NRL free-cooling 2000-3600
Contents
1. 12 OPERATING LIMITS 2 1 13 DESIGN 5 5 00000 13 CORRECTION 5 eee seen azz ni zionione 14 INPUT POWER AND COOLING CAPACITY HIGFUEFFICIENCY VERSION aactor tn 14 Aermec cod 4086985 00 02 2013 10 2 10 3 11 11 1 11 2 12 12 1 12 2 13 13 1 13 2 14 14 1 15 16 17 18 19 19 1 192 19 3 19 4 19 5 19 6 FOR AT DIFFERENT FROM THE RATED 14 FOULING FACTORS 14 FREE COOLING FUNCTIONING CORRECTIVE FACTORS FOR AT DIFFERENT FROM THE RATED VALUE FOULING FACTORS TOTAL PRESSURE 5 1 2 CHILLER FUNCTION PRESSURE DROP FREE COOLING FUNCTION PRESSURE DROP USEFUL HEADS esent tnn tnn CHILLER FUNCTION USEFUL HEADS FREE COOLING FUNCTION USEFUL HEADS ETHYLENE GLYCOL SOLUTIONS HOW TO INTERPRET GLYCOL CURVES EXPANSION TANK CALIBRATION eren 19 MINIMUM WATER 19 Gier i M 20 SOUND 21 CONTROL AND SAFETY PARAMETERS CALIBRATION COMPRESSOR THERMOMAGNETIC 460V 3 60HZ COMPRESSOR THERMOMAGNETIC 575V 3 60HZ PUMP THERMOMAGNETIC 03 P3 PUMP THERMOMAGNETIC2. a 5 o o o o o O O oO O o o o o DN 1D S O vc c cC c A gpm 8 RE B Bg 9 8 4 a e i N co o Water flow rate Average water temperature F C 41 5 50 10 59 15 68 20 86 30 104 40 122 50 Coefficients 0 91 12 2 FREE COOLING FUNCTION PRESSURE DROP Inlet temperature 59 00 F 15 C psi kPa Outlet temperature 51 64 F 11 C 60 91 420 Outside air temperature 35 60 F 2 C 5801 400 6 5511 4 380 NRL 2000 P 52 21 4 360 Average water temperature 50 F 10 C a s40 4 5 7 O 46 414 320 1 23 2 NRL 2250 For temperatures other than 50 F 10 C to use the 43 51 4 table of correction factors a 20517 089 3 NRL 2500 o 3771 260 348 240 3191 4 220 2 NRL 2800 2901 200 26114 180 NRL 3000 23914 160 2031 4 140 NRL 3300 1740 120 1450 4 100 1 604 7 NRL 3600 870 4 60 5 80 4 40 290 4 20 0 0 Vh O o o o o o o o o o o e iD N o N Oo S Cal lt eu MTM e 9 oe gf 4 10 o N co o Water flow rate A
3. 8 o 9 N thermostatic valve gt X thermostatic valve Processed water temperature Low pressure side side Acceptable maximum pressure bar PSI 45 653 30 435 Acceptable maximum temperature 120 257 51 131 Acceptable minimum temperature C F 30 22 30 22 WATER SIDE Acceptable maximum pressure Hydarulic circuit safety valve only in version with storage tank or with pump Calibrated at 6 87 bar PSI and with piped discharge which intervents by discharging overpressure if abnormal work pressure occur ATTENTION Contact our technical sales de partment if the unit needs to opera ted outside the operating limits Note 1 In summer mode the unit can be started with external air 46 C 114 8 F and water inlet 35 C 95 F In winter mode the unit can be star ted with external air 15 C 5 F and water Aermec cod 4086985_00 02 2013 inlet 20 C 68 F Operate in such conditions is permitted only for a short time and to bring the system up to temperature To reduce the time of this operation it is recommended to install a three way valve that allows bypassing water from the system utilities until the conditions that allow the unit to work within the permitted operation limits are achieved 13 10 CORRECTION FACTORS 10 1 INPUT POWER AND COOLING CAPA CITY HIGH EFFICIENCY VERSION The refrigerating
4. 1 t g ce 2 12 S o 7 9 MV 40 C 104 F E if 4 4 o 44 C 111 2 F t o 3 3 07 2 o T 0 05 o t 9 04 S 6 4 2 2 4 6 7 8 10 12 14 16 18 212 248 284 32 0 355 392 428 500 53 6 572 60 8 844 F Processed water temperature CORRECTION COEFHCIENTS OF THE INPUT POWER IN COOLING MODE O I lt g I 8 13 I I a 12 g o 5 9 as L 44 C 111 2 F pum E 5 35 C 95 F o soc ser 25 c 77F 5 20 C 68 F m z 3 9 os 1 2 5 I B 07 1 a I O 06 1 6 4 2 o 2 4 6 6 7 8 10 12 14 16 18 C 212 248 284 320 356 392 428 464 500 536 572 608 644 F 44 6 Processed water temperature AT DIFFFERENT FROM THE RATED VALUE AT 5 C 10 01 F 3 C 5 40 F 5 56 C 10 01 F 8 C 14 40 F 10 C 18 F The performance levels given by the technical data refer to conditions with clean tubes with a fouling factor 1 For other fouling factor values multiply the data of performance table by the coefficients given 14 Cooling capacity correction factors 0 99 1 1 02 1 03 Input power correction factors 0 99 1 1 01 1 02 FOULING FACTOR K M2 KW 0 1 Cooling capacity correction factors 0 967 In
5. operation with local or remote control Machine status display 1 2 alarms sumary ON OFF compressors Display of the following parameters CD sd pe co 9 po po water inlet temperature accumulator temperature water outlet temperature AT high pressure low pressure waiting time for restart alarms visualisation For further information refer to the user manual 6 ACCESSORIES 6 1 MECHANICAL ACCESSORIES AVX Group of anti vibration to be installed under the base GP Protection grille protects the external coil from accidental knocks 6 2 ELECTRICAL ACCESORIES AERWEB300 Accessory AERWEB allows remote control of a chiller through a common PC and an ethernet connection over a common browser 4 versions available AERWEB300 6 Web server to monitor and remote control max 6 units in RS485 network AERWEB300 18 Web server to monitor and remote control max 18 units in RS485 network COMPATIBILITY TABLE MOUNTS AVX NRL FC 2000 3600 60Hz on the compressor discharge pipe AERWEB300 6G Web server to monitor and remote control max 6 units RS485 network with integrated 485 GPRS modem RS 485 interface for supervision systems with AERWEB300 18G Web server to monitor and remote MODBUS protocol control max 18 units in RS485 network with integra ted GPRS modem FOR MORE INFORMATION PLEASE CONTACT US DRE It allows the reduction of peak power necessary fo
6. 20 Aermec cod 4086985 00 02 2013 NRL FC 2000 3600 60Hz 18 SOUND DATA Sound power Total sound levels Octave band Hz Aermec determines the sound power value on NRL Pow Pressure 125 250 500 1000 2000 4000 8000 the basis of measurements taken in accordance dB A ISB A dB A Sound power by central band frequency dB A with standard 9614 2 2000 93 61 73 85 9 82 4 85 6 86 9 84 3 80 1 69 9 Sound pressure 2250FA 94 62 74 86 6 86 8 87 2 88 4 86 1 80 6 69 1 Sound pressure in free field on a reflecting plane 2500FA 96 64 76 88 1 89 9 89 3 90 5 88 4 82 0 69 1 directional factor Q 2 in accordance with 97 65 17 90 9 87 4 88 8 93 0 Do 78 0 68 3 RANA 3000FA 97 65 77 91 9 86 4 88 8 91 0 86 2 78 5 69 9 3300FA 98 66 78 90 9 89 9 91 3 93 0 88 2 80 0 70 9 3600FA 98 66 78 89 9 90 4 91 3 93 5 87 2 78 0 69 9 2000FE 88 56 68 83 9 78 1 79 4 78 2 78 5 74 3 68 3 2250FE 89 57 69 83 7 81 5 80 5 81 6 80 7 74 7 66 9 2500FE 91 59 71 84 4 84 4 82 3 84 5 83 2 76 0 65 9 2800FE 92 60 72 87 9 80 4 83 3 85 5 80 2 71 0 62 9 3000FE 91 59 71 88 9 79 4 81 8 82 0 79 2 70 0 61 9 3300FE 92 60 72 88 9 81 4 82 3 86 0 84 2 74 0 66 9 3600FE 92 60 72 87 9 82 9 82 6 87 0 83 7 74 0 66 3 19 CONTROLAND SAFETY PARAMETERS CALIBRATION COOLING SET min Max default Water inlet temperature in cooling mode 10 C 14 F 20 C 68 F 7 C 44
7. CHILLER e EXTERNAL UNITS ERMEC air conditioning TECHNICAL MANUAL e HIGHT EFFICIENCY e POWER SUPPLY 60Hz AERMEC COMPANY QUALITY SYSTEM a ICIM ISO 9001 2000 Cert n 0128 5 Aa 1534 CERTIFIED Air an 2 NRL free cooling 2000 3600 4086985 00 NRL FC 2000 3600 60Hz Dear Customer Thank you for choosing AERMEC It is the fruit of many years of experience and special design studies and has been made of the highest grade materials and with cutting edge technology In addition all our products bear the EC mark indicating that they meet the requirements of the European Machine Directive regarding safety The standard of quality is permanently being monitored and AERMEC products are therefore a synonym for Safety Quality and Reliability The data may undergo modifications considered necessary for the improvement of the product at any time and without the obligation for any notice thereof Thank you again AERMEC S p A 1 DESCRIPTION AND CHOICE OF THE UNIT 11 FREE COOLING FUNCTIONING CORRECTIVE FACTORS 2 CHECK LIST 111 FOR AT DIFFERENT FROM THE RATED 3 PRINCIPLE OF OPERATION SCHEMES 11 2 FOULING FACTORS 3 1 PRODUCTION OF COLD WATER ONLY THE SYSTEM m 3 2 COLD WATER PRODUCTION AND THE SYSTEM RECOVERY 12 TOTAL PRESSURE DROPS DESUPERHEATER 12 1 CHILLER FUNCTION PRESSURE DROP
8. preventing the flow of refrigerant gas towards the evaporator SIGHT GLASS For checking the refrigerating gas load and any humidi ty in the refrigerating circuit TAPS Present in the liquid and discharge lines and allow to intercept the refrigerant in case of extraordinary maintenance 5 2 FRAME AND FANS LOAD BEARING STRUCTURE Structure made of hot dipped galvanised steel sheets painted with polyester powders built to guarantee easy accessibility for service and maintenance FAN UNIT Axial fans with IP 54 degree of protection external rotor helical blades housed in nozzles complete with accident prevention protective screen 6 pole electric motor with built in circuit breaker NRL FC 2000 3600 60Hz 5 3 HYDRAULIC COMPONENTS standard version AIR WATER HEAT EXCHANGER FREE COOLING Crossed by water for the free cooling function 15 made of copper pipes and aluminium blades blocked through the mechanical expansion of the pipes High efficiency type 3 WAY VALVE This is an electric servo controlled ON OFF diver ting valve on the water side of the freecooling circuit controlled WATER FILTER Allows you to block and eliminate any impurities in the hydraulic circuits Inside it has a filtering mesh with holes not greater than one millimetre It is essential for avoiding serious damage to the plate type exchanger FLOW SWITCH Controls that the water is circulating otherwise the unit blocks
9. 04 P4 FAN UNITS THERMOMAGNETIC 460V 3 60HZ pe FAN UNITS THERMOMAGNETIC 575V 3 60HZ Z 2 e oO aN zZ e Standards and directives to be followed in the design and manufacture of the unit STANDARD 1 UL 1995 Heating and cooling equipment NRL FC 2000 3600 60Hz ACOUSTIC PART 1 ISO DIS 9614 2 sound intensity method 2 ANSI Sstandard 70 National Electrical code N E C 3 CSA C 22 1 C 22 2 Safety Standard Electrical Installation REFRIGERANT GAS R410A SAFETY LEVEL 1 24 1 DESCRIPTION AND CHOICE OF THE UNIT The NRL Free cooling series appliances are water chillers equipped with an external air cooling capacity recovery system called free cooling The water free cooling system consists in integrating and eventually completely replacing the cooling capacity delivered by the compressors through an additional water coil that exploits the low temperature of the external air to cool the system s return water Therefore basically free chilled water can be obtained with this system for all installations where a continuos production is not required and the refore also with low external air temperatures e g industrial processes shopping centres hospitals and other civil applications Considerable energy saving can be achieved with this type of solution when the return flow of the system is 35 6 F 2 C below the external air temperature
10. 12 2 FREE COOLING FUNCTION PRESSURE DROP 4 CONFIGURATOR 13 USEFUL HEADS 131 CHILLER FUNCTION USEFUL HEADS 13 2 FREE COOLING FUNCTION USEFUL HEADS 5 DESCRIPTION OF THE COMPONENTS 5 1 CHILLER CIRCUIT 5 2 FRAME AND FANS 5 3 HYDRAULIC COMPONENTS STANDARD VERSION 14 ETHYLENE GLYCOL 5 5 0 18 5 4 HYDRAULIC COMPONENTS CONFIGURABLE VERSION 1411 HOW TO INTERPRET GLYCOL CURVES 18 5 5 SAFETY AND CONTROL COMPONENTS m 5 6 ELECTRICAL COMPONENTS 9 15 EXPANSION TANK CALIBRATION eere 19 6 ACCESSORIES 16 MINIMUM WATER 2 4 4 4 4 19 6 1 MECHANICAL ACCESSORIES 10 6 2 ELECTRICAL ACCESSORIES 17 PART 20 7 TECHNICAL DATA VERS CHILLER FUNCTION 11 18 SOUND 21 8 TECHNICAL DATA VERS FREE COOLING MODE 12 19 CONTROL AND SAFETY PARAMETERS CALIBRATION 19 1 COMPRESSOR THERMOMAGNETIC ALL VERSIONS OPERATING LIMITS 1 1 02 2 1 2 1 nnnnnnnnnnnn 13 19 2 PUMP THERMOMAGNETIC 03 04 P3 P4 9 1 DESIGN SPECIFICATIONS iene 13 19 3 FAN UNITS THERMOMAGNETIC ALL VERSIONS 10 CORRECT
11. AIR VENT Of the automatic type assembled on the upper part of the hydraulic system it releases any air bubbles that may be present in the system 5 4 HYDRAULIC COMPONENTS configurable version DRAIN VALVE Of the automatic type assembled on the upper part of the hydraulic system it releases any air bubbles that may be present in the system CIRCULATION PUMPS HIGH PUMP Depending on the characteristics of the pump chosen it offers a useful head to overcome the pressure drops in the system EXPANSION TANK Of the membrane type with nitrogen pre charge SAFETY VALVE Calibrated to 87psi 6bar and with ductable discharge it releases overpressure in the event of abnormal working pressure levels STORAGE TANK In stainless steel with a 185gal 7001 capacity In order to reduce the thermal dispersion and eliminate the phenomenon of the formation of condensation it is insulated with polyurethane material of a suitable thickness One antifreeze electric heater of 300W down to 4 F 20 C outside temperature and tank water temperature 41 F 5 C assembled as standard and commanded from the card via an antifreeze sensor inserted in the tank Aermec cod 4086985_00 02 2013 NRL FC 2000 3600 60Hz PH 6 8 Electric less than 200 mV conductivity em 25 Chloride ions less than 50 ppm Sulphuric acid iors less than 50 ppm Total iron less than 0 3 ppm Alkalinity M l
12. Safety valve yes yes yes yes yes yes yes Air vent yes yes yes yes yes yes yes Pump yes yes yes yes yes yes yes Expansion tank yes yes yes yes yes yes yes Storage tank yes yes yes yes yes yes yes Aermec cod 4086985_00 02 2013 NRL FC 2000 3600 60Hz 3 PRINCIPLE OF OPERATION SCHEMES 3 1 PRODUCTION OF COLD WATER ONLY THE SYSTEM Description Operation exchanger EVAPORATION SYSTEM SIDE Production cold water exchanger CONDENSATION SOURCE SIDE Heat exchange with the air exchanger EVAPORATION FREE COOLING SYSTEM SIDE Production cold water Sign Description cP compressor CN Air side exchange TEV Thermostatic valve BHE Exchanger plate three way valve a H O RETURN SYSTEM 0 DISCHARGE SYSTEM Aermec cod 4086985_00 02 2013 5 3 2 COLD WATER PRODUCTION AND THE SYSTEM RECOVERY DESUPERHEATER NRL FC 2000 3600 60Hz BHE H O SUPPLY C gt DISCHARGE Description Operation exchanger EVAPORATION SYSTEM SIDE Production of cold water exchanger CONDENSATION SOURCE SIDE Heat exchange with the air exchanger EVAPORATION FREE COOLING SYSTEM SIDE Production cold water CONDENSATION DESUPERHEATER hot water after heating Swim ming pools Sign Description CP Compressor CN Air side exch
13. 3 50 ad 15 5 10 14 2 50 5 C 23 F S 2 00 ac s2F 8 2 C 35 6 F E clave 2 150 5 C 41 F 10 C 50 F C 1 00 a 0 50 8 0 00 10 8 6 4 2 2 4 6 8 10 12 441546 18 20 22 24 26 28 14 176 212 248 284 356 392 428 464 50 536 572 59 608 644 68 716 752 788 824 F Temperature of the system return water AT DIFFFERENT FROM THE RATED VALUE AT 5 C 10 01 F 3 C 5 40 F 5 56 C 10 01 F 8 14 40 F 10 C 18 F Cooling capacity correction factors 0 99 1 1 02 1 03 Input power correction factors 0 99 1 1 01 1 02 FOULING FACTOR K M2 KW 0 1 Cooling capacity correction factors 0 967 Input power correction factors 15 NRL FC 2000 3600 60Hz 12 TOTAL PRESSURE DROPS 12 1 CHILLER FUNCTION PRESSURE DROP Inlet temperature 53 6 F 12 C 4 Li Outlet temperature 44 6 F 7 C i Outside air temperature 95 F 35 C 43 514 300 40 614 280 1 NRL 2000 Average water temperature 50 F 10 C 37714 260 34 814 240 2 NRL 2250 For temperatures other than 50 F 10 C to use the 2 31 91 4 220 NRL 2500 table of correction factors 5 29014 200 I 2611 4 180 2 NRL 2800 2 23 21 160 amp 20314 140 6 NRL 3000 17404 120 NRL 3300 14 504 100 11804 80 7 NRL 3600 8 70 60 5 80 40 2 90 20 0 0 Wh oO
14. 4 4 4 Minimum water conten I KW 2 8 8 8 8 8 8 8 KEY 1 minimum water content in cooling mode 2 minimum water content in the case of applications in process or operation at low outdoor temperatures ATTENTION It is recommended to design systems with high water content minimum recommended values shown in table to limit 1 The hourly number of inversions between functioning modes 2 Decrease in water temperature during winter defrost cycles Aermec cod 4086985_00 02 2013 19 NRL FC 2000 3600 60Hz 17 PARTLOAD COOLING AHRI CONDITIONS Inlet temperature 53 60 F 12 C Outlet temperature 44 6 F 7 C At 10 01 F 5 56 C External temperature 95 F 35 C LEVELS OF POWER COOLING CAPACITY 19 29 32 49 59 62 72 82 99 10 112 129 2000 12 25 37 50 62 75 87 100 2250 14 25 39 50 64 75 89 100 2500 12 25 37 50 62 75 87 100 2800 12 23 33 44 53 63 72 82 91 100 3000 9 17 25 34 42 50 58 67 75 84 92 100 3300 10 19 28 37 46 55 63 71 78 86 93 100 3600 9 17 25 34 42 50 58 67 75 84 92 100 POWER IMPUT 12 9 39 9 59 2 72 9 99 109 119 129 2000 11 21 32 44 57 71 85 100 2250 12 21 34 44 59 71 87 100 2500 11 21 32 44 57 71 85 100 2800 9 18 27 37 46 56 66 77 88 100 3000 6 12 19 26 33 41 50 59 69 79 89 100 3300 7 14 16 29 37 46 54 63 72 81 90 100 3600 6 12 19 26 33 41 50 59 69 79 89 100
15. 6 C ANTI FREEZE INTERVENTION min Max default Anti freeze alarm intervention temperature on EV side 15 C 5 F 4 C 39 2 F 3 C 37 4 F TOTAL DIFFERENTIAL min Max default Proportional temperature band within which the compressors are activated and deactivated 3 C 5 4 10 C 10 5 C 18 2000 2250 2500 2800 3000 3300 3600 HIGH PRESSURE SWITCH WITH MANUAL RESET PA psi bar 580 15 40 580 15 40 580 15 40 580 15 40 580 15 40 580 15 40 580 15 40 HIGH PRESSURE TRANSDUCER TAP psi bar 725 19 50 725 19 50 725 19 50 725 19 50 725 19 50 725 19 50 725 19 50 LOW PRESSURE TRANSDUCER TBP psi bar 435 11 30 435 11 30 435 11 30 435 11 30 435 11 30 435 11 30 435 11 30 CHILLER CIRCUIT SAFETY VALVE AP psi bar 652 67 45 652 67 45 652 67 45 652 67 45 652 67 45 652 67 45 652 67 45 Aermec cod 4086985_00 02 2013 21 NRL FC 2000 3600 60Hz 19 1 COMPRESSOR THERMOMAGNETIC 460V 3 60HZ COMPRESSOR inn Circuit 2000 2250 2500 2800 3000 3300 3600 MTC1 A 40 5 40 5 51 5 51 5 40 5 40 5 51 5 MTC1A A 1 40 5 40 5 51 5 51 5 40 5 40 5 51 5 MTC1B A 40 5 40 5 51 5 MTC2 A 40 5 40 5 51 5 40 5 40 5 51 5 51 5 MTC2A A 2 40 5 40 5 51 5 40 5 40 5 51 5 51 5 MTC2C A m m E 40 5 40 5 51 5 51 5 MTC3 A 40 5 51 5 51 5 51 5 40 5 40 5 51 5 MTC3A A 3 40 5 51 5 51 5 51 5 40 5 40 5 51 5 MTC3B A 40 5 40 5 51 5 MTCA A 40 5 51 5 51 5 40 5 40 5 51 5 51 5 MTC4A A 4 40 5 51 5 51 5 40 5
16. 7 NRL 3600 725 50 0 o e N co D a Q Te 1 gpm cu to st co a st co Qu to N Cu te O Si a a al m e so NI E co Aermec cod 4086985 00 02 2013 Water flow rate 17 NRL FC 2000 3600 60Hz 14 ETHYLENE GLYCOL SOLUTIONS The correction factors of cooling power and input power take into account the presence of glycol and diverse evaporation temperatures The pressure drop correction factor considers the different flow rate resulting from the application of the water flow rate correction factor The water flow rate correction factor is calculated to keep the same At that would be present with the absence of glycol NOTE On the following page an example is given to help graph reading Using the diagram below it is possible to determine the percentage of glycol required this percenta ge can be calculated by taking of the following factors into consideration one Depending on which fluid is considered water or air the graph is interpreted by the right or left side at the crossing point on the curves with the external temperature line or the water produced line A point from which the vertical line will pass is obtained and this will distingui
17. 7 3 7 3 7 3 7 MTV2B A s pa 3 7 3 7 3 7 3 7 3 7 MTV2C A 3 7 3 7 MTV3 A 3 7 3 7 3 7 3 7 3 7 3 7 3 7 MTV3A A 3 7 3 7 3 7 3 7 3 7 3 7 3 7 MTV3B A gt 3 7 3 7 3 7 3 7 3 7 3 7 MTV3C A gt 3 7 3 7 MTV4 A 3 7 3 7 3 7 3 7 3 7 3 7 3 7 MTV4A A 3 7 3 7 3 7 3 7 3 7 3 7 3 7 MTV4B A n 3 7 3 7 3 7 3 7 3 7 3 7 MTVAC A 3 7 3 7 23 AE MEC AERMEC S p A 37040 Bevilacqua VR Italy Via Roma 996 Tel 39 0442 633111 _ Telefax 0442 93730 39 0442 93566 eee la prima per il clima www aermec com info aermec com dati tecnici riportati sulla seguente documentazione non sono impegnativi si riserva la facolt di apportare in qualsiasi momento tutte le modifiche ritenute necessarie per il miglioramento del prodotto
18. 9 7 132 132 132 MAS A 575V 3 60Hz 5 8 73 5 8 5 8 10 6 10 6 10 6 A 460V 3 60Hz 72 9 7 9 7 9 7 132 132 132 575V 3 60Hz 5 8 7 7 5 8 5 8 10 6 10 6 10 6 22 Aermec cod 4086985 00 02 2013 NRL FC 2000 3600 60Hz 19 5 FAN UNITS THERMOMAGNETIC 460V 3 60HZ Aermec cod 4086985_00 02 2013 COMPRESSOR wa at Circuit 2000 2250 2500 2800 3000 3300 3600 MTV1 A 4 2 4 2 4 2 4 2 4 2 4 2 4 2 MTV1A A 4 2 4 2 4 2 4 2 4 2 4 2 4 2 MTV1B A a gt 4 2 4 2 4 2 4 2 4 2 MTV1C A 42 4 2 MTV2 A 4 2 4 2 4 2 4 2 4 2 4 2 4 2 MTV2A A 4 2 4 2 4 2 4 2 4 2 4 2 4 2 MTV2B A 3 4 2 4 2 4 2 4 2 4 2 MTV2C A 42 4 2 MTV3 A 4 2 4 2 4 2 4 2 4 2 4 2 4 2 MTV3A A 4 2 4 2 4 2 4 2 4 2 4 2 4 2 MTV3B A o 42 42 42 42 42 42 MTV3C A 42 4 2 MTV4 A 4 2 4 2 4 2 4 2 4 2 4 2 4 2 MTV4A A 4 2 4 2 4 2 4 2 4 2 4 2 4 2 MTV4B A a 42 42 42 42 4 2 4 2 MTVAC A B 4 2 4 2 19 6 FAN UNITS THERMOMAGNETIC 575V 3 60HZ COMPRESSOR um CARE Circuit 2000 2250 2500 2800 3000 3300 3600 MTV1 A 3 7 3 7 3 7 3 7 3 7 3 7 3 7 MTV1A A 3 7 3 7 3 7 3 7 3 7 3 7 3 7 MTV1B A 3 7 3 7 3 7 3 7 3 7 MTVIC A m 3 7 3 7 MTV2 A 3 7 3 7 3 7 3 7 3 7 3 7 3 7 2 3 7 3 7 3 7 3
19. L R A M C A Recom fuse SCROLL COMPRESSORS gt gt gt gt gt gt gt gt Quantity circuits HEAT EXCHANGER SYSTEM SIDE n n 8 4 8 4 8 4 8 4 8 4 10 4 12 4 Exchanger capacity Water connections BUFFER TANK HYDRONIC GROUP SYSTEM SIDE Buffer tank capacity Electrical heater EXPANSION TANK Expansion tank Expansion tank calibration HIGH HEAD PUMP Pump power input Pump input current COOLING AHRI STANDARD CONDITIONS Outlet water temperature 6 7 C 44 6 F Flow rate 0 0431 5 per kW External temperature 35 C 95 F Aermec cod 4086985_00 02 2013 AHRI conditions leaving water 6 7 C 44 6 F flow rate 0 0431 5 per kW full load Load 100 air 35 C 95 F Load 75 air 26 7 C 80 06 F Load 50 air 18 3 C 64 94 F Load 25 air 12 8 C 55 04 F 0 data refered to no pump version water connections 3 for module 1000 4 for module 1250 11 TECHNICAL VERSION F NRL FC 2000 3600 60Hz 2000 2250 2500 2800 3000 3300 3600 SAFETY VALVE Safety valve calibration FAN MOTORS Quantity 8 12 12 16 Air flow 117716 140788 137492 137492 186932 186932 317600 30 4 38 0 45 6 45 6 45 6 60 8 60 8 26 6 33 2 39 8 39 8 39 8 53 1 53 1 16 0 20 0 24 0 24 0 24 0 32 0 32 0 17 4 21 8 26 2 26 2 26 2 34 9 34 9 AL VER
20. a three way valve diverts the water into the free cooling coil to be pre cooled after which it is sent to the evaporator where it is taken to the desired temperature The NRL free cooling units are comprised of two R410A refrigerating cir cuits and one water circuit that by means of a three wayvalve can activate the free cooling water coil positioned in series with the plate evaporator The water circuit may or may not be supplied with an accumulator as sembly Thanks to several scroll type compressors and the fan speed control by means of the speed regulator the NRL chillers can obtain various cooling capacity levels both in the compressors only mode as well as the free cooling mode partial or total The electronic adjustment with optimised microprocessor for free cooling controls and manages all the unit components and operating parameters an internal memory registers the operating condition as soon as an alarm arises and subsequently displays it OPERATING MODE FREE COOLING ONLY when the external temperature is sufficiently low to allow water cooling inside the free cooling coils at the desired temperature This is the most economical mode of the unit with only the fans operating in speed modulation MIXED FREE COOLING COMPRESSORS the compressors operate in integration with the free cooling when the cooling capacity recovered from the external air is no longer sufficient for the power required by the system The higher th
21. capacity yielded and the input electrical capacity in conditions other than rated conditions are obtained by multiplying the rated va lues Pf Pa by the respective correction coefficients Cf Ca The following diagrams allow you to obtain the correction coefficients to be used for the various versions of the devices in cold mode next to each curve you can see the outside air temperature to which it refers KEY Cf correction coefficient of the cooling capacity Ca correction coefficient of the input power ATTENZIONE FOR At DIFFERENT FROM 10 01 F 5 56 C Tab 9 2 is used for the correction factors of the cooling capacity and input power of the water consum ption To take into account the soiling of the exchanger apply the relative fouling factors Tab 9 3 10 2 FOR At DIFFERENT FROM THE RATED VALUE The performances given by the technical data refer to AHRI standard conditions flow rate 0 0431 5 per kW At 10 01 F 5 56 C Use table to obtain the corrective factors of the cooling capacity and input power different than At 10 01 F 5 56 C 10 3 FOULING FACTORS NRL FC 2000 3600 60Hz CORRECTION COEFHCIENTS OF THE COOLING CAPACITY 4 O I 20 C 68 F 1 5 25 C 77 F 2 1 30 C 86 F I3 35 C 95 F
22. 40 5 51 5 51 5 MTC4B A m m m 40 5 40 5 51 5 51 5 19 2 COMPRESSOR THERMOMAGNETIC 575V 3 60HZ COMPRESSOR um Milites Circuit 2000 2250 2500 2800 3000 3300 3600 MTC1 A 32 3 32 3 41 7 41 7 32 3 32 3 41 7 MTC1A A 1 32 3 32 3 41 7 41 7 32 3 32 3 41 7 MTC1B A 32 3 32 3 41 7 MTC2 A 32 3 32 3 41 7 32 3 32 3 41 7 41 7 MTC2A A 2 32 3 32 3 41 7 32 3 32 3 41 7 41 7 MTC2C A 32 3 32 3 41 7 41 7 MTC3 A 32 3 41 7 41 7 41 7 32 3 32 3 41 7 MTC3A A 3 32 3 41 7 41 7 41 7 32 3 32 3 41 7 MTC3B A 32 3 32 3 41 7 MTCA A 32 3 41 7 41 7 32 3 32 3 41 7 41 7 MTC4A A 4 32 3 41 7 41 7 32 3 32 3 41 7 41 7 MTC4B A B 32 3 32 3 41 7 41 7 19 3 PUMP THERMOMAGNETIC 03 P3 Power supply 2000 2250 2500 2800 3000 3300 3600 THERMOMAGNETIC A 460V 3 60Hz 7 2 7 2 97 9 7 13 2 13 2 13 2 575V 3 60Hz 5 8 5 8 5 8 5 8 10 6 10 6 10 6 A 460V 3 60Hz 7 2 9 4 97 9 7 13 2 132 13 2 Mpa A 575V 3 60Hz 5 8 7 7 5 8 5 8 10 6 10 6 10 6 19 4 PUMP THERMOMAGNETIC 04 4 Power supply 2000 2250 2500 2800 3000 3300 3600 THERMOMAGNETIC A 460V 3 60Hz 7 2 7 2 9 7 9 7 13 2 132 132 MEE A 575V 3 60Hz 5 8 5 8 5 8 5 8 10 6 10 6 10 6 A 460V 3 60Hz 72 72 9 7 9 7 132 132 132 A 575V 3 60Hz 5 8 5 8 5 8 5 8 10 6 10 6 10 6 A 460V 3 60Hz 72 9 7 9 7
23. ION 5 2 1 1 14 10 1 INPUT POWER AND COOLING CAPACITY HIGH EFFICIENCY VERSION iieri 10 2 FOR AT DIFFERENT FROM THE RATED VALUE 10 3 FOULING FACTORS AERMEC S p A reserves the right at all times to make any modification for the improvement of its product and is not obliged to add these modification to machines of previous manufacture that have already been delivered or are being built Aermec cod 4086985_00 02 2013 NRL FC 2000 3600 60Hz 3 1 3 2 5 1 5 2 5 3 5 4 5 5 5 6 6 1 6 2 10 10 1 DESCRIPTION AND CHOICE OF THE 4 CHECK LIST PRINCIPLE OF OPERATION SCHEMES PRODUCTION OF COLD WATER ONLY THE SYSTEM COLD WATER PRODUCTION AND THE SYSTEM RECOVERY DESUPERHEATER 3i teet eden 6 CONFIGURATOR 1 21 1 nnne nnn 7 DESCRIPTION OF THE 5 4 8 CHILLER CIRCUIT FRAME AND FANS HYDRAULIC COMPONENTS STANDARD VERSION HYDRAULIC COMPONENTS CONFIGURABLE VERSION SAFETY AND CONTROL COMPONENTS ELECTRICAL COMPONENTS 9 ACCESSORIES MECHANICAL ACCESSORIES ELECTRICAL 55 TECHNICAL DATA VERS CHILLER FUNCTION _ 11 TECHNICAL DATA VERS FREE COOLING MODE
24. SION F Fan input current Fan power input SOUND DATA Sound pressure Sound power CHARGE The data reported can be changed at any time if deemed necessary from Aermec R410A Gas refrigerant C1 C2 C3 C4 Ibs 77 2 71 2 77 2 77 2 77 2 77 2 99 2 103 6 992 47 992 1036 99 2 103 6 99 2 103 6 105 8 105 8 105 8 105 8 1455 1543 1455 1543 141 1 141 1 141 1 141 1 Oil C1 C2 C3 C4 154 154 154 154 154 154 154 154 154 154 154 154 154 165 154 165 165 165 165 165 165 165 165 165 165 165 165 165 DIMENSION Height Width Depth Weight when empty COOLING AHRI STANDARD CONDITIONS Outlet water temperature 6 7 C 44 6 F AHRI conditions leaving water 6 7 C 44 6 F Flow rate 0 0431 5 per kW flow rate 0 0431 5 per kW full load External temperature 35 C 95 F Load 100 air 35 C 95 F Load 75 air 26 7 C 80 06 F Load 50 air 18 3 C 64 94 F Load 25 air 12 8 C 55 04 F 8 TECHNICAL DATA vers F FREE COOLING MODE Model 2000 2250 2500 2800 3000 3300 3600 Cooling capacity Total power input Total power input with HIGH PUMP Water flow rate Total pressure drop Useful head with HIGH PUMP ENERGY INDICES EER BTU Wat 58 80 50 66 45 15 50 50 58 90 51 27 58 21 PROTECTION RATING IP 24 24 24 24 24 24 24 ELECTRICAL DATA Total input current 0 SOUND DATA Sound pr
25. ange TEV Thermostatic valve BHE Exchanger plate V3V three way valve a H O RETURN SYSTEM H O SUPPLY gt SYSTEM Aermec cod 4086985_00 02 2013 NRL FC 2000 3600 60Hz 4 CONFIGURATOR 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 NRL 200 0 F 5 6 00 field 1 2 3 Code NRL 4 5 6 Size 200 225 250 280 300 330 360 7 Compressors 0 Standard compressor 8 Thermostatic valve Standard mechanical thermostatic valve with produced water up to 39 2 F 4 C 0 Y Mechanical thermostatic valve with produced water from 39 2 F 4 C to 42 8 F 6 C 0 X Electronic thermostatic valve with produced water up to 39 2 F 4 9 9 Model F Free cooling 10 Heat recovery Without recovery units Desuperheater 11 Version A High efficiency High efficiency silenced version 12 Coils i Made of aluminium R Made of copper 5 Tinned copper Painted aluminium epoxy paint 13 Ventilation I Fan speed modulating for condensation control 14 Power supply 6 230V 3 60Hz with thermomagnetic switches 2 7 460V 3 60Hz with thermomagnetic switches 8 575V 3 60Hz with thermomagnetic switches 15 16 Hydronic kit 00 Without water storage 03 Water storage tank and high head single pump 04 Water storage tank with high head pump and reserve pump P3 Without water storage tank with high head pump P4 Without water storage tank with high head pump and reserve pump For lower te
26. av temp 9 5 C 49 1 F Correction factor of flow rates cond av temp 47 5 C 117 5 F NOTE A Although the graph arrives at external air temperatures of 40 C 104 F unit opera tional limits must be considered Aermec cod 4086985_00 02 2013 NRL FC 2000 3600 60Hz 15 EXPANSION TANK CALIBRATION Hmaxu 180 454 55m The standard pressure value for pre charging the expansion tank is 1 5 bar and the volume is 25 litres Maximum value 6 bar The tank must be calibrated according to the maximum difference e in height H of the device see figure according to the formula S p calibration bar m 10 2 0 3 I For example if the level difference H is 20m the calibration value of the tank will be 2 3 bar at DI Ifthe calibration value obtained from the calculation is lower than 1 5 bar i e for H lt 12 25 maintain the standard calibration T H 40 19ft 12 25m KEY 1 Check that the highest user does not exceed a level diffe 5 rence of 180 45ft n 2 Check that the lowest user can sustain the global pressu Le re acting at that point ar H 0m 3 n a Huno 16 MINIMUM WATER CONTENT NRL 2000 2250 2500 2800 3000 3300 3600 Number of compressor circuits n n 8 4 8 4 8 4 10 4 12 4 12 4 12 4 m kw 4 4 4 4
27. e cooling capacity recovery with free cooling the lower the integration is COMPRESSORS ONLY when the external air temperature is greater than the return temperature of the system water Versions available COOLING ONLY A E maximum permissible external temperature 114 8 F 46 C processed water temperature 64 4 F 18 C The units with desuperheater D are not available in the versions 1 YD 2 XD only for temperature lower than 39 2 F 4 C This unit contains fluorinated greenhouse gases covered by the Kyoto Protocol Maintenance and disposal operations must be only carried out by qualified staff in compliance with existing laws 2 CHECKLIST Ciruit Components Cooling circuit Model F with D Resistance carter compressor yes yes High pressure switch yes yes Low pressure switch no no High pressure trasducer yes yes Low pressure trasducer yes yes Solenoid valve of hot gas injecton no yes By pass valve of hot gas yes yes Exchanger EV EV CN yes yes Exchanger desuperheater no yes Exchanger glycol free no no Cock the liquid and discharge yes yes hydraulic circuit Version F 00 200 220 250 280 300 330 360 Water filter yes yes yes yes yes yes yes Flow switch yes yes yes yes yes yes yes Air vent yes yes yes yes yes yes yes hydraulic circuit Ve
28. ess than 50 ppm Total hardness less than 50 ppm Sulphur ions none ammonia ions none Silicone ions less than 30 ppm 5 5 SAFETY AND CONTROL COMPONENTS HIGHT PRESSURE SWITCH With fixed calibration placed on the high pressure side of the chiller circuit it shuts down compressor opera tion in the case of abnormal operating pressure HIGH PRESSURE TRASDUCER Placed on the high pressure side of the chiller circuit it communicates to the control card the operating pressure sending a pre alarm in case of abnormal pressure LOW PRESSURE TRANSDUCER Allows displaying on the microprocessor board display the value of the compressor s suction pressure one per circuit on the low pressure side of the cooling circuit REFRIGERANT CIRCUIT SAFETY VALVE This intervenes by releasing overpressure in the event of abnormal working pressure levels Calibrated at 653psi 45bar on the HP branch Calibrated at 435psi 30bar on the BP branch Aermec cod 4086985_00 02 2013 DCPX_UL CONDENSATION PRESSURE CONTROLLER This accessory allows correct functioning when exter nal temperatures drop below 50 F 10 C up to 14 F 10 C It consists of an adjustment circuit board that varies the number of fan revs according to the conden sation pressure read by the high pressure transducer in order to keep it sufficiently high for correct unit functioning 5 6 ELECTRICAL COMPONENTS Electric board in compliance wit
29. essure Sound power FREE COOLING MODE Inlet temperature 59 00 F Sound power Sound Pressure Outlet temperature 51 64 F Aermec determines sound power values in agreement Sound pressure measured in free field conditions with At 7 36 F withthe 9614 Standard reflective surface directivity factor Q 2 at 10 mt External temperature 35 60 F distance from external surface of unit in compliance with ISO 3744 regulations 12 Aermec cod 4086985_00 02 2013 NRL FC 2000 3600 60Hz 9 OPERATING LIMITS The devices in their standard configurations are not suitable for installation in salty environments For the operating limits refer to diagram valid for AHRI standard conditions Wind breaks should be implemented if the unit is installed in particularly windy areas to prevent malfunction of the unit a ATTENTION A When the unit is installed in particularly windy areas we recommend installing wind barriers if wind speed exceeds 2 5 m s 9 1 DESIGN SPECIFICATIONS REFRIGERANT SIDE F 122 113 104 Outside air temperature d b High pressure 0 Boe 8 F 36 C A Operation with Standard operation _ _glycol vol S AT o ofc c 847 992 o vec 9 zoe 076 Nn thermostatic valve w cet c e
30. h the standards EN 60204 1 IEC 204 1 complete with transformer for the control circuit door lock main isolating switch fuses and contactors for compressors and fans clamps for REMOTE PANEL terminal boards of the spring type control circuits outdoor electric control board with double port and gaskets electronic control evaporator pump command consent relay and recovery pump only for version without group pumps All the cables numbered DOOR LOCK KNIFE SWITCH It is possible to access the electrical panel by discon necting the voltage then using the opening lever of the panel itself This lever can be blocked with one or more padlocks during maintenance in order to prevent the machine being powered up accidentally REMOTE CONTROL PANEL PR3 This allows the chiller command operations to be given from a distance CONTROL KEYPAD Provides full control functions For a detailed descrip tion refer to the user manual Electronic regulation GR3 Consisting of a management control card and a visualisation card Functions carried out adjustment of water temperature at evapo rator inlet with thermostat control for up to 4 levels and integral proportional fan speed control with DCPX UL accessory compressor start up delay compressor sequence rotation count of compressor work hours start stop reset permanent alarms memory autostart after voltage drop multi lingual messages
31. l percentage value necessary to produce water at the desired temperature Initial rates for EXTERNAL AIR TEMPERATURE and TEMPERATURE OF PRODUCED WATER are not directly related therefore it is not possible to refer to the curve of one of these rates to obtain corresponding point on the curve of the other rate 18 2 20 1 210 AP 2 2 00 1 90 1 80 1 70 1 60 AP 5 1 50 1 40 1 30 u Gw 1 1180 L bon 2 110 ay 1 00 0 99 0 98 Gay 0 96 0 95 0 94 3 4 Correction factors 224 30 31 35 404 40 F C 0 5 40 15 20 5 30 35 40 45 50 55 Glycol Outside air temperature gt Processed water temperature Corrective factors for cooling capacity Corrective factors of the input power Corrective factors of heating capacity Correction factors for pressure drop av temp 3 5 C 25 7 F Correction factors for pressure drop av temp 0 5 C 32 9 F Correction factors for pressure drop av temp 5 5 C 41 9 F Correction factors for pressure drop av temp 9 5 C 49 1 F Correction factors for pressure drop av temp 47 5 C 117 5 F Correction factor of flow rates evap
32. mperatures contact the office 2 Versions avaible only on demand Aermec cod 4086985_00 02 2013 5 DESCRIPTION OF THE COMPONENTS 5 1 CHILLER CIRCUIT COMPRESSOR High efficiency scroll type hermetic compressors driven by a 2 pole electric motor with internal thermal protec tion of the electric heater casing included as standard HEAT EXCHANGER SYSTEM SIDE Of the plate type AISI 316 externally insulated with closed cell material to reduce thermal dispersion Fitted as standard with antifreeze heater DESUPERHEATER Of the plate type AISI 316 externally insulated with closed cell material to reduce thermal dispersion Fitted as standard with antifreeze heater HEAT EXCHANGER SOURCE SIDE Scambiatore a pacco alettato realizzato con tubi in rame e alette in alluminio adeguatamente spaziate in modo da garantire il miglior rendimento nello scambio termico FILTER DRIER Of the mechanical cartridge type made of ceramics and hygroscopic material able to trap impurities and any traces of humidity in the chiller circuit ONE WAY VALVE Allows the passage of the refrigerant in just one direction THERMOSTATIC VALVE The mechanical type valve with outside equaliser on the evaporator outlet modulates the gas flow to the evaporator on the basis of the thermal load in such a way as to ensure the proper degree of overheating of the intake gas SOLENOID VALVE The valve closes when the compressor turns off
33. put power correction factors Aermec cod 4086985_00 02 2013 NRL FC 2000 3600 60Hz 11 FREE COOLING FUNCTIONING CORRECTIVE FACTORS The maximum cooling capacity yielded when fun ctioning is completely in free cooling mode i e all compressors are off is obtained by multiplying the cooling capacity nominal value Pf given in the Technical Data by the respective corrective coefficient which is obtained from the following diagram on the basis of the temperature of the water produced and the temperature of the external air These values refer to the fans in full rev con ditions maximum input power If the power yielded should result in excess a modulation will intervene on the number of revs 11 1 FOR At DIFFERENT FROM THE RATED VALUE Free cooling corrective coefficient Pf The performances given by the technical data refer to AHRI standard conditions flow rate 0 0431 5 per kW At 10 01 F 5 56 Use table to obtain the corrective factors of the cooling capacity and input power different than At 10 01 F 5 50 C 11 2 FOULING FACTORS The performance levels given by the technical data refer to conditions with clean tubes with a fouling factor 1 For other fouling factor values multiply the data of performance table by the coefficients given Aermec cod 4086985_00 02 2013 FREE COOLING ONLY FUNCTIONING COOLING CAPACITY CORRECTIVE C OEFHC IENTS 4 00 20 C 4 F
34. r the machine during start up phase Accessories can only be fitted in the factory PGS Daily Weekly Programmer Allows you to programme two time bands per day two switch on off cycles and to have differentiated programming for each day of the week PRM1 PRM2 FACTORY FITTED ACCESSORY It is a manual pressure switch electrically wired in series with the existing automatic high pressure switch Model Model with Hydronic kit 00 2000 AVX 770 2250 AVX 776 2500 AVX 782 2800 AVX 788 3000 AVX 794 3300 AVX 801 3600 AVX 801 Model with Hydronic kit P3 P4 AVX 772 AVX 778 AVX 784 AVX 790 AVX 796 AVX 803 AVX 803 Model with Hydronic kit 03 04 AVX 771 AVX 777 AVX 783 AVX 789 AVX 795 AVX 802 AVX 802 10 Aermec cod 4086985_00 02 2013 NRL FC 2000 3600 60Hz 7 TECHNICAL DATA vers F CHILLER FUNCTION Model Cooling capacity 2000 2250 2500 2800 3000 3300 3600 Total power input Total power input with HIGH PUMP Water flow rate Total pressure drop Useful head with HIGH PUMP ENERGY INDICES EER BTU Wat IPLV PROTECTION RATING BTU Wat IP ELECTRICAL DATA Total input current 0 Model WITHOUT PUMP L R A M C A Recom fuse gt gt gt gt gt gt gt gt Model WITH HIGH HEAD PUMP
35. rsion P1 P4 200 220 250 280 300 330 360 Water filter yes yes yes yes yes yes yes Flow switch yes yes yes yes yes yes yes Safety valve yes yes yes yes yes yes yes Air vent yes yes yes yes yes yes yes Pump yes yes yes yes yes yes yes Expansion tank yes yes yes yes yes yes yes hydraulic circuit Version 01 04 200 220 250 280 300 330 360 Water filter yes yes yes yes yes yes yes Flow switch yes yes yes yes yes yes yes Safety valve yes yes yes yes yes yes yes Air vent yes yes yes yes yes yes yes Pump yes yes yes yes yes yes yes Expansion tank yes yes yes yes yes yes yes Storage tank yes yes yes yes yes yes yes Version with DESUPERHEATER D hydraulic circuit Version with D 200 220 250 280 300 330 360 Water filter no no no no no no no Differential pressure switch no no no no no no no Flow switch no no no no no no no Exchanger desuperheater yes yes yes yes yes yes yes hydraulic circuit Version A with D 200 220 250 280 300 330 360 Water filter desuperheater no no no no no no no Differential pressure switch desuperheater no no no no no no no Flow switch desuperheater no no no no no no no Exchanger desuperheater yes yes yes yes yes yes yes
36. sh both glycol percentage and relative correction coefficients 14 1 HOW TO INTERPRET GLYCOL CURVES The curves shown in the diagram summarise a significant number of data each of which is represented by a specific curve In order to use these curves correctly it is first neces sary to make some initial reflections 1 Ifyou wish to calculate the percentage of glycol on the basis of the external air temperature enter from the left axis and on reaching the curve draw a vertical line which in turn will intercept all the other curves the points obtained from the upper curves represent the coefficients for the correction of the cooling capacity and input power the flow rates and the pressure drops remember that these coefficients must be multiplied by the nominal value of the size in question while the glycol percentage value recommended to produce desired water temperature is on the lower axis 2 Ifyou wish to calculate the percentage of glycol on the basis of the temperature of the water produced enter from the right axis and on reaching the curve draw a vertical line which in turn will intercept all the other curves the points obtained from the upper curves represent the coefficients for the correction of the cooling capacity and input power the flow rates and the pressure drops remember that these coeffi cients must be multiplied by the nominal value of the 3 sizein question while the lower axis recommends the glyco
37. verage water temperature F C 41 5 50 10 59 15 68 20 86 30 104 40 122 50 Coefficients 0 91 16 Aermec cod 4086985_00 02 2013 NRL FC 2000 3600 60Hz 13 USEFUL HEADS 13 1 CHILLER FUNCTION USEFUL HEADS psi kPa 58 01 400 1 NRL 2000 50 76 350 2 NRL 2250 43 51 300 3 NRL 2500 a 36 26 250 4 NRI 2800 8 9 2901 200 2 3 6 5 NRL 3000 o 21 76 150 NRL 3300 14 50 100 NRL 3600 7285 50 0 Q Q O o Q o e m N co D ki D 1 Cu fo Cu o co Cu st N Cu te O CD a N D a a m Ni fe o Water flow rate 13 2 FREE COOLING FUNCTION USEFUL HEADS psi kPa 58 01 400 NRL 2000 50 764 350 6 2 NRL 2250 43 51 300 NRL 2500 36 26 250 3 5 4 NRL 2800 4 I Eran as 5 NRL 3000 D amp 21 76 150 3 NRL 3300 7 14504 100
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