Technical Manual - Olympic International
Contents
1. psi kPa 44 300 1 NRL 280 36 250 NRL 300 NRL 330 m 3 35 A NRL 500 lt YY NRL 550 I 22 150 5 600 vi 5 6 NRL 650 NRL 700 15 100 1 7 NRL 750 7 50 2 5 4 6 7 0 0 0 5000 10000 15000 20000 25000 30000 35000 40000 I h 0 22 44 66 88 110 132 154 176 gpm WATER FLOW RATE 13 2 CHILLER MODE USEFUL HEADS 575 3 60 psi kPa 44 300 1 nari 280 36 250 NRL 300 NRL 330 m in 3 NRL 500 4 NRL 550 22 150 gt 5 600 A 5 6 NRL 650 NRL 700 15 100 1 7 NRL 750 7 50 3 4 6 7 0 0 0 5000 10000 15000 20000 25000 30000 35000 40000 I h 0 22 44 66 88 110 132 154 176 gpm WATER FLOW RATE 22 13 01 5641350 00 NRL free cooling 0280 0750 60Hz 13 3 FREE COOLING MODE USEFUL HEADS 230 460 3 60 psi 44 36 29 22 USEFUL HEADS 15 kPa 300 250 200 150 100 50 0 02. EU end 19 11 Free cooling functioning corrective factors 20 11 1 For At different from the rated 20 11 2 Fouling factors 20 4 13 01 5641350 00 NRL free cooling 0280 0750 60Hz 13 01 5641350 00 5 Standards and Directives respected on designing and constructing the unit PROTECTION RATING 1 IP 24 ACOUSTIC PART 1 ISO DIS 9614 2 INTENSIMETRIC METHOD 2 SOUND POWER EN ISO 9614 2 3 SOUND PRESSURE EN ISO 3744 REFRIGERANT GAS This unit contains fluoride gases with greenhouse effect covered by the Kyoto Protocol Maintenance and disposal must only be performed by qualified staff STANDARD UL 1995 Heating and cooling equipment ANSI NFPA Standard 70 National Electrical code N E C CSA C 22 1 C 22 2 Safety Standard Electrical Installation 1 DESCRIPTION AND CHOCE OF 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 capaci ty 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 a
3. 11 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 all numbered cables DOOR BLOCK DISCONNECTING SWITCH IT is possible to access the electrical panel by di sconnecting 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 compressor protection thermomagnetic switch fan protection thermo magnetic switch auxiliary protection thermoma gnetic switch discharge gas temperature control thermostat CONTROL KEYPAD Provides full control functions For a detailed description refer to the user manual 12 NRL free cooling 0280 0750 60Hz 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
4. r st F CN CGN CN CN CN e m e oe oe sb SE ST STE ST LO Ln Ln Ln LO Ln O O Thermostatic valve Y gt Je Thermostatic valve gt lt Thermostatic valve X gt Temperature of the water produced EVAPORATOR Acceptable maximum temperature Acceptable minimum temperature WATER SIDE Acceptable maximum pressure Hydarulic circuit safety valve only in version with storage tank or with pump bar PSI C F High pressure Low pressure side side 45 653 30 435 120 248 51 131 30 22 30 22 Calibrated at 6 87 bar PSI and with piped discharge which intervents by discharging overpressure if abnormal work pressure occur 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 started with external air 15 C 5 F and water inlet 18 20 C 68 F Operate in such conditions is permit ted 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 ATTENTION Contact our technical sales depart ment if the unit needs to operated outside the operating limits system utilities until the conditions that allow the unit to work within the permitted operation limits are achieved 13 01 5641350 00 NRL free cooling 0280 0750 60Hz 10 CORRECTION FACTORS 10 1 IN
5. 14 2 50 5 C 23 F E 2 00 0 C 32F she p 1 50 has F 10 C 50 F 1 00 j Ene eg sys ara 15 C 59 F a 0 50 0 00 10 8 6 4 2 0 2 4 6 8 10 12 141516 18 20 22 54 26 28 14 17 6 919 248 284 32 356 392 428 464 536 57259 608 644 68 71 6 752 788 82 4 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 10 C 18 F Cooling capacity correction factors 1 03 Input power correction factors 1 02 FOULING FACTOR K M2 KW 0 018 0 05 0 1 Cooling capacity correction factors 0 967 Input power correction factors 13 01 5641350 00 NRL free cooling 0280 0750 60Hz 12 TOTAL PRESSURE DROPS 12 1 CHILLER FUNCTION PRESSURE DROP Inlet temperature 53 6 F 12 C psi kPa Outlet temperature 44 6 F 7 C Outside air temperature 05 F 35 C 36 250 Average water temperature 50 F 10 C 1 280 29 200 For temperatures other than 50 F 10 to use the 2 NRL 300
6. inhibits functioning of compressor if abnormal work pressure occurs HIGH PRESSURE TRANSDUCER Placed on high pressure side of cooling circuit signals the work pressure to control board gene rating a pre warning in case abnormal pressure occurs 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 EVAPORATOR ANTIFREEZE HEATING ELEMENT Its operation is commanded by the antifreeze probe located in the plate evaporator It is activated when the water temperature is 3 C and deactivated when the water tempe rature is 5 C The dedicated software in the regulation card manages the heater SAFETY VALVE Equipped with a piped discharger and intervenes by discharges the over pressure in case of anoma lous pressures Set at 45 bar on the branch HP Set at 30 bar on the branch LP 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 PANEL CONTROL AND POWER Electric board in compliance with standards EN 60204 1 IEC 204 1 complete with
7. permanent alarms memory autostart after voltage drop multi lingual messages operation with local or remote control Machine status display 2 alarms sumary ON OFF compressors Display of the following parameters 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 13 01 5641350 00 NRL free cooling 0280 0750 60Hz 6 ACCESSORIES 6 1 MECHANICAL ACCESSORIES VT 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 13 01 5641350 00 AERWEB300 6G Web server to monitor and remote control max 6 units in RS485 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
8. table of correction factors 4 NRL 330 e 22 150 2 3 3 NRL 350 O d NRL 500 4 NRL 550 N 15 190 5 600 NRL 650 20 NRL 700 7 NRL 750 0 0 g N N UJ 9 15 e e e e e e e e e e e e e e e e o o o o o o o o 22 44 66 88 110 132 154 176 198 spm WATER FLOW RATE Average water temperature F C 41 5 50 10 59 15 68 20 86 30 104 40 122 50 Coefficients 102 1 098 097 095 093 0 91 12 2 FREE COOLING FUNCTION PRESSURE DROP Inlet water temperature 45 C 59 F psi kPa Outside air temperature 2 C 35 6 F 58 400 Rated water flow Compressors off 51 350 1 nai 280 44 300 NRL 300 NRL 330 36 250 3 NRL 350 O 29 200 NRL 500 5 NRL 550 Y Y 22 150 5 wRL600 NRL 650 15 100 6 NRL 700 7 50 7 NRL 750 0 0 Average water temperature F C 41 5 50 10 59 15 68 20 86 30 104 40 122 50 102 1 098 0 97 095 093 Coefficients 13 01 5641350 00 N N w w B A e e e e e e e e e e e e e e e e e e e e e e e e e 22 44 66 88 110 132 154 176 198 0 91 WATER FLOW RATE I h gpm 21 NRL free cooling 0280 0750 60Hz 13 USEFUL HEADS 13 1 CHILLER MODE USEFUL HEADS 230 460 3 60
9. 14 5 MP1 A 460V 3 60Hz 3 9 5 2 5 2 5 8 5 8 5 8 72 A 575V 3 60Hz 2 5 3 5 3 5 4 6 4 6 4 6 5 8 A 220V 3 60Hz 7 8 7 8 7 8 7 8 10 4 10 4 11 5 11 5 11 5 14 5 MP2 A 460V 3 60Hz 3 9 3 9 3 9 3 9 5 2 5 8 5 8 5 8 72 A 575V 3 60Hz 25 46 46 58 19 3 PUMP THERMOMAGNETIC 04 P4 COMPRESSOR POWER THERMOMAGNETIC SUPPLY NRL 280 NRL300 NRL330 NRL350 NRL 500 NRL550 NRL600 NRL650 NRL700 NRL 750 7 8 MP2A gt 5 8 5 8 7 2 4 6 4 6 5 8 220V 3 60Hz 7 8 7 8 7 8 10 4 10 4 11 5 11 5 11 5 14 5 MP1 A 460V 3 60Hz 3 9 3 9 3 9 7 5 8 5 8 5 8 7 2 4 6 5 8 A 220V 3 60Hz 7 8 7 8 7 8 7 8 10 4 10 4 11 5 11 5 11 5 14 5 MP1A A 460V 3 60Hz 3 9 3 9 3 9 5 2 5 8 5 8 5 8 72 A 575V 3 60Hz 4 6 5 8 MP2 5 8 72 4 6 5 8 460V 3 60Hz 3 9 3 9 3 9 52 2 8 575V 3 60Hz 2 5 25 2 25 3 5 5 6 gt 5 5 3 4 13_01 5641350_00 29 19 4 FAN THERMOMAGNETIC 220V 3 60Hz NRL free cooling 0280 0750 60Hz COMPRESSOR MTV1 A 8 8 7 2 7 2 MTV1A A 8 8 72 72 MTV1B A 1 8 8 MTV1D A MTV2B 2 8 8 10 10 MTV2D A 19 5 FAN THERMOMAGNETIC 460V 3 60Hz COMPRESSOR MTV1A 10 10 4 2 4 2 4 2 4 2 MTV1B A 1 8 8 10 10 pp MTVID MTV2A 10 10 MTV2B A 2 8 8 10 10 MTV2D oo 19 6 FAN THERMOMAGNETIC 575V 3 60Hz COMPRESSOR MT
10. 580 40 580 40 580 40 580 40 580 40 580 40 580 40 580 40 HIGH PRESSURE TRANSDUCER TAP psi bar 566 39 566 39 566 39 566 39 566 39 566 39 566 39 566 39 566 39 566 39 LOW PRESSURE TRANSDUCER TBP psi bar 29 2 29 2 29 2 29 2 29 2 29 2 29 2 2972 29 2 29 2 COOLING CIRCUIT SAFETY VALVES AP 653 45 653 45 653 45 653 45 653 45 653 45 653 45 653 45 653 45 653 45 28 13 01 5641350 00 NRL free cooling 0280 0750 60Hz 19 1 COMPRESSOR THERMOMAGNETIC COMPRESSOR POWER MTC1 A 220V 3 60Hz 48 0 54 5 35 0 48 0 48 0 54 5 59 0 MTC1A A 220V 3 60Hz f 35 0 48 0 48 0 54 5 54 5 54 5 MTC2 A 220V 3 60Hz 35 0 48 0 54 5 54 5 48 0 48 0 54 5 59 0 MTC2A A 220V 3 60Hz 48 0 54 5 54 5 54 5 1 460V 3 60Hz 23 0 26 0 16 0 23 0 23 0 26 0 30 4 MTC1A A 460V 3 60Hz 16 0 23 0 26 0 26 0 26 0 MTC2 A 460V 3 60Hz 16 0 23 0 26 0 26 0 26 0 23 0 23 0 26 0 30 4 A _ _ d 1230 260 260 260 MIC A 27 5 MTC1A A gt s 14 5 19 0 23 0 23 0 23 0 MTC2 A 575V 3 60Hz 19 0 23 0 23 0 23 0 19 0 19 0 23 0 27 5 MTC2A A 575V 3 60Hz 1 19 0 23 0 23 0 23 0 19 2 PUMP THERMOMAGNETIC 03 P3 COMPRESSOR POWER THERMOMAGNETIC SUPPLY NRL 280 NRL 300 NRL330 NRL350 NRL500 NRL550 NRL600 NRL650 NRL 700 NRL 750 7 8 A 220V 3 60Hz 10 4 11 5 11 5
11. 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 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 week 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 13 7 TECHNICAL DATA vers F CHILLER FUNCTION Model NRL free cooling 0280 0750 60Hz 0280 0300 0330 0350 0500 0550 0600 0650 0700 0750 15 18 17 44 21 39 34 06 37 91 41 17 46 24 Total pressure drop Useful head with HIGH PUMP ENERGY INDICES BTU Wat Alls BTU Wat Alls PROTECTION RATING BTU Wat 11 82 11 89 11 48 12 56 12 19 11 87 11 51 IP ELECTRICAL DATA 24 24 24 24 24 24 24 24 24 Total input current 1 Model WITHOUT PUMP 71
12. exceed a level differen ce of 180 45ft 55m 2 Check that the lowest user can sustain the global pressure acting at that point NRL n Compressor 1 I KW 2 I KW 0280 0300 0330 0350 14 0500 0550 10 0600 0650 0700 0750 13 01 5641350 00 Key 1 Minimum water content Minimum water content in the case of process applications or applications with low outside 2 temperatures and low load Regolation on the temperature outlet water project At less than 5 C 25 17 PART LOAD COOLING AHRI CONDITIONS Outlet water temperature Flow rate External temperature 6 7 C 44 6 F 0 0431 5 per kW 35 C 95 F LEVELS OF POWER COOLING CAPACITY 1 2 3 4 0280 55 100 0300 55 100 0330 95 100 0350 55 100 0500 40 75 100 0550 36 68 100 z 0600 25 50 75 100 0650 28 50 78 100 0700 25 50 75 100 0750 27 53 77 100 POWER INPUT 1 2 3 4 0280 45 100 0300 45 100 0330 45 100 0350 45 100 0500 30 65 100 0550 26 58 100 0600 20 45 70 100 0650 23 45 73 100 0700 20 45 70 100 0750 23 47 73 100 26 NRL free cooling 0280 0750 60Hz 13 01 5641350 00 NRL free cooling 0280 0750 60Hz 18 SOUND DATA Sound power Aermec determines the sound power value on the basis of measurements taken in accordance with standard 9614 2 So
13. 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 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 24 NRL free cooling 0280 0750 60Hz Correction factors Ba AP 1 210 AP AP 3 AP 1 60 AP 5 140 1390 1 30 dur 1 280 Qw 1 20 1180 Qw 2 1110 1 00 Z Ph 0 99 0 990 _ J I 0 975 Outside air temperature KEY Pc Pe Ph AP 1 AP 2 AP 3 AP 4 AP 5 Qw 1 Qw 2 A ro H o 0 5 10 45 20 68 30 35 40 45 50 55 Glycol Processed water temperature Corrective factors for cooling capacity Corrective factors of the input power Corrective factors of heating capacity Correction factors
14. yes Solenoid valve of hot gas injecton yes yes yes By pass valve of hot gas no no yes Exchanger EV EV CN yes yes yes Exchanger desuperheater no yes yes Exchanger glycol free no yes F VERSION Hydraulic circuit Version F 00 0280 0300 0330 0350 0500 0550 0600 0650 0700 0750 Water filter yes Flow switch yes Air vent yes Hydraulic circuit Version P1 P4 0280 0300 0330 0350 0500 0550 0600 0650 0700 0750 Flow switch yes yes yes yes yes yes yes yes yes yes Safety valve yes Air vent yes yes yes yes yes yes yes yes yes Pump yes yes yes yes yes yes yes yes yes yes Expansion tank yes yes yes yes yes yes yes yes yes yes Hydraulic circuit 0750 Water filter yes Flow switch yes Safety valve yes Air vent yes Pump yes Expansion tank yes Storage tank yes VERSION WITH D DESUPERHEATER hydraulic circuit Version F with D 0280 0300 0330 0350 0500 0550 0600 0650 0700 0750 Water filter vm ye IE no Flow switch no Exchanger desuperheater yes yes yes yes hydraulic circuit Storage tank version with D 0280 0300 0330 0350 0500 0550 0600 0650 0700 0750 Water filter yes yes yes Differential pressure switch no no no Flow switch yes yes yes Exchanger desuperheater yes yes yes Safety valve yes Air vent yes Pump yes Expansion tan
15. 30 93 40 52 00 Eug Cape bebe hae pP 29 10 34 20 42 40 RECOM FUSE COOLING AHRI STANDARD CONDITIONS Outlet water temperature 6 7 C 44 6 F Flow rate 0 0431 5 per kW External temperature 35 95 F data refered to no pump version 14 AHRI conditions leaving water 6 7 C 44 6 F flow rate 0 043 1 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 13 01 5641350 00 NRL free cooling 0280 0750 60Hz Model WITH HIGH HEAD PUMP 0280 0300 0330 0350 0500 0550 0600 0650 0700 0750 38 37 383 464 504 549 NC 8 t TE 210 220 239 245 288 149 138 175 190 218 RECOM FUSE SCROLL COMPRESSORS 190 235 275 287 104 111 93 117 109 126 119 333 349 125 150 131 145 300 150 125 Quantity circuits n n 2 2 2 2 2 2 2 2 3 2 3 2 4 2 4 2 4 2 4 2 HEAT EXCHANGER SYSTEM SIDE Exchanger capacity 08 11 11 13 17 17 22 29 29 34 Hydraulicconnenction ra 2 2 ra 2 zn 2 2 24 COOLING AHRI STANDARD CONDITIONS AHRI conditions leaving water 6 7 C 44 6 F Outlet wat
16. 5000 10000 15000 20000 25000 30000 35000 40000 0 22 44 66 88 110 132 154 176 WATER FLOW RATE 13 4 FREE COOLING MODE USEFUL HEADS 575 3 60 44 36 29 22 USEFUL HEADS 15 kPa 300 250 200 150 100 50 0 0 5000 10000 15000 20000 25000 30000 35000 40000 0 22 44 66 88 110 132 154 176 WATER FLOW RATE 13 01 5641350 00 NRL 280 NRL 300 NRL 330 NRL 350 NRL 500 NRL 550 NRL 600 NRL 650 NRL 700 99090 NRL 750 gpm NRL 280 NRL 300 NRL 330 NRL 350 NRL 500 NRL 550 NRL 600 NRL 650 NRL 700 NRL 750 O 9 9 99 I h gpm 23 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 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 c
17. 6 0 5 95 6 61 6 61 6 61 13 23 13 23 2 7 2 7 3 0 3 0 j 3 0 6 0 6 0 6 0 5 95 5 95 6 61 6 61 13 23 13 23 13 23 _ 63 63 63 74 74 74 74 77 Depth i 116 116 156 156 171 923 937 1450 1470 1789 2037 2066 3197 3241 3946 R410A Gas refrigerant Weight when empty COOLING AHRI STANDARD CONDITIONS AHRI conditions leaving water 6 7 C 44 6 F Outlet water temperature 6 7 C 44 6 F flow rate 0 043 1 5 per kW full load Flow rate 0 0431 5 per kW Load 10096 air 35 C 95 F External temperature 35 C 95 F Load 75 air 26 7 C 80 06 F Load 50 air 18 3 C 64 94 F data refered to no pump version Load 25 air 12 8 55 04 F 16 13 01 5641350 00 NRL free cooling 0280 0750 60Hz 8 TECHNICAL DATA vers F FREE COOLING MODE Model 0280 0300 0330 0350 0500 0550 osoo 0650 0700 0750 Tons ee 18 48 19 39 25 19 29 82 30 68 32 71 didi ot ae ARS Total power input 2 06 2 58 Water flow rate Total pressure drop Alls 230V 460V 230V 460V Useful head with HIGH PUMP ENERGY INDICES EER PROTECTION RATING IP i 24 24 24 24 24 24 24 24 24 24 ELECTRICAL DATA Total input current 1 SOUND DATA Sound pressure dB A Sound power 5 2 L m L s 8 L s 89 _ FREE COOLING MODE data refered to
18. AERMEC or air conditioning 9 939292 TECHNICAL MANUAL CHILLER NRL free cooling HIGH EFFICENCY e POWER SUPPLY 60Hz 280 7 5 COMPANY QUALITY SYSTEM 4 Ge a w b I CERTIFIED www ahridirectery drg ISO 9001 2008 Cert n 0128 a E e Air Cooled Chillers CIS AHAI Standard 550 590 5 AERMEC S P A NRL free cooling 0280 0750 60Hz Dear Customer Thank you for choosing an AERMEC product This product is the result of many years of expe rience and in depth engineering research and it is built using top quality materials and advanced technologies In addition the CE mark guarantees that our appliances fully comply with the requirements of the European Machinery Directive in terms of safety We constantly monitor the quality level of our products and as a result they are synonymous with Safety Quality and Reliability Product data may be subject to modifications dee med necessary for improving the product without the obligation to give prior notice 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 13 01 5641350 00 NRL free cooling 0280 0750 60Hz INDEX 1 Description and ch
19. ENTS OF THE COOLING CAPACTIY 1 6 1 5 1 4 1 3 1 2 1 1 0 9 0 8 44 C 111 2 F 0 7 0 6 0 5 0 4 Correction coefficients of the cooling capacity Cf Processed water temperature 44 8 20 C 68 F 25 C 77 F 30 C 86 F 35 C 95 F 2 w x w 2 o 4 2 CORRECTION COEFHCIENTS OF THE INPUT POWER IN COOLING MODE 14 1 3 1 2 44 C 111 2 F 1 1 C 104 F 0 9 0 8 x gt 4 35 C 95 F D 30 86 25 C 77 F g 20 C 68 F o 42 5 O 0 7 0 6 Correction coefficients of the input power Ca Processed water temperature 44 6 B 4 2 0 2 4 6 6 7 8 10 AT DIFFFERENT FROM THE RATED VALUE AT 5 C 10 01 F 3 C 5 40 5 56 C 10 01 F 8 C 14 40 10 C 18 F Cooling capacity correction factors 1 03 Input power correction factors 1 02 FOULING FACTOR K M2 KW 0 1 Cooling capacity correction factors 0 967 Input power correction factors 19 11 The maximum cooling capacity yielded when functioning is completely in free cooling mode i e all compressors are off is obtained by multiplying the coo
20. O SUPPLY gt SYSTEM 13 01 5641350 00 NRL free cooling 0280 0750 60Hz 5 DESCRIPTION OF THE COMPONENTS 5 1 CHILLER CIRCUIT SCROLL COMPRESSORS High efficiency scroll type hermetic compressors assembled on elastic antivibration supports driven by a 2 pole electric motor with internal thermal protection of the electric heater casing included as standard The heater is automatically powered when the unit stops provided that the unit is kept under tension WATER SIDE HEAT EXCHANGER Of the plate type AISI 316 externally insula ted with closed cell material to reduce thermal dispersion Fitted as standard with antifreeze heater 5 1 1 WATER FEATURES PH 6 8 Electric less than 200 mV cm conductivity 77 E2538 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 SOURCE SIDE HEAT EXCHANGER Made with copper pipes and aluminium louvered fins blocked by mechanical expansion of the pipes Provided with protective grid DESUPERHEATER Unit with AISI 316 heat plate insulated exter nally with closed cell material to reduce heat loss DEHYDRATOR FILTER Hermetic mechanical with cartridges made of ce ramic and hygroscopic material able to withhold impurities and any traces of humidity present in th
21. PUT 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 ATTENZIONE FOR At DIFFERENT FROM 10 01 F 5 56 C Tab 10 2 is used for the correction factors of the cooling capacity and input power of the water con sumption To take into account the soiling of the exchanger apply the relative fouling factors Tab 10 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 043l s 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 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 13 01 5641350 00 CORRECTION COEFHCI
22. V1 A 8 8 10 10 33 3 7 37 37 3 7 3 7 MTV1A A 8 8 10 10 37 37 3 7 37 MTV1B 1 10 10 MTV1D A MTV2 A 8 8 3 7 3 7 MTV2A 8 8 MTV2B A 2 8 8 f i MTV2D A 30 13 01 5641350 00 NRL free cooling 0280 0750 60Hz 13 01 5641350 00 31 AERMEC S p A 37040 Bevilacqua VR Italy Via Roma 996 Tel 39 0442 633111 Telefax 0442 93730 39 0442 93566 www aermec com info aermec com air conditioning 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 AERMEC aE COMPANY QUALITY SYSTEM ISO 9001 2008 Cert n 0128 AERMEC S P A
23. alculated 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 both glycol percentage and relative correc tion coefficients 14 1 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
24. e cooling circuit ONE WAY VALVES Allows the passage of the refrigerant in just one direction THERMOSTATIC VALVE The valve with external equaliser positioned at the evaporator inlet modulates the flow of gas to the evaporator according to the heat load in order to ensure a correct heating level 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 Used to check the refrigerant gas load and the eventual presence of humidity in the cooling circuit 13 01 5641350 00 TAPS Present in the liquid and discharge lines and allow to intercept the refrigerant in case of extra ordinary maintenance 5 2 FRAME AND FANS SUPPORT FRAME Load bearing structure Made of hot galvanised steel sheet of a suitable thickness varnished with polyester powders able to resist atmospheric agents over time FAN UNIT Axial fan balanced statically and dynamically The electric 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 COMPONENTS 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 3 WAY VALVE This is an electric servo contro
25. er temperature 6 7 C 44 6 F flow rate 0 043 1 5 per kW full load Flow rate 0 0431 5 per kW Load 100 air 35 C 95 F External temperature 35 C 95 F Load 75 air 26 7 C 80 06 F Load 50 air 18 3 C 64 94 F data refered to no pump version Load 25 air 12 8 C 55 04 F 13 01 5641350 00 15 NRL free cooling 0280 0750 60Hz 0280 0300 0330 0350 0500 0550 0600 0650 0700 0750 HYDRONIC GROUP SYSTEM SIDE STORAGE TANK Storage tank capacit 9 79 79 79 79 EXPANSION TANK Expansion tank HIGH HEAD PUMP 7 00 7 00 cou 7 00 10 40 10 40 10 40 40 Pump input current 3 34 _ 494 SAFETY VALVE Safety valve calibration psi 87 87 87 87 87 87 87 87 87 87 103 10 80 146 90 170 20 194 80 199 10 71 30 93 40 52 00 7550 85 10 95 20 40 40 50 49 50 oe 29 10 ELECTRICAL DATA FAN MOTORS Quantit n 6 8 8 2 3 3 3 2 Air flow CFM 14514 18172 18172 23836 37170 36580 36580 36580 230V 6 96 9 28 9 28 P 19 5 19 5 19 5 19 5 Fan input current 460V 6 96 9 28 9 28 11 4 11 4 11 4 11 4 230V 1 56 Fan power input 1 56 1 56 136 554 SOUND DATA Sound pressure Sound 99 90 90 90 j 12 0 13 5 13 5 14 0 21 83 21 83 21 83 21 83 26 46 29 76 29 76 30 86 9 9 9 0 13 5 13 5 14 0 21 83 21 83 29 76 29 76 30 86 2 7 3 0 3 0 3 0 j 6 0
26. 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 av temp 47 5 C 117 5 F NOTE Although the graph arrives at external air temperatures of 40 C F unit operational limits must be considered 13 01 5641350 00 NRL free cooling 0280 0750 60Hz 15 EXPANSION TANK CALIBRATION The standard pressure value for pre charging the ex pansion tank is 1 5 bar and the volume is 25 litres 6 6 gallon Maximum value 6 bar The tank must be calibrated according to the maximum difference in height H of the device see figure according to the formula p calibration bar H 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 If the calibration value obtained from the calculation is lower than 1 5 bar i e for H lt 12 25 maintain the standard calibration 16 MINIMUM WATER CONTENT gt H 1 480 45ft 55m m ONS I A 5 40 19ft 12 25m 5 H 0 5 5 re 5 2 KEY 1 Check that the highest user does not
27. g 0280 0750 60Hz 13 01 5641350 00 NRL free cooling 0280 0750 60Hz 4 PRINCIPLE OF OPERATION SCHEMES 4 1 PRODUCTION OF COLD WATER ONLY THE SYSTEM CN Description exchanger SYSTEM SIDE Operation EVAPORATION Production cold water gt gt exchanger SOURCE SIDE CONDENSATION Heat exchange with the air F a CN Sign exchanger SYSTEM SIDE EVAPORATION FREE COOLING Production cold water Description compressor CN Air side exchange gt gt TEV Thermostatic valve BHE Exchanger plate V3V LN 13 01 5641350 00 three way valve e v H O RETURN SYSTEM CN pom lt lt V3V H O DISCHARGE SYSTEM 4 2 10 COLD WATER PRODUCTION AND THE SYSTEM RECOVERY DESUPERHEATER lt 0 SUPPLY DISCHARGE 0000 NRL free cooling 0280 0750 60Hz 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 changer 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 a H O RETURN SYSTEM V3V H
28. k yes Storage tank yes 13 01 5641350 00 3 CONFIGURATOR 1 2 3 4 5 6 7 0 8 Y X 9 F 10 D 11 A E 12 R S V 13 14 6 7 8 15 16 00 03 04 P3 P4 DESCRIPTION NRL Size 028 030 033 035 050 055 060 065 070 075 Compressors Standard compressor Thermostatic valve Standard mechanical thermostatic valve with produced water up to 39 2 F 4 Mechanical thermostatic valve with produced water from 39 2 F 4 to 42 8 F 6 C 3 Electronic thermostatic valve with produced water up to 39 2 F 4 C Model Free cooling Heat recovery Without recovery units Desuperheater 2 Version High efficiency not available for sizes 028 035 High efficiency silenced version on demand for sizes 050 075 2 Coils Made of aluminium Made of copper Tinned copper Painted aluminium epoxy paint Ventilation Fan speed modulating for condensation control Power supply 230V 3 60Hz with thermomagnetic switches 2 460V 3 60Hz with thermomagnetic switches 575V 3 60Hz with thermomagnetic switches Hydronic kit 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 For lower temperatures contact the office 2 Versions avaible only on demand NRL free coolin
29. ling 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 11 1 FOR At DIFFERENT FROM THE RATED VALUE The performances given by the technical data refer to AHRI standard conditions flow rate 0 0431 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 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 20 Free cooling corrective coefficient Pf FREE COOLING FUNCTIONING CORRECTIVE FACTORS NRL free cooling 0280 0750 60Hz FREE COOLING ONLY FUNCTIONING COOLING CAPACITY CORRECTIVE C OEFHC IENTS 4 00 20 C 4 F 3 50 15 5 3 00 10
30. lled 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 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 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 5 5 SAFETY AND CONTROL COMPONENTS HIGH PRESSURE SWITCH With fixed calibration placed on high pressure side of cooling circuit
31. llows 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 requi red 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 temperature of the system water NRL free cooling 0280 0750 60Hz Models 1 free cooling The versions can be in different set ups at the same time in order to satisfy a wide range of plant enginee ring solutions 1 HIGH EFFICIENCY 2 SILENCED HIGH EFFICIENCY 3 D WITH DESUPERHEATER The units with desuperheater D are not available in the versions 1 YD 2 XD 13 01 5641350 00 NRL free cooling 0280 0750 60Hz 2 CHECK LIST Ciruit Components Cooling circuit Model F B with D Resistance carter compressor yes yes yes High pressure switch yes yes yes Low pressure switch no no no High pressure trasducer yes yes yes Low pressure trasducer yes yes
32. no pump version AHRI STANDARD CONDITIONS AHRI conditions leaving water 6 7 C 44 6 F Inlet water temperature 15 C 59 F flow rate 0 043 1 5 per kW full load Outside air temperature 2 C 35 6 F Load 100 air 35 C 95 F Rated water flow Load 75 air 26 7 C 80 06 F Compressors off Load 50 air 18 3 64 94 F Load 25 air 12 8 C 55 04 F 13 01 5641350 00 17 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 Wind breaks should be implemented if the unit is installed in particularly windy areas to prevent a malfunction of the unit 9 1 DESIGN SPECIFICATIONS REFRIGERANT SIDE Acceptable maximum pressure NRL free cooling 0280 0750 60Hz F 122 113 104 95 to 86 77 68 g 59 o 50 J 32 accessonyEt 4 n 23 water glycoled 14 5 O O a m m t eS ee C O OQ O s N O O O GN O O O GN OQ O N st WON m 5 O m
33. oce of unit nee 6 12 Total pressure drops ILI 21 12 1 Chiller function pressure drop eene 21 Check A 7 122 Free cooling function pressure drop 21 3 8 19 Usefulheads uses 22 13 1 Chiller mode useful heads 230 460 3 60 22 4 Principle of operation 0 0 2 500 n 9 13 2 Chiller mode useful heads 575 3 60 22 4 1 Production of cold water only the system 9 13 3 Free cooling mode useful heads 230 460 3 60 23 4 2 Cold water production and the system recovery desuperheater 10 13 4 Free cooling mode useful heads 575 3 60 TID IUIS TIL TT IO 23 5 Description of the components eT Se 11 14 Ethylene glycol solutions ea 08 010100 24 5 1 Chiller circuit 11 14 1 How to interpret glycol curves 24 5 2 Frame and fans 11 E 5 3 Hydraulic components standard version 11 15 Expansion tank calibration A 25 5 4 Hydraulic components configurable version 11 5 5 Safety and control components E 11 16 Minimum
34. und pressure Sound pressure in free field on a reflecting plane directional factor Q 2 in accordance with standard ISO 3744 13 01 5641350 00 Total sound levels Octave band Hz NRL 2 Pot Pressure 125 250 500 1000 2000 4000 8000 98 Sound power by central band frequency dB A 10m 1m 280 FE 74 42 54 72 2 61 1 66 4 63 5 61 0 50 0 43 7 300 FE 75 43 55 73 2 62 1 67 4 64 5 62 0 51 0 44 7 330 64 0 53 3 46 8 350 65 0 55 0 47 1 500 70 8 75 1 64 8 550 70 9 73 0 62 0 600 71 6 75 6 65 1 650 73 6 75 7 62 2 700 72 9 74 9 78 3 81 7 75 5 62 4 750 73 9 75 9 793 82 7 63 4 500 FE 77 45 57 63 0 66 9 70 3 70 7 70 4 67 3 62 9 550 FE 77 45 57 63 0 66 9 70 3 70 7 70 4 67 3 62 9 600 67 1 63 1 650 68 6 63 0 700 73 4 66 9 750 72 3 67 8 27 NRL free cooling 0280 0750 60Hz 19 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 F ANTI FREEZE INTERVENTION Min Max Default Intervention temperature of the anti freeze alarm on the EV side water outlet temperature 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 18 5 C 10 HIGH PRESSURE PRESSURE SWITCH MANUAL REARM PA psi bar 580 40 580 40
35. water content 100 0 6 810 0 0 N14 0 66 0 25 5 6 Electrical panel control and power 12 17 sssqp 26 6 7 URDU 13 6 1 Mechanical accessories LEE 13 18 Sound data 27 6 2 Electrical accesories 13 19 Control and safety parameters calibration 28 7 Technical data vers F chiller 14 191 29 19 2 Pump thermomagnetic 03 p3 29 8 Technical data vers F free cooling mode E 17 19 3 Pump thermomagnetic 04 p4 RETO TO RUN T M 29 19 4 Fan thermomagnetic 220v 3 60hz 30 9 Operating mits oe 18 19 5 Fan thermomagnetic 460 3 60 2 30 9 1 Design INC ORIS Goes dicc 18 19 6 Fanthermomagnetic 575 3 60 1 30 10 Correction factors UR I EST 19 10 1 Input power and cooling capacity high efficiency version 19 10 2 For At different from the rated 19 10 3 Fouling CLO
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