid line the pipe system must be designed in a manner that avoids the creation of unwanted vapor When liquid re frigerant is subjected to excessive pressure drop the refrigerant will change state and flash to vapor If vapor bubbles form in a stream of liquid refrigerant before reaching the electronic expansion valve EEV loss of system temperature control and EEV valve damage may Occur Handling Field Piping Changes Any field changes such as rerouting shortening or lengthening a pipe segment adding or eliminating elbows and or fittings re sizing adding or eliminating indoor units changing the mounting height or moving the location of a device or fitting during installation should be done with caution and always verified in LATS Multi V before piping supplies
210. vided insulation on the 3 pipes first 6 Peel the adhesive glue protector slip and install the clam shell jacket over the fitting Figure 37 Y Branch Connections To IDU To Figure 38 Y Branch installation alignment specification a Vertical Up Configuration b Vertical Down Configuration c Horizontal Confiquration End View Straight Through Leg Branch Leg i Horizontal Plane a 10 Figure 39 Y Branch Insulation and Pipe Detail LG Supplied Insulation Jacket LG Supplied Y Branch Fitting Field Supplied Insulation WEERAL RIITAA E a EDES LER PERE CE AA Field Supplied Copper Pipe SYSTEM ENGINEERING 63 L TWNNVIW 9NIYIINI NI LINN SNISNSGNOD did 1VIH SA 4 FAREMA System Engineering PIPING DESIGN GUIDE LG Engineered Y Branch and Header Kits Header Kits A Note Y Branches can be installed upstream between the Header and the outdoor unit but a Y Branch cannot be in Stalled between a Header and an indoor unit To avoid the potential of uneven refrigerant distribu tion through a Header fitting minimize the difference in equivalent pipe length between the Header fitting port and each connected indoor unit 64 SYSTEM ENGINEERING Header kits are intended for use where multiple indoor units are in close proxim ity to each other or where it would be more economical to home run the run out pipe segments back to a centralized location If connecting mul
211. weeping guide vane that automati cally changes the direction of airflow from side to side and up and down Microprocessor Control The unit is provided with an integrated microprocessor controller capable of per forming functions necessary to operate the system without the use of a wall mounted controller A temperature thermistor is factory mounted in the return air stream All unit operation parameters exclud ing the operating schedule are stored in non volatile memory resident on the unit microprocessor Operating schedules are stored in select models of the optional wall mounted local or central controllers The field supplied communication cable between the indoor unit s and outdoor unit is to be a minimum of 18 AWG 2 conductor stranded and shielded cable RS485 terminated via screw terminals on the control boards The microprocessor control provides the following functions self diagnostics auto restart following power restoration test run and will operate the indoor unit using one of five operation modes 1 Auto Changeover 2 Heating 3 Cooling 4 Dry 5 Fan Only The Auto Changeover setting automatically switches control of the indoor unit between Cooling and Heating modes based on space temperature conditions Heated or cooled air delivery is depen dant upon outdoor unit operating mode In Heating mode the microprocessor con trol will activate indoor unit operation when the indoor room tempe
212. wire 15 and 20 kW modules are powered from two power wires Heating module breakers fuses and or discon nects are to be field provided Electric Heat Module Controls The electric heat module is capable of operating at full capacity during system defrost and oil return operations When MECHANICAL SPECIFICATIONS Vertical Horizontal Air Handler NJ NK the air handler is operating in the Cooling Dry or Fan Only modes the electric heater operation is locked out and unavailable When the air handler is operating in the Heating mode the heater is field select able to operate when the room tempera ture is 2 F lower than set point or manually if provided with a start stop signal from a third party outside source Microprocessor Controls The unit is equipped with an integrated microprocessor based controller capable of performing functions necessary to operate the system without the use of a wall mounted controller A temperature thermistor is mounted in the return air stream All unit operating parameters ex cluding the operation schedule are stored in non volatile memory resident on the unit microprocessor Operating schedules are stored in select models of the optional wall mounted local or central controller The field supplied communication cable between the indoor unit s and outdoor unit is to be a minimum of 18 AWG 2 con ductor stranded and shielded RS485 The microprocessor control provides the followi
213. with the outdoor unit fan speed during off peak opera sound levels depend on room conditions and Measurements are taken 4 9 ft above the a tolerance of 3 tion to lower the unit sound power level natural attenuation Due to our policy of continuous product innovation some specifications may change without notification PRODUCT DATA 19 GENERAL DATA MULTI N Acoustical Data Outdoor Units Figure 1 ARUN036GS2 Cooling Figure 2 ARUNO47GS2 Cooling Figure 3 ARUN053GS2 Cooling 80 80 Y o Y o o Oo o Oo o o al o 50 D o S o wo o Octave Band Sound Pressure Level dB re 20yPa Octave Band Sound Pressure Level dB re 20uPa Octave Band Sound Pressure Level dB re 20uPa 20 20 10 10 i 63 125 250 500 1000 2000 4000 8000 63 125 250 500 1000 2000 4000 8000 250 500 1000 2000 4000 8000 Octave Band Center Frequency Hz Octave Band Center Frequency Hz Octave Band Center Frequency Hz 4 Aa 5 Figure 4 ARUN036GS2 Heating Figure 5 ARUNO47GS2 Heating Figure 6 ARUN053GS2 Heating _ O O 80 80 80 pa A 70 70 70 o o o o o o al o al o al o o S o DA o 4 o wo o ee o Octave Band Sound Pressure Level dB re 20yPa Octave Band Sound Pressure Level dB re 20yPa Octave Band Sound Pressure Level dB re 20pPa 20 nm o 20 63 125 250 500 1000 2000 4000 8000 63 125 250 500 1000 2000 4000 8000 Octave Band Center Fr
214. xcluding the unit operating schedule are stored in non volatile mem ory resident on the unit microprocessor Operating schedules are stored in select models of the optional wall mounted local or central controller The field supplied communication cable between the indoor unit s and outdoor unit is to be a minimum of 18 AWG 2 conductor stranded and shielded cable RS485 terminated via screw terminals on the control boards The microprocessor control provides the follow ing functions self diagnostics auto restart following power restoration test run and will operate the indoor unit using one of five operating modes 1 Auto Changeover Heating Cooling Dry Fan Only ole 2 i The Auto Changeover setting automatically switches between Cooling and Heating modes based on room temperature condi tions Heated or cooled air delivery is depen dant upon outdoor unit type and system operating mode In Heating mode the microprocessor control will activate the indoor unit when indoor room temperature falls below set point temperature and signals the outdoor unit to begin the heating cycle The indoor unit fan operation is delayed until coil pipe temperature reaches 76 F Significant airflow is generated when pipe temperature reaches 80 F In lieu of factory return air thermistor pluggable connection sockets on the microprocessor circuit board accom modate various models of wall mounted local controllers and or a
215. y Outdoor Air Indoor Unit Entering Air Dry Bulb Temperature F en P Men Pi Meh Plt Met pl Men Pi penp Pi pend Plt Me Pi DB we o o os ser os sm mo sm mo sr mo srs mo om wr om ms sor EE w KE Combination O Ratio 10 0 10 T 97 E 5 0 5 0 IVANVIA ONIMSSNIDNA LINN SNISNSGNOD dNNd 1WIH SA 4 4 FAREA 50 0 EN 523 430 os 402 470 376 449 as 427 EEN ETS 326 393 305 NN 283 4 4 10 0 EE o om 01 sss o 600 09 se m0 so moo sm 060 ss 007 smo mo oo a on RA o oo ur sw oa so wo sm ws 002 m9 am se 459 o7 am mo m9 gt MEN NN NN EN 364 501 EJ 497 320 497 306 479 206 NEON 280 425 265 MEUS as ser sa smo o6 on 20 os om mo aw 0 oo me am B 50 mo sa m9 2m sa 20m 00 ze wo 2m wos 2m ms 20 00 20 mo 109 oo sso ar aoe ee am 09 am wa 2m 9 2m oso om mr ow wo am uu AE Capacity rated using ISO 5151 Test Rating Standard for Non Ducted Heat Pumps Rated with an equivalent piping length of 24 6 ft and no change in elevation between the Heating mode stable operation is ensured when the outdoor ambient wet bulb temperature is between 4 F and 60 F indoor and outdoor unit Power Input PI in kW and includes compressor s and outdoor fan motor s MBh Net Capacity R410A
216. y devices can be scheduled to start and stop based on building requirements For remote access the AC Smart includes an embed ded web portal for basic online monitoring and control operations e Temperature Limit Maintain space tempera tures during unoccupied time periods e Controls up to 64 devices 128 devices with expansion kit PQCSE440U0 16 systems Set by user configurable equipment groups Support for multiple schedule patterns Calendar based schedule start and end dates Calendar based exception dates for holidays and other observances Device setpoint data display status Display device type Indoor Unit Venti lator AWHP Air to Water Heat Pump On Off Unit Display device by Zones Groups Indi vidual Units Indoor unit average temperature set point Zones Groups Indoor unit average room temperature Zones Groups Tabbed navigation Basic Control Schedule History Auto Control System Setup Model specific not available on all models Availability depends on indoor unit model being controlled See Table 6 Indoor Units Controls and Options on page 20 Due to our policy of continuous product innovation some specifications may change without notification MULTI V CENTRAL CONTROLLERS AC Smart 128 Expansion Kit PQCSE440U0 The AC Smart 128 Expansion kit expands the total control and monitoring capacity of an AC Smart from 64 to 128 devices including Multi V indoor units Pl 485

Engineering Manual - LG HVAC VRF Systems

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