CWW/K 726÷36012

Watercooled liquid Chillers and Heat Pumps with Scroll compressors and shell and tube exchangers

SOLO_FREDDO.png caldo_e_freddo1.png COMPRESSORE_SCROLL111.png SCAMBIATORE_FASCIO1.png R410A1.png icon_refrigerant_R452B.png icon_refrigerant_R454B.png

The CWW/K 726÷36012 series liquid Chillers and Heat Pumps, with R410A refrigerant, are designed for medium and large domestic or industrial systems which require medium-high power, space-saving units and quiet operation. These units are ideal for indoor installation and, equipped with a self contained structure, they reduce the overall dimensions to a minimum while at the same time making installation and maintenance operations easier.
The units are characterized by multi-compressor design on double cooling circuit, to reach high energy performances, reduction of current at start-up, elimination of inertial tanks and excellent silent functioning. The use of components built in large series makes them highly reliable and the management of a high number of compressors allows increased life span with reduction of machine stopping risks and easier maintenance operations. A wide range of accessories, factory fitted or supplied separately, complete the outstanding versatility and functionality of the series.
The units 726÷1128 are compliant to the ErP Regulation; the units 1208÷36012 are not compliant to the ErP Regulation.
On request, units can be supplied with R452B or R454B refrigerant.


  • CWW/K - Cooling only
  • CWW/K/WP - Reversible Heat Pump
  • CWW/K/SSL - Super silenced cooling only
  • CWW/K/WP/SSL - Super silenced reversible Heat Pump

Power range

  • 225-1.3 kW
  • 64.0-357 Ton


  • Structure with supporting frame, made of galvanised sheet metal with additional protection provided by polyester powder coating.
  • Scroll compressors with oil sight glass, internal overheat protection and crankcase heater.
  • Shell and tube type condenser with two independent circuits on the refrigerant side and one on the water side.
  • Shell and tube evaporator with two independent circuits on the refrigerant side and one on the water side, complete with water differential pressure switch.
  • Cooling circuit shut-off valve on liquid line in 1048÷36012 models.
  • Electronic expansion valve.
  • Electronic high and low pressure gauges.
  • R410A refrigerant. On request R452B or R454B refrigerant.
  • Electrical board includes: main switch with door safety interlock, fuses, thermal protection relays for compressors, interface relay and terminals for external connections.
  • Microprocessor control and regulation system.

Factory fitted accessories

  • SL Unit silencement
  • RFM Cooling circuit shut-off valve on discharge line
  • BT Low water temperature kit
  • HR Desuperheater
  • HRT Total heat recovery
  • FE Antifreeze heater for evaporator
  • SS Soft start
  • 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

Loose accessories

  • MN High and low pressure gauges
  • CR Remote control panel
  • PV2 2-Way electronic pressostatic valve
  • PV3 3-Way electronic pressostatic valve
  • AG Rubber shock absorbers
  • AM Spring shock absorbers
  • FL Flow switch
CoolingCooling capacity (1)kW225248271302343375422464511579628710801913103511521254
Absorbed power (1)kW53576472798894107117132146159181208233264290
EER (1)4,254,354,234,194,344,264,494,344,374,394,304,474,434,394,444,364,32
Cooling (EN14511)Cooling capacity (1)kW225248271302343375422464511579628710801913103511521254
Absorbed power (1)kW53576472798894107117132146160182208233265291
EER (1)4,254,354,234,194,344,264,494,344,374,394,304,444,404,394,444,354,31
SEER (2)5,315,525,525,675,585,816,266,036,196,116,046,026,256,226,296,226,16
Energy Efficiency (2)%204213213219215224242233240236234233242241244241238
HeatingHeating capacity (3)kW29131734538643447453458664273179189110051135128014191546
Absorbed power (3)kW67748191102113118139147168183206231264292325361
COP (3)4,344,284,264,244,254,194,534,224,374,354,324,334,354,304,384,374,28
Heating (EN14511)Heating capacity (3)kW29331934638743647653658964473479489410091140128714251554
Absorbed power (3)kW69778393105116121143151173189212238273303335373
COP (3)4,254,144,174,164,154,104,434,124,264,244,204,224,244,184,254,254,17
SCOP (4)4,935,205,134,975,265,045,285,315,164,965,924,346,034,766,074,995,82
Energy Efficiency (4)%189200197191202194203204198190229166233182235192225
Refrigerant circuits22222222222222222
Capacity steps6666888881010101010101010
EvaporatorWater flowl/s10,7511,8512,9514,4316,3917,9220,1622,1724,4127,6630,0033,9238,2743,6249,4555,0459,91
Pressure dropskPa3838242731252536313434273838594553
Water connectionsDN125125150150150150150150150150150150150200200200200
CondenserWater flowl/s13,2814,5716,0117,8720,1622,1224,6527,2830,0033,9736,9841,5246,9253,5660,5867,6573,77
Pressure dropskPa3128313635363135444247494355303540
Water connectionsDN6565656565656580808080808080100100100
Electrical characteristicsPower supplyV/Ph/Hz400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50
Max. running currentA136151163176201218234251293326352399454506559629699
Max. starting currentA261284331344334385402384461494519576631720773891961
Sound pressureSTD version (5)dB(A)6869707171727272737374787879808080
With SL accessory (5)dB(A)6465676767686868696969747475767676
SSL version (5)dB(A)6061636363646464656564707071727273
WeightsTransport weightkg13701399154415541819202420762449249327282863356834463772430043704440
Operating weightkg14701500168016901950223022802650270029603160395038004110465047204790




  • 1 Chilled water from 12 to 7 °C, water temperature at the condenser from 30 to 35 °C.
  • 2 Seasonal energy efficiency of cooling at low temperature. According to EU Regulation n. 2016/2281.
  • 3 Heated water from 40 to 45 °C, water temperature at the evaporator from 15 to 10 °C.
  • 4 Seasonal energy efficiency of heating at low temperature with average climatic conditions. According to EU Regulation n. 813/2013.
  • 5 Sound pressure level measured in free field conditions at 1 m from the unit. According to ISO 3744.
  • N.B. (1) Weights of SSL and WP versions are specified on technical brochure.