JWA 051÷172 S/K

Home KTK Products Junior line - Liquid Chillers and Heat Pumps <200kW AIRCOOLED LIQUID CHILLERS AND HEAT PUMPS JWA 051÷172 S/K
JWA 051÷172 S/K
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JWA 051÷172 S/K

Aircooled liquid Chillers and Heat Pumps with axial fans, Scroll compressors and shell and tube exchanger

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The liquid Chillers and Heat Pumps of the JWA 051÷172 S/K series, with R410A refrigerant, are designed for medium-sized service sector or industrial ambients.
They are used, combined with Fan Coil units, for the air conditioning of the rooms or to remove the heat developed during industrial processes. They can be supplied with Modbus RTU protocol through RS485 serial interface.
Equipped with axial fans, Scroll compressors and shell and tube 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.
Are available as option the new EC Inverter fans with high available static pressure and efficiency for indoor ducted installation.
Units are compliant to the ErP 2021 Regulation for process cooling application; for comfort cooling application they are compliant if provided with EC or ECH accessory (EC Inverter fans).

On request, units can be supplied with R452B or R454B refrigerant.

Versions

  • 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

  • 49.0-188 kW
  • 14.0-54.0 Ton

Features

  • 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.
  • Shell and tube type evaporator 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.
  • 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.
  • 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
  • HR Desuperheater
  • HRT/S Total heat recovery in series
  • HRT/P Total heat recovery in parallel
  • TX Coil with pre-coated fins
  • EW External water connections
  • SP Inertial tank
  • PU Single circulating pump
  • PUI Inverter single circulating pump
  • PD Double circulating pump
  • PDI Inverter double circulating pump
  • SPU Inertial tank and single circulating pump
  • SPUI Inertial tank and Inverter single circulating pump
  • SPD Inertial tank and double circulating pump
  • SPDI Inertial tank and Inverter double circulating pump
  • GS Single circulating pump gasket for glycol >30%
  • GD Double circulating pump gaskets for glycol >30%
  • FE Antifreeze heater for evaporator
  • FN Antifreeze heater for pipes
  • FQ Antifreeze heater on evaporator/tank and pipes
  • FZ Antifreeze heater for evaporator, single pump and pipes
  • FH Antifreeze heater for evaporator, double pump and pipes
  • FU Antifreeze heater for evaporator/tank, single pump and pipes
  • FD Antifreeze heater for evaporator/tank, double pump and pipes
  • SS Soft start
  • IS Modbus RTU protocol, RS485 serial interface
  • IAV Remote set-point, 0-10V signal
  • IAA Remote set-point, 4-20mA signal
  • IAS Remote signal for second set-point activation
  • IDL Demand limit from digital input
  • MN High and low pressure gauges

Loose accessories

  • CR Remote control panel
  • RP Coils protection metallic guards
  • FP Coils protection metallic guards with filter
  • AG Rubber shock absorbers
  • AM Spring shock absorbers
  • FL Flow switch
051061071081091101111131152172
CoolingCooling capacity (1)kW49,055,062,473,384,395,2109129149179
Absorbed power (1)kW16,618,821,525,328,631,637,543,750,758,8
EER (1)2,952,932,902,902,953,012,912,952,943,04
Cooling (EN14511)Cooling capacity (1)kW48,954,962,273,084,195,0109129149179
Absorbed power (1)kW16,719,021,925,829,032,038,044,251,459,5
EER (1)2,922,892,852,842,902,972,862,912,893,00
HeatingHeating capacity (2)kW55,761,970,280,791,4105119137156188
Absorbed power (2)kW17,819,622,825,729,133,438,144,251,161,0
COP (2)3,133,163,083,143,143,143,123,103,053,08
Heating (EN14511)Heating capacity (2)kW55,862,170,581,191,7105119137156188
Absorbed power (2)kW18,019,923,426,429,734,038,944,952,061,9
COP (2)3,103,123,023,073,093,103,073,063,013,04
CompressorQuantityn°2222233344
Refrigerant circuitsn°1111111122
Capacity stepsn°2222233344
EvaporatorWater flowl/s2,342,622,983,494,024,545,196,157,108,53
Pressure dropskPa22295055403945364338
Water connections"G1 ½"1 ½"2"2"2 ½"2 ½"2 ½"3"3"3"
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 currentA4144556067798697112131
Max. starting currentA164166179192235202218264244298
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 currentA44485963718490102116135
Max. starting currentA168170182196238207222269248303
Unit with tank and pumpPump available static pressurekPa160150125110140185170170155145
Tank water volumel470470470470470470470470660660
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/s2,342,622,983,494,024,545,196,157,108,53
Pump available static pressurekPa155145115100105145135140120110
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 versionsPa90801001001008095756060
SSL versionsPa858575757050706060---
ST versionsPa90801001001008095756060
SSL/ST versionsPa858575757050706060---
Sound pressureSTD and ST versions (3)dB(A)61616464656767676767
With SL accessory (3)dB(A)59596262636565656565
SSL and SSL/ST versions (3)dB(A)57,057,060,060,061,062,063,063,063,0---
WeightsTransport weight (4)kg641661701719844931971111211921428
Operating weight (4)kg6606807207408709601000115012301470
Weights (ST versions)Transport weightkg656676716734859951991113212121448
Operating weightkg6756957357558859801020117012501490

Dimensions

051061071081091101111131152172
LSTD-STmm2350235023502350235023502350235035503550
SSL-SSL/STmm235023502350235023502350355035503550---
WSTD-SSL-ST-SSL/STmm1100110011001100110011001100110011001100
HSTD-SSL-ST-SSL/STmm1950195019501950225022502250225022502250

Notes

  • 1 Chilled water from 12 to 7 °C, ambient air temperature 35 °C.
  • 2 Heated water from 40 to 45 °C, ambient air temperature 7 °C d.b./6 °C w.b.
  • 3 Sound pressure level measured in free field conditions at 1 m from the unit. According to ISO 3744.
  • 4 Unit without tank and pump.
  • N.B. (1) Weights of SSL and WP versions are specified on technical brochure.