JWA 051÷172 S/K/P/AF

A CLASS energy efficiency aircooled liquid Chillers and Heat Pumps with axial fans, Scroll compressors and plate exchanger

_ktk_icon_versions_cooling_only.png _ktk_icon_versions_cooling_heating.png _ktk_icon_compressor_scroll.png _ktk_icon_axial_fan.png _ktk_icon_plate.png _ktk_aqualogik_technology.png _icon_A_CLASS_2018_KTK_cooling.png _icon_A_CLASS_2018_KTK_heating.png _ktk_icon_refrigerant_R410A.png ktk_icon_refrigerant_R452B.png ktk_icon_refrigerant_R454B.png

The liquid Chillers and Heat Pumps of the JWA 051÷172 S/K/P/AF series, with R410A refrigerant, are designed for medium-sized service sector or industrial ambients and feature A CLASS energy efficiency.
They are used, combined with Fan Coil units, for the air conditioning or heating of the rooms or to remove the heat developed during industrial processes.
Equipped with axial fans, Scroll compressors and plate exchanger, even in the super silent version, these units can be completed by a hydraulic circuit with tank, with pump, with tank and pump or with AQUALOGIK technology.
The AQUALOGIK smart control system optimises the water set point and modulates the power supply voltage of the pump and the fans, thus making the use of the inertial tank superfluous. This obtains high energy efficiency, quiet operation and optimised dimensions and costs.
A wide range of accessories, factory fitted or supplied separately, complete the outstanding versatility and functionality of the series.
Are available as option the new EC Inverter fans with high available static pressure and efficiency for indoor ducted installation.
The Heat Pump versions are designed for hot water production up to 55°C.
The units are compliant to the ErP Regulation.
On request, units can be supplied with R452B or R454B refrigerant.


  • JWA - Cooling only
  • JWA/WP - Reversible Heat Pump
  • JWA/SSL - Super silenced cooling only
  • JWA/WP/SSL - Super silenced reversible Heat Pump
  • JWA/ST - Cooling only with AQUALOGIK technology
  • JWA/WP/ST - Reversible Heat Pump with AQUALOGIK technology
  • JWA/SSL/ST - Super silenced cooling only with AQUALOGIK technology
  • JWA/WP/SSL/ST - Super silenced reversible Heat Pump with AQUALOGIK technology

Power range

  • 51.0-183 kW
  • 15.0-52.0 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.
  • Axial fans directly coupled to an electric motor with external rotor.
  • Condenser made of copper tubes and aluminium finned coil.
  • Evaporator AISI 316 stainless steel braze welded plates type with one circuit on the refrigerant side and one on the water side in 051÷131 models; with two independent circuits on the refrigerant side and one on the water side in 152÷172 models, complete with water differential pressure switch. On the Heat Pump units it is always installed an antifreeze heater.
  • R410A refrigerant. On request R452B or R454B refrigerant.
  • Electrical board includes: main switch with door safety interlock, fuses, thermal protection relays for compressors and thermocontacts for fans.
  • On ST versions water circuit includes INVERTER circulating pump, safety valve and expansion vessel.
  • On ST versions Condensing Control is included: electronic proportional device that ensures efficient and continuous functioning of the unit with outside air temperature down to –20 °C in cooling mode. It also allows to reduce the sound level especially at night. It consists of a fans speed controller with continuous speed regulation, an high/low pressure transducer on cooling circuit and an electrical heater on electrical board.
  • Functioning in heating mode with outside air temperature down to -15 °C.
  • Microprocessor control and regulation system (with AQUALOGIK technology on ST versions).

Factory fitted accessories

  • IM Automatic circuit breakers
  • SL Unit silencement
  • RFM Cooling circuit shut-off valve on discharge line
  • RFL Cooling circuit shut-off valve on liquid line
  • CT Condensing control down to 0 °C
  • CC Condensing control down to -20 °C
  • BT Low water temperature kit
  • EC EC Inverter fans
  • ECH EC Inverter fans with high available static pressure
  • DS Desuperheater
  • RT Total heat recovery
  • TX Coil with pre-coated fins
  • SI Inertial tank
  • PS Single circulating pump
  • PD Double circulating pump
  • FN Antifreeze heater for pipes
  • FO Antifreeze heater for tank and pipes
  • FG Antifreeze heater for single pump and pipes
  • FM Antifreeze heater for double pump and pipes
  • FUM Antifreeze heater for tank, single pump and pipes
  • FDM Antifreeze heater for tank, double pump and pipes
  • SS Soft start
  • IS Modbus RTU protocol, RS485 serial interface

Loose accessories

  • MN High and low pressure gauges
  • CR Remote control panel
  • RP Coils protection metallic guards
  • FP Coils protection metallic guards with filter
  • AG Rubber shock absorbers
  • AM Spring shock absorbers
CoolingCooling capacity (1)kW51,159,167,276,687,9100115133156183
Absorbed power (1)kW16,018,520,924,227,631,035,841,548,356,9
EER (1)3,193,193,223,173,183,233,213,203,233,22
Cooling (EN14511)Cooling capacity (1)kW51,058,967,176,487,699,7115133156183
Absorbed power (1)kW16,318,821,224,628,131,536,342,248,957,5
EER (1)3,133,143,173,113,123,173,173,153,193,18
SEER (2)4,174,214,204,194,194,224,254,164,164,18
Energy Efficiency (2)%164165165165165166167163163164
HeatingHeating capacity (3)kW55,464,172,983,195,3109124144169198
Absorbed power (3)kW16,819,422,025,428,832,537,743,451,059,7
COP (3)3,303,303,313,273,313,353,293,323,313,32
Heating (EN14511)Heating capacity (3)kW55,664,373,183,495,7109124144169198
Absorbed power (3)kW17,219,822,425,929,533,238,344,251,760,5
COP (3)3,243,253,273,223,253,303,243,263,273,27
SCOP (4)3,363,323,313,433,453,353,373,343,333,32
Energy Efficiency (4)%131130129134135131132131130130
Energy Class (5)A+A+A+A+------
Refrigerant circuits1111111122
Capacity steps2222233344
EvaporatorWater flowl/s2,442,823,203,654,194,775,486,347,448,72
Pressure dropskPa43423341494237463531
Water connections"G1 ½"1 ½"2 ½"2 ½"2 ½"2 ½"2 ½"2 ½"2 ½"2 ½"
Electrical characteristicsPower supplyV/Ph/Hz400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50
Max. running currentA38445157687385102113136
Max. starting currentA132142148172212169200246229280
Electrical characteristics (ST versions)Power supplyV/Ph/Hz400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50400/3/50
Max. running currentA42485460717890106118140
Max. starting currentA135145152176215173204250233284
Unit with tank and pumpPump available static pressurekPa140135130125160175160140130140
Tank water volumel400400400400400400400400600600
Expansion vessell12121212121212121818
Water connections"G2 ½"2 ½"2 ½"2 ½"2 ½"2 ½"2 ½"2 ½"2 ½"2 ½"
Unit ST versionsWater flowl/s2,442,823,203,654,194,775,486,347,448,72
Pump available static pressurekPa135130135115100140140125125115
Water connections"G2 ½"2 ½"2 ½"2 ½"2 ½"2 ½"2 ½"2 ½"2 ½"2 ½"
ECH fan available static pressureSTD versionsPa706010080758080807565
SSL versionsPa7060959080808080------
ST versionsPa706010080758080807565
SSL/ST versionsPa7060959080808080------
Sound pressureSTD and ST versions (6)dB(A)63646666676767686868
With SL accessory (6)dB(A)61626464656565666666
SSL and ST/SSL versions (6)dB(A)5859616161616161------
WeightsTransport weight (7)kg574606625679728836973101513051367
Operating weight (7)kg578610630685734843982102413201387
Weights (ST versions)Transport weightkg589621640694743856993103513251387
Operating weightkg5936256457007498631002104413401407




  • 1 Chilled water from 12 to 7 °C, ambient air temperature 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, ambient air temperature 7 °C d.b./6 °C w.b.
  • 4 Seasonal energy efficiency of heating at low temperature with average climatic conditions. According to EU Regulation n. 813/2013.
  • 5 Seasonal energy efficiency class of heating at low temperature with average climatic conditions. According to EU Regulation n. 811/2013.
  • 6 Sound pressure level measured in free field conditions at 1 m from the unit. According to ISO 3744.
  • 7 Unit without tank and pump.
  • N.B. (1) Weights of SSL and WP versions are specified on technical brochure.