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CRW-EH 2260÷21870

A CLASS energy efficiency watercooled liquid Chillers with (Inverter) Screw compressors and shell and tube exchangers

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The liquid chillers of the CRW-EH 2260÷21870 series, with HFO-R1234ze refrigerant, are specifically designed for big size data centres. These units are characterized by an high efficiency, in A CLASS, with EER higher than 5,05 thanks to the dedicated technical solutions as shell and tube exchangers and Screw compressors.
The latest generation refrigerant HFO-R1234ze, with GWP<1 (Global Warming Potential), is the most environmentally sustainable refrigerant on the market, and meets the strictest international environmental regulations.
Units are equipped with latest generation Screw compressors, shell and tube exchangers and connections for condensation with tower water or well water or with a Dry-Cooler. Furthermore, they have a series of accessories which are factory fitted or supplied separately. Designed and produced to optimize the layout of each component so as to make any necessary maintenance operations more convenient, these units have an essential and compact structure intended for indoor installation. The units can be equipped with Inverter control on one or on both the Screw compressors. The solution with double Inverter allows, in addition to the above described, to increase the power efficiency of the unit in the same size, adapting to the different needs and solutions.


  • CRW-EH - Cooling only
  • CRW-EH/SSL - Super silenced cooling only


  • Structure with supporting frame, made of galvanised sheet metal with additional protection provided by polyester powder coating.
  • Screw compressors with built-in oil separator, suction filter, crankcase heater, oil sight glass, thermal protection and stepless capacity steps.
  • Shell and tube type condenser, with easily removable cast iron heads to enable access for maintenance operations. Each cooling circuit is supplied with an independent condenser. Water connections for cooling tower and Dry-Cooler operation; on request for well water.
  • Shell and tube type evaporator, with one or two independent circuits on the refrigerant side and one on the water side, complete with water differential pressure switch.
  • Cooling circuit shut-off valves on discharge and liquid line.
  • Electronic expansion valve.
  • Electronic high and low pressure gauges.
  • HFO-R1234ze refrigerant.
  • Electrical board includes: main switch with door safety interlock, fuses, thermal protection relays for compressors.
  • Microprocessor control and regulation system.

Factory fitted accessories

  • IM Automatic circuit breakers
  • DPS Double power supply
  • II Inverter on one compressor and soft start for other compressors
  • ID Inverter on all compressors
  • SS Soft start
  • WM Web Monitoring - Wireless remote monitoring (GPRS/EDGE/3G/TCP-IP)
  • IS Modbus RTU protocol, RS485 serial interface
  • IST Modbus TCP/IP protocol, Ethernet port
  • ISB BACnet MSTP protocol, RS485 serial interface
  • ISBT BACnet TCP/IP protocol, Ethernet port
  • ISL LonWorks protocol, FTT-10 serial interface
  • ISS SNMP protocol, Ethernet port
  • IAV Remote set-point, 0-10 V signal
  • IAA Remote set-point, 4-20 mA signal
  • IAS Remote signal for second set-point activation
  • IDL Demand limit from digital input
  • CP Potential free contacts

Loose accessories

  • MN High and low pressure gauges
  • CR Remote control panel
  • PV3 3-Way electronic pressostatic valve
  • AG Rubber shock absorbers
  • AM Spring shock absorbers
  • FL Flow switch
CoolingCooling capacity (1)kW278369446520581664779876103311661380152117551964
Absorbed power (1)kW4558678290102119134157177226247281310
EER (1)6,186,366,666,346,466,516,556,546,586,596,116,166,256,34
Cooling (EN14511)Cooling capacity (1)kW277367444518579662776872102911621375151417461953
Absorbed power (1)kW4660698492104122138161181231254290321
EER (1)6,026,126,436,176,296,376,366,326,396,425,955,966,026,08
SEPR (2)7,387,597,708,058,088,038,098,008,068,078,108,078,228,55
Refrigerant circuits22222222222222
Capacity stepsSteplessSteplessSteplessSteplessSteplessSteplessSteplessSteplessSteplessSteplessSteplessSteplessSteplessStepless
EvaporatorWater flowl/s13,2817,6321,3124,8427,7631,7237,2241,8549,3555,7165,9372,6783,8593,84
Pressure dropskPa5152595545445064555455698190
Water connectionsDN125150150150200200200200200250250250250250
CondenserWater flowl/s15,5320,5024,6528,9132,2536,7943,1448,4957,1464,5077,1684,9597,80109
Pressure dropskPa2338474949484447515151514844
Water connectionsDN808080808080100100100100125125125150
Electrical characteristicsPower supplyV/Ph/Hz400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50
Max. running currentA144190220260290334384436489549701761873961
Max. starting currentA1992573183734205044925766927821144117413721416
Sound pressureSTD version (3)dB(A)7676767676767677787980808182
SSL version (3)dB(A)7272727272727273747576767778
WeightsTransport weightkg214024452640286030903230418045605205567069507080906010050
Operating weightkg2340270028903160347036204670520059906600789080401022011450




  • 1 Chilled water from 18 to 13 °C, water temperature at the condenser from 30 to 35 °C.
  • 2 Efficienza energetica stagionale di raffreddamento di processo ad alta temperatura secondo il Regolamento UE n. 2016/2281.
  • 3 Sound pressure level measured in free field conditions at 1 m from the unit. According to ISO 3744.
  • N.B. (1) Weights of SSL version are specified on technical brochure.