Home

Trane Indirect Fired Make-Up Air Installation and Maintenance Manual

1. 71 Periodic Checklists 77 Note This document is customer property and must be retained by the units owner for use by maintenance personnel FAXA SVX01B EN 3 e TRANE Installation Packaged Fresh Air unit Model Number Description Following is a complete description of the Packaged FAU model number Each digit in the model number has a corresponding code that identifies specific unit options F 040 6GA0 08401 0 1 057 07 A 0 0 0 E F 0 1 000 00 12345567 8 9 10 11 12 13 141516171819 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 Digit 1 Unit model F fresh air unit Digit 2 Unit configuration air cooled Digit 3 Unit discharge direction D downflow H horizontal Digit 4 Development sequence A development sequence A Digits 5 6 7 Unit size 031 2 3100 cfm 040 4000 cfm 051 5100 cfm 066 6600 cfm Digit 8 Unit voltage 3 230 volt 60 hz 3 ph 4 460 volt 60 hz 3 ph 6 208 volt 60 hz 3 ph Digit 9 Heating system 0 none gas low rise single bank 2 stage B gas low rise single bank 2 1 modulate gas high rise single bank 2 stage D gas high rise single banks 2 1 modulate E gas dual bank 4 stage F gas dual bank 4 1 modulate G electric heat 3 stage electric heat 7 stage hydronic interface only Digits 10
2. L T Figure M MP 4 Belt tension gauge WARNING Rotating components Disconnectall electric power including remote disconnects before servicing Follow proper lockout tagout procedures to ensure power cannot be inadvertently energized Failure to disconnect power before servicing can cause death or serious injury FAXA SVX01B EN Maintenance Adjusting Fan Belt Tension To adjust the fan belt tension refer to Figure M MP 6 following the procedure below 1 Loosen bolts on both sides of the sliding motor base 2 Loosen nuts as required for motor horsepower to slide the motor on its mounting plate in the proper direction to add or relieve belt tension 3 Adjust nuts and bolt Do not stretch the belts over the sheaves 4 Retighten all nuts and bolts 5 Verify tension is adjusted properly CAUTION Belt tension Do not over tension belts Excessive tension will reduce fan and motor bearing life accelerate belt wear and possibly cause shaft failure Recommended belt tension range values are on the unit fan scroll To access the fan scroll face the right hand side of the deflection belt span 64 unit and open the supply fan access door The belt tension label is on the top right hand corner of the fan scroll The correct operation tension for a V belt drive is thelowest tension at which the belt will not slip under the peak load conditions It may be necessary to incre
3. Packaged Fresh Air Unit For 100 Outdoor Air Applications Models FADA and FAHA BO and later design sequence April 2003 FAXA SVX01B EN e TRANE About This Manual Literature Change History Use this manual for Packaged Fresh Air units models FADA and FAHA This is the B issue of this manual revised to include the total energy wheel option It provides specific installation operation and maintenance instructions for BO and later design sequences These units have modular DDC controls that provide operating functions signifi cantly different than conventional air conditioning units Refer to the startup and test mode procedures within this manual Also reference the Trane publication Packaged Fresh Air Unit Programming Guide FAXA SVP01B EN For units with gas heat also reference the Reznor Installation Form RGM 401 Installation Operation Service Manual Overview of Manual This manual describes proper installation startup operation and maintenance procedures for the Packaged Fresh Air unit Carefully review the information within this manual and follow the instructions to minimize risk of improper operation and or component damage The roof curb specifically designed for the Packaged Fresh Air unit is available in 14 or 24 height from Trane The curb must be mounted on a permanent roof structure before attempting to install the unit Reference the roof curb installation instruc
4. rla Ira tons rla Ira tons rla Ira dimensional information to ensure 031 208 603 45 15 124 90 35 22 140 48 337 it lectrical requiremen h 230 003 45 15 124 90 31 21 140 43 36 co lis ect Magis ements E 460 003 45 8 596 90 16 117 140 23 1783 Installation site supply power 040 208 003 675 23 164 100 3 22 ib0 5i 3 wiring locations on unit submittals or in 230 603 675 23 164 100 31 251 150 46 36 the Dimensions and Weights section on 460 60 6 75 11 100 100 16 117 150 23 78 13 ific unit wirina diaaram 056 208 603 90 35 222 140 48 337 90 35 22 90 35 222 page 13 un an W d a 230 603 90 31 251 140 43 36 90 3 21 90 31 251 are provided on the inside or the contro 460 60 3 9 0 16 117 23 178 90 90 16 117 panel door Use these diagrams for 066 208603 90 35 222 i 5T 337 15 150 51 337 connections or trouble analysis 230 603 90 31 251 46 3 6 15 15 0 46 3 6 460 603 9 0 16 117 23 178 15 0 23 178 Supply Power Wiring It is the installer s responsibility to provide tons refers to nominal R22 tons power supply wi ring to the unit Wiring electric heat FLA is determined at 208 240 amp 480 volts should conform to NEC and all applicable code requirements To ensure the unit Table I ER 2 Supply fan motor fla supply power wiring is properly sized and po standard efficiency high efficiency installed follow t
5. Drying Mode During unoccupied mode with return air damper option installed the unit enters the drying mode when the zone RH exceeds the unoccupied zone RH setpoint In the drying mode capacity cycles to maintain the supply air drying dew point setpoint The SA drying setpoint can be reset down based on zone relative humidity conditions and will be based on the unoccupied zone RH setpoint Supply air reheat functions are active to maintain the supply air reheat setpoint Supply air reheat reset functions are active and reset based on unoccupied zone setpoints Exhaust fan operation control cycles off during unoccupied modes unless unoccupied economizer operations are active Cooling Mode During unoccupied cooling mode the fan economizer and mechanical cooling cycle to control zone temperature Economizer functions enable when the difference in the enthalpy of the OA and zone is adequate Mechanical cooling supplements economizer capacity as required Heating Mode During unoccupied heating mode fan and heating capacity cycle to maintain the unoccupied zone heating setpoint Zone Dehumidification with Outside Air RH Reference Unit 1 Occupied Sequence During occupied mode the primary function of the unit is to provide ventilation air to the space Upon entering the occupied mode the outside air damper opens and the supply air fan starts Drying Mode The unit enters the drying mode when the zone relati
6. 11 Design sequence factory assigned Digits 12 13 14 Heat input 000 none 020 20 kw 026 26 kW 032 32 kW 042 42 kW 056 56 kW 070 70 kW 084 84 kW 100 100 kW 122 122 kW 125 125 MBh 150 150 MBh 200 200 MBh 250 250 MBh 300 300 MBh 350 350 MBh 400 400 MBh 500 500 MBh 600 600 MBh 700 700 MBh 800 800 MBh Digit 15 Heat exchanger material 0 none 1 409 stainless steel 409 stainless Burner 2 321 stainless steel 409 stainless burner Digit 16 Condenser reheat coil 0 none 1 condenser hot gas reheat coil Digit 17 Ventilation damper type 0 parallel blade damper 1 TRAO damper with air flow measurement Digit 18 Energy recovery 0 none 1 total energy wheel w occupancy control 2 total energy wheel w dry bulb control Digit 19 Return air damper 0 2 none 1 bottom return reference enthalpy 2 bottom return comparative enthalpy Digit 20 Supply fan type 12 9 centrifugal fan B 15 11 centrifugal fan 18 13 centrifugal fan Digits 21 22 23 Supply fan rpm 037 375 972 725 040 400 075 750 042 425 977 775 045 450 080 800 047 475 082 825 050 500 085 850 052 525 087 875 055 550 090 900 057 575 992 925 060 600 095 950 062 625 097 975 065 650 100 1000 067 675 102 1025 070 700 405 1050 Note The first number in this description indicates the fan wheel diameter in The second
7. 500 NPT INTERNAL NATURAL GAS 600 800MBH 9 750 NPT INTERNAL GAS CONNECTION SINGLE GAS HEATER NATURAL GAS 125 250MBH 500 NPT INTERNAL NATURAL GAS 300 400MBH 750 NPT INTERNAL 16 FAXA SVX01B EN e TRANE Installation Unit base plan view duct openings amp thru base power openings unit sizes 031 amp 040 unit without TE wheel 16 2 1 8 12 7 3 4 1 1 5 8 OPTIONAL ELECTRIC HEAT DUAL SOURCE POWER WIRING ENTRANCE W 208 OR 240V 42 56 70 84 KW ONLY HOLE 3 00 4 7 7 8 11 1 8 10 3 8 RETURN OPENING Z OPTION T 10 5 8 10 3 8 SUPPLY OPENING EXHAUST OPENING OPTION 7 7 8 N UNIT CONTROL BOX SEE DETAIL A unit with TE wheel 21 6 1 8 1 1 5 8 12 7 3 4 6 2 3 8 PTIONAL ELECTRIC HEAT DUAL SOURCE POWER WIRING ENTRANCE W 208 OR 240V 11 1 8 42 56 70 84 KW ONLY HOLE 3 00 7 3 8 10 3 8 RETURN OPENING OPTION j SUPPLY OPENING INLET 8 5087 HOOD 3 3 1 8 i d EXHAUST OPENING OPTION 1 27 UNIT CONTROL BOX 5 11 7 8 SEE DETAIL A FAXA SVX01B EN 17 e TRANE Installation Unit base plan view duct openings amp thru base power openings unit sizes 051 amp 066 unit without TE wheel 16 2 1 8 1 6 1 2 11 11 3 8 OPTIONAL ELECTRIC HEAT DUAL SOURCE POWER WIRING ENTRANCE W 208 OR 240V 70 84 KW ONLY HOLE 93 000 W 208 OR 240V
8. and D 1K4 can run concurrently with 1 of three stage electric heat or of seven stage electric heat For units using heaters less than 50 kW MCA 1 25 x load 1 load 2 load 4 1 25 x load 3 For unit using heaters equal to or greater than 50 kW MCA 1 25 X load 1 load 2 load 3 load 4 Select the nameplate MCA value that is the largest of the three sets of MCA calculations 2 25 x load 1 load 2 load 3 load 4 Select an overcurrent protective device 37 e TRANE 38 Installation rating equal to the MOP value If the MOP value does not equal a standard device size as listed in NEC 240 6 select the next lower standard device rating If the next lower standard rating is less than 125 of the current rating of the electric heater load select the next higher standard device rating If the selected MOP is less than the MCA then reselect the lowest standard device size which is equal to or larger than the MCA pro vided the reselected device size does not exceed 800 amps The MOP value selected should be the largest of the three sets of MOP value calculations Disconnect Switch Sizing DSS if field provided and installed If the unit is ordered with a factory installed non fused disconnect switch this sizing equation is not necessary If the disconnect is to be field provided and installed use the following equation to determine its rating DSS 1 15 x load 1
9. e TRANE Service Access Maintain adequate clearances around and above the fresh air unit to ensure proper unit operation and allow sufficient service access See Figure l PC 1 for recommended clearances If installing the unit higher than the typical curb elevation field construct a catwalk around it to provide safe easy maintenance access WARNING Hazardous voltage Disconnect electrical power source and remote disconnects before servicing unit Follow proper lockout tagout procedures to ensure power cannot be inadvertently energized Failure to do so may cause death or injury warnine Disconnect gas supply Before servicing unit FIRST turn off the gas supply Failure to turn off the gas supply can cause death or serious injury nin Combustible materials Maintain proper clearance between the unit heat exchanger vent surfaces and combustible materials Refer to this manual for proper clearances Improper clearances can cause a fire hazard Failure to maintain proper clearances can cause death serious injury or property damage Installation air pat Figure I PC 1 Top view of fresh air unit showing recommended service and code clearances unit without TE wheel gas or electric I Service access INLET HOOD air path into unit 1 ONTROL PANEL r L condenser airflow and compressor maintenance unit with TE
10. remote panel Connect the white lead to the positive terminal the black lead to the negative terminal and the bare shield wire to the terminal at the remote human interface panel Close the key pad plate Install and tighten the two screws removed earlier Close the outer door and install the recessed locking screw at the bottom right hand side of the enclosure to prevent accidental starting of the unit by unauthorized personnel while completing the wiring at the self contained unit At the fresh air unit connect the opposite end of the three conductor 24 volt wire to the appropriate terminal strip as follows Remote Display End Connected the two insulated leads to the Remote Panel Note Although the 24 volt power is not polarity sensitive do not connect either the plus or minus terminals from the remote panel to ground at the fresh air unit 1 Connect the wire connected to the positive terminal at the remote panel 2 Connect the wire connected to the negative terminal at the remote panel 3 Connect the ground wire from the remote panel to the unit control panel casing Interprocessor Communication Bridge Module Wiring Refer to Figure I IP 8 and trim the outer covering of the shielded cable back approximately one inch Cut the bare shield wire off even with the outer covering Strip approximately 2 inch of insulation from each insulated wire in order to connect them to the termin
11. 2 wiring guidelines 43 wiring the remote human interface 49 Z zone sensor installation 43 FAXA SVX01B EN c UL US TRANE Literature Order Number FAXA SVX01B EN File Number PL AH FAXA SVX01B EN 0403 Supersedes FAXA SVXO1A EN 1201 a business of American Standard Inc WA tari corn Stocking Location LaCrosse Inland For more information contact your local office or e mail comfort trane com Trane has a policy of continuous product improvement and reserves the right to change design and specifica tions without notice Only qualified technicians should install and service equipment
12. 2 10 5 8 3 3 1 8 7 1 3 4 Z 2 2 5 4 2 3 X 10 3 4 5 5 4 c 1 3 1 4 2 4 3 5 8 1 1 2 7 3 8 4 2 7 10 1 2 12 11 1 4 20 9 6 WOOD NAILER 4 WOOD NAILER d FAXA SVX01B EN 25 e TRANE Installation Standard curb unit sizes 051 amp 66 without TE wheel EXHAUST OPENING OPTION RETURN OPENING OPTION THRU BASE ELECTRIC HEAT OPTION SUPPLY OPENING CONTINUOUS WOOD NAILER THRU BASE ELECTRICAL ENTRANCE 4 1 8 5 1 2 3 7 1 8 7 1 3 4 6 WOOD NAILER d 26 FAXA SVX01B EN e TRANE Installation Standard roof curb unit sizes 051 amp 066 with TE wheel EXHAUST OPENING OPTION RETURN OPENING OPTION THRU BASE ELECTRIC HEAT OPTION SUPPLY OPENING CONTINUOUS WOOD NAILER THRU BASE ELECTRICAL ENTRANCE 11 11 3 8 12 11 1 4 20 9 6 WOOD NAILER FAXA SVX01B EN 27 e TRANE Installation Extended height roof curb unit sizes 031 amp 040 without TE wheel EXHAUST OPENING OPTION RETURN OPENING OPTION THRU BASE ELECTRIC HEAT OPTION SUPPLY OPENING 5 3 4 12 7 3 4 3 10 5 8 1 1 5 8 Em 2 93 5 3 4 3 1 4 2 10 5
13. 30 3 0 Reference Figures I DW 3 and I DW 4 360602 ale o Peur bw Vier 7 on pages 16 17 for the electrical service entrance location 4 Complete the unit power wiring connections onto either the main terminal block or the factory mounted 201 Ap non fused disconnect switch located in 460 60 3 326 control panel 5 Provide proper unit grounding in accordance with local and national Table I ER 6 Factory wired convenience outlet voltage amps Table I ER 7 total gas heat amps with combustion blower codes voltage amps 208 60 3 2 54 230 60 3 2 30 460 60 3 1 15 Table I ER 8 Control power transformer loads greater than 1 amp voltage amps 208 60 3 1 20 230 60 3 1 09 36 FAXA SVX01B EN Power Wire Sizing and Protection Device Equations Each type of unit has its own set of calculations for MCA minimum circuit ampacity and MOP maximum overcurrent protection For units with multiple modes of operation you must consider each individual field wired hazardous voltage circuit Use the load that provides the highest value in the applicable circuit To correctly size the unit s electrical service wiring read the load definitions that follow and then find the appropriate set of calculations based on your unit type Load Definitions Load 1 current of the largest motor compressor or fan motor Load 2 sum of the currents of all remaining motors Load 3 current of electric heaters Load 4 con
14. 66 4 81 4 28 3 91 3 54 3 34 3 11 2 92 2 63 2 38 2 18 2 04 1 1 049 680 465 375 320 285 260 240 220 205 195 175 160 145 135 27 19 3 13 2 10 6 9 06 8 07 7 36 6 80 6 23 5 80 5 52 4 96 4 53 4 11 3 82 11 1 380 1400 950 770 660 580 530 490 460 430 400 360 325 300 280 35 39 6 26 9 21 8 18 7 16 4 15 0 13 9 13 0 12 2 11 3 10 2 9 20 8 50 7 93 15 1 610 2100 1460 1180 990 900 810 750 690 650 620 550 500 460 430 41 59 5 41 3 33 4 28 0 25 5 22 9 21 2 19 5 18 4 17 6 15 6 14 2 13 0 12 2 2 2 067 3950 2750 2200 1900 1680 1520 1400 1300 1220 1150 1020 950 850 800 53 112 77 9 62 3 53 8 47 6 43 0 39 6 36 8 34 5 32 6 28 9 26 9 24 1 227 21 2 469 6300 4350 3520 3000 2650 2400 2250 2050 1950 1850 1650 1500 1370 1280 63 178 123 99 7 85 0 75 0 68 0 63 7 58 0 55 2 52 4 46 7 42 5 38 8 36 2 3 3 068 11000 7700 6250 5300 4750 4300 3900 3700 3450 3250 2950 2650 2450 2280 78 311 218 177 150 135 122 110 105 97 7 92 0 83 5 75 0 69 4 64 6 4 4 026 2300 15800 12800 10900 9700 8800 8100 7500 7200 6700 6000 5500 5000 4600 102 651 447 362 309 275 249 229 212 204 190 170 156 142 130 Note 1 ft 5 hr input 1000 For SI convert Btu hr to kW m hr input kW x 0 0965 2 Size natural gas select pipe directly from the table 34 FAXA SVX01B EN FAXA SVX
15. Attach corner angle 8 using eight sheet metal screws to end rail 2 and side rail 4 Place the clearance holes in the corner angle toward the top of the curb 5 Attach corner angle 9 using eight sheet metal screws to end rail 2 and side rail 5 Place the clearance holes in the corner angle toward the top of the curb 6 Align side rail 6 next to side rail 5 and attach crossmember 11 perpendicular to both side rails at the joint using eight sheet metal screws 7 Attach corner angle 10 using eight sheet metal screws to end rail 1 and side rail 6 Place the clearance holes in the corner angle toward the top of the curb Return and Exhaust Air Opening Assembly 8 Place end rail 12 between side rail 3 and side rail 6 with flanges positioned away from the return air opening and attach it with two sheet metal screws at each end Use rails 14 15 16 and 17 as spacers 9 Place side rail 14 between end rail 1 and end rail 12 with flanges positioned away from the return air opening and attach it with two sheet metal screws at each end 10 Place side rail 15 between end rail 1 and end rail 12 with flanges positioned toward the return air opening and attach it with two sheet metal screws at each end 11 Place side rail 16 between end rail 1 and end rail 12 with flanges positioned away from side rail 15 and attach it with two sheet metal screws at each end 12 Place side
16. CAPABLE OF SUPPORTING THE ENTIRE UNIT WEIGHT Figure HP 2 Proper fresh air unit rigging and handling for units without the total energy wheel option LIFTING POINT A MUST BE ALIGNED DIRECTLY OVER UNIT CENTER OF BALANCE FOR A LEVEL LIFT 8FT MINIMUM SHORTER LENGTHS MAY CAUSE LIFTING INSTABILITY USE HOOKS IN LIFTING HOLES LABELS INDICATE APPROX CENTER OF BALANCE LOCATION ALONG THE LENGTH OF THE UNIT Figure I IP 3 Proper fresh air unit rigging and handling for units with the total energy wheel option 41 e TRANE Exhaust Louver Installation Install the exhaust louvers after installing the unit in its final position following the procedure below 1 Remove the temporary shipping panel from the exhaust exit 2 Locate the shipped with gravity damper in the main filter compartment A ship with item label indicates the door 3 Install the gravity damper so the the damper blades close in a downward motion 42 Installation EXHAUST DAMPER J 1 KL L LL I LIFTING HOLES CONTROL PANEL Dr ACCESS DOOR 26 x 57 FILTER ACCESS DOOR REHEAT A 29 X 57 40 X 52 MAIN COMPRESSOR COIL ACCESS 54 52 FAXA SVX01B EN FAXA SVX01B EN Installation e TRANE Zone Sensor Installation for Temperature and Humidity All remote sensor options ship in the return air filter section and require field installation Mounting Location Mount
17. INTERFACE REHEAT COMPRESSOR COIL ACCESS PANEL COILACCESS ACCESS DOOR 34x36 PANEL 68x36 UNIT CONTROL PANEL MAIN POWER WIRING ENTRANCE CAN ALSO BE RUN THRU BASE 24VOLT CONTROL CIRCUIT WIRING ENTRANCE CAN ALSO BE RUN THRU BASE DUAL GAS HEAT ACCESS PANEL EACH HEATER HAS SEPARATE PANEL 16x23 INLET HOOD GAS CONNECTION DUAL GAS HEAT EACH HEATER HAS SEPARATE GAS CONNECTIONS NATURAL GAS 250 400 MBH 2 500 NPT INTERNAL CONDENSATE DRAIN CONNECTION FILTER AND DAMPER ACCESS DOOR 25x39 ELECTRIC HEAT POWER WIRING ENTRANCE ALSO CAN BE RUN THRU BASE EVAP COIL AND CONDENSATE DRAIN PAN ACCESS DOOR 18x34 ELECTRIC HEATER ELECTRICAL PANEL 24x30 OR GAS HEAT PANEL 16x23 OR FIXED PANEL FOR NO HEAT OPTION OR HYDRONIC HEAT INTERFACE OPTION 24x47 SUPPLY FAN ACCESS DOOR 33X34 20 FAXA SVX01B EN Installation Exterior features unit sizes 031 amp 040 with TE wheel EXHAUST CONDENSER FANS DAMPER LIFTING HOLES CONTROL PANEL ACCESS DOOR 26 X 39 FILTER Am X 425 HORIZONTAL DISCHARGE OPTION MAIN COMPRESSOR ACCESS PANEL MAIN CONDENSER 40 X 35 COIL ACCESS PANEL 68 X 36 HUMAN INTERFACE ACCESS DOOR UNIT CONTROL PANEL CONVENIENCE OUTLET OPTION MAIN POWER WIRING ENTRANCE CAN ALSO BE RUN THRU BASE REHEAT COMPRESSOR COIL ACCESS PANEL 34 X 36 24 VOLT CONTROL CIRCUIT WIRING ENTRANCE CAN ALSO BE RUN THRU BASE
18. abnormal end play and excessive vibration or noise Fan motor bearings are permanently lubricated and do not require lubrication Clean and repaint any corroded surface 74 Maintenance Periodic Maintenance Procedures This section describes specific maintenance procedures that must be preformed as a part of the normal maintenance program for this unit Be certain to disconnect electrical power to the unit before performing these procedures Note the following coil cleaning proce dures apply only to the outdoor condens ers Do not use these procedures for the reheat or evaporator coils Cleaning the Condenser Coils Clean the coil at least once each year or more frequently if located in a dirty environment to help maintain proper unit operating efficiency High discharge pressures are a good indication that the coil needs cleaning Follow the detergent manufacturer instructions as closely as possible to avoid potential damage to the coil WARNING Hazardous chemicals Coil cleaning agents can be either acidic or highly alkaline Handle chemical carefully Ensure proper handling by wearing goggles or face shield chemical resistant gloves boots and apron or suit as required For personal safety refer to the cleaning agent manufacturer s materials safety data sheet and follow allrecommended safe handling practices Failure to follow all safety instructions can cause death or serious injury To c
19. be in accordance with NEC and local codes 2 Reference Table I IP 3 on page 46 for recommended wiring distance and size 3 Communication link wiring must be 18 AWG shielded twisted pair Belden 8760 or equivalent 4 Communication link must not exceed 5 000 feet maximum for each link See Table I IP 2 on page 35 5 Do not run communication link between buildings WARNING Hazardous voltage Before servicing unit disconnect electrical power source and remote disconnects Failure to do so may cause death or injury WARNING Disconnect gas supply Before servicing unit FIRST turn off the gas supply Failure to turn off the gas supply can cause death or serious injury FAXA SVX01B EN Installation e TRANE Low Voltage AC Field Wiring Connections To access the wire entry locations open the RHI panel door and remove the two screws on the right hand side of the key pad Swing the keypad open exposing both the wire entries and the back of the HI module Refer to Figure I IP 7 on page 48 and connect one end of the three conductor 24 volt wires to the remote panel terminal strip and ground Communication Link Shielded Twisted Pair Wiring Trim the outer covering of the shielded cable back approximately one inch See Figure I IP 8 Do not cut the bare shield wire off Strip approximately 2 inch of insulation from each insulated wire to connect them to the terminal strip at the
20. corner angle 23 side rail 10 corner angle 24 side rail 11 crossmember 25 duct support end rail 12 crossmember 26 corner angle 13 crossmember 27 corner angle 14 duct support end rail side rail corner angle side rail duct support end rail Typical standard roof curb assembly for units with the TE wheel FAXA SVX01B EN 13 e TRANE installation Acoustic Considerations Before determining the final unit installation site remember that proper unit placement is critical in reducing transmitting sound levels to the building The ideal time to make provisions to reduce sound transmissions is during the design phase The most economical means of avoiding a potential acoustical problem is to place units in areas that are not acoustically sensitive Ideal locations are over over corridors utility rooms toilets or other areas where higher sounds levels below the unit may be acceptable Follow these basic guidelines to help minimize sound transmission through the building structure Locate the unit s center of gravity close to or over a column or main support beam If the roof structure is very light replace roof joists using a structural shape in the critical areas described above Note Cut applicable holes only for the supply exhaust and return duct pen etration in the roof deck To maintain roof integrity and prevent possible property damage do not remove the roof decking fro
21. maintain occupant comfort and space relative humidity The Capacity Control section discusses this issue in more detail Airside Economizers Often fresh air units are sized to deliver the minimum ventilation air required for the space it serves However the ventilation air is typically only a portion of the space supply air Airside economizing can provide up to 10096 of the space supply air come from outdoors when outdoor air conditions are suitable for free cooling capability rm OA delivered directly to conditioned spaces Jo O Figure 2 Direct discharge to conditioned space OA delivered to plenum sa l D Q Y Y Figure 3 Indirect discharge to fan coil units OA delivered to hallway I Hallway _ l a Figure O GI 4 Direct hall discharge with fan coil or PTAC units FAXA SVX01B EN It s important to remember that airside economizer capability can be lost if dedicated outdoor air systems are sized for minimum ventilation air only To provide economizer capability on a dedicated outdoor air system the terminal units must have the ability to introduce 100 outdoor air during the economizer cooling mode The terminal unit s outdoor air damper should modulate between fully closed and fully open to allow the FAU to deliver the ventilation air design volume to the space The terminal unit should enable economizing only if the outdoor dry bulb and dew point conditions are suff
22. needed mechanical cooling and heating operation are either partially 50 or completely disabled 10096 to save energy The demand limit definition is user definable at the human interface panel Demand limit binary input accepts a field supplied switch or contact closure When the need for demand limiting discontinues the unit s cooling heating functions will again fully enable Evaporator Coil Frost Protection Frostat A temperature sensor on the evaporator determines if the coil is getting close to a freezing condition Mechanical cooling capacity is shed as necessary to prevent icing The Frostat system eliminates the need for hot gas bypass and adds a suction line surface temperature sensor mounted near the TXV bulb location to shut off cooling when coil frosting conditions occur The supply fan does not shut off and will de ice the coil Timers prevent the compressors from rapid cycling Occupied Unoccupied Switching There are four ways to switch occupied unoccupied 1 programmable night setback sensor 2 field supplied contact closure hardwired binary input to RTM 3 Tracer Summit or other BAS via LCI I with LonTalk DAC profile 4 factory mounted time clock Field supplied occupied unoccupied input on the RTM This input accepts a field supplied switch or contacts closure such as a time clock Tracer System The Tracer system can control the occupied unoccupied status of the fr
23. or blinks if system is in test mode COOL glows continuously during cooling cycles or blinks to indicate a cooling system failure HEAT glows continuously during heating cycles or blinks to indicate a heating system failure SERVICE blinks or glows to indicate a problem These signals vary depending on the particular equipment used FAXA SVX01B EN FAXA SVX01B EN e TRANE Operation Integrated Comfort Systems Sensors for FAU Applications Zone temperature sensor w timed Zone temperature sensor w timed override buttons and local setpoint override buttons accessory model adjustment accessory model number number digit 17 A BAYSENS013 digit 18 A BAYSENS014 i bi This zone sensor is for use with cooling This zone sensor is for use with cooling heating Integrated Comfort Systems heating ICS It provides the following ICS It provides the following features features and system control functions and system control functions Remote temperature sensing in the Remote temperature sensing in the zone zone Atimed override button to move an Atimed override button to move an Integrated Comfort TM System or a ICS or building management system building management system from from it unoccupied to occupied mode unoccupied to occupied mode Cancel button to cancel the unoccupied Setpoint thumbwheel for local setpoint override command adjustment Cancel button to cancel the unoccupied override
24. supplying power to the load b Provide a suitable Varistor or RC network across the INDUCTIVE LOADS supply terminals to reduce voltage spikes c Place a diode across the DC OPERATED INDUCTOR terminals to eliminate back EMF d HIGHLY INDUCTIVE LOADS especially fluorescent lights may require a relay in which case step a and c apply The timeclock can be surface or flush mounted Lift off the front cover and loosen the two screws on opposite corners Pull off the base s plug with a left to right rolling motion Time Clock Installation Checklist 1 Ensure operating temperature is within 4to 131 F 2 Locate the time clock at least 5 feet away from any large electrical contact or machinery to avoid possible electrical interference problems 3 Provide a separate independent circuit for the time clock power supply 4 Since all electronic instruments are sensitive to voltage spikes pay close attention to the following a If possible supply power to the electronic time clock from a phase different than the one supplying power to the load b Provide a suitable Varistor or RC network across the INDUCTIVE LOADS supply terminals to reduce voltage spikes c Place a diode across the DC OPERATED INDUCTOR terminals to eliminate back EMF d HIGHLY INDUCTIVE LOADS especially fluorescent lights may require a relay in which case A and C apply The Digi 20A timeclock unit can be surface or flush mounted Lift off t
25. the release of CFC fully halogenated compounds Trane urges all HVAC service personnel to make every effort to prevent any refrigerant emissions while installing operating or servicing equipment Always conserve refrigerants for continued use and follow all warnings and cautions in this manual FAXA SVX01B EN e TRANE Cross reference to related publications Packaged Fresh Air Unit Programming Guide FAXA SVP01B EN Accessory Roof Curb Installation Manual FAXA SVN01B EN Reznor Installation Form RGM 401 Installation Operation Service for units with gas heat Installation isaac u a vue 2 General Information 2 Pre installation Considerations 8 Dimensions Weights 15 Mechanical Requirements 33 Electrical Requirements 36 Installation Procedure _ 40 Pre Startup Requirements 51 RAMU esl teste e saa 2 Operation 22 54 General Information 54 Sequence of Operation 12 Maintenance inbox leere b siete stet ee 67 General Information 67 Maintenance Procedures
26. the injury similar to frostbite Slowly warm the afffected area with lukewarm water and seek immediate medical attention Direct contact with liquid refrigerant may cause minor or moderate injury To completely charge the system charge gaseous refrigerant into the suction line shrader valve with the unit running However make sure that some refrigerant is present in each circuit before starting the compressors The refrigerant container should be upright so that gaseous refrigerant is drawn off the top Note Charge each circuit with R134a See Table 1 on page 70 CAUTION Motor winding damage Do not use a megohm meter or apply voltage greater than 50 DVC to a compressor motor winding while it is under a deep vacuum Voltage sparkover may damage the motor windings Note Refer to Table M GI 1 on page 70 for POE oil type Oil type is different for Trane compressors vs Copeland compressors Failure to comply may cause premature compressor failure and void compressor warranty CAUTION Compressor damage Never manually or automatically pump down system below 7 psig This will cause the compressor to operate in a vacuum and result in compressor damage 79 e TRANE 80 Maintenance Periodic Maintenance Checklists Monthly Checklist The following checklist provides the recommended maintenance schedule to keep the unit running efficiently WARNING Hazardous voltage Disc
27. the sensor on the wall in an area with good air circulation at an average temperature Avoid mounting space temperature sensor is areas subject to the following conditions Drafts or dead spots behind doors or in corners Hot or cold air from ducts Radiant heat from the sun or appliances Concealed pipes and chimneys Unheated or non cooled surfaces behind the sensor such as outside walls Airflows from adjacent zones or other units To mount the sensors remove the dust cover and mount the base on a flat surface or 2 x 4 junction box Sensors ship with mounting screws Mounting the Subbase Remove the zone sensor cover from subbase and mount subbase on the wall orona2x4 junction box Route wires through the wire access hole in the subbase See Figures I IP 3 and I IP 4 on page 44 Seal the hole in the wall behind the subbase Wiring Guidelines WARNING Hazardous voltage Before servicing unit disconnect all electrical power including remote disconnects Follow proper lockout tagout procedures to ensure power cannot be inadvertently energized Failure to do so can cause death or serious injury Note Guidelines for wire sizes and lengths are shown in Table I IP 1 The total resistance of these low voltage wires must not exceed 2 5 ohms per conductor Any resistance greater than 2 5 ohms may cause the control to malfunction due to excessive voltage drop Note Do not run low voltage c
28. the unit electrical wiring connections to locate the fault and make any repairs necessary Table 1 Common unit problems and solutions problem possible cause remedy drain pan is overflowing plugged drain line clean drain line unit not level level unit standing water in drain pan unit not level level unit plugged drain line clean drain line wet interior insulation instructions coil face velocity too high improper trap design drain pan leaks overflowing reduce fan speed design trap per unit installation repair Leaks conden excess dirt in unit missing filters replace filters filter bypass reduce filter bypass 81 e TRANE A about this manual 2 acoustic considerations 14 acronyms 2 adjusting fan belt tension 74 air filters 72 airside economizers 58 annual maintenance 77 annual maintenance checklist 71 C cautions 47 center of gravity and weights 41 cleaning the coil 71 cleaning the drain pan 72 coil cleaning procedure 71 communication link 49 communication wiring 50 condensate drain trapping 35 cooling 58 cooling or heating 59 60 D dehumidification 58 59 duct connections 33 ductwork considerations 33 E electrical requirements 36 50 establishing capacity requirements 61 F FAU without reheat 60 field installed control wiring 50 filtration 58 fresh air unit functions 58 G gas heat requirements 50 gas pipe installation procedure 33 gas pipe sizing 3
29. x UU W Mu Ne Cum R Ce CJ A Jf Com JC v Jf O O Figure HP 6 Human interface HI panel keypad Table HP 2 Maximum communication link Ambient Temperature and Humidity wiring length Limits Ambient operating conditions nh S Temperature 32 120 F 1 000 ft up to 60 pf ft Relative humidity 10 to 9096 non Um upto seth condensing 4 000 ft up to 30 Ambient storage conditions 5 000 ft up to 25 Temperatures 50 to 200 F Note picofarads foot Relative humidity 5 to 9596 non condensing Table I IP 3 Wiring recommendations for the remote HI panel distance from unit recommended to remote HI wire size 0 460 feet 18 gage 461 732 feet 16 gage 733 1000 feet 14 gage FAXA SVX01B EN Mounting the Remote Human Interface RHI Panel The installer must provide all mounting hardware such as hand tools electrical boxes conduit screws etc Refer to Figure I IP 7 on page 48 for the mounting hole and knockout locations Procedure Refer to Figure I IP 7 on page 48 and follow the procedure below for mounting the remote HI panel on a 4 by 4 electrical junction box Place the microprocessor in a clean dry location during the enclosure mounting procedures to prevent damage 1 Mount an electrical junction box in the wall so that th
30. 01B EN Installation e TRANE Condensate Drain Trapping A fresh air unit is selected for its dehumidifying capability As such condensate can be formed at an enormous rate The Packaged Fresh Air Unit drain pan and condensate line have been sized and designed accordingly An often overlooked element of proper condensate drainage is trapping An incorrectly designed and installed trap on the piping exiting the drain pan can restrict the flow of condensate or cause spitting or geysering of the condensate water which can dampen the interior insulation of the air handler and or ductwork creating an opportunity for mold infestation The HVAC equipment manufacturer s installation and trapping instructions must be carefully followed to assure adequate condensate removal under all operating conditions Figure l MR 2 shows the proper design for a p trap design in an air handler with a draw through coil arrangement Drain Pan Water Level During Normal Operation 1 for each 1 of maximum negative static pressure 1 J half of H L H J pipe diameter insulation Figure I MR 2 P trap design for drain pan 35 e TRANE Installation Electrical Requirements Table I ER 1 Electrical service sizing data Follow these guidelines referring to unit unit reheatcomp main 1 maincomp2 C maincomp3 D wiring diagrams and supply power size voltage tons rla Ira
31. 01B EN Operation e TRANE general information Figure O GI 1 The human interface panel on the Trane Packaged Fresh Air unit The optional remote mount version of the human interface RHI panel has all the functions of the unit mounted version except for the service mode To use a RHI the unit must be equipped with the remote HI interface option which includes an interprocessor communica tions bridge IPCB The RHI can be located up to 1 000 feet 304 8 m from the unit A single RHI can be used to monitor and control up to four fresh air units that have each been supplied with a RHI interface option IPCB module The main menus of the human interface panels are STATUS monitors temperature pressure humidity setpoints and input and output status CUSTOM key allows the user to customize a status report consisting of up to four screens of the data available in the main Status menu SETPOINT allows the user to edit all factory preset default setpoints DIAGNOSTICS allows the user to review active and historical lists of diagnostic conditions A total of 49 different diagnostics can be read at the human interface HI panel and the last 20 diagnostics can be held in an active history buffer log at the HI panel SETUP allows the user to edit control parameters sensor selections setpoint source selections output definitions and numerous other points in this menu All points have factory preset v
32. 100 122 KW ONLY HOLE 43 625 9 3 8 1 4 1 8 RETURN OPENING OPTION 6 7 8 10 1 8 SUPPLY OPENING INLET HOOD TE I I EXHAUST OPENING e OPTION 2 3 CONTROL 7 7 8 SEE DETAIL unit with TE wheel 21 6 1 8 1 6 1 2 11 11 3 8 1 4 1 8 6 7 8 6 1 3 8 10 1 8 RETURN OPENING OPTION SUPPLY OPENING EXHAUST OPENING OPTION 11 7 8 18 FAXA SVX01B EN OPTIONAL ELECTRIC HEAT DUAL SOURCE POWER WIRING ERIT Es BOX ENTRANCE W 208 OR 240V 70 84 KW ONLY HOLE 3 00 100 122 KW ONLY HOLE 3 625 e TRANE Installation Fresh air unit control panel detail all unit sizes detail A THRU BASE 24V CONTROL CIRCUIT WIRING ENTRANCE 21 094 OPTIONAL CONVENIENCE OUTLET WIRING ENTRANCE 9 875 THRU BASE MAIN POWER WIRING ENTRANCE HOLE 03 000 NOTE DRILL OR PUNCH HOLE IN COVER PLATE FOR SMALLER CONDUIT CONNECTION 1 1 3 8 10 5 8 7 3 4 la 8 7 8 10 3 8 4 top view FAXA SVX01B EN 19 e TRANE Installation Exterior features for unit sizes 031 amp 040 without TE wheel CONDENSER FANS CONVENIENCE OUTLET OPTION AULEM LIFTING HOLES HORIZONTAL DISCHARGE MAIN COMPRESSOR ACCESS PANEL OPTION 40x35 MAIN CONDENSER HUMAN
33. 3 general unit requirements 50 82 H heating 58 human interface HI panel 46 49 installation checklist 50 interprocessor communication bridge 49 L leveling the unit 41 literature change history 2 low voltage AC field wiring 49 M maintenace general data 70 maintenance periodic checklists 77 maintenance procedures 71 monthly checklist 77 mounting the remote human inter face RHI panel 47 0 operating procedures 78 overview of manual 2 P packaged FAU operation 59 periodic maintenance checklist 71 periodic maintenance procedures 71 pre installation checklist 8 pre startup checklist 51 R receiving and handling 8 receiving checklist 9 refrigerant evacuation 75 refrigerant system 75 refrigeration emissions 2 remote human interface panel 46 remote human interface panel installation 46 rigging and handling 40 rigging procedure 41 roof curb and ductwork 11 roof curb installation 11 roof support 11 S service access 10 11 ship separate accessories 8 shipping package 8 skid removal 8 standard remote sensor BAYSENS017 43 startup log 53 supply air temperature 58 supply fan and drive 73 supply power wiring 36 system checks 78 system configurations 58 T time clock option 45 Tracer Summit 50 U unit handling procedure 40 unit nameplate 7 8 52 unit startup procedures 52 unit startup checklist 52 unit storage 9 V voltage imbalance 78 W warnings and cautions
34. 3 2 277 6 230 60 3 770 101 0 134 7 1684 202 1 240 6 460 60 3 385 505 674 842 1010 1203 066 208 60 3 1166 1554 1943 2332 2776 3386 230 60 3 1010 134 7 1684 202 1 240 6 2935 460 60 3 um 505 674 842 1010 1203 146 7 Note Electric heat FLA is determined at 208 240 amp 480 volts Table I ER 10 Dual source electric heat customer wire gauge AWG unit kW kW kW kW kW kW size voltage 42 56 70 84 100 122 031 208 60 3 1 0 2 0 230 60 3 1 1 0 040 208 60 3 1 0 20 30 250 230 60 3 1 10 2 0 40 051 208 60 3 30 20 300 230 60 3 20 40 250 066 208 60 3 30 250 300 500 230 60 3 20 40 250 350 Table I ER 11 Voltage utilization range utilization voltage range 208 60 3 187 220 230 60 3 208 254 460 60 3 416 508 FAXA SVX01B EN 39 e TRANE Installation Rigging and Placement Before Rigging and Lifting the Unit 1 Verify the roof curb is installed properly and has the prooper gaskets installed and is level and square to ensure adequate curb to unit seal 2 Attach adequate strength lifting cables to the lifting lugs See Tables I DW 1 amp l DW 2 on page 32 for unit amp component weights See Figure I PC 4 on page 32 for the proper unit lifting procedure To lift the unit use spreader bars to protect the unit and ensure uniform lift Note that the minimum distance between th
35. 42 1142 8081 1051 1212 1374 1616 1455 1455 8663 1126 1300 1473 1819 1559 1386 FAXA SVX01B EN Rigging Procedure 1 Use spreader bars as shown in Figures HP 2 and I IP 3 to prevent upper cabinet damage If possible use chains or cables at lifting locations Do not use lifting hooks or chain hooks Ensure dimension A is not shorter than recommended to prevent lifting instability 2 Cables used to lift the unit must be capable of supporting the entire unit weight 3 Unit center of gravity balance is located approximately at the position of the center of balance labels along the length of the unit Also you may reference the center of gravity locations in Figure IHP 1 on page 40 Leveling the Unit The unit must be installed level to ensure proper unit operation The unit must be level in both horizontal axis max slope 14 per foot WARNING Improper unit lift Failure to properly lift unit can cause death serious injury or equipment property only damage FAXA SVX01B EN e TRANE Installation LIFTING POINT A MUST BE ALIGNED DIRECTLY OVER UNIT CENER OF BALANCE FOR A LEVEL LIFT 7 FT MINIMUM SHORTER LENGTHS MAY CAUSE LIFTING INSTABILITY USE SPREADER BARS USE CHAINS OR CABLES DO NOT USE HOOKS IN LIFTING HOLES LOCATION OF CENTER OF BALANCE LABELS INDICATE APPROX CENTER OF BALANCE LOCATION ALONG THE LENGTH OF THE UNIT EACH OF THE CABLES USED TO LIFT THE UNIT MUST BE
36. 8 1 0 1 2 2 5 ua 5 3 4 3 1 4 1 4 3 4 3 5 8 2 2 4 1 2 1 1 2 7 7 1 4 11 3 7 8 15 5 1 28 FAXA SVX01B EN e TRANE Installation Extended height roof curb unit sizes 031 amp 040 with TE wheel EXHAUST OPENING OPTION RETURN OPENING OPTIO N THRU BASE ELECTRIC HEAT OPTION SUPPLY OPENING CONTINUOUS WOOD NAILER THRU BASE ELECTRICAL ENTRANCE 9 3 4 qu 12 7 3 4 11 1 8 1 1 5 8 2 9 3 8 25 3 1 4 5 1 2 5 3 4 4 7 8 2 10 5 8 1 8 7 1 3 4 2 2 3 4 2 3 10 3 4 5 3 4 LL Ta 3 4 tot 2 5 4 3 1 4 5 1 1 2 5 7 3 8 42 3 5 8 7 10 1 2 9 2 5 8 12 11 1 4 20 9 6 WOOD NAILER FAXA SVX01B EN 29 e TRANE Installation Extended height roof curb unit sizes 051 amp 066 without TE wheel EXHAUST OPENING OPTION RETURN OPENING OPTION THRU BASE ELECTRIC HEAT OPTION SUPPLY OPENING 3 7 1 8 7 1 7 8 1 10 3 4 10 3 4 3 1 4 4 4 3 2 5 8 2 4 1 2 5 1 1 2 7 7 1 4 11 3 7 8 15 5 i CN um f 7 30 FAXA SVX01B EN e TRANE Installation Extended height roof cu
37. 95 29 333 361 402 434 494 50 50 666 722 60 100 270 32 FAXA SVX01B EN Duct Connections Horizontal Discharge Units Only Model FAHA When attaching ductwork to a horizontal discharge unit provide a watertight flexible connector at the unit to prevent noise transmission from the unit into the ductwork Refer to the Dimensions and Weights section on pages 13 23 for the supply air and return air opening dimensions All outdoor ductwork between the unit and the structure should be weather proofed after installation is complete WARNING Hazardous voltage Disconnect electrical power source and remote disconnects before servicing unit Failure to do so may cause death or injury WARNING Disconnect gas supply Before servicing unit FIRST turn off the gas supply Failure to turn off the gas supply can cause death or serious injury Ductwork Considerations Install all air ducts according to the National Fire Protection Association standards for the Installation of Air Conditioning and Ventilation Systems other than Residence Type NFPA 90A and Residence Type Warm Air Heating and Air Conditioning Systems NFPA 90B Make duct connections to the curb with a flexible material such as heavy canvas If a fire hazard exists Trane recommends using Flexweave 1000 type FW30 or equivalent canvas Use three inches for the return duct and three inches for the discharge duct Keep the material loose to absorb
38. A2 provided the reselected device size does not exceed 800 amps Disconnect Switch Sizing DSS if field provided and installed If the unit is ordered with a factory installed non fused disconnect switch this sizing equation is not necessary If the disconnect is to be field provided and installed use the following equation to determine its rating DSS2 1 15 x load 3 Select the DSS2 value that is the largest ofthe three sets of DSS2 calculations Select a disconnect switch size equal to or greater than the DSS2 value calculated Load Definitions Load 1 supply fan exhaust fan reheat comp A condenser fan 1 A main comp 1 B condenser fan 2 B main comp 2 C condenser fan 3 C main comp 3 D 5100 6600 total energy wheel Load 3 electric heat kW 50 kW 50 Load 4 control power transformer loads 1 amp 1T1 208 230 gas heat factory wired convenience outlet the compressors and condenser fans For FAXA SVX01B EN e TRANE Installation Table I ER 9 Electric heat FLA unit kW kW kW kW kW kW kW kW kW size voltage 20 26 32 42 56 70 84 100 122 031 208 60 3 555 722 888 1166 1554 230 60 3 481 625 770 1010 1347 460 60 3 241 313 385 505 674 040 208 60 3 722 888 1166 1554 1943 2332 230 60 3 625 770 1010 1347 1684 202 1 460 60 3 313 385 505 674 84 2 101 0 051 208 60 3 888 1166 155 4 1943 23
39. CAN ALSO BE RUN THRU BASE CAN ALSO BE RUN THRU BASE EACH HEATER HAS SEPARATE PANEL 16x23 GAS CONNECTION DUAL GAS HEAT EACH HEATER HAS SEPARATE GAS CONNECTIONS ELECTRIC HEAT POWER WIRING ENTRANCE FOR 208 230 V 70 84 100 122 KW CAN ALSO BE RUN THRU BASE CONDENSATE DRAIN CONNECTION FILTER AND DAMPER ACCESS DOOR ELECTRIC HEATER ELECTRICAL PANEL 24x49 25x59 OR SINGLE GAS HEAT ACCESS PANEL 16x23 OR FIXED PANEL FOR NO HEAT OPTION OR HYDRONIC HEAT INTERFACE OPTION 24x67 SUPPLY FAN ACCESS DOOR 33 54 amp CONDENSATE DRAIN ACCESS DOOR 18x54 GAS CONNECTION SINGLE GAS HEATER 22 FAXA SVX01B EN Installation Exterior features for unit sizes 051 amp 066 with TE wheel EXHAUST DAMPER LIFTING HOLES CONTROL PANEL ACCESS DOOR 26 X 57 REHEAT COMPRESSOR COIL ACCESS PANEL 40 X 52 HORIZONTAL DISCHARGE OPTION HUMAN INTERFACE ACCESS DOOR FILTER ACCESS DOOR 29 X 57 MAIN COMPRESSOR COIL ACCESS PANEL 34 X 52 MAIN COMPRESSOR CONVENIENCE OUTLET COIL ACCESS PANELS OPTION UNIT CONTROL PANEL 68 X 62 24 VOLT CONTROL CIRCUIT WIRING ENTRANCE MAIN POWER WIRING ENTRANCE CAN ALSO BE RUN THRU BASE CAN ALSO BE RUN THRU BASE CONDENSER FANS EXHAUST FAN ACCESS DOOR 30 X 57 gt DUAL GAS HEAT ACCESS PANEL EACH HEATER HAS SEPARATE PANEL 16 x 23 GAS CONNECTION DUAL GAS H
40. CONDENSER FANS EXHAUST FAN ACCESS DOOR 35 X 39 DUAL GAS HEAT ACCESS PANEL EACH HEATER HAS SEPARATE PANEL 16 x 23 GAS CONNECTION DUAL GAS HEAT EACH HEATER HAS SEPARATE GAS CONNECTIONS NATURAL GAS 250 400MBH 9 500 NPT INTERNAL ELECTRIC HEAT POWER WIRING ENTRANCE ALSO CAN BE RUN THRU BASE CONDENSATE DRAIN CONNECTION ELECTRIC HEATER ELECTRICAL PANEL INLET HOOD 24 X 30 OR FILTER ACCESS DOOR GAS HEAT PANEL 16 X 42 16 X 23 OR FIXED PANEL FOR NO HEAT OPTION OR HYDRONIC HEAT INTERFACE OPTION 24 X 47 TOTAL ENERGY WHEEL ACCESS DOOR 35 X 39 GAS CONNECTION SINGLE GAS HEATER FILTER AND DAMPER ACCESS DOOR 25 X 39 EVAP COIL AND CONDENSATE DRAIN PAN ACCESS DOOR 18 X 34 SUPPLY FAN ACCESS DOOR 33 34 FAXA SVX01B EN 21 e TRANE Installation Exterior features for unit sizes 051 amp 066 without TE wheel CONDENSER FANS A DA MLL LIFTING HOLES iii ANA po J AT REHEAT COMPRESSOR COIL ACCESS PANEL 40x52 HORIZONTAL DISCHARGE OPTION HUMAN INTERFACE ACCESS DOOR UNIT CONTROL PANEL AIR MAIN COMPRESSOR COIL ACCESS PANEL 68x52 MAIN COMPRESSOR COIL ACCESS PANEL 34x52 CONVENIENCE OUTLET OPTION MAIN POWER WIRING ENTRANCE 4 VOLT CONTROL CIRCUIT WIRING ENTRANCE
41. EAT EACH HEATER HAS SEPARATE GAS CONNECTIONS ELECTRIC HEAT POWER WIRING ENTRANCE FOR 208 230V 70 84 100 122KW CAN ALSO BE RUN THRU BASE ELECTRIC HEATER ELECTRICAL PANEL 24 X 49 SINGLE GAS HEAT ACCESS PANEL 16 X 23 FIXED PANEL FOR NO HEAT OPTION OR HYDRONIC HEAT INTERFACE OPTION 24 X 67 CONDENSATE DRAIN CONNECTION INLET HOOD SUPPLY FAN ACCESS DOOR FILTER ACCESS DOOR 33 X 54 16 X 57 TOTAL ENERGY WHEEL ACCESS DOOR 35 X 57 FILTER AND DAMPER ACCESS DOOR 25 X 59 GAS CONNECTION SINGLE GAS HEATER EVAP COIL AND CONDENSATE DRAIN PAN ACCESS DOOR 18 X 54 FAXA SVX01B EN 23 e TRANE Installation Standard curb unit sizes 031 amp 040 without TE wheel EXHAUST OPENING OPTION RETURN OPENING OPTIO N THRU BASE ELECTRIC HEAT OPTION SUPPLY OPENING CONTINUOUS WOOD NAILER THRU BASE ELECTRICAL ENTRANCE 12 7 3 4 la 11 1 8 5 1 2 6 WOOD NAILER 24 FAXA SVX01B EN e TRANE Installation Standard roof curb unit sizes 031 amp 040 with TE wheel EXHAUST OPENING OPTION RETURN OPENING OPTION THRU BASE ELECTRIC HEAT OPTION SUPPLY OPENING CONTINUOUS WOOD NAILER THRU BASE ELECTRICAL ENTRANCE 9 3 4 12 7 5 4 11 1 8 5 1 2 prt M _
42. ION Use copper conductors only Unit terminals are not designed to accept other type conductors Failure to use copper conductors may cause equipment damage Common HVAC Acronyms For convenience a number of acronyms and abbreviations are used throughout this manual These acronyms are alphabetically listed and defined below BAS building automation systems cfm cubic feet per minute CKT circuit CV constant volume CW clockwise CCW counterclockwise E A exhaust air ECEM exhaust comparative enthalpy module F A fresh air FAU fresh air unit GBAS generic building automation system HI human interface inputs outputs IOM installation operation maintenance manual IPC interprocessor communications LCI LonTalk communication interface LH left hand MCM multiple compressor module MWU morning warmup NSB night setback O A outside air psig pounds per square inch gage pressure R A return air RH right hand RPM revolutions per minute RTM rooftop module S A supply air SCM single circuit module SZ single zone unit airflow TCI Tracer communications module UCM unit control modules VAV variable air volume VCM ventilation control module VOM ventilation override module ZSM zone sensor module Special Note on Refrigeration Emissions World environmental scientists have concluded that ozone in our upper atmosphere is being reduced due to
43. OLT CONTROL CIRCUIT WIRING ENTRANCE 3X 1 095 KO 9 1 2 8 3 8 lifting hole detail A 4 7 1 4 2 3 8 3 5 8 d 7 5 8 m inlet hood end view D INLET HOOD WIDTH 5 7 8 1 1 1 4 ipse UNIT HEIGHT LESS ROOF CURB control panel end view unit size A B D E F G H without TE wheel 031 041 18 10 2 7 4 2 3 0 3 2 9 T 1112 7 114 0 614 39212 051 066 19 3 3 5 10 4 1 3 6 1 3 10 14 2 4 1 2 114 3 63 4 3 with TE wheel 031 041 24 2 2 7 4 2 3 10 914 3 2 10 9 1 11 1 2 1 6 1 614 g212 7 1 3 4 051 066 24 7 3 5 10 4 1 8 3 6 T 3 10 14 2 4 1 2 T8 3 634 3 7 11 FAXA SVX01B EN 15 e TRANE Installation unit without TE wheel indoor side view electric heat version shown DRAIN CONNECTION 3 11 1 8 1 66 O D PVC 11 6 1 2 ELECTRIC HEAT POWER ENTRANCE HOLE 3 625 NOTE DRILL OR PUNCH HOLE IN COVER PLATE FOR SMALLER CONDUIT CONNECTION unit with TE wheel indoor side view electric heat version shown DRAIN CONNECTION 9 3 1 8 66 O D PVC ELECTRIC HEAT POWER ENTRANCE HOLE 95 625 NOTE DRILL HOLE IN COVER PLATE FOR SMALLER CONDUIT CONNECTION 16 10 1 2 single amp dual gas heater options DUAL GAS HEATER OPTION GAS CONNECTION DUAL GAS HEAT EACH HEATER HAS SEPARATE GAS CONNECTION NATURAL GAS 250 500MBH
44. Phase imbalance must be less than 2 096 between phases 2 Check all wiring and connections to be sure that they are intact secure and properly routed The as wired system diagrams are provided in the unit control panel 3 Check that all fuses are installed and properly sized 4 Inspect air filters and coils to ensure airflow to the unit is not restricted 5 Check the zone thermostat settings if applicable 6 Ensure the fan is rotating in the proper direction If phasing is wrong at the main power terminal block the fan and compressors will not run 7 Inspect ductwork and duct connections for tightness 8 Verify all applicable settings on the human interface HI waRNING Live electrical components During installation testing servicing andtroubleshooting this equipment it may be necessary to work with live electrical components Have a qualified licensed electrician or other properly trained individual perform these tasks Failure to follow all electrical safety precautions when exposed to live electrical components can cause death or serious injury FAXA SVX01B EN Maintenance e TRANE Operating Procedures Install pressure gauges on the discharge and suction line access valves When the unit has stabilized after operating approximately 15 minutes at full load record suction and discharge pressures System malfunctions such as low airflow line restrictions incorrect refrigerant ch
45. RGY WHEEL CASSETTE unit size 040 TOTAL ENERGY WHEEL CASSETTE unit size 051 TOTAL ENERGY WHEEL CASSETTE unit size 066 TOTAL ENERGY WHEEL CASSETTE 72 FAXA SVX01B EN Table M GI 1 Maintenace general data Maintenance e TRANE Unit size 031 040 051 066 nominal cfm 3100 4000 5100 6600 maximum design cfm 3100 4000 5100 6600 minimum design cfm 1800 2200 2900 3600 Compressor data reheat circuit nom tons R134a 3 0T 45T 6 2T 6 2T main circuit nom tons R134a 6 2T 9 3T 6 7T 10 0T 6 2T 6 2T 9 3T 10 0T 10 0T 10 0T unit cooling capacity steps 100 66 50 16 100 69 53 21 100 67 45 22 100 72 45 17 Supply fan data FC fan 1 FC fan 2 quantity 1 1 1 1 1 1 1 1 size diameter width in 12 9 15 11 12 9 15 11 15 11 18 13 15 11 18 13 maximum hp 7 5 15 7 5 15 15 13 76 15 13 76 maximum rpm 2115 1760 2115 1760 1760 1515 1760 1515 Condenser fan data quantity fan diameter in type 1 24 2 26 prop 3 26 prop 3 26 prop 3 26 prop cfm reheat main 2900 8500 4000 10500 5500 12000 5500 13000 number of motors hp each 3 1 0 3 1 0 3 1 0 3 1 0 Evaporator coil main size ft 6 67 8 33 11 11 14 06 rows fin s series 4 168 4 168 4 168 4 168 tube diameter in surface 0 5 enhanced 0 5 enhanced 0 5 enhanced 0 5 enhanced Evaporator coil reheat size ft 6 67 8 33 11 11 14 06 rows fin series 2 168 2 168 2 168 2 168 tube diameter in surface 0 5 enhan
46. al strip at the unit Wrap tape around any exposed foil shield and or base shield wire Note The communication link is polarity sensitive Refer to the unit wiring diagram and connect the white lead to the positive terminal and the black lead to the negative terminal These terminals are numbered Reference to color is for clarification to maintain polarity Note To maintain polarity do not connect the base shield wire to ground at the fresh air unit Unit End Cut ground Shield Wire Outer Off at Unit End i Ingulation Ta ee TILH Foil Shield Cover any exposed Foil and Shield Wire with electrical Connect the Shield Ground Wire tape to the ground screw provided in the Remote Digplay panel Connect the two insulated leads to the appropriate terminals in the unit control panel Figure 8 Dressing shielded twisted wire 49 e TRANE 50 Installation Connecting to Tracer Summit Packaged fresh air units can operate with Trane building automation software Tracer Summit version 14 0 or later Note Tape the non insulated end of the shield on shielded wire at the unit Any connection between the shield and ground will cause a malfunction lf daisy chained in the unit splice and tape the shields to prevent contact with ground Communication Wiring Note Communication link wiring is a shielded twisted pair of wire and must comply with ap
47. alues to keep unnecessary editing to a minimum CONFIGURATION allows changing of factory preset unit configuration information This information can be edited only if certain options are field installed or deleted from the unit For example if a communication interface module or ventilation override module VOM were field installed the unit configuration will require editing to reflect those options for proper unit operation SERVICE allows servicing or troubleshooting the unit by selecting component control outputs such as compressors fans damper position etc This menu is accessible only at the unit mounted human interface panel 57 e TRANE Standard With All Units BAYSENSO017 zone temperature sensor accessory model number digit 16 A This wall mounted zone sensor ships with every Packaged Fresh Air unit Additional sensors are also available for order using the accessory model number This zone sensor includes an internal thermistor and should be mounted in the zone This sensor is available for use with all zone sensor options to provide remote sensing capabilities Standard with All Units if Supply Air Dehumidification w Zone Reference or Zone Dehumidification Zone relative humidity sensor This wall mounted zone sensor ships with every Packaged Fresh Air unit that has supply air dehumidification w zone reference or zone dehumidification Additional sensors are also available for order using t
48. are on both sides of the unit To replace filters remove the dirty elements and install new filters ASHRAE 3096 or higher with the filter directional arrows pointing toward the fan Verify that no air bypasses the filters OA EA Figure M MP 1 Filter placement three racks with return FAXA SVX01B EN Inspecting and Cleaning the Drain Pan Check the condensate drain pan and drain line to ensure that the condensate drains properly at least every six months or as dictated by operating experience If evidence of standing water or conden sate overflow exists take steps to identify and remedy the cause immediately Refer to the trouble shooting section of this manual for possible causes and solutions If microbial growth is evident in the drain pan remove and clean it immediately Clean drain pans using the following procedure 1 Disconnect all electrical power to the unit 2 Don the appropriate personal protective equipment PPE 3 Remove all standing water 4 Use a plastic scraper or other tools to remove any solid matter Remove solid matter with a vacuum device that utilizes high efficiency particulate arrestance HEPA filters with a minimum efficiency of 99 9796 at 0 3 micron particle size 5 Thoroughly clean the contaminated area s with an EPA approved sanitizer specifically designed for HVAC use Carefully follow the sanitizer manufacturer s instructions regarding product use 6 Immediately rinse
49. arge malfunctioning of expansion valves damaged compressors and so on will result in pressure variations which are outside the normal range Note If phasing at the main incoming power terminal is incorrect switch two of the three incoming power leads lf a compressor has been replaced and the phase is changed at the compressor it will run backwards and discharge pressure will be very low To resolve incorrect compressor wire phasing change phasing at the compressor It is important that pressures be mea sured under stable and constant condi tions in order for the readings to be useful Voltage Imbalance Voltage imbalance on three phase systems can cause motor overheating and premature failure Maximum allowable imbalance is 2 096 and the readings used to determine it must be measured at the compressor terminals Voltage imbalance is defined as 100 times the sum of the division of the three voltages from the average voltage If for example the three measured voltages are 221 230 227 the average would be 221 230 227 226 volts 3 The percentage of voltage imbalance is then 100 226 221 2 2 226 In this example 2 2 imbalance of more than 2 0 exists be sure to check the voltage at the unit disconnect and terminal block switch If an imbalance at the unit disconnect switch does not exceed 2 0 the imbalance is caused by faulty wiring within the unit Be sure to conduct a thorough inspection of
50. ase the tension of some drives to reduce flopping or excessive startup squealing Figure M MP 5 Fresh air unit fan plate Figure M MP 6 Fan belt adjustment 77 e TRANE Refrigerant System Follow these Trane recommended procedures to ensure refrigerant conservation and emission reduction WARNING Explosion hazard and deadly gases Never solder braze or weld refrigerant lines or any unit components that are above atmospheric pressure or where refrigerant may be present Always remove refrigerant by following the guidelines established by the EPA Federal Clean Air Act or other state orlocal codes as appropriate After removing refrigerant use dry nitrogen to bring the system back to atmospheric pressure before opening for repairs Refrigerant mixtures and air under pressure may become combustible in the presence of an ignition source leading to an explosion Excessive heat from soldering brazing or welding with refrigerant vapors present can form highly toxic gases and extremely corrosive acids Failure to follow all proper safe refrigerant handling practices can cause death or serious injury Important Environmental Concerns Scientific research has shown that certain man made chemicals can affect the earth s naturally occurring stratospheric ozone layer when released to the atmosphere In particular several of the identified chmeicals that may affect the ozone layer are refrigerants that contai
51. ated media unit amp total energy wheel F 2 cleanable unit amp total energy wheel Digit 13 Control interface kits 0 none A LonTalk communications interface LCI comm5 B LCI comm5 amp generic building automation system GBAS 0 5 VDC C LCI comm5 amp GBAS 0 5 VDC amp ventilation override module VOM D LCI comm5 amp VOM E GBAS 0 5 VDC F GBAS 0 5 VDC amp VOM G VOM Digit 14 Time clock 0 none A time clock Digit 15 Remote mounted human interface none remote mounted human interface remote mounted human interface with interprocessor communication bridge module board kit C interprocessor communication bridge module board kit 0 A B Digit 16 Zone sensor 0 none A zone temperature sensor BAYSENS017 Digit 17 Zone sensor with timed override 0 none A zone temperature densor with timed override BAYSENS013 Digit 18 Zone sensor with timed override and local setpoint adjustment 0 none A zone temperature sensor with timed override buttons and local setpoint adjustment BAYSENS014 Digit 19 Remote minimum position potentiometer control 0 none A remote minimum position potentiomenter control BAYSTAT023 Digit 20 Dual setpoint sensor 0 none A dual setpoint sensor Digit 21 Dual setpoint sensor with system function lights 0 none A dual setpoint sensor with system function lights Digits 22 Spac
52. ave humidity exceeds the zone relative humidity setpoint RH In the drying mode capacity is controlled to meet the default supply air drying setpoint dew point The SA drying setpoint can be reset down based on zone relative humidity conditions or OA dew point conditions Drying functions will have priority over cooling mode Upon entering drying mode the first compressor stages up While in drying mode the first compressor stage always remains active This allows condenser reheat when ordered to be available as required during drying operation Additional compressors will sequence to match unit capacity to the latent load Reheat is controlled to meet a supply air reheat setpoint that is a minimum of 3 F greater than the supply air drying setpoint The supply air reheat setpoint can be reset up based on OA or zone temperature conditions When available condenser reheat will cycle to achieve a time weighted average of the reheat setpoint If primary heat reheat is user enabled additional reheat capacity is made available to match sensible load Drying mode stops when the zone relative humidity falls below the opera tor adjustable setpoint for leaving drying mode Cooling Sequence When not in drying mode the unit stages cooling capacity to maintain the supply air cooling setpoint The supply air cooling setpoint can be reset down based on HI selectable parameters OA sensor zone sensor if installed Heating Sequ
53. ced 0 5 enhanced 0 5 enhanced 0 5 enhanced Condenser coil main size ft 15 62 17 71 23 43 28 13 rows fin series 2 168 2 168 2 168 2 168 tube diameter in surface 0 5 enhanced 0 5 enhanced 0 5 enhanced 0 5 enhanced Condenser coil reheat outdoor size ft 5 35 7 29 9 38 9 38 rows fin series 2 168 2 168 2 168 2 168 tube diameter in surface 0 5 enhanced 0 5 enhanced 0 5 enhanced 0 5 enhanced Condenser coil reheat indoor size ft 6 67 8 33 11 11 14 06 rows fin series 2 168 2 168 2 168 2 168 tube diameter in surface 0 5 enhanced 0 5 enhanced 0 5 enhanced 0 5 enhanced Heating data gas heat input MBh 125 350 125 400 125 600 150 800 elec heat input kW 20 56 26 84 32 100 42 122 Refrigerant operating charge Ibs R 134a main circuit circuit 2 25 28 34 48 reheat circuit circuit 1 29 32 50 52 cooling only circuit 1 9 13 18 20 Compressor oil data main circuit POE oil type OIL00078 00078 00078 00078 reheat circuit POE oil type Mobil Artic EAL22CC Mobil Artic EAL22CC OIL00078 OIL0007 main circuit pints 7 11 5 7 11 5 7 7 11 5 11 5 11 5 11 5 reheat circuit pints 4 13 3 75 7 7 Filters number size in 4 16 20 2 4 16x20x2 4 24x24x2 4 24x24x2 face area ft 84 84 15 2 15 2 Total energy TE wheel wheel diameter in 42 48 54 60 wheel drive motor hp 2 1 2 3 4 3 4 exhaust fan quantity 1 1 1 1 size dia width in 12 9 12 9 15 11 15 11 maximum hp 75 75 15 15 maximum rpm 2115 2115 1760 1760 outdoor air filters number
54. command 59 e TRANE Overview Fresh Air Unit Functions The Packaged Fresh Air Unit FAU provides conditioned outdoor air suitable for mechanical ventilation or make up air The FAU conditions outdoor air as necessary to meet system performance requirements by filtration cooling dehumidification and or heating The FAU may deliver ventilation air in a number of ways See the System Configurations section and Figures O GI 2 through O GI 4 for more information Filtration Filtration is necessary for the FAU to maintain system operating efficiency meet occupant comfort and health needs and provide adequate building filtration to aid indoor air quality The Packaged FAU offers a variety of filter options to meet most application needs Cooling When the outdoor air dry bulb temperature is warmer than space conditions the unit cools the outdoor air to the an appropriate supply air dry bulb temperature The Packaged FAU provides cooling using an air cooled direct expansion DX refrigeration system with scroll compressors Dehumidification Drying The Packaged FAU dehumidifies the outdoor air when it is more humid than the required space target conditions This helps prevent high relative humidity levels in the space Occasionally the outdoor air may need to be sub cooled to remove excess moisture When necessary the FAU reheats discharge air to meet space comfort conditions The Packaged FAU recovers energy from
55. dew point setpoint cooling and heating only ELE IE EIL gt _ E Circuit 2 Compressors Condenser 2 ye arose NZ NON NNN Subcooler Condenser 1 Circuit 1 Compressor Supply Fan Evaporator 2 Figure O GI 10 Refrigeration system diagram without reheat Chart O GI 9 Psychrometric chart with FAXA SVX01B EN FAXA SVX01B EN Operation e TRANE Establishing Capacity Requirements Determining the FAU capacity requirements requires careful thought Air handling equipment is typically selected based on design sensible conditions Since latent loads drive the need for the FAU base the selection on design latent conditions For more detailed information on this subject see the Trane Packaged Fresh Air Unit catalog MUA PRC004 EN Cooling and Dehumidification Selection Criteria Evaporator Design Entering Conditions For many climates the peak outdoor air enthalpy occurs at a time when the outdoor dry bulb temperature is not the highest Refer to the chapter on climatic design information in the ASHRAE Handbook of Fundamentals The cooling and dehumidification design condition data is provided three ways 1 Design dry bulb temperature with mean coincident wet bulb temperature 2 Design wet bulb temperature with mean coincident dry bulb temperature 3 Design dew point temperature with mean coincident dry bulb temperature The design wet bulb condition typicall
56. e enclosure c Slide the bottom of the plate into place aligning the two 2 clearance holes with the screw holes on the right Install the screws but do not tighten at this time Note If the two screws are not installed as called out in the previous step hold against the key pad plate while installing the door in the next step to prevent it from falling out d Slide the extruded hinge pin at the top left of the door into the hole located under the bottom left side of the display e Install and tighten the hinge screw located at the bottom left side of the enclosure Wall Mounting the RHI Panel 1 Prior to mounting the panel the microprocessor module must be removed from the enclosure Complete step 2 in the previous discussion Mounting on a 4 in x 4 in Electrical Box before proceeding 2 With the microprocessor removed refer to Figure I PR 7 on page 48 for the mounting hole locations for wall mounting 3 Place the enclosure against the mounting surface and mark the mounting holes Note The top of the enclosure is marked with 4 With the enclosure in the correct position remove the enclosure and drill the necessary holes in the surface for the appropriate fasteners plastic anchors molly bolts screws etc 5 Remove the necessary knockouts for the wire or conduit entry before mounting the panel 6 Place the enclosure back onto the surface and secure it with the appropriate scr
57. e lifting hook and the top of the unit should be seven feet 3 Test lift the unit at a minimum height above the ground to verify all rigging equipment operates properly and the unit is properly balanced 4 Lift the unit and position it over the roof curb Align the unit base rails with the roof curb 5 Lower the unit onto the curb Make sure the curb gasket remains intact when positioning the unit Center of Gravity and Weights Center of gravity dimensions and corner weights are approximate Approximate unit shipping weight is the sum of the four corner weights Reference unit weights in the Dimensions and Weights section on page 32 See Figure I IP 1 for fresh air unit center of gravity and for corner weights INLET HOOD unit without TE wheel option Figure I IP 1 Fresh air unit center of gravity and weight distribution unit center of gravity size X in Y in units without total energy wheel 031 90 50 040 90 50 051 100 51 066 100 51 units with total energy wheel 031 123 50 040 123 50 051 130 51 066 130 51 40 H D E F M INLET M HOOD mM DER IE Ig 551 ZE roc 8 Ll l Li B A unit with TE wheel option maxoperational typical point loading weight Ibs weight Ibs A B C D E F G H J 4934 905 1692 1562 775 5194 953 1781 1644 816 6190 1392 1931 1703 1164 6722 1512 2097 1849 1264 6394 1023 1023 1088 1151 1088 1023 6718 1075 1075 1075 1142 11
58. e amp draw at evaporator and exhaust fan motor terminals FLA data is on the motor nameplate 7 After the system has stabilized 15 30 minutes check and record operating pressures and temperatures for all circuits 8 Check natural gas pressure and verify no less than 5 w c 0 18 psi or greater than 14 w c 0 5 psi 9 Inspect refrigerant flow in the liquid line sight glass Flow should be smooth and even with no bubbles once the system has stabilized Normal startup can occur provided that Tracer Summit is not controlling the module outputs or the generic BAS is not keeping the unit off A B C D circuit 1 circuit 2 reheat main Figure 1 2 Compressor arrangement for unit sizes 051 amp 066 To ensure that Tracer Summit has no affect on unit operation remove Tracer wiring and make required changes to setpoint and sensor sources See the Packaged Fresh Air Unit Programming Guide FAXA SVP01B EN for more information Unit Startup Reference the Packaged Fresh Air Unit Programming Guide FAXA SVP01B EN for unit operating instructions copy ships with each unit Also for units with gas heat reference the Reznor Installation Form RGM 401 for proper gas heater startup and operation circuit 2 circuit 1 main reheat Figure 1 1 Compressor arrangement for unit sizes 031 amp 044 53 e TRANE Unit Perfor
59. e front edge of the box will be flush with the finished wall surface 2 Prior to mounting the panel the microprocessor module must be carefully removed from the enclosure To remove the module a Lay the remote panel face up on a flat surface and remove the locking screw from the right hand bottom end of the panel b Remove the recessed hinge screw from the left hand bottom end of the panel c Unlatch the door of the enclosure as if to open it and slide the left hand side of the door upward away from the hinge Lay it aside d With the key pad visible remove the two 2 screws located on the right hand side of the key pad FAXA SVX01B EN Installation e TRANE e Carefully slide the key pad plate upward from the bottom releasing the extruded hinge pin from its socket at the top f Set the microprocessor aside until mounting is complete 3 Remove the junction box knockout in the back of the enclosure Note The top of the enclosure is marked n 4 With the enclosure in the correct position align the mounting holes around the knockout in the enclosure with the screw holes in the electrical handy box and secure with the appropriate screws 5 Replace the microprocessor within the enclosure as follows a Verify that the terminal block jumpers are connected properly b Slide the extruded hinge pin at the top left of the key pad plate into the hole located at the top left hand side of th
60. e relative humidity kit 0 none A space relative humidity kit Digit 23 Carbon dioxide sensor 0 none A carbon dioxide sensor Digit 24 Dry bulb duct sensor 0 none A dry bulb duct sensor FAXA SVX01B EN e TRANE general Installation information Unit Nameplate The unit nameplate identifies the unit model number appropriate service literature and wiring diagram numbers It is mounted on the control panel door Reference this information when making inquiries or ordering parts or literature for the fresh air unit nit mounted IntelliPak microprocessor control with easy to read human interface 2 Pleated filter section with adjustable rack to 4 Standard protective bird screen on inlet hood Horizontal or vertical discharge openings Hi rise electric or gas heat 1 Solid double wall panels of foamed in place construc tion Non corrosive IAQ drain pan sloped in two directions raq damper available for airflow measurement Optional return air damper for unoccupied recirculation Optional condenser reheat coil with modulating control Quiet FC fan All ship with items are Figure I GI 1 Packaged fresh air unit components d inside this compartment FAXA SVX01B EN 7 e TRANE installation Pre Installation Considerations Checklist The following checklist is provided to give an overview of the factory recommended pre installati
61. ead of one large control package And since unit features are distributed among multiple printed circuit boards field replacement is easy Depending on unit options IntelliPak units can operate as 1 stand alone 2 interface with Trane s Tracer Summit building management system 3 interface with a generic non Trane building management system via LCI I using LonTalk DAC profile 4 interface with a generic hard wired non Trane building management system via analog input and binary output interface board GBAS 56 Controls Available Input and Output Points Base Unit RTM module on all units Binary inputs emergency stop external auto stop unoccupied occupied dirty filter exhaust fan air proving Binary outputs unoccupied mode indicator alarm exhaust fan enable Analog input OA damper minimum position heating option analog output hydronic heat interface LonTalk communication interface LCI l option Binary input enthalpy enable unoccupied economizer Binary outputs compressor on off status ventilation status heat status Analog outputs supply air pressure supply air temperature suction temperature of each circuit zone temperature supply air temperature reset signal morning warmup sensor temperature entering air temperature Analog inputs cooling and heating setpoints VAV discharge air temperature setpoints supply air press
62. ed to the cassette 51 e TRANE 52 Installation Unit Startup Procedures 1 Check all electrical connections for tightness 2 Be sure all system components are properly set and installed 3 Inspect all ductwork and duct connections 4 Remove compressor and fan assembly tie down bolts 5 Verify the total energy wheel seal doesn t leak See procedure below To start the unit complete the following list in order 1 Apply power to the unit Close the unit disconnect switch es 2 Adjust setpoints at the HI 3 Turn on the gas if unit has gas heaters and verify all lines are purged of air See the Packaged Fresh Air Unit Pro gramming Guide FAXA SVP01B EN for available unit operating setpoints Refer to the job specifications for proper setpoints Total Energy Wheel Sealchecks The total energy wheel has a neoprene bulb seal to provide an effective seal in both the peripheral and side to side sealing directions Also it is easily adjustable to compensate for seal run in shipping misalignment etc The neoprene bulb is attached to a metal reinforced U shaped neoprene grip The metal neoprene grip allows an expandable grip range that can be moved closer or further from the sealing face as needed The peripheral bulb seals against the wheel outer band the inner bulb seals against the wheel face Follow the procedure below 1 With the wheel stopped move seals as close to the sealing surface as p
63. eleased to daytime mode Cycling capacity morning warmup MWU Cycling capacity morning warmup provides gradual heating to overcome building sink as the zone is heated Normal zone temperature control with varying capacity raises the zone temperature to the MWU zone temperature setpoint Cycling capacity MWU will operate until MWU setpoint is reached or for 60 minutes Then the unit switches to occupied mode Cooling will suspend until building load conditions exceed the MWU setpoint of 3 F 1 7 C which is field adjustable Ventilation Override VOM Option The user can customize up to five different override sequences for purposes of ventilation override control If more than one VOM sequence is requested the sequence with the highest priority initiates first Priority schedule is that sequence A unit off is first with sequence E purge sequence last 67 e TRANE UNIT OFF sequence A When complete system shut down is required the following sequence is used supply fan off outside air dampers closed heat all stages off modulating heat output at 0 vdc occupied unoccupied output deenergized VO relay energized exhaust fan field installed off exhaust damper field installed closed PRESSURIZE sequence B This override sequence is for use when a positively pressured space is desired instead of a negatively pressurized space supply
64. emp as tested Gas heat single or dual bank staged or modulating heater starts and runs Oyes Ono comb blower works Oyes Ono heater capacity control works Oyes Ono burner flame good Oyes Ono entering air temp as tested leaving air temp as tested Exhaust air fan motor nameplate hp motor nameplate FLA fan motor amps fan motor nameplate FLA L1 L2 L3 fan wheel rpm if known Total energy wheel motor nameplate hp motor nameplate FLA fan motor amps fan motor nameplate FLA L1 L2 L3 fan wheel rpm if known Supply air fan motor nameplate hp motor nameplate FLA fan motor amps fan motor nameplate FLA L1 L2 L3 fan wheel rpm if known Additional notes FAXA SVX01B EN 55 e TRANE Operation Packaged Fresh Air Units with INTELLI We have designed the Trane Packaged Fresh Air unit with the latest control technology Modular DDC controls with human interface HI panel make Packaged Fresh Air units flexible and easy to operate Controls are Trane designed to work with Trane equipment for optimum efficiency The factory installs and commissions each control component to ensure simple and reliable operation Furthermore the DDC control s modular design allows greater application flexibility using up to twelve different modules dependent upon unit options You can order exactly what the job requires as options inst
65. ence When not in drying mode the unit stages heating capacity to maintain the supply air heating setpoint The supply air heating setpoint can be reset up based on HI selectable parameters OA sensor zone sensor if installed The supply air heating setpoint must be lower than the supply air cooling setpoint FAXA SVX01B EN 2 Unoccupied Sequence When the return air damper option is installed and a request for unoccupied operation is received the fan and cooling heating capacity cycle in a recirculating mode to maintain zone requirements See below for a detailed description of the operating modes If no return air damper is installed the fan stops and the OA damper closes in unoccupied mode Drying Mode During unoccupied mode with return air damper option installed the unit enters the drying mode when the zone RH exceeds the unoccupied zone RH setpoint In the drying mode capacity cycles to maintain the supply air drying dew point setpoint The SA drying setpoint can be reset down based on zone relative humidity conditions and will be based on the unoccupied zone RH setpoint Supply air reheat functions are active to maintain the supply air reheat setpoint Supply air reheat reset functions are active and reset based on unoccupied zone setpoints Exhaust fan operation control will cycle off during unoccupied modes unless unoccupied economizer operations are active Cooling Mode During unoccupied cooling m
66. eplace the detailed instructions in the appropriate sections of this manual Always read the entire section carefully to become familiar with the procedures WARNING Hazardous voltage Before servicing unit disconnect all electrical power including remote disconnects Follow proper lockout tagout procedures to ensure power cannot be inadvertently energized Failure to do so can cause death or serious injury WARNING Disconnect gas supply Before servicing unit FIRST turn off the gas supply Failure to turn off the gas supply can cause death or serious injury Receiving Olnspect unit and components for shipping damage File damage claims immediately with the delivering carrier unit for missing material Look for ship with drives filters and sensors that are packaged separately and placed inside the filter section access panel See the Receiving and Handling section on page 9 OiCheck nameplate unit data so that it matches the sales order requirements Unit Location the unit location is adequate for unit dimensions ductwork piping and electrical connections CJEnsure access and maintenance clearances around the unit are adequate See the Service Access section on page 10 Unit Mounting ORemove shipping brackets on the compressor assembly exhaust and supply fans Component Overview OWVerify all fan and motor sheaves aligned O Chec
67. equirements section on page 36 L Units with gas heat ensure adequate gas service and piping is available at unit installation location O Ensure the unit installation location is level Receiving and Handling Shipping Package Packaged Fresh Air units ship fully assembled Ship Separate Accessories Field installed sensors ship separately inside the unit s filter return air section Units with gas heat have temporary panels in place for shipping The permanent panels are located in this compartment and must be field installed Units with the total energy wheel option have an exhaust louver that ships inside the exhaust compartment Install the louvers after installing the unit in its final position A WARNING No step surface Do not walk on the sheet metal drain pan Walking on the drain pan can cause the supporting metal to collapse causing death or serious injury FAXA SVX01B EN FAXA SVX01B EN Installation e TRANE Receiving Checklist Complete the following checklist immediately after receiving unit shipment to detect possible shipping damage If entry into the unit is necessary bridge between the unit s main supports using multiple 2 x 12 boards O Verify that the unit nameplate data corresponds to the sales order and bill of lading including electrical data O Visually inspect the unit exterior for physical signs of shipping damage or material shortages O If a unit appears damaged
68. erence the Accessory Roof Curb Installation Manual FAXA SVNO1B EN Roof Support The roof must be capable of adequately supporting the weight of the Packaged Fresh Air unit as well as the curb See Figure I IP 1 on page 40 for approximate unit four corner weights Trane Roof Curb Installation If the building is new the curb may be assembled at any convenient location and installed as soon as the roof support members are in place The curb must be mounted on the roof deck and support FAXA SVX01B EN Installation e TRANE provided directly below the flanges of the roof curb for further support and to minimize vibration If the fresh air unit is to be installed on an existing building hoist the curb shipping container to the roof where the curb can be assembled more conveniently Standard Perimeter Curb Rail Assembly Follow the procedure below as an example of how to field assemble a field roof curb This procedure also applies to the Trane standard 14 roof curb Reference pages 12 amp 13 for assembly drawings 1 Attach corner angle 7 using 4 sheet metal screws to the end of end rail 1 adjacent to side rail 3 Place the clearance holes in the corner angle toward the top of the curb 2 Attach end rail 1 to side rail 3 using 4 sheet metal screws 3 Align side rail 4 next to side rail 3 and attach crossmember 11 perpendicular to both side rails at the joint using eight sheet metal screws 4
69. esh air unit Factory Mounted Time Clock A time clock can control the occupied unoccupied status of the fresh air unit Timed Override Activation ICS This function is operational whenever the units RTM module board is used as the zone temperature sensor source which can be set at the human interface panel Initiate this function by pressing the override button on the zone sensor to switch the unit to the occupied mode Unit operation occupied mode during timed override will terminate by a signal from Tracer FAXA SVX01B EN FAXA SVX01B EN Operation e TRANE Timed Override Activation Non ICS This function is active whenever the user selects the unit s RTM module board as the zone temperature source can be set at the human interface panel Initiate this function by pressing the override button on the zone sensor which will switch the unit to the occupied mode Automatic cancellation of the timed override mode occurs after three hours of operation Low Ambient Compressor Lockout This function will lock out the compressor if the outdoor air temperature is below the low ambient compressor lock out temperature setpoint when using a field installed outside air sensor This setpoint is adjustable at the human interface panel Compressors will lock out when outdoor air temperature falls below that selected temperature and will start again when the temperature rises 5 F above the setpoint Comparative Enthalp
70. ews 7 Follow step 5 in the previous section Mounting on a 4 by 4 Electrical Box to replace the microprocessor within the enclosure 47 TRANE Installation 4 78 E 5 60 5 60 0 20 X 0 40 SLOT 6 PLACES 20 25 HOLE d 6 08 10 70 12 01 5 40 10 98 ds e 2 4 31 m 0 65 Y Y i c CUM 3 36 340 SIDE VIEW 9 84 FRONT VIEW E 1 075 amp 875 KNOCKOUTS 2 ON TOP amp 2 ON BOTTOM ort 0 87 MS 24 0 94 END 1 00 mi 8 12 BOTTOM VIEW Figure l IP 7 Remote mounting holes and knockout locations 48 FAXA SVX01B EN Wiring the Remote Human Interface The remote human interface requires 24 4 volts power source and a shielded twisted pair communication link between the remote panel and the interprocessor communication bridge ICPB module at the self contained unit Note To prevent control malfunctions do not run low voltage wiring 30 volts or less in conduit with higher voltage circuits Field wiring for both the low voltage power and the shielded twisted pair must meet the following requirements 1 All wiring must
71. fan on outside air dampers open heat all stages off modulating heat output at 0 vdc occupied unoccupied output energized VO relay energized exhaust fan field installed Off exhaust damper field installed closed EXHAUST sequence C With the building s exhaust fans running and the unit s supply fan off the conditioned space becomes negatively pressurized This is desirable for clearing the area of smoke when necessary i e from an extinguished fire to keep smoke out of areas that were not damaged supply fan off outside air dampers closed heat all stages off modulating heat output at 0 vdc occupied unoccupied output deenergized VO relay energized exhaust fan field installed on exhaust damper field installed open PURGE sequence D This sequence is for purging air out of a building before coming out of unoccupied mode of operation Also it can purge smoke or stale air supply fan on outside air damper open heat all stages off modulating heat output at 0 vdc occupied unoccupied output energized VO relay energized exhaust fan field installed on exhaust damper field installed open 68 Operation PURGE sequence E This sequence uses supply air control for smoke control supply fan on outside air dampers open heat all stages off modulating heat output at 0
72. form the coil d Sprayer pressure must not exceed 600 psi 2 Spray leaving air side of the coil first then spray the entering air side of the coil Allow the detergent and water solution to stand on the coil for five minutes 3 Rinse both sides of the coil with cool clean water 4 Inspect the coil If it still appears dirty repeat the cleaning procedure 5 Reinstall all unit components and panels and restore electrical power and gas supply to the unit FAXA SVX01B EN Total Energy Wheel Protect the total energy wheel by using a 30 filter to keep dust and dirt from the heat transfer surface The wheel is somewhat self cleaning through its normal action of rotating in and out of counter current airflow streams If the wheel becomes dirty clean it by blowing out the unit with compressed air 20 psig maximum Cleaning the Total Energy Wheel Trane total energy wheels are self cleaning with respect to dry particles Smaller particles pass through the wheel Larger particles land on the surface and are blown clear as the wheel turns into the opposite airflow path For this reason the primary cleaning required for the total energy wheel is to remove the oil based aerosol film that collect on the surface Such films can close off micron sized pores at the surface of the desiccant material reducing its ability to absorb and desorb moisture Periodically record the air temperatures entering and leaving the energy wheel
73. fused disconnect switch this sizing equation is not necessary If the disconnect is to be field provided and installed use the following equation to determine its rating DSS 1 15 x load 1 load 2 load 3 load 4 Select the DSS value that is the larger of the cooling set 1 mode DSS or the heating mode DSS value calculated above Select a disconnect switch size equal to or greater than the DSS value calculated Set 3 Units with electric heat single source power concurrent load Concurrent load two compressors and first stage electric heat Primary Heat Reheat Selection You may enable primary heat reheat to take advantage of the primary heat source as supplemental reheat for the condenser reheat Although in most cases the MCA and MOP values are unaffected by the concurrent loads of compressors condenser fans and first stage of electric heat there are a few circumstances where the MCA and MOP are increased when this sequence is employed You must perform three sets of calcula tions to obtain the correct MCA and MOP values one for cooling set 1 only one for electric heat set 2 only and one for when the unit is in the cooling mode with compressors and electric heat on concurrently set 3 For size 031 and 040 units compressors A 1K1 and B 1K2 can run concurrently with 1 of three stage electric heat or 14 of seven stage electric heat For size 051 and 066 size units compres sors A 1K1
74. h the human interface keypad See Figure O GI 1 Also the human interface panel allows you to monitor diagnostic points such as sensor failures supply airflow loss and inoperative refrigerant circuit No special tools are required for servicing the unit Diagnostics are held in memory even during power loss This allows the operator servicer to diagnose the failure root cause All setup parameters are preset from the factory requiring less startup time IntelliPak Unit Features Unit mounted human interface panel with a two line x 40 character display in English Spanish or French language and a 16 function keypad that includes CUSTOM DIAGNOSTICS and SERVICE TEST MODE menu keys Frostat coil frost protection on all units Supply air or zone dehumidification control Supply air or zone temperature control Efficient condenser hot gas reheat with modulating capacity optional Morning warmup operation unoccupied airside economizer optional when unit has return air damper option supply airflow proving supply air tempering control with heating option mappable sensors and setpoint sources occupied unoccupied switching timed override activation Human Interface Panel HI The human interface panel provides a 16 button keypad for monitoring setting editing and controlling The HI panel is mounted in the unit s main control panel accessible through the unit s control panel door FAXA SVX
75. he front cover and loosen the two screws on opposite corners Pull off the base s plug with a left to right rolling motion Surface Mounting Inside Panel Place screws through the base s preset holes and screw to back of panel or wall Wire according to the instructions in the following section Depending upon the specific installation you may find it more convenient to complete wiring before attaching the base Place the terminal cover over the terminal block by aligning the two screws with the corner holes in the base Push the timer firmly onto the plug in the base Tighten the two screws A base for DIN rail mounting is optional Wiring theTimeclock 1 Wire 24 120 or 220 VAC to input terminals Make sure to apply correct voltage Using incorrect voltage will void the warranty 2 Connect wire to the screw terminals according to the unit wiring diagrams Use 12 to 22 AWG wire 45 e TRANE Remote Human Interface Panel Installation Human Interface HI Panel The HI enables the user to communicate necessary unit operating parameters and receive operating status information from within the occupied space The HI displays top level information in the LCD window unless the operator initiates other displays for the various unit functions It also displays menu readouts in a clear language two line 40 character format The 16 key keypad allows the operator to scroll through the various menus to set or modify the o
76. he accessory model number and ordering the space relative humidity kit 58 Operation general information Optional Zone Sensors Dual setpoint manual automatic changeover sensor accessory model number digit 20 A This zone sensor module is for use with cooling heating applications It provides the following features and system control functions System control switch auto off Allows you to automatically select heating or cooling as required or turn the system off Dual temperature setpoint levers allow you to set different cooling blue lever and heating setpoints red lever Thermometer indicates temperature in the zone Carbon dioxide zone sensor accessory model number digit 23 A This zone sensor is for use with Packaged Fresh Air units to monitor levels in the space Dual setpoint manual automatic changeover sensor with system function lights accessory model number digit 21 This zone sensor is for use with cooling heating applications It provides the following features and system control functions System control switch to select AUTO mode for automatic selection of heating or cooling as required or OFF to turn the system off Dual temperature setpoint levers for setting cooling blue lever or heating red lever Thermometer to indicate temperature in the zone Function status indicator lights SYS ON glows continuously during normal operation
77. he guidelines below voltage hp 2hp 3hp 5hp 7 5hp 10hp 15hp 1hp 2hp 3hp Shp 7 5hp 10 15 1 Verify the power supply available is 2080 8 31 59 87 140 222 282 407 31 61 93 149 213 290 407 compatible with the unit nameplate 230 603 28 56 80 132 216 280 406 28 54 82 128 200 258 354 ratings The supply power must be 460 60 3 14 28 40 6 6 10 8 140 203 14 2 7 4 1 6 4 10 0 12 9 17 7 within 10 of the rated voltage listed on the unit nameplate 2 Reference the electrical data in Tables Table FER 3 Exhaust fan motor fla I ER 1 through I ER 8 Protect the standard efficiency high efficiency electrical service from over current and voltage 1hp 2hp 3hp 5hp 7 5hp 10hp 15hp 1hp 2hp 3hp 5hp 7 5hp 10 15 short circuit conditions in accordance 208 603 31 59 87 140 222 282 407 31 61 93 149 213 290 230 603 28 56 80 132 216 280 28 54 82 128 200 258 with NEC requirements Size protection 603 14 28 40 66 108 140 14 27 41 64 100 129 devices according to the electrical date on the unit nameplate 3 If the unit Is not equipped with an Table I ER 4 Energy wheel motor fla Table I ER 5 Condenser fan motors optional factory installed disconnect untsze 066 TS Tis you must install a field supplied hp Ve Ve 3 4 3 4 208 60 3 38 disconnect at or near the unit in voltage 230 60 3 36 accordance with NEC Do not mount a 208 60 3 27 27 36 36 460 60 3 18 field supplied disconnect on the unit 230 60 3 24 24
78. hyxiation or other serious health risks Some gases may be flammable and or explosive Evacuate the area immediately and contact the proper rescue or response authority Failure to take appropriate precautions or to react properly to a potential hazard can cause death or serious injury WARNING Explosion hazard Use only dry nitrogen with a pressure regulator to pressurize units for leak testing Do not use acetylene oxygen compressed air or any mixture of a hydrogen containing refrigerant and air above atmostpheric pressure because they may become flammable and cause an explosion Failure to properly regulate pressure can cause a violet explosion that can cause death serious injury or equipment property only damage In the event of required system repair leak test the liquid line evaporator coil and suction line at pressures dictated by local codes and using the following guidelines FAXA SVX01B EN 1 Charge enough refrigerant and dry nitrogen into the system to raise the pressure to 100 psig 2 Use a halogen leak detector halide torch or soap bubbles to check for leaks Check interconnecting piping joints the evaporator coil connections and all accessory connections 3 If a leak is detected release the test pressure break the connections and reassemble it as a new joint using proper brazing techniques 4 If no leak is detected use nitrogen to increase the test pressure to 150 psig a
79. iciently low to justify economizing Packaged FAU Operation The Packaged FAU can use either DX cooling condenser reheat electric or gas heat to condition the outdoor air The unit controls cooling and heating capacity in stages with the exception of the modulated heat options Cooling and heating staging will result in supply air temperature swings The unit controls will deliver the desired supply air conditions on a time based weighted average FAU with Reheat Figure O GI 7 shows the Packaged Fresh Air system with a DX refrigerant circuit design using reheat Dehumidification Consider Figure O GI 5 If the outdoor air dew point is above the drying setpoint or in the case of zone control the zone RH is above the RH setpoint the FAU will cool the outdoor air to remove required moisture and reheat to meet the discharge temperature setpoint At h1 100 outdoor air enters the FAU The FAU filters cools and dehumidifies the air as it moves through the evaporator Reheat Evaporator Expansion Vaives Operation and reheat coils Air leaves the evaporator coil saturated at the preset dew point condition h2 and is reheated by the reheat condenser to the preset reheat temperature setpoint h3 The reheat evaporator transfers energy to the reheat condenser A liquid solenoid valve effectively modulates the reheat condenser capacity The reheat outdoor condenser rejects surplus heat The reheat eva
80. in the cooling mode use the equations given in set 1 Then repeat the calculations for MCA and MOP for the unit in the heating mode using set 2 When determining loads keep in mind that the compressors and condenser fans do not run while the unit is in the heating mode For units using heaters less than 50 kW use the formula MCA 1 25 x load 1 load 2 load 4 1 25 x load 3 equal to or greater than 50 kW use the formula MCA 1 25 x load 1 load 2 load 4 load 3 Select the nameplate MCA value that is the larger of the cooling set 1 or the heating mode MCA calculated above 2 25 x load 1 load 2 load 3 load 4 Select an overcurrent protective device rating equal to the MOP value If the MOP value does not equal a standard device size as listed in NEC 240 6 select the next lower standard device rating If the next lower standard rating is less than 125 of the current rating of the electric heater load select the next higher standard device rating If the selected MOP is less than the MCA then reselect the lowest standard device size which is equal to or larger than the MCA provided the reselected device size does not exceed 800 amps Select the MOP value that is the larger of the cooling set 1 mode value or the heating MOP value calculated above Disconnect Switch Sizing DSS if field provided and installed If the unit is ordered with a factory installed non
81. ing This includes the unoccupied economizer mode when the wheel disables but the exhaust fan enables The wheel also disables via a factory installed thermostat at any time a frost condition occurs default setpoint 12 F This frost protection thermostat utilizes a setpoint range of 30 to 100 F Total Energy Wheel with Dry Bulb Control The optional total energy wheel recovers energy from the exhaust airstream and preconditions the outdoor air The total energy wheel enables when all of the following are true unit is in occupied mode exhaust fan is enabled outside air temperature is above the upper limit setpoint default setpoint 80 F or below the lower limit setpoint default setpoint 45 F outside air temperature is above the frost protection setpoint default setpoint 12 F Always set the upper limit setpoint to the anticipated return air dry bulb tempera ture Set the lower limit setpoint to 10 F less than the unit supply air dry bulb setpoint The wheel will disable during unoccupied mode or when the exhaust fan is not running This includes the unoccupied economizer mode when the wheel will disable but the exhaust fan will enable The wheel also disables via a factory installed thermostat when a frost condition occurs This frost protection thermostat utilizes a setpoint range of 30 to 100 F 69 e TRANE Maintenance Component arrangement unit size 031 amp 040 70 unit with
82. ing Sequence When not in drying mode the unit will stage cooling capacity to maintain the supply air cooling setpoint The supply air cooling setpoint can be reset down based on HI selectable parameters OA sensor Zone sensor if installed Heating Sequence When not in drying mode the unit will stage heating capacity to maintain the supply air heating setpoint The supply air heating setpoint can be reset up based on HI selectable parameters OA sensor zone sensor if installed The supply air heating setpoint must be lower than the supply air cooling setpoint 2 Unoccupied Sequence When the return air damper option is installed and a request for unoccupied operation is received the fan cooling and heating capacity will be cycled in a recirculating mode to maintain zone requirements See below for a detailed description of the operating modes If no return air damper is installed the fan is stopped and the OA damper is closed in unoccupied mode Drying Mode During unoccupied mode with return air damper option installed the unit will enter the drying mode when the zone RH exceeds the unoccupied zone RH setpoint In the drying mode capacity will be cycled to maintain the supply air drying dew point setpoint The SA drying setpoint can be reset down based on zone relative humidity conditions and will be based on the unoccupied zone RH setpoint Supply air reheat functions will be active to maintain the suppl
83. inspect it immediately before accepting the shipment Remove access panels and check for interiour component damage Make specific notations concerning the damage on the freight bill Do not refuse delivery Report concealed damage to the freight line within the allotted time after delivery Verify with the carrier what their allotted time is to submit a claim Note Failure to follow these procedures may result in no reimbursement for damages from the freight company O Do not move damaged material from the receiving location It is the receiver s responsibility to provide reasonable evidence that concealed damage did not occur after delivery L1 Do not continue unpacking the shipment if it appears damaged Retain all packaging Take photos of damaged material if possible O Notify the carrier s terminal of the damage immediately by phone and mail Request an immediate joint inspection of the damage by the carrier and consignee O Notify your Trane representative of the damage and arrange for repair Have the carrier inspect the damage before making any repairs to the unit Unit Storage Isolate all side panel service entrances and base pan openings such as conduit holes and supply and return air openings from the ambient air until the unit is ready for startup If relocating the unit is necessary after the initial delivery position the unit on the open trailer so the inlet hood is facing the rear of the trailer
84. ipated return air dry bulb tempera ture Set the lower limit setpoint to 10 F less than the supply air dry bulb setpoint This control strategy prevents e RA the energy recovery device from potentially adding to the load seen by the cooling and or heating system of the unit but rather utilizing the device only at those times when it provides true operating energy savings If using the FAU to deliver cold dry conditioned air to the building outdoor air is cooled to a low dew point but not reheated use the dry bulb control option Cross Leakage All energy wheels have some cross leakage Therefore do not use energy wheels in applications involving toxic or hazaradous air streams The percentage of cross leakage depends on the pressure differentials across the wheel section With Trane Packaged FAU energy wheels the exhaust air transfer ratios are typically low lt 4 e RA wheel wheel off off frost CA setpoint application Figure O SO 2 Dry bulb control in a neutral DB dry DP FAXA SVX01B EN Supply Air Dehumidification Unit 1 Occupied Sequence During occupied mode the primary function of the unit is to provide ventilation air to the space Upon entering the occupied mode the outside air damper is opened and the supply air fan will start Drying Mode The unit will enter the drying mode when the OA dew point exceeds the SA drying setpoint dew point The SA drying setpoint can be reset down ba
85. it 40 Convenience outlet 0 none A 115V factory wired 115V field wired Digit 41 Extended grease lines 0 none extended grease lines Digit 42 Agency approval 0 no agency approval UL approval Digit 43 Roof curb 14 curb 24 curb e TRANE Installation Packaged Fresh Air unit Accessory Model Number Description Following is a complete description of the Packaged FAU accessory model number Each digit in the model number has corresponding code that identifies specific accessory options P F K A 031 3 A A0 B C 0 A A 0 A 0 A 0 A 0 A 1 2 3 4 567 8 9 1011 12 13 144 15 16 17 18 19 20 21 22 23 24 Digit 1 Parts accessories P parts accessories Digit 2 Unit type F fresh air unit Digit 3 Field installed kits K field installed kits Digit 4 Development sequence A development sequence Digits 5 6 7 Nominal size 031 3100 cfm 040 4000 cfm 051 5100 cfm 066 6600 cfm Digit 8 Unit voltage 3 230 60 3 4 460 60 3 6 208 60 3 Digit 9 Roof curb 0 14 24 acoustical D 14 curb for unit w ERV 24 extended for unit w ERV 24 extended acoustical for unit w ERV Digits 10 11 Design sequence A0 design sequence Digit 12 Filter type 0 none A 2 pleated media 2 cleanable C 2 pleated media total energy wheel only D 2 cleanable total energy wheel only E 2 ple
86. k all belt tensions are properly adjusted all fans rotate freely UTighten locking screws bearing set screws and sheaves QEnsure bearing locking collars do not wobble when rotated all air filters are properly installed with consideration of size and air flow Ductwork CI Verify that all ductwork conforms to NFPA 90A or 90B and all applicable local codes UEnsure all ductwork is properly sealed and routed between the unit and or roof curb Unit Piping OWVerify the condensate drain piping is complete for the unit drain pan Install and tighten the condensate P trap drain plug per Figure I MR 2 on page 26 OPrevent refrigerant piping from rubbing against other objects Fans OManually rotate all fans to ensure free movement Verify that all of the fan mounting hardware is tight Outside Air Damper Cilnspect all damper hinges and pins to ensure all moving parts are secure OWVerify all damper linkages move freely and travel from full open to full closed Return Air Damper Cilnspect air damper and linkage OWVerify air damper has unrestricted travel Total Energy Wheel CI Verify the rotor rotates freely by hand CI Verify the motor rotation is correct the air flow orientation is correct by referencing the identification markings on the cassette CICheck that the belt is on correctly and adjusted properly CI Verify the seals are firmly clipp
87. lean the refrigerant coil use a soft brush and sprayer such as a garden pump or high pressure type with a quality detergent like SPREX AC OAKITE 161 OAKITE 166 or COILOX Note If detergent is strongly alkaline i e has a pH value greater that 8 5 after mixing an aluminum corrosion inhibitor must be added Coil Cleaning Procedure 1 Turn off gas supply to the gas heaters and disconnect power to the unit 2 Remove enough panels and components from the unit to gain access to the coil 3 Use a soft brush to remove loose dirt and debris form both sides of the coil 4 Straighten coil fins with fin comb as required 5 Mix the detergent with water according to the manufacturers instructions Observe all recommendations of the cleanser manufacturer The coil cleanser manufacturer s recommendations warnings and cautions will at all times take precedence to these instructions A warning Hazardous pressure Coils contain refrigerant under pressure When cleaning coils maintain coil cleaning solution temperature under 150 F to avoid excessive pressure in the coil Failure to follow these safety precautions can cause coil bursting which can result in death or serious injury 1 Place solution in the sprayer Be sure to follow these guidelines if using a high pressure sprayer a Minimum nozzle spray angle is 15 b Spray solution at 90 to the coil face c Keep sprayer nozzle at least six inches
88. load 2 load 3 load 4 Select the DSS that is the largest of the three sets of DSS calculations Select a disconnect switch size equal to or greater than the DSS value calculated Set 4 Units with Electric Heat Dual Source Power Dual source power is required only on some 208V and 230V units when provided with electric heat Those units are size voltage elechtkW _ 031 208V or 230V 42 kW or larger 040 208V or 230V 42 kW or larger 051 208V or 230V 70 kW or larger 066 208V or 230V 70 kW or larger Dual Source Power For units with dual source power use two different sets or MCA and MOP calculations one for each power connection MCA1 and represent the values calculated for the operation of the compressors and condenser fans For the calculations of MCA1 and use the instructions from set 1 previously in this section MCA2 and MOP2 represent the values calculated for the operation of the unit in heating mode MCA 1 25 x load 3 if heater kW is less than 50kW or 1 0 x load 3 if heater kW is 50kW or greater MOP2 1 25 x load 3 Select an overcurrent protective device rating for the heating circuit equal to the MOP2 value If the MOP2 value does not equal a standard device size as listed in NEC 240 6 select the next lower stan dard device rating If the selected MOP2 is less than the MCA2 then reselect the lowest standard device size that is equal to or larger than the MC
89. m the inside perimeter of the curb Installation Preparation Before installing the unit perform the following procedures to ensure proper unit operation 1 Verify the roof curb is level To ensure proper unit operation install the unit level zero tolerance in both horizontal axes Failure to level the unit properly can result in condensate management problems such as standing water inside the unit Standing water and wet surfaces inside units can result in microbial growth mold in the drain pan that may cause unpleasant odors and serious health related indoor air quality problem 2 Allow adequate service and code clearances as recommended in Service Access section on page 10 3 Position the unit and skid assembly in its final location Test lift the unit to determine exact unit balance and stability before hoisting it to the installation location See Figure I IP 2 on page 41 for typical rigging procedures including cautions and proper uses of such equipment as fork lifts spreader bars and hooks FAXA SVX01B EN e TRANE Installation Typical exterior dimensions outdoor side view unit without total energy wheel ft in p 5 5 F SEE DETAL SEE DETAIL A 7 10 1 2 SEE DETAIL detail B MAIN POWER WIRING ENTRANCE NOTE DRILL OR PUNCH HOLE IN COVER PLATE FOR SMALLER CONDUIT CONNECTION 24 V
90. mance Log Complete this log at unit startup model serial date job name Key options O hot gas condenser reheat O return air damper O heat gas electric none total energy recovery wheel TRAQ damper Unit line voltage L1 L2 L2 L3 L1 L3 L1 ground L2 ground L3 ground Visual observation of the refrigerant circuit Evaporator coil clean Oyes Ono Condenser clean Oyes Ono Air filters clean Oyes Ono Fan belts in good condition Oyes Ono Bubbles in sightglass Oyes Ono Dry sightglass Oyes Ono Evaporator coil frosting Oyes Ono Additional notes Installation Compressor or off Oon O off A B circuit 1 circuit 2 compressor B C D compressor amps L1 L2 L3 refrigerant chg if known suction pressure suction temperature superheat discharge pressure comp liquid line pressure liquid line temp subcooling circuit 1 circuit 2 condenser fan motors 2B5 286 2B7 motor Lloff motor amps L1 L2 L3 Reheat coil on or off during test Outside air temp Leaving air temp DB DB WB WB 54 FAXA SVX01B EN Installation e TRANE Electric heat heater kW heater stages installed heater stages tested heater amp draw as tested L1 L2 L3 entering air temp as tested leaving air t
91. n chlorine fluorine and carbon HCFCs Not all refrigerants containing these compounds have the same potential impact to the environment Trane advocates the responsible handling of all refrigerants including industry replacements for CFCs such as HCFCs and HFCs Responsible Refrigerant Practices Trane believes that responsible refrigerant practices are important to the 78 Maintenance environment our customers and the air conditioning industry All technicians who handle refrigerants must be certified The Federal Clean Air Act Section 608 sets forth the requirements for handling reclaiming recovering and recycling of certain refrigerants and the equipment that is used in these service procedures In addition some states or municipalities may have additional requirements that must also be adhered to for responsible management of refrigerants Know the applicable laws and follow them Also pay specific attention to the follow ing recommendations Whenever removing refrigerant from air conditioning equipment recover it and reuse recycle reprocess reclaim or properly destroy Always determine possible refrigerant recycling or reclaiming requirements before beginning recovery Ouestions about recovered refrigerants and acceptable refrigerant quality standards are addressed in ARI Standard 700 Use approved containment vessels and safety standards Comply with all applicable transportation standard
92. n of both shafts Fan and motor shafts should operate parallel to each other for maximum belt and bearing life Shim as necessary under the motor or fan bearings to obtain proper alignment 3 Check the fan motor sheave alignment with straight edge or a tightly pulled string For sheaves of different widths place a string in the center groove of each sheave and pull it tight for a center line 4 Once the sheaves are properly aligned tighten sheave set screws to proper torque 5 Check belt tension 6 If required adjust belt to the minimum recommended tension 7 Retighten bearing set screws to the proper torques after aligning the sheaves 8 Check the fan bearing locking collars for tightness on the shaft To tighten the locking collar loosen the set screw and slide the collar into its proper position over the extended end of the inner case Tighten the set screw 9 During air balancing verify the sheave alignment belt tension and that the shaft is parallel For uneaven width sheaves use a taut string down the L Z center of both sides Fixed Sheave Straightedge V Fixed Sheave Straightedge should touch sheave at top and bottom Straightedge should touch sheave at top and bottom Fixed Sheave Straightedge Figure M MP 3 Fan shaft and motor sheave alignment FAXA SVX01B EN Roxa BO ___ Force Scale Small O Ring Span Scale Large e 7 P O Ring
93. nd repeat the leak test Also use soap bubbles to check for leaks when nitrogen is added Never pressurize the unit above 200 psig 5 Retest the system to make sure new connections are solid 6 If a leak is suspected after the system is fully charged with refrigerant use a halogen leak detector halide torch or soap bubbles to check for leaks Refrigerant Evacuation For field evacuation use a rotary style vacuum pump capable of pulling a vacuum of 100 microns or less When connecting the vacuum pump to a refrigeration system it is important to manifold the pump to both the high and low side of the system Follow the pump manufacturer s directions CAUTION Motor winding damage Do not use a Meg ohm meter or apply power to the winding of a compressor while it is under a deep vacuum This may damage the motor windings FAXA SVX01B EN Maintenance e TRANE AA WARNING Hazardous pressures If using a heat source to raise the tank pressure when removing refrigerant use only warm water or heat blankets to raise the tank temperature Do not exceed 150 F Do not under any circumstances apply direct flame to any portion of the refrigerant cylinder Failure to follow these safety precautions can cause a violet explosion that can cause death or serious injury Charging the Refrigerant System Ay Freezing temperatures Do notallow liquid refrigerant to contact skin If it does treat
94. ndition the outdoor air use the total energy wheel option to recover energy from building exhaust Controlling an Energy Recovery Ventilator One way to control an energy recovery device is to turn it on and off with the FAU system exhaust fan In this case the total energy wheel enables when the unit is in occupied mode and the exhaust fan is running While this control method is certainly simple and effective in some applications it may not provide the expected energy saving benefit particularly when cold wheel off i wheel off 1 frost CA setpoint Figure O SO 1 Dry bulb control in a cold DB dry DP application 64 Operation air vs neutral air is supplied to the building Another more effective approach is to use the outdoor air dry bulb to deter mine when to energize or de energize the energy recovery device See Figure AC 7 for an example of this simplified version of energy recovery In addition to being more effective from a control standpoint it s also a very simple control method because the total energy wheel only enables when all of the following are true unit is in occupied mode exhaust fan is enabled outside air temperature is above the upper limit setpoint default setpoint 80 F or below the lower limit setpoint default setpoint 45 F outside air temperature is above the frost protection setpoint default setpoint 12 F Set the upper limit setpoint to the antic
95. ntrol Wire Sensor Subbase wee without Cover Wall Mounting Wall Surface Plastic Anchors for Wall Installation Sensor Subbase without Cover Seal these areas before mounting the subbase Figure 4 Typical zone sensor installation FAXA SVX01B EN Figure l IP 5 Grasslin time clock option FAXA SVX01B EN Installation e TRANE Time Clock Option The time clock option has a programmable timer that is factory wired to the unoccupied input to provide on off control The time clock will not allow the unit to pass through the night setback morning warmup mode except on units with optional night heat morning warm up or programmable night setback See Figure l IP 5 The timeclock a Digi 20 by Grasslin is inside the control panel but accessible with the control panel door closed This same type timer is also used for pro grammable night setback morning warm up Time Clock Installation 1 Ensure operating temperature is within 4 to 131 F 2 Locate the time clock at least 5 feet away from any large electrical contact or machinery to avoid possible electrical interference problems 3 Provide a separate independent circuit for the time clock power supply 4 Since all electronic instruments are sensitive to voltage spikes pay close attention tot he following a If possible supply power to the electronic time clock from a phase different than the one
96. number indicates the fan wheel width 107 1075 160 1600 110 1100 162 1625 112 1125 165 1650 115 1150 167 1675 117 1175 170 1700 120 1200 172 1725 122 1225 175 1750 125 1250 177 1775 127 1275 180 1800 130 1300 182 1825 132 1325 185 1850 135 1350 187 1875 137 1375 190 1900 140 1400 192 1925 142 1425 195 1950 145 1450 197 1975 147 1475 200 2000 150 1500 202 2025 152 1525 205 2050 155 1550 207 2075 157 1575 210 2100 Digits 24 25 Supply fan horsepower 1 2 03 3 5 7 o ol iow gm wow 5 10 15 15 Digit 26 Fan motor type A standard efficiency ODP fan motor B high efficiency ODP fan motor Digit 27 Coil protection 0 none A corrosion inhibiting coating Digit 28 Unit cabinet protection 0 standard prepainted steel finish A corrosion inhibiting coating Digit 29 Filter type 0 field provided filter 1 dirty filter switch DFS with field provided filter 2 2 pleated media filters 3 2 pleated media filters amp DFS Digit 30 System control A supply air dehumidification B supply air dehimidification with zone RH reference E zone dehumidification FAXA SVX01B EN FAXA SVX01B EN Installation e TRANE F zone dehumidification with OA RH reference G supply air temperature control no dehumidification J zone temperature control no dehumidification Digit 31 C
97. ode the fan economizer and mechanical cooling cycle to control zone temperature Economizer functions will enable when the difference in the enthalpy of the OA and zone is adequate Mechanical cooling supplements economizer capacity as required Heating Mode During unoccupied heating mode fan and heating capacity cycle to maintain the unoccupied zone heating setpoint Supply Air Temp Control No Dehumidification Unit 1 Occupied Sequence During occupied mode the primary function of the unit is to provide ventilation air to the space Upon entering FAXA SVX01B EN Operation e TRANE the occupied mode the outside air damper opens and the supply air fan starts Cooling Sequence The unit stages cooling capacity to maintain the supply air cooling setpoint The supply air cooling setpoint can be reset down based on HI selectable parameters OA sensor zone sensor if installed Heating Sequence The unit stages heating capacity to maintain the supply air heating setpoint The supply air heating setpoint can be reset up based on HI selectable parameters OA sensor zone sensor if installed The supply air heating setpoint must be lower than the supply air cooling setpoint 2 Unoccupied Sequence In unoccupied mode the fan stops and the OA damper closes Zone Temp Control No Dehumidification Unit 1 Occupied Sequence During occupied mode the primary function of the unit is to provide ventila
98. on considerations Follow the procedures in this section to ensure the installation is complete and adequate for proper unit operation Verify this checklist is complete before beginning unit installation O Verify the unit size and tagging with the unit nameplate to ensure the correct unit is received Inspect the unit for possible shipping damage and make any necessary claims with the freight delivery company immediately Before installing the roof curb remember to allow minimum recommended clearances for routine maintenance and service Refer to unit dimensions and clearances on submittals or in Dimensions and Weights section on page 15 O Verify the unit roof curb is installed properly prior to beginning unit installation See the Roof Curb Installation Manual FAXA SVNO1B EN L1 Make proper acoustic considerations before installing unit Do not install unit above sound senstive locations L1 Allow adequate space for service and operating clearances Reference page 10 L1 Make provisions for correct supply power and note electrical connection knockouts locations on the unit submittals or in the Dimensions and Weights section on page 15 This includes main power and dual power connections for electric heat Note Verify electric stub out within roof curb assembly if using bottom electrical knockouts L Electrical supply power must meet specific balance and voltage requirements as described in the Electrical R
99. only ARES eit Pto Bau og T 7 NZ NZ NENG NN Main Condenser Supply Fan 61 e TRANE 62 Evaporator 1 Expansion Valves Operation FAU Without Reheat rd Figure O GI 10 shows the Packaged FAU lt DX system using a refrigerant circuit lt design without reheat Dehumidification Drying Dehumidification Consider Figure O GI 8 If the outdoor air dew point or zone RH is above the drying setpoint the FAU will dehumidify the outdoor air 10096 outdoor air enters the FAU h1 The unit filters cools h2 and Dewpoint Temperature dehumidifies the air as it is drawn through Dry Bulb Temperature the evaporator coils Air leaves the evaporator coils saturated at a preset dew Chart O GI 8 Psychrometric chart with point setpoint h3 Since the dew point setpoint is fully adjustable the desired dew point condition is maintained at all load conditions Cooling or Heating Consider Chart O GI 9 If the outdoor air dew point is equal to or below the dew point setpoint the FAU will heat or cool the outdoor air to separate and adjust cooling or heating setpoints 10096 outdoor air enters the FAU t1 The unit filters and cools or heats the air as it is drawn through the evaporators and dehumidification no reheat Dewpoint Temperature heating section The air leaves the FAU at Dry Bulb Temperature the cooling or heating setpoint and equal to or below the
100. onnect all electrical power including remote disconnects before servicing unit Follow proper lockout tagout procedures to ensure power cannot be inadvertently energized Failure to do so can cause death or serious injury WARNING Disconnect gas supply Before servicing unit FIRST turn off the gas supply Failure to turn off the gas supply can cause death or serious injury 1 Inspect unit air filters Clean or replace if airflow is blocked or if filters are dirty 2 Inspect coils for icing Icing on the coils may indicate low airflow supply restricted airflow from dirty fins evaporator frost protection sensor problems or a shortage of refrigerant flowing through the coil 3 Check the condition and tension of fan belt Adjust tension if belt is floppy or squeals continually 4 Verify the total energy wheel seals have not become worn or damaged Replace as necessary Note Check and adjust belt tension at least twice daily the first days of new belt operation Belt tension will rapidly decrease until the belts are run in 5 Check and record operating pressures 6 Inspect and clean total energy wheel as needed Semi Annual Maintenance 1 Verify the fan motor is properly aligned and bolted tight to the motor frame 2 Lubricate fan bearings with any of the following types grease NLGI N 3 e Mobil Mobilux EP3 ESSO Beacon 3 Shell Alvania FET3 Fina Marson HTL3 3 With power disc
101. onnected manually rotate the fan wheel to check for obstructions in the housing or interference with fan blades or inlet guide vane option Remove obstructions and debris Center the fan wheel if necessary 4 Check the fan assembly sheave alignment Tighten set screws to their proper torques 5 Check the total energy wheel linkage belt tightness Adjust as necessary Note Perform this procedure monthly if the unit is in a coastal or corrosive environment Annual Maintenance Check and tighten all set screws bolts locking collars and sheaves 1 Inspect clean and tighten all electrical connections 2 Visually inspect the entire unit casing for chips or corrosion Remove rust or corrosion and repaint surfaces 3 Visually check for leaks in refrigerant piping 4 Inspect fan motor and control contacts Replace badly worn or eroded contacts Inspect the thermal expansion valve sensing bulbs for cleanliness good contact with the suction line and adequate insulation from ambient air Note For units with gas heat refer to the Reznor Installation Form RGM 401 for proper maintenance procedures of gas heaters FAXA SVX01B EN System Checks Before proceeding with technical trouble charts or controls checkout complete the follow system analysis 1 Measure actual supply voltage at the compressor and at motor terminals with the unit running Voltage must be within the range listed on the motor nameplate
102. onnected to a gas supply capable of supplying its full rated capacity at a pressure not less than 5 w c 1 62 kPa nor greater than 14 w c 0 5 psi for natural gas Size and install all gas piping in accordance with ANSI Standard Z223 1 1992 or latest edition National Fuel Gas Code In Canada gas piping should be according to CAN CGA B149 See Table I MR 1 for correct gas supply piping size If gas pressure is excessive on natural gas applications install a pressure regulating valve in the line upstream from the main shutoff valve for each independent heater 3 Adequately support the piping to prevent strain on the gas manifold and controls 4 To prevent the mixing of moisture with gas run the takeoff piping from the top or side of the main A MANUAL SHUTOFF VALVE WITH 1 8 N P T PLUGGED TAPPING ACCESSIBLE FOR TEST GAGE CONNECTION MUST BE INSTALLED GAS 3 76 MM Li DRIP LEG UPSTEAM OF THE GAS SUPPLY CONNEC TION TO THE APPLIANCE GROUND JOINT UNION TO CONTROLS MIN PLUGGED 1 8 N P T TEST GAGE CONNECTION Figure I MR 1 Gas pipe connection 33 e TRANE Installation 5 Pipe directly in to the manual shutoff valve 6 Install a 1 3 2 mm N PT plugged tapping accessible for test gauge connection immediately upstream of the gas supply connection to the appliance 7 Provide a drip leg in the gas piping near the gas duct furnace 8 Make certain that all c
103. onnections have been adequately doped and tightened 9 Remove temporary shipping panels and install the permanent panels that ship in the return air section of the unit CAUTION Valve stress hazard Do not overtighten the inlet gas piping into the valve This may cause stresses that would crack the valve Note Use pipe joint sealant resistant to the action of liquefied petroleum gases regardless of gas conducted warning Explosion hazard Failure to follow recommended safe leak test procedures can cause death or serious injury Note Check all pipe joints for leakage using a soap solution or other approved method The appliance and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system Table I MR 1 Gas pipe sizes at 0 5 psig 3 5 Pa or less 0 5 w c 124 4 Pa 0 60 specific gravity gas maximum pipe capacity for gas pressures ft 5 hr 3 nominal internal pipe length ft m iron pipe diameter 10 20 30 40 50 60 70 80 90 100 125 150 175 200 in in mm 3 0 6 1 91 122 15 2 18 2 21 3 24 4 27 4 30 5 38 1 45 7 53 3 61 0 1 2 0 622 175 120 97 82 73 66 61 57 53 50 44 40 37 35 16 4 96 3 40 2 75 2 32 2 07 1 87 1 73 1 61 1 50 1 42 1 25 1 13 1 05 0 99 3 4 0 824 360 250 200 170 151 138 125 118 110 103 93 84 77 72 21 10 2 7 08 5
104. ons Olnspect all control components tighten any loose connections properly sized and protected power supply wiring to a field supplied installed disconnect and unit power terminal block or to the optional unit mounted disconnect switch ground the unit Field Installed Control Wiring Optional LIComplete the field wiring connections Note All field installed wiring must comply with NEC and applicable local codes Gas Heat Requirements L1Gas supply line properly sized supported and connected to unit gas train Olnstall a a inch N PT plugged tapping accessible for test gauge connection i immediately upstream of gas supply connection to unit OGround union must be installed adjacent to the manifold for easy servicing ODrip leg installed in the gas piping near the unit LlAdditional shutoffs are located externally of the jacket enclosure where required by local code gas piping joints properly sealed L1Gas piping leak checked with a soap solution supply gas pressure adequate ORefer to the Reznor Installation Form RGM 401 for additional information Note All gas piping must comply with applicable local codes FAXA SVX01B EN FAXA SVX01B EN Installation e TRANE Pre Startup Checklist Complete this checklist after installing the unit to verify all recommended installation procedures are complete before unit startup This does not r
105. ontrol wiring in same conduit with high voltage power wiring 1 Run wires between the unit control panel and the zone sensor subbase To determine the number of wires required refer to the unit wiring diagrams 2 Connect the wiring to the appropriate terminals at the unit control panel and at the zone sensor subbase In general zone sensor connections to the unit use the convention of connecting zone sensor terminals to like numbered unit terminals 1 to 1 2 to 2 etc The connection detail is shown on the unit wiring diagrams which are located in the unit control panel 3 Replace the zone sensor cover back on the subbase and snap securely into place Standard Remote Sensor BAYSENS017 When using the remote sensor BAYSENS017 mount it in the space that is to be controlled Wire according to the interconnecting wiring diagrams on the unit Table HP 1 Zone sensor maximum lengths and wire size distance from recommended unit to controller wiring size 0 150 feet 22 gauge 151 240 feet 20 gauge 241 385 feet 18 gauge 386 610 feet 16 gauge 611 970 feet 14 gauge 43 TRANE Installation 1 000 4 2 750 4 500 3 300 2 100 0 542 500 Figure HP 3 Zone sensor mounting hole locations Control Wire Mounting to Junction Box 2 X 4 Handy Box Co
106. ontrol interface options 0 none A LonTalk communications interface LCI comms B LCI comm5 amp generic building automation system GBAS 0 5 VDC C LCI comm5 amp GBAS 0 5 VDC amp ventilation override module VOM D LCI comm5 amp VOM E GBAS 0 5 VDC F GBAS 0 5 VDC amp VOM G VOM Digit 32 Miscellaneous system control options 0 2 none 1 interface for remote human interface Digit 33 Exhaust option 0 none 1 exhaust interface Digits 34 35 36 Exhaust air fan rpm 000 none 127 1275 045 450 130 1300 047 475 132 1325 050 500 135 1350 052 525 137 1375 055 550 140 1400 057 575 142 1425 060 600 145 1450 062 625 147 1475 065 650 150 1500 067 675 152 1525 070 700 155 1550 072 725 157 1575 075 750 160 1600 077 775 162 1625 080 800 165 1650 082 825 167 1675 085 850 170 1700 087 875 172 1725 090 900 175 1750 092 925 177 1775 095 950 180 1800 097 975 182 1825 100 1000 185 1850 102 1025 187 1875 105 1050 190 1900 107 1075 192 1925 110 1100 195 1950 11221125 197 1975 11521150 200 2000 11721175 202 2025 120 1200 205 2050 122 1225 207 2075 125 1250 210 2100 Digits 37 38 Exhaust air fan horsepower 00 5 0 o wo Wl H H H H 1 n 1 2 3 5 7 1 Digit 39 Unit connection type terminal block B non fused disconnect switch Dig
107. ossible but without exceeding grip range of bulb seal and without pressing the bulb down against the seal face 2 Bump the motor If the motor will not turn the seal is too close Nudge it back where needed The seal will seek its equilibrium position based on the closest part of the sealing face Because the seal is meant to be a noncontact seal small gaps may be seen between seal and sealing surface when it reaches the equilibrium position Seal leakage is meant to be under 5 at one inch of differential between supply and exhaust Some seal run in is common and will result in small amounts of wear in the neoprene Unit Startup Checklist 1 Ensure all fans rotate is in the direction of the arrow on the fan housing If rotation is incorrect first verify the incoming power phasing is correct If it is correct switch wires on the fan contact so the fan is properly phased 2 Check the fan belt condition and tension Adjust the tension if belts are floppy or squeal continually Replace worn or fraying belts in matched sets 3 Check voltage at all compressor terminals Actual voltage should be within 1096 of nameplate voltage 4 Check voltage imbalance from these three voltage readings at each compressor Maximum allowable voltage imbalance phase to phase is 296 FAXA SVX01B EN FAXA SVX01B EN Installation e TRANE 5 Check amp draw at compressor terminals RLA and LRA is on the unit nameplate 6 Measur
108. out TE wheel 1 HEATING SECOND SECTION GAS OPTION HEATER OPTION HORIZONTAL CONTROL PANEL REHEAT COMPRESSOR AND OUTDOOR CONDENSER COIL unit with TE wheel REURN AR J Ll SUPPLY FAN VERTICAL DOW m SECTIONS l DISCHARGE 8i Ia ha 9 HEATING SECOND 8I p 7 Tat L SECTION GAS l H BI OPTION HEATER Z I moy t OPTION ly I ml L_ _ _ ELOW Zl sl L EXHAUST FAN I N SECTION CONTROL PANEL REHEAT COMPRESSOR AND EXHAUST OUTDOOR CONDENSER COIL DISCHARGE OPTION FAXA SVX01B EN e TRANE Maintenance Component arrangement unit size 051 amp 066 unit without TE wheel N VERTICAL DOW DISCHARGE DISCHARGE HORIZONTAL OPTION Sa o lt n E 20 ozz oz zo o mo In ze i RE r REHEAT COMPRESSOR AND OUTDOOR CONDENSER COIL III III NOlLdO 1SnvHX3 III unit with TE wheel HORIZONTAL DISCHARGE OPTION WN VERTICAL DO DISCHARGE HEATING SECTION OPTION 7 tad FAN SECTION REHEAT COMPRESSOR AND OUTDOOR CONDENSER COIL LX ae 71 FAXA SVX01B EN e TRANE Maintenance Total energy wheel cassette locations typical indoor side views unit size 031 TOTAL ENE
109. perating parameters See Figure I IP 6 to reference the HI keypad Remote Human Interface Panel The remote human interface RHI panel is identical to the unit mounted HI with the exception of the unit select key This key allows the operator to switch from one unit to the next to program or view status information regarding a particular unit The RHI functions the same as the unit mounted HI with two exceptions The first is the test start function The operator can view the service parameters but can only initiate the service test function at the unit The RHI door has a locking screw to deter access by unauthorized person nel Additionally the RHI can control up to four different units Location Recommendations The HI microprocessor module is mounted inside a molded plastic enclosure for surface mounting It is not weatherproof Therefore it is only applicable for indoor use Locate the RHI panel in an area that will ensure the communication link between the panel and the unit s does not exceed 5 000 feet maximum or pass between buildings See Table I IP 2 The run length of the low voltage AC power wiring to the remote HI must not exceed three 3 ohms conductor Refer to Table I IP 3 46 Installation Menus C ome g L Status L Setpoints Test N di Ya Ea N Diagnostics Start Bervice Custom J Auto Setup Configuration Previous A J Next
110. plicable electrical codes An optional communication link provides a serial communication interface SCI between Tracer Summit and each Fresh Air unit FAU in the system The FAU system can have a maximum of 12 FAUs per connection link to Tracer Summit Use a single 18 AWG shielded twisted pair wire with stranded thinned copper conductors to establish each communication link between Tracer Summit and each unit Installation Checklist The checklist listed below is a summary of the steps required to successfully install a Packaged Fresh Air unit This checklist is intended to acquaint the installing personnel with what is required in the installation process It does not replace the detailed instructions detailed in the applicable sections of this manual General Unit Requirements OAssemble and install the roof curb and necessary gaskets Make sure the curb is level Olnstall and secure the ductwork to the curb or unit LICheck unit for shipping damage and material shortage Refer to the Receiving Checklist on page 9 ORig the unit Refer to Figure I IP 2 page 41 LIPlace the unit on curb and check leveling Ensure that the unit to curb seal is tight without buckles or cracks Olnstall an appropriate drain line to the evaporator condensate drain connection Refer to Figure I MR 2 on page 35 Electrical Requirements LlVerify that the electrical power supply characteristics comply with the unit nameplate specificati
111. porator circuit is first on and last off so reheat energy is available at full and part load conditions For those conditions where the reheat condenser capacity is insufficient to meet reheat demand optional electric or gas heat can provide additional reheat capacity Since both the dew point setpoint and discharge temperature setpoint are fully adjustable the desired supply air conditions are maintained at all load conditions Cooling or Heating Consider Figure 6 If the outdoor air dew point or zone RH is equal to or below the drying setpoint the FAU will heat or cool the outdoor air to separate and adjust cooling or heating setpoints At t1 or t3 10096 outdoor air enters the FAU The FAU filters and cools or heats the air as it is drawn through the evaporators and heating section The air leaves the FAU at the cooling or heating setpoint t2 or t4 and equal to or below the dew point setpoint Main Compressors Reheat Compressor Reheat Condenser Evaporator Subcooler Figure O GI 7 Refrigeration system diagram with reheat FAXA SVX01B EN Mi LEE ae 2 NYNUNGUNVUN UN Reheat Outdoor Condenser Liquid Valve Receiver Dewpoint Temperature Dry Bulb Temperature Figure O GI 5 Psychrometric chart with dehumidification and reheat Dewpoint Temperature Dry Bulb Temperature Figure O GI 6 Psychrometric chart with cooling and heating
112. pport side rail E A end 5 side rail 17 duct support side rail E A end 6 side rail 18 duct support side rail S A end 7 corner angle 19 duct support side rail S A end 8 corner angle 20 6 wood nailer side 9 corner angle 21 6 wood nailer side 10 corner angle 22 6 wood nailer end 11 crossmember 23 6 wood nailer end 12 duct support end rail Note Center lines connect corresponding holes in the 8 Note Center lines connect rails and crossmember All side rails corresponding holes in the rails and crossmember All screws are installed from outside the curb screws are installed from outside the curb p di corner angle endrail i return air end 2 crossmember i Typical std curb corner assembly for units Typical std curb rail and crossmember assembly for units without without the total energy wheel option the total energy wheel option 12 FAXA SVX01B EN e TRANE Installation Standard roof curb assembly maea units with the TE wheel 1 end rail R A E A end 15 duct support end rail 2 end rail S A end 16 duct support side rail R A end 3 side rail 17 duct support side rail R A end 4 side rail 18 duct support side rail E A end 5 side rail 19 duct support side rail E A end 6 side rail 20 duct support side rail S A end 7 corner angle 21 duct support side rail S A end 8 corner angle 22 crossmember 9
113. rail 17 between end rail 1 and end rail 12 with flanges positioned away from the exhaust air opening and attach it with two sheet metal screws at each end Supply Air Opening Assembly 13 Place end rail 13 between side rail 4 and side rail 5 with flanges positioned away from the supply air opening and attach it with two sheet metal screws at each end Use rails 18 and 19 as spacers 14 Place side rail 18 between end rail 2 and end rail 13 with flanges positioned away from the supply air opening and attach it with two sheet metal screws at each end 15 Place side rail 19 between end rail 2 and end rail 13 with flanges positioned away from the supply air opening and attach it with two sheet metal screws at each end Units with the Total Energy Wheel Only 16 Attach corner angle 26 using five sheet metal scres to the side of duct support 25 without flanges Place the clearance holes in the corner angle toward the top of the curb 17 Align side rail 23 next to side rail 3 and attach crossmember assembly 25 and 26 perpendicular to both side rails at the joint using ten sheet metal screws 11 e TRANE Installation considerations Standard roof curb assembly Curb legend units without TE wheel option 1 end rail R A end 13 duct support end rail 2 end rail S A end 14 duct support end rail R A end 3 side rail 15 duct support side rail R A end 4 side rail 16 duct su
114. ration e TRANE 2 Unoccupied Sequence In unoccupied mode the fan is stopped and the OA damper is closed Supply Air Dehumidification with Zone RH Reference Unit 1 Occupied Sequence During occupied mode the primary function of the unit is to provide ventilation air to the space Upon entering the occupied mode the outside air damper is opened and the supply air fan will start Drying Mode The unit will enter the drying mode when the OA dew point exceeds the SA drying setpoint dew point The SA drying setpoint can be reset down based on zone relative humidity conditions or OA dew point conditions Drying functions will have priority over cooling mode Upon entering drying mode the first compressor will stage up While in drying mode the first compressor stage will always remain active This allows condenser reheat when ordered to be available as required during drying operation Additional compressors will be sequenced to match unit capacity to the latent load Reheat will be controlled to meet a supply air reheat setpoint that is a minimum of 3 F greater than the supply air drying setpoint The supply air reheat setpoint can be reset up based on OA or zone temperature conditions When available condenser reheat will be cycled to achieve a time weighted average of the reheat setpoint If primary heat reheat is user enabled additional reheat capacity will be made available to match sensible load Cool
115. rb unit sizes 051 amp 066 with TE wheel EXHAUST OPENING OPTION RETURN OPENING OPTION THRU BASE ELECTRIC HEAT OPTION SUPPLY OPENING CONTINUOUS WOOD NAILER THRU BASE ELECTRICAL ENTRANCE 1 4 1 8 5 1 2 3 7 1 8 7 1 7 8 1 10 3 4 10 3 4 3 5 8 12 11 1 4 16 7 7 8 20 9 6 WOOD NAILER 2 FAXA SVX01B EN 31 e TRANE Unit and accessory weights Installation Table I DW 1 Typical unit unit with total energy wheel and roof curb weights unit base unit total energy wheel unit roof curb for unit w o TE wheel roof curb for unit with TE wheel size weight base weight low high acoustic low high 031 4600 1460 282 613 1500 350 766 040 4700 1520 282 613 1500 350 766 051 5600 1920 282 613 1500 350 766 066 6000 1970 282 613 1500 350 766 1 Base unit operating weight is for units with the condenser hot gas reheat option return air and no heat Subtract condenser hot gas reheat weight for cooling only units See Table I DW 2 for weight Table I DW 2 Typical component weights unit single gas MBh dual gas MBh electric heaters condenser hot size 125 150 200 250 300 350 400 250 300 400 500 600 700 800 20 84kW 100 122 kW gas reheat 031 201 2177 247 295 295 333 402 434 60 150 040 200 2177 247 25 295 333 402 434 494 60 150 051 20 2177 247 295 295 333 361 402 434 494 50 590 60 100 270 066 200 217 24 2
116. s when shipping refrigerant containers Use recycling equipment to minimize emissions while recovering refrigerant Always attempt to use methods that pull the lowest possible system vacuum while recovering and condensing refrigerant into containment When leak checking be aware of any new leak test methods that eliminate refrigerant as a trace gas Do not use refrigerant or solvents that have ozone depletion factors to clean system components and parts Trane recommends clean up methods using filters and dryers Properly dispose of used materials Take extra care to properly maintain all service equipment directly supporting refrigerant service work such as gauges hoses vacuum pumps and recycling equipment Stay aware of unit enhancements conversion refrigerants compatible parts and manufacturer s recommendations that will reduce refrigerant emissions and increase equipment operating efficiencies Follow specific manufacturer s guidelines to convert existing systems To help reduce power generation emissions always attempt to improve equipment performance with improved maintenance and operations that conserve energy resources Refrigerant Leak Testing WARNING Confined space hazard Do not work in confined spaces where sufficient quantities of refrigerant or other hazardous toxic or flammmable gas may be leaking Refrigerant or other gases can displace available oxygen causing possible asp
117. sed on OA dew point conditions Drying functions will have priority over cooling mode Upon entering drying mode the first compressor will stage up While in drying mode the first compressor stage will always remain active This allows condenser reheat when ordered to be available as required during drying operation Additional compressors will be sequenced to match unit capacity to the latent load Reheat will be controlled to meet a supply air reheat setpoint that is a minimum of 3 F greater than the supply air drying setpoint The supply air reheat setpoint can be reset up based on OA or zone temperature conditions When available condenser reheat will be cycled to achieve a time weighted average of the reheat setpoint If primary heat reheat is user enabled additional reheat capacity will be made available to match sensible load Cooling Sequence When not in drying mode the unit will stage cooling capacity to maintain the supply air cooling setpoint The supply air cooling setpoint can be reset down based on HI selectable parameters OA sensor zone sensor if installed Heating Sequence When not in drying mode the unit will stage heating capacity to maintain the supply air heating setpoint The supply air heating setpoint can be reset up based on HI selectable parameters OA sensor zone sensor if installed The supply air heating setpoint must be lower than the supply air cooling setpoint FAXA SVX01B EN Ope
118. size in 4 16x20x2 4 16x20x2 4 20x25x2 4 20x25x2 face area ft 84 84 13 3 13 3 exhaust air filters number size in 4 16x20x2 4 16x20x2 4 16x25x2 4 16x25x2 face area ft 84 84 10 5 10 5 FAXA SVX01B EN 73 e TRANE Maintenance Procedures Before beginning any maintenance procedures heed all warnings and cautions WARNING Hazardous voltage Disconnect all electrical power including remote disconnects before servicing unit Follow proper lockout tagout procedures to ensure power cannot be inadvertently energized Failure to do so can cause death or serious injury WARNING Disconnect gas supply Before servicing unit FIRST turn off the gas supply Failure to turn off the gas supply can cause death or serious injury Periodic Maintenance Checklist O Inspect optional coil guard for debris that may be blocking louvers Clean as required Inspect coil surface for cleanliness Clean as required Refer to Coil Cleaning under Maintenance Procedures L1 Manually rotate fan blades to insure proper orifice clearance Inspect fan orifices for debris and obstructions Clean as required Annual Maintenance Checklist L1 Perform all monthly maintenance inspections L1 Perform seasonal start up checks O Leak test refrigerant circuits Inspect contacts of fan motor contactors and relays Replace all worn contacts O Clean condenser fans Check fan assemblies for proper orifice clearance
119. sonal protection and ventilation when using their product 5 If microbial growth is present remove the contamination Step 2 and thoroughly clean the affected area with an EPA approved sanitizer specifically designed for HVAC use Carefully follow the sanitizer manufacturer s instructions regarding the product usage 6 Rinse the affected surfaces thoroughly with fresh water and a fresh sponge to prevent potential corrosion of metal surfaces 7 Allow the unit to dry completely before putting it back into service 8 Ensure that contaminated material does not contact other areas of the unit or building Properly dispose of all contaminated materials and cleaning solution Determine the cause of any microbial growth mold and take action to ensure it does not reoccur 76 Maintenance Fan and Drive Perform the following procedures according to the Periodic Maintenance Check List Reference Figure M MP 3 for proper fan shaft and motor alignment WARNING Hazardous voltage Disconnect all electrical power including remote disconnects before servicing unit Follow proper lockout tagout procedures to ensure power cannot be inadvertently energized Failure to do so can cause death or serious injury 1 Rotate the fan wheel to be sure it turns freely in the proper direction and is not rubbing on the fan housing inlet or inlet guide vanes If necessary center the fan wheel again 2 Check the positio
120. the cooling process to reheat the sub cooled air as necessary Heating When the outdoor air dry bulb temperature is colder than space conditions require the FAU heats the outdoor air to meet space temperature requirements The Packaged FAU has electric or gas heat options available System Configurations Dedicated outdoor air systems can deliver conditioned outdoor air in one of the following ways 1 Directly to the occupied space with the local terminal unit controlling the space dry bulb temperature See Figure O GI 2 2 Directly to local terminal units which deliver a mixture of the conditioned outdoor air and conditioned recirculated return air to the space See Figure O GI 3 60 Operation 3 Directly to a single space and control the space temperature directly For example this application will provide temperature control of a hotel hallway and ventilation of the adjacent rooms See Figure O Gl 4 Supply Air Temperature Give careful consideration when selecting the FAU supply air temperature Many current system designs control the fresh air unit discharge air to a space neutral dry bulb condition typically about 75 F At some operating conditions reheating the FAU supply air will add cooling load to the space thus requiring the local terminal units to re cool the conditioned outdoor air to meet the space setpoint Therefore to help maintain lower energy costs use reheat only when required to
121. the drain pan thoroughly with fresh water to prevent potential corrosion from the cleaning solution 7 Allow the unit to dry thoroughly before EA Figure M MP 2 Filter placement two racks without return Table 1 Filter sizes in unit size main unit 031 20x16 20x 16 20x 16 040 20x 16 20x 16 20x 16 051 25x20 25 x 16 24x 24 066 25 x 20 20 x 16 20 x 16 Note Filters are ASHRAE 30 or higher 75 e TRANE putting the system back into service 8 Determine and correct the cause of any microbial contamination 9 Be careful that the contaminated material does not contact other areas of the unit or building Properly dispose of all contaminated materials and cleaning solution Inspecting and Cleaning the Fans Inspect the fan section every six months or more frequently if operating experience dictates Clean accumulated dirt and organic matter on the fan interior surfaces following the procedure below 1 Disconnect gas supply and all electrical power to the unit 2 Don the appropriate personal protective equipment PPE 3 Use a portable vacuum with HEPA filtration to remove the loose dirt and organic matter The filter should be 99 97 efficient at 0 3 micron particle size 4 If no microbial growth mold exists thoroughly clean the fan and associated components with an industrial cleaning solution Carefully follow the cleaning solution manufacturer s instructions regarding per
122. tion air to the space Upon entering the occupied mode the outside air damper opens and the supply air fan starts Cooling Sequence The unit stages cooling capacity to maintain the supply air cooling setpoint The supply air cooling setpoint can be reset down based on HI selectable parameters OA sensor zone sensor if installed Heating Sequence The unit stages heating capacity to maintain the supply air heating setpoint The supply air heating setpoint can be reset up based on HI selectable parameters OA sensor zone sensor if installed The supply air heating setpoint must be lower than the supply air cooling setpoint 2 Unoccupied Sequence In unoccupied mode the fan stops and the OA damper closes Control Sequences of Operation Morning Warmup This feature is available on all types of factory installed heat units and on units with no heat This function may still be selected to support systems with heat sources not provided by the fresh air unit At the conclusion of unoccupied mode the selected zone is heated to the user defined morning warmup setpoint The unit is then released to occupied mode There are two types of morning warmup full capacity or cycling capacity Full capacity morning warmup MWU Full capacity morning warmup uses full heating capacity to heat the zone as quickly as possible Full heating capacity is provided until the morning warmup setpoint is met At this point the unit is r
123. tions in the Trane publication Accessory Roof Curb Kit Installation Manual FAXA SVN01B EN Dimensional data for use with curbs other than Trane can be found on pages 15 32 of this manual Note One copy of this manual ships inside the control panel of each unit It is important that you perform periodic maintenance to help ensure trouble free operation Should equipment failure occur contact a qualified Trane service organization for an experienced HVAC technician to properly diagnose and repair this equipment Note Do not release refrigerant to the atmosphere 2003 American Standard Inc If adding or removing refrigerant the service technician must comply with all federal state and local laws Warnings and Cautions WARNING Warnings indicate potential hazardous situations which if not avoided can cause death or serious injury A Cautions indicate a potentially hazardous situation which if not avoided may cause minor or moderate injury Also cautions may alert against unsafe practices CAUTION Cautions indicate a situation that may cause equipment or property damage only Examples follow below A WARNING Hazardous voltage Disconnect all electrical power including remote disconnects before servicing unit Follow proper lockout tagout procedures to ensure power cannot be inadvertently energized Failure to do so can cause death or serious injury CAUT
124. to detect changes in performance In a reasonably clean indoor environ ment such as a school or office building experience shows that reductions of airflow or loss of sensible effectiveness may not occur for ten or more years Where there is moderate tobacco smoke or within cooking facilities reduction in effectiveness can occur much faster In applications experiencing high levels of OA UNIT d FILTER Maintenance e TRANE smoke the energy transfer surfaces may require cleaning as often as every six months Similar washing cycles may also be appropriate for industrial applications such as welding or machining operations involving ventilation of high levels of smoke or oil based aerosols Proper cleaning of the energy wheel should restore latent effectiveness to near original performance Clean the total energy wheel as neces sary to maintain optimum airflow When washing cleaning the wheel take care not to allow water or detergent to come into contact with any of the electrical components Drain holes in the wheel rack are capped and can be removed during cleaning Replace caps to avoid air bypass The single draw hole located upstream of the outside air filters should be utilized for draining during cleaning Ensure no water moisture or excess detergent is left in the energy wheel compartment Use a wet vac vauum cleaner to remove water moisture as needed Air Filter Replacement Filter access doors
125. trol power transformer any other load rated at one amp or more gas heat factory wired convenience outlet Single Source Power Set 1 Cooling only units and cooling with gas heat single source power MCA 1 25 x load 1 load 2 load 4 2 25 x load 1 load 2 load 4 Select an overcurrent protective device rating equal to the MOP value If the MOP value does not equal a standard device size as listed in NEC 240 6 select the next lower standard device rating If the selected MOP is less than the MCA then reselect the lowest standard maximum overcurrent protective device size that is equal to or larger than the MCA provided the reselected device size does not exceed 800 amps Disconnect Switch Sizing DSS if field provided and installed If the unit has a factory installed non fused disconnect switch this sizing equation is not necessary If the disconnect is field provided and installed use the following equation to determine its rating DSS 1 15 x load 1 load 2 load 4 Select a disconnect switch DSS size FAXA SVX01B EN Installation e TRANE equal to or larger than the DSS value calculated Set 2 Units with electric heat single source power non concurrent load To arrive at the correct MCA and MOP values you must perform two sets of calculations one for cooling only set 1 and one for electric heat only set 2 Calculate the MCA and MOP values as if the unit were
126. unit vibration Run the ductwork as far as possible without changing size or direction Do not make abrupt turns or transitions near the unit due to increased noise and excessive FAXA SVX01B EN Installation e TRANE static losses Use elbows with splitters or turning vanes to minimize static losses Poorly constructed turning vanes may cause airflow generated noise Check total external static pressures against fan characteristics to be sure the required airflow is available throughout the ductwork Gas Pipe Sizing Follow the procedure below to size the gas piping to adequately provide gas pressure at the gas heater 1 Find the cu ft hr by using the formula cu ft hr Btu cu ft 2 Refer to Table I MR 1 Match Pipe Run in Feet with appropriate Gas Input Cu Ft hr figure Match this figure to the pipe size at the top of the column For example requires 67 ft 20 4m run of gas pipe to connect a 200 MBh gas duct furnace to a 1 000 Btu cu ft 0 29 kW natural gas supply 200 000 Btu cu ft 1 000 Btu cu ft 200 cu ft hr Using Table I MR 1 a 1 pipe is needed Before making any connections to existing line suppling other gas appli ances contact the local gas company to make sure existing line is adequate size to handle the combined load Gas Pipe Installation Procedure 1 Install the gas piping in accordance with applicable local codes 2 Check gas supply pressure Each gas heater must be c
127. ure setpoint cooling and heating enable disable unoccupied economizer enable disable economizer minimum position unit priority shutdown Generic BAS Option GBAS Binary inputs demand limit contacts Binary outputs dirty filter relay refrigeration fail relay heat fail relay supply fan fail relay active diagnostics Analog inputs occupied zone cooling setpoint occupied zone heating setpoint unoccupied zone cooling setpoint unoccupied zone heating setpoint or minimum outside air flow setpoint supply air cooling setpoint supply air heating setpoint supply air static pressure setpoint Zone Humidity Options ECEM Analog inputs zone relative humidity Traq Damper Option VCM Analog inputs ventilation airflow Ventilation Override Module VOM Option Binary inputs VOM mode A unit off mode B pressurize VOM mode C exhaust VOM mode D purge VOM mode E purge Binary output VO relay FAXA SVX01B EN Standard IntelliPak Unit Control Fea tures The human interface panel is easy to read and requires less time for building maintenance personnel to learn to interact with the unit It features a clear language display in English Spanish or French that shows all of the Packaged Fresh Air unit control parameters including system on off demand limiting type night setback setpoints and many other setpoints All adjustments are done throug
128. vdc occupied unoccupied output energized VO relay energized exhaust fan field installed on exhaust damper field installed open Note Each system cooling exhaust supply air etc within the unit can be redefined in the field for each of the five sequences if required Also the defini tions of any or all of the five sequences may be locked into the software by simple key strokes at the human inter face panel Generic Building Automation System Module GBAS Option The generic building automation system module GBAS provides broad control capabilities for building automation systems other than a Tracer Summit system Use a field provided potentiometer or a 0 5 vdc signal to any of the GBAS inputs to access the following inputs and outputs listed in the paragraphs below GBAS analog inputs These four analog inputs can be configured to any of the following 1 occupied zone cooling 2 unoccupied zone cooling 3 uccupied zone heating 4 unoccupied zone heating b SA cooling setpoint 6 SA heating setpoint 7 space static pressure setpoint 8 SA static pressure setpoint GBAS binary outputs Each of the five 5 relay outputs can be mapped to any all of the available diagnostics Demand limiting binary input This function is operational on units with a GBAS and reduces electrical consumption at peak load times There are two types of demand limiting 5096 and 100 When demand limiting is
129. wheel removal of INLET HOOD condenser airflow FAXA SVX01B EN Roof Curb You must install the roof curb before beginning unit installation Reference the Roof Curb Installation Manual FAXA SVN01B EN for complete installation instructions For reference installation instructions are provided below Reference roof curb dimensions in the Dimensions and Weights section on pages 15 32 Note Do not tighten any of the screws used to assemble this section until the curb has been leveled and squared in its installed location Roof Curb and Ductwork Ensure the unit curb encloses the entire unit base area It is referred to as a full perimeter type curb Fabricate and install the supply air and return air ductwork adjoining the roof curb before the unit is set into place Note electrical stub ups within the curb General Set the roof curb and Packaged Fresh Air unit level to ensure proper operation If providing a field fabricated roof curb see page 12 for roof curb details for units without the total energy wheel option See page 13 for units with the total energy wheel option All installations must conform with local building codes or in the absence of local codes with the National Fuel Gas Code ANSI Z223 1 Note Trane has a roof curb specifically designed for the Packaged Fresh Air unit available in the following options 14 or 24 height and an acoustic curb To install it ref
130. y represents a significantly higher outdoor air enthalpy than the design dry bulb condition Use the condition that represents the highest enthalpy as the entering evaporator selection condition Evaporator Design Leaving Conditions Due to the uncertainty of the local terminal unit s latent capacity at part load it is usually most straightforward to size the FAU to handle the entire latent load on the system both indoor and outdoor With this design approach the terminal units may do some latent cooling dehumidification during periods of higher sensible load At these times the space will run slightly drier than the design RH limit This is why it makes sense to select the FAU to limit the space RH to a maximum allowable level for those conditions when the terminal units are providing no space latent cooling ASHRAE Standards 62 1 and 55 recommend using 6096 RH design limit for comfort cooling Using lower design limits may result in an unnecessary increase in system operating energy use 63 e TRANE Air to Air Energy Recovery Energy recovery can significantly reduce HVAC system first cost and operating energy costs You can use recovered energy for two purposes 1 to temper or reheat supply air for independent control of sensible and latent capacity or 2 to precondition outdoor air as it enters the building for ventilation The Packaged FAU offers refrigerant heat recovery for reheating the supply air To preco
131. y Control of Unoccupied Economizer Operation An optional comparative enthalpy system controls the economizer operation and measures the temperature and humidity of both return air and outside air to determine which source has lower enthalpy This system allows true comparison of outdoor air and return air enthalpy by measurement of outdoor and return air temperature and humidity The comparative enthalpy option should always be ordered with a return air damper Note If the unit does not have compara tive enthalpy the Packaged Fresh Air unit compares outdoor air enthalpy with a fixed reference enthalpy set through the human interface panel If ordering the reference enthalpy option you should also order a return air damper Also either supply air dehumidification with zone RH reference or zone dehumidifica tion with OA RH reference must be ordered to utilize either comparative enthalpy or reference enthalpy control Emergency Stop Input A binary input is provided on the unit s RTM module board for installation of a field provided switch or contacts to immediately shutdown all unit functions Total Energy Wheel with Occupancy Control The optional total energy wheel recovers energy from the exhaust airstream and preconditions the outdoor air The total energy wheel enables when the unit is in occupied mode and the exhaust fan is running The wheel disables during unoccupied mode or any time that the exhaust fan is not runn
132. y air reheat setpoint Supply air reheat reset functions will be active and reset based on unoccupied zone setpoints Exhaust fan operation control will be cycled off during unoccu pied modes unless unoccupied econo mizer operations are active Cooling Mode During unoccupied cooling mode the fan economizer and mechanical cooling cycle to control zone temperature Economizer functions will be enabled when the difference in the enthalpy of the OA and zone is adequate Mechanical cooling will supplement economizer capacity as required Heating Mode During unoccupied heating mode fan and heating capacity are cycled to maintain the unoccupied zone heating setpoint 65 e TRANE Zone Dehumidification Unit Sequence of Operation 1 Occupied Sequence During occupied mode the primary function of the unit is to provide ventilation air to the space Upon entering the occupied mode the outside air damper is opened and the supply air fan will start Drying Mode The unit enters the drying mode when the zone relative humidity exceeds the zone relative humidity setpoint RH In the drying mode the capacity is controlled to meet the default supply air drying setpoint dewpoint The SA drying setpoint can be reset down based on zone relative humidity conditions Drying functions have priority over cooling mode Upon entering drying mode the first compressor stages up While in drying mode the first compressor stage alwa
133. ys remains active This allows condenser reheat option if ordered to be available as required during the drying operation Additional compressors will sequence to match unit capacity to the latent load Reheat is controlled to meet a supply air reheat setpoint that is a minimum of 3 F greater than the supply air drying setpoint The supply air reheat setpoint can be reset up based on OA or zone temperature conditions When available condenser reheat will cycle to achieve a time weighted average of the reheat setpoint If primary heat reheat is user enabled additional reheat capacity is made available to match the sensible load Drying mode stops when the zone relative humidity falls below the operator adjustable setpoint for leaving drying mode Cooling Sequence When not in drying mode the unit stages cooling capacity to maintain the supply air cooling setpoint The supply air cooling setpoint can be reset down based on HI selectable parameters OA sensor zone sensor if installed 66 Operation Heating Sequence When not in drying mode the unit will stage heating capacity to maintain the supply air heating setpoint The supply air heating setpoint can be reset up based on HI selectable parameters OA sensor zone sensor if installed The supply air heating setpoint must be lower than the supply air cooling setpoint 2 Unoccupied Sequence In unoccupied mode the fan is stopped and the OA damper is closed

Trane Indirect Fired Make-Up Air Installation and Maintenance Manual

Contents

Download Pdf Manuals

Related Search

Related Contents