Technical Manual (53.68 - 130.93: Free-Cooling)
Contents
1. 43 51 300 RL 800 MRI 1250 36 25 250 29 00 200 21 75 150 15 50 100 Pressure drops 7 25 50 4 0 10000 20000 30000 40000 50000 60000 70000 80000 0 44 88 132 176 220 264 308 352 g m Water flow rate 16 Aermec cod 1301 4086984 00 NRL FC 800 1800 60Hz 13 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 applica tion of the water flow rate correction factor The water flow rate correction factor is calcula ted 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 per centage 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 tempe rature line or the water produced line A point from which the vertical line will pass is obtained and this will distinguish b2. II o amp Hmn KEY 15 MINIMUM WATER CONTENT ey 1 Check that the highest user does not exceed a level difference of 55 metres 2 Check that the lowest user can sustain the global pressure acting at that point Minimum water content 0800 0900 1000 2 1250 1400 Minimum water content in the case of process applications or applications with low outside temperatures and low load Regolation on the temperature outlet water project At less than 5 1500 1650 1800 1 ATTENTION It is recommended to design systems with highwater content minimum recommended values shown in table to limit 2 Thehourly number of inversions betweenfunctioning modes 3 Decrease in water temperature during winter defrost cycles 18 Aermec cod 1301 4086984 00 NRL FC 800 1800 60Hz 16 PARTLOAD COOLING AHRI CONDITIONS Inlet temperature Outlet temperature At External temperature 53 60 F 44 6 F 10 01 F 95 F Power steps COOLING CAPACITY 1 2 3 4 5 6 800 25 50 75 100 900 27 53 77 100 1000 25 50 75 100 1250 25 50 75 100 1400 23 44 63 82 100 1500 17 34 50 67 84 100 1650 19 37 55 71 86 100 1800 17 34 50 67 84 100 POWER SUPPLY 6 800 21 44 71 100 900 23 47 73 100 1000 21 100 1250 21 44 7 100 1400 18 37 56 77 100 1500 12 26 41 59 79 10
3. yes yes Flow switch yes yes yes Safety valve yes yes yes yes Air vent yes yes yes yes Pump yes yes yes yes Expansion tank yes yes yes yes yes yes yes yes Storage tank yes yes yes yes yes yes yes Version with DESUPERHEATER D hydraulic circuit Water filter Differential pressure switch Flow switch Version F with D Exchanger desuperheater hydraulic circuit Version A with D Water filter desuperheater Differential pressure switch desuperheater Flow switch desuperheater 200 220 250 280 300 no no no no no no yes yes 200 220 250 280 300 no no mo no no Exchanger desuperheater yes yes Safety valve Air vent Pump Expansion tank yes yes yes yes yes Storage tank yes no no no yes no no no yes yes yes yes yes yes 330 360 1800 n no no no no n no no no no no no no yes yes yes yes yes 0 0 330 360 1800 no no no no no no no yes yes yes yes yes yes yes yes yes yes yes yes yes Aermec cod 1301 4086984 00 NRL FC 800 1800 60Hz 3 field 1 2 3 4 5 6 10 11 12 13 14 15 16 CONFIGURATOR Code Size Compressors 0 NRL 080 090 100 125 140 150 165 180 Standard compressor Thermostatic valve
4. gt exchanger EVAPORATION FREE COOLING SYSTEM SIDE Production cold water CN Sign Description T d CP compressor CN Air side exchange gt gt TEV Thermostatic valve BHE Exchanger plate V3V three way valve e v a H O RETURN 2 SYSTEM A pue N H O DISCHARGE SYSTEM 6 Aermec cod 1301 4086984 00 NRL FC 800 1800 60Hz 4 2 COLD WATER PRODUCTION AND THE SYSTEM RECOVERY DESUPERHEATER BHE Description Operation gt D exchanger EVAPORATION 6 H O SUPPLY SYSTEM SIDE Production of cold water 0 exchanger CONDENSATION A SOURCE SIDE Heat exchange with the air ah DISCHARGE 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 exchange TEV Thermostatic valve BHE Exchanger plate V3V three way valve CN F 7 BHE NZ H O RETURN a SYSTEM A gt H O SUPPLY SYSTEM Aermec cod 1301 4086984 00 7 5 DESCRIPTION OF THE COMPONENTS 5 1 CHILLER CIRCUIT SCROLL 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 wit
5. o Y X Model Heat recovery o 2 Version A 2 Coils R S V Ventilation Power supply 6 7 8 Hydronic kit 00 03 04 P3 P4 Standard mechanical thermostatic valve with produced water up to 39 2 F 4 Mechanical thermostatic valve with produced water from 39 2 4 to 42 8 F 6 C 0 Electronic thermostatic valve with produced water up to 39 2 F 4 Free cooling Without recovery units Desuperheater High efficiency High efficiency silenced version Made of aluminium Made of copper Tinned copper Painted aluminium epoxy paint Fan speed modulating for condensation control 230V 3 60Hz available omly for NRL 800 size with thermomagnetic switches 460V 3 60Hz with thermomagnetic switches 575V 3 60Hz with thermomagnetic switches Without hydronic kit Water storage tank and high head single pump Water storage tank with high head pump and reserve pump Without water storage tank with high head pump Without water storage tank with high head pump and reserve pump 0 For lower temperatures contact the office Versions avaible only on demand Aermec cod 1301 4086984 00 NRL FC 800 1800 60Hz 4 PRINCIPLE OF OPERATION SCHEMES 4 1 PRODUCTION OF COLD WATER ONLY THE SYSTEM CN Description Operation 4 exchanger EVAPORATION SYSTEM SIDE Production cold water 8 exchanger CONDENSATION gt SOURCE SIDE Heat exchange with the air
6. 093 091 11 2 FREE COOLING FUNCTION PRESSURE DROP PSI kPa 50 76 450 Inlet water temperature 15 59 F Outside air temperature 2 35 6 SESS Rated water flow Compressors off en p 50 76 350 1000 900 43 51 300 800 O 36 26 250 2 2 a 4 2900 0 21 75 150 14 50 100 7 25 50 000 0 0 20000 40000 60000 80000 100000 120000 0 88 176 264 352 440 528 g m Water flow rate Average water temperature F C 41 5 50 10 59 15 68 20 86 30 104 40 122 50 Coefficients __ 10 07 0 Aermec cod 1301 4086984 00 15 NRL FC 800 1800 60Hz 12 USEFUL HEADS 12 1 CHILLER FUNCTION USEFUL HEADS psi kPa 58 01 400 4 50 76 350 N 43 51 300 N 0 8 RL 36 25 250 29 00 200 Pressure drops 21 75 150 15 50 100 7 25 50 0 10000 20000 30000 40000 50000 60000 70000 80000 I h 0 44 88 132 176 220 264 308 352 g m Water flow rate 12 2 FREE COOLING FUNCTION USEFUL HEADS psi kPa 58 01 400 Mix 7 50 76 350 5
7. 39 68 18 0 39 68 39 68 R410A Gas refrigerant Oil DIMENSION Height Width Depth Weight when empty 8 TECNICAL DATA IDRONIC KIT 800 900 1000 1250 1400 1500 1650 1800 Cooling capacity Alls Tons 84 11 Total power input Alls 17 36 Total power input with HIGH PUMP Alls 24 86 Water flow rate Alls 283 E Useful head with HIGH PUMP 20 21 19 22 19 ENERGY INDICES EER BTU Wat 46 23 51 75 58 80 45 15 50 50 58 90 51 27 58 21 PROTECTION RATING 4 ELECTRICAL DATA Total input current 0 460V A 15 2 575 13 3 5 dB A 39 3 3 9 95 95 12 Aermec cod 1301 4086984 00 NRL FC 800 1800 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 a malfunction of the unit ATTENTION m s 9 1 DESIGN SPECIFICATIONS REFRIGERANT SIDE When the unit is installed in particularly windy areas we recommend installing wind barriers if wind speed exceeds 2 5 C 122 50 ec 114 87 J 113 45 TE icis
8. av temp 47 5 C 117 5 F NOTE A Although the graph arrives at external air temperatures of 40 C F unit operational limits must be considered C m E gt gt U U 9 F Processed water temperature 17 NRL FC 800 1800 60Hz max 2 180 44 ft 55 m 14 EXPANSION TANK CALIBRATION m The standard pressure value for pre charging the expansion tank S is 1 5 bar and the volume is 25 litres Maximum value 6 bar lt The tank must be calibrated according to the maximum difference m in height H of the device see figure according to the formula p calibration bar m 10 2 0 3 For example if the level difference H is 20m the calibration value of the tank will be 2 3 bar lt 40 If the calibration value obtained from the calculation is lower than un 1 5 i e for H 12 25 maintain the standard calibration pe jtd p mu H L H P KEY N 1 Check that the highest user does not exceed a level diffe rence of 180 45ft a H 0 ft 0m Y 5 Y 2 Check that the lowest user can sustain the global pressu re acting at that point 18 tr Ld A EJ EJ Lun
9. Q 2 95 35 5 86 0 Operation Standard E with water mode g 59 15 x 50 10 c 41 5 withyglycolfand Withaccessory DCPX dii accessony DGPX GF eJ 23 5 14 10 5 15 sh was Pado eur D MESSIS mE ue QO O SE CN OO CO O CN CO CN SE FCN O CO QO TN MO m cI s G s c F _ CN CGN CN CN CN m e m e m MOTT SE NLN LO Ln LO LO LO LO O oO Thermostatic Valv Y ole Thermostatic Valv gt Thermostatic Valv X gt Water temperature produced EVAPORATOR High pressure Low pressure side side Acceptable maximum pressure bar PSI 30 435 Acceptable maximum temperature C F 120 248 51 131 Acceptable minimum temperature CI F 30 22 WATER SIDE Acceptable maximum pressure Hydarulic circuit safety valve only in version with storage tank or with pump bar PSI Calibrated at 6 87 bar PSI and with piped discharge which intervents by discharging overpressure if abnormal work pressure occur ATTENTION The units in standard configuration are not suitable for installation in salty environmentsto If the unit is to function beyond the operational limits we recommend you first contact our technical sales service Note 1 N8 In summer mode the unit can be started with external air 46 114 8 and water inlet 35 C 95 F In winter mode the unit can be
10. started with external air 15 5 and water inlet 20 C 68 F Operate in such conditions is permitted Aermec cod 1301 4086984 00 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 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 ATTENTION FOR At DIFFERENT FROM 10 01 F 5 56 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 3 1 FREECOOLING CORRECTIVE COEFFICIENTS The maximum cooling capacity yielded when functi
11. 17 18 18 5 18 1 18 2 18 3 18 4 18 6 18 7 18 8 DESCRIPTION AND CHOICE OF THE iz dg ace eect CONFIGURATOR A PRINCIPLE OF OPERATION SCHEMES it koc vn PRODUCTION OF COLD WATER ONLY THE SYSTEM COLD WATER PRODUCTION AND THE SYSTEM RECOVERY IDESUPERHEATER DESCRIPTION OF THE COMPONENTS CHILLER CIRCUIT cedem n TU eda FRAMEANDFANS HYDRAULIC CIRCUIT STANDARD VERSION HYDRAULIC HYDRAULIC COMPONENTS FOR CONFIGURABLE VERSIONS WATER FEATURES unamasa aaa SAFETY AND CONTROL ELECTRICAL COMPONENTS ON IR ACCESSORIES MECHANICAL ACCESSORIES te ER ON OR OE derit ELECTRICAL ACCESORIES TECHNICAL DATA VERS CHILLER 6 0 TECNICAL DATA IDRONIC KIT denen eni RR Heu EQ Rr OPERATING On edes Qd ara cre utet DESIGN SPECIFICATIONS CORRECTION INPUT POWER AND COOLING CAPACITY AIGH EFFICIENCY VERSION Lease ga a a FREECODLING CORRECTIVE COEFFICIENTS FOR AT DIFFERENT FROM THE RATED VALUE FOULING FACTORS T
12. 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 5 C 18 800 0 120 140 150 1650 1800 HIGH PRESSURE SWITCH WITH MANUAL RESET bar 580 580 580 580 580 580 580 580 HIGH PRESSURE TRANSDUCER Tap psi 39 39 39 39 39 39 39 39 566 566 566 566 LOW PRESSURE TRANSDUCER 2 2 2 2 TBP bar 29 29 29 29 29 29 29 29 CHILLER CIRCUIT SAFETY VALVE psi 45 45 45 45 45 45 45 45 bar 653 653 653 653 653 653 653 653 20 Aermec cod 1301 4086984 00 NRL FC 800 1800 60Hz 18 5 COMPRESSOR THERMOMAGNETIC 220V 3 60HZ COMPRESSOR THERMOMAGNETIC Circuit 18 1 COMPRESSOR THERMOMAGNETIC 460V 3 60HZ COMPRESSOR EN circuit 800 900 1000 1250 1400 1500 1650 1800 1 30 4 30 4 40 5 51 5 51 5 40 5 40 5 51 5 1 30 4 30 4 40 5 51 5 51 5 40 5 40 5 51 5 MTC1B A 40 5 40 5 40 5 51 5 MTC2 A 30 4 40 5 40 5 51 5 40 5 40 5 51 5 51 5 MTC2A 2 30 4 40 5 40 5 51 5 40 5 40 5 51 5 51 5 MTC2B A 40 5 51 5 51 5 18 2 COMPRESSOR THERMOMAGNETIC 575V 3 60HZ COMPRESSOR 7 THeRMomacnetic 800 900 1000 1250 1400 1500 1650 1800 1 27 5 27 5 32 3 41 7 41 7 32 3 32 3 41 7 1 1 27 5 27 5 32 3 41 7 41 7 32 3 32
13. 3 41 7 1 32 3 32 3 32 3 41 7 MTC2 A 27 5 32 3 32 3 41 7 32 3 32 3 41 7 41 7 MTC2A A 2 27 5 32 3 32 3 41 7 32 3 32 3 41 7 41 7 MTC2B A 32 3 41 7 41 7 18 3 PUMP THERMOMAGNETIC 03 P3 COMPRESSOR Power supply 1500 1650 1800 THERMOMAGNETIC 1 A 460V 3 60Hz 7 2 9 7 9 7 13 3 19 5 19 5 A 575V 3 60Hz 5 8 13 7 7 7 7 10 6 10 6 15 4 15 4 14 5 2 460V 3 60Hz 7 2 9 7 9 7 13 3 19 5 19 5 575V 3 60Hz 5 8 77 7 7 10 6 15 4 15 4 18 4 PUMP THERMOMAGNETIC 04 P4 Power supply 1500 1650 1800 THERMOMAGNETIC 7 14 5 575V 3 60Hz 17 7 6 10 6 15 4 15 4 MP1A A 460V 3 60Hz 2 8 9 7 1 2 13 3 19 5 19 5 575V 3 60Hz 77 7 7 7 10 6 10 6 15 4 15 4 MP2 13 3 19 5 1515 x sos 10 6 15 4 15 4 575V 3 60Hz 5 8 7 7 7 7 2 10 6 10 6 15 4 15 4 Aermec cod 1301 4086984 00 21 NRL FC 800 1800 60Hz 18 6 FAN UNITS THERMOMAGNETIC 220V 3 60HZ COMPRESSOR THERMOMAGNETIC di MTV1 A 7 2 MTV1A A 7 2 MTV1B A i MTV1C A MTV2 A 7 2 MTV2A A 7 2 MTV2B A i MTV2C A 18 7 FAN UNITS THERMOMAGNETIC 460V 3 60HZ 800 900 1000 1400 1500 1650 1800 THERMOMAGNETIC MTV1 A 42 42 42 42 42 42 MTV1B A 4 2 4 2 4 2 1 42 4 2 MTV2 A 4 2 4 2 4 2 MTV2A A 4 2 4 2 4 2 MTV2B A 4 2 4 2 MTV2C A 4 2 4 2 18 8 FAN UNITS THERMOMAGNETIC 575V 3 60HZ 800 900 100
14. AVX Group of anti vibration to be installed under the base GP Protection grille protects the external coil from acci dental 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 10 AERWEB300 6G Web server to monitor and remote control max 6 units in 5485 network with integrated GPRS modem AERWEB300 18G Web server to monitor and remote control max 18 units in RS485 network with integra ted GPRS modem DRE It allows the reduction of peak power necessary for the machine during start up phase Accessories can only be fitted in the factory DUALCHILLER Simplified control system to switch on and off and command two chillers using Aermec GR3 command in a single system as if they were a single unit MULTICHILLER Control system to switch the individual chillers on and off and command them in a system in which several NRL FC 800 1800 60Hz units are installed in parallel always ensuring a con stant delivery to the evaporators 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 we
15. glycol 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 correspon ding point on the curve of the other rate Aermec cod 1301 4086984 00 Correction factors 140 1 390 1 1280 1 20 1180 1210 4 00 0590 0 875 AP 1 no AP 3 5 P Outside air temperature KEY Pc Pe Ph AP 1 AP 2 AP 3 AP 4 AP 5 Qw 1 Qw 2 41 5 i 32 El lt v A ro qm 22 30 31 35 401 40 cj pg O 5 0 20 65 30 35 40 45 50 55 Glycol 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 av temp 9 5 C 49 1 F Correction factor of flow rates cond
16. 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 order to reduce the thermal dispersion and elimina te the phenomenon of the formation of condensation it is insulated with polyurethane material of a suitable thickness NRL FC 800 1800 60Hz Aermec cod 1301 4086984 00 NRL FC 800 1800 60Hz 5 4 1 WATER FEATURES PH 6 8 Electric less than 200 mV cm conductivity 77 E2518 Chloride ions less than 50 ppm Sulphuric acid ions less than 50 ppm Total iron less than 0 3 ppm Alkalinity M less 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 pressu re sending a pre alarm in case of abnormal pressure REFRIGERANT CIRCUIT SAFETY VALVE This intervenes by releasing overpressure in the event of abnormal work
17. 0 1650 14 29 46 63 81 100 1800 12 79 100 Aermec cod 1301 4086984 00 19 17 SOUND DATA NRL FC 800 1800 60Hz Sound power Total sound levels Octave band Hz Aermec determines the sound power value on NRL Pour 125 250 500 1000 2000 4000 8000 the basis of measurements taken in accordance dB A dB A Sound power by central band frequency dB A with standard 9614 2 in compliance with the Eurovent certification 800FA 89 83 0 471 73 0 62 9 900FA 89 83 0 77 7 73 0 62 9 Sound pressure 1000FA 90 83 9 81 3 77 1 66 9 Sound pressure in free field on a reflecting plane 1250FA 93 87 5 85 4 79 0 66 1 directional factor Q 2 in accordance with 1400FA 94 90 0 83 2 75 0 65 9 standard ISO 3744 1500FA 94 880 832 75 5 66 9 1650FA 95 90 0 85 2 77 0 67 9 1800 95 90 5 84 2 75 0 66 9 800 82 75 0 69 7 65 5 57 4 900FE 82 75 0 69 7 65 5 57 4 1000FE 83 76 0 70 7 66 5 58 4 1250FE 87 81 0 79 7 72 5 62 4 1400FE 88 82 0 76 7 67 5 59 4 1500FE 88 78 5 75 7 66 5 58 4 1650FE 89 82 5 80 7 70 5 63 4 1800FE 89 83 5 80 2 70 5 62 8 18 CONTROL AND 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 6 C ANTI FREEZE INTERVENTION min Max default Anti freeze alarm intervention temperature on EV side 15 C 5 F 4 C 39
18. 0 1400 1500 1650 1800 THERMOMAGNETIC MTV1 A 3 7 3 7 3 7 MTV1A A 3 7 3 7 3 7 MTV1B A Ro qoo a a 37 37 37 37 3 7 MTV1C A po 397 37 37 3 7 MTV2 3 7 3 7 3 7 2 3 7 3 7 3 7 MTV2B A 125 7 37 3 7 MTV2C A gt o T x 11 3 7 22 Aermec cod 1301 4086984 00 M COMPANY QUALITY SYSTEM A AERMEC S p A Y A E M EC 37040 Bevilacqua VR Italy Via Roma 996 ICIIVI Tel 39 0442 633111 150 9001 2008 p n 0128 3 Telefax 0442 93730 439 0442 93566 www aermec com info Qaermec com stone C C cisa e The technical data on the following documents are not binding Aermec reserves the right to make any changes at any time deemed necessary for product improvement AERMECSPA S P A
19. 0 Tr 5 C 41 F c 10C 5DF 1001 1025 SE 2 O 15 C 59 F 2 0 50 Q r 0 00 10 8 6 4 0 4 6 8 10 12 14 15 16 18 20 22 24 26 28 14 176 212 248 284 32 356 392 428 464 50 536 57259608 644 68 716 752 788 824 F Processed water temperature AT DIFFFERENT FROM THE RATED VALUE 5 10 01 F 3 C 5 40 F 5 56 C 10 01 F 8 14 40 10 C 18 F Cooling capacity correction factors Input power correction factors FOULING FACTOR K M2 KW Cooling capacity correction factors Input power correction factors Aermec cod 1301 4086984 00 NRL FC 800 1800 60Hz 11 TOTAL PRESSURE DROPS 11 1 CHILLER FUNCTION PRESSURE DROP PSI kPa Inlet temperature 53 6 F 5076 350 Outlet temperature 44 6 F Outside air temperature 95 F num 43 51 300 Average water temperature 50 1400 For temperatures other than 50 to use the table of 2626 250 1000 1250 correction factors 5 900 2 gt 2900 200 800 21 75 150 14 50 100 725 50 000 0 0 20000 40000 60000 80000 100000 120000 Wh 0 88 176 264 352 440 528 g m Water flow rate Average water temperature F C 41 5 50 10 59 15 68 20 86 30 104 40 122 50 Coefficients __ 10 1 os 09 095
20. 42 hel Eur I um m o jd 0 9 44 C 111 2 F 0 M 0 8 gt RES 0 6 E 0 5 52 0 4 6 6 4 2 0 2 4 6 67 8 10 12 14 16 18 O 21 2 24 8 28 4 32 0 35 6 39 2 42 8 44 6 46 4 50 0 53 6 57 2 60 8 64 4 F Processed water temperature CORRECTION COEFHCIENTS OF THE INPUT POWER IN COOLING MODE 14 1 3 o 5 a 4 2 T 0 m 5 44 C 111 2 F e wi 40 C 104 F 5 11 35 95 0 86 0 1 0 4 c 25 77 4 O 0 9 20 68 9 O o 4 0 8 5 P 0 7 0 c 0 0 6 6 4 2 0 2 4 6 67 8 10 12 14 16 18 21 2 24 8 28 4 32 0 35 6 39 2 42 8 44 6 46 4 50 0 53 6 57 2 60 8 64 4 F Processed water temperature POWER CORRECTION COEFHCIENTS REFRIG ERATOR FUNCTIONING ONLY FREE COOLING 4 00 20 4 F 3 50 15 5 2 8 10 14 2 50 E E 5 C 23 F c ct 2 00 00 32 0 o lt T 20 3566 9 5 1 5
21. AERMEC air conditioning 9 925392 TECHNICAL MANUAL CHILLER e EXTERNAL UNITS e HIGHT EFFICIENCY NRL free cooling e POWER SUPPLY 60Hz 800 1800 D AHRI Standard 550 590 AERMEC S P A NRL FC 800 1800 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 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 1301 4086984 00 NRL FC 800 1800 60Hz KEY 4 1 4 2 5 1 5 2 5 3 5 4 5 4 1 5 5 5 6 6 1 6 2 9 1 10 10 1 10 3 1 10 2 10 3 11 11 1 11 2 12 12 1 12 2 13 12 3 14 15 16
22. OTAL PRESSURE DROPS CHILLER FUNCTION PRESSURE FREE COOLING FUNCTION PRESSURE DROP USEFUL HEADS neatis M repu vi Fami per CHILLER FUNCTION USEFUL HEADS trahit oci her FREE CODLING FUNCTION USEFUL HEADS HOW TO INTERPRET GLYCOL CURVES EXPANSION TANK CALIBRATION a MINIMUM WATER CONTENT PARTLOAD SOUND CONTROL AND SAFETY PARAMETERS CALIBRATION COMPRESSOR THERMOMAGNETIC 220V 3 60HZ COMPRESSOR THERMOMAGNETIC 460V 3 60HZ COMPRESSOR THERMOMAGNETIC 575V 3 60HZ PUMP THERMOMAGNETIC 03 3 eese PUMP 04 04 FAN UNITS THERMOMAGNETIC 220 3 60 7 FAN UNITS THERMOMAGNETIC 460 3 60 2 FAN UNITS THERMOMAGNETIC 575 3 60 7 Aermec cod 1301 4086984 00 Standards and directives to be followed in the design and manufacture of the unit STANDARD 1 UL 1995 Heating and cooling equipment 2A ANSI NFPA Sstandard 70 National Electrical code N E C CSA C 22 1 C 22 2 Safety Standard Electrical Installation SAFETY LEVEL 1 4 1 DESCRIPTION AND CHOICE OF THE UNIT The NRL Free cooling series appliances are wate
23. ek PRM1 PRM2 FACTORY FITTED ACCESSORY It is a manual pressure switch electrically wired in series with the existing automatic high pressure switch on the compressor discharge pipe AER485 RS 485 interface for supervision systems with MODBUS protocol FOR MORE INFORMATION PLEASE CONTACT US Aermec cod 1301 4086984 00 NRL FC 800 1800 60Hz 7 TECHNICAL DATA vers F CHILLER FUNCTION Model 800 900 1000 1250 1400 1500 1650 1800 Cooling capacity Tons 50 19 56 41 62 80 81 92 8699 10340 10994 118 09 Total power input kW 69 78 8622 10233 12692 14249 21418 16946 19400 Total power input with HIGH PUMP Alls kW 106 33 221 68 Water flow rate Alls gpm 151 24 Total pressure drop Alls psi 12 14 psi 24 29 27 25 20 ENERGY INDICES EER BTU Wat IPLV BTU Wat PROTECTION RATING 24 24 24 24 ELECTRICAL DATA 230V A 216 10 Total input current A 11020 13120 15190 575V A 90 00 106 30 122 40 156 10 172 00 202 50 206 60 236 20 Model WITHOUT PUMP L R A M O P RECOM FUSE Model WITH HIGH HEAD PUMP L R A M O P RECOM FUSE SCROLL COMPRESSORS 4 2 4 2 4 2 HEAT EXCHANGER SYSTEM SIDE TRENT Exchanger capacity Water connections HYDRONIC GROUP SYSTEM SIDE STORAGE TANK Buffer tank capacity n
24. gal 185 1x185 XE SS 1x185 1 1855 1 185 1x185 1x185 EXPANSION TANK 2 7 27 2 7 2x7 psi 2175 2175 2175 2175 HIGH HEAD PUMP Pump power input kW 3 0 4 00 4 00 5 50 5 50 7 50 7 50 7 50 COOLING AAHRI STANDARD CONDITIONSA Outlet water temperature 6 7 C 44 6 F Flow rate 0 0431 5 per kW External temperature 35 95 F 1 data refered to no pump version Aermec cod 1301 4086984_ 00 CONDITIONS LEAVING WATER 6 7 44 6 F FLOW RATE 0 043 L S PER KW FULL LOAD Load 100 air Load 7596 air Load 5096 air Load 2596 air 35 CIOST 26 7 80 06 18 3 64 94 F 12 8 55 04 F 11 m lt gt lt 2 Z Q LLJ NRL FC 800 1800 60Hz 800 900 1000 1250 1400 1500 1650 1800 Pump input current SAFETY VALVE Safety valve calibration FAN MOTORS Quantity Air flow Fan input current Fan power input SOUND DATA Sound pressure Sound power 34 0 74 96 35 0 76 16 35 0 76 16 45 0 99 21 45 0 99 21 48 0 105 82 66 0 145 51 64 0 141 10 34 0 74 96 36 0 79 37 35 0 76 16 47 0 103 62 47 0 103 62 48 0 105 82 70 0 154 32 64 0 141 10 64 1411 64 1411 1200 2646 1200 2646 12 0 26 46 18 0 39 68 18 0 39 68 39 68 6 4 14 11 1200 2646 12 0 26 46 12 0 26 46 18 0 39 68 18 0
25. h 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 MECHANICAL 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 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 SUPPORT FRAME Load bearing structure Made of hot galvanised steel sheet of a suitable thickness varnished with p
26. ing pressure levels Calibrated at 653psi 45bar on the HP branch Calibrated at 435psi 30bar on the BP branch 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 DCPX UL CONDENSATION PRESSURE CONTROLLER This accessory allows correct functioning when external 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 EVAPORATOR ANTIFREEZE HEATING ELEMENT Its operation is commanded by the antifreeze probe located in the plate evaporator It is acti vated when the water temperature is 3 and deactivated when the water temperature is 5 The dedicated software in the regulation card manages the heater 5 6 ELECTRICAL COMPONENTS Electric board in compliance with standards EN 60204 1 IEC 204 1 complete with door lock main isolating switch fuses and contactors for compressors and fans terminals for REMOTE PANEL spring type control circuit terminal board outdoor electric board with double door and gaskets electronic controller evaporator pump and recovery pump control consent relay Aermec cod 1301 4086984 00 all n
27. lable in the versions 1 YD 2 XD ACOUSTIC PART 1 ISO DIS 9614 2 sound intensity method REFRIGERANT GAS R410A NRL FC 800 1800 60Hz 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 CHECK LIST 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 00 800 900 1000 1250 1400 Water filter yes yes yes yes yes yes yes Flow switch ves yes yes yes yes yes yes Air vent yes yes yes yes yes yes yes yes hydraulic circuit Version P3 P4 800 900 1000 1250 1400 Water filter yes yes yes yes yes yes yes Flow switch yes yes yes yes Safety valve yes yes yes yes Air vent ves yes yes yes yes yes yes yes Pump yes yes yes yes Expansion tank yes yes yes yes yes yes yes yes hydraulic circuit Version 03 04 800 900 1000 1250 1400 Water filter yes
28. olyester powders able to resist atmospheric agents over time FAN UNIT Axial fan balanced statically and dynamically The elec tric fans are protected electrically by magnet circuit breakers and mechanically by anti intrusion metal grids according to the IEC EN 60335 2 40 Standard 5 3 HYDRAULIC CIRCUIT standard version AIR WATER HEAT EXCHANGER FREE COOLING Crossed by water for the free cooling function Is made of copper pipes and aluminium blades blocked through the mechanical expansion of the pipes High efficiency type 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 WATER TEMPERATURE PROBE IN OUT 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 3 WAY VALVE This is an electric servo controlled ON OFF diver ting valve on the water side of the freecooling circuit controlled 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 HYDRAULIC COM PONENTS FOR CONFIGURABLE VERSIONS CIRCULATION PUMP HIGH PUMP Depending on
29. oning 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 conditions maximum input power If the power yielded should result in excess a modulation will intervene on the number of revs 10 2 FOR At DIFFERENT FROM THE RATED VALUE The performances given by the technical data refer standard conditions flow rate 0 0431 5 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 F7 5 56 C 10 3 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 14 NRL FC 800 1800 60Hz CORRECTION COEFHCIENTS OF THE COOLING CAPACITY O 1 6 20 C 68 F gt 25 77 1 30 86 14 35 95 c 13 o 1 2 ds ind 11 lt 40 C 104 F
30. oth glycol percentage and relative correc tion coefficients 12 3 HOW TO INTERPRET GLYCOL CURVES The curves shown in the diagram summarise a signifi cant number of data each of which is represented by a specific curve In order to use these curves correctly it is first necessary to make some initial reflections 1 Ifyou wish to calculate the percentage of glycol on the basis of the external air temperature en ter 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 tempe rature 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 rea ching the curve draw a vertical line which in turn will intercept all the other curves the points ob tained from the upper curves represent the coef ficients 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 3 size in question while the lower axis recom mends the
31. r 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 Maximum reliability The presence of several scroll compressors allows NRL chillers various partialisations of the cooling capacity 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 the cooling capacity recovery with free cooling the lower the integration is COMPRESSORS ONLY when the external air temperature is greater than the return temperatu re of the system water Models 1 NRL F free cooling The versions can be in different set ups at the same time in order to satisfy a wide range of plant engineering solutions 1 A HIGH EFFICIENCY 2 SILENCED HIGH EFFICIENCY 3 D WITH DESUPERHEATER The units with desuperheater D are not avai
32. umbered cables 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 evaporator inlet with thermo stat control for up to 4 levels and integral proportional fan speed control with DCPX UL 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 operation with local or remote control Machine status display 1 alarms sumary 2 ON OFF compressors Display of the following parameters 1 water inlet temperature 2 accumulator temperature 3 water outlet temperature 4 5 high pressure 6 low pressure 7 waiting time for restart 8 alarms visualisation For further information refer to the user manual 6 ACCESSORIES 6 1 MECHANICAL ACCESSORIES
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