JWA 7÷20 S/IK/P/A

Home KTK Products Junior line - Liquid Chillers and Heat Pumps units <200kW AIRCOOLED LIQUID CHILLERS AND HEAT PUMPS JWA 7÷20 S/IK/P/A
JWA 7÷20 S/IK/P/A
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JWA 7÷20 S/IK/P/A

A CLASS energy efficiency aircooled liquid Chillers and Heat Pumps with axial fans, Inverter Scroll compressor, plate exchanger and high efficiency EC Inverter circulator

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The JWA 7÷20 S/IK/P/A series is the winning choice for ideal comfort in residential and commercial environments.
The range, in A CLASS energy efficiency, features Inverter technology on the compressor, for high efficiency at partial loads. The range excels for its compact sizes, quietness and optimised water circuit, on a peraluman structure. Particular design features enable immediate and effective use, easy installation and lasting reliability.
These extremely compact and high-tech units offer you ideal comfort in all seasons.
The unit features high efficiency integrated circulator with EC Inverter brushless electronic motor.
The units are compliant to the ErP Regulation.

Versions

  • JWA - Cooling only
  • JWA/WP - Reversible Heat Pump

Power range

  • 6.0-22.0 kW
  • 1.7-6.4 Ton

Features

  • Structure with supporting frame, in peraluman, galvanized sheet and with rubber shock absorbers on the frame. Sound-proofed compressor compartment (14÷20).
  • DC INVERTER Scroll compressor with internal overheat protection, crankcase heater and soundproofing cover (14÷20).
  • Axial fans with low ventilation and special wing profile, directly coupled to external rotor motors.
  • Condenser made of copper tubes and aluminium finned coil, complete with drain pan for WP version only.
  • Evaporator AISI 96 stainless steel braze welded plates type, complete with water differential pressure switch. On the Heat Pump units it is always installed an antifreeze heater.
  • Electronic expansion valve.
  • R110A refrigerant.
  • Electrical board includes: main switch with door lock device, fuses, compressor and pump remote control switch.
  • 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 and high and low pressure transducers on cooling circuit.
  • Functioning in heating mode with outside air temperature down to -15 °C.
  • Water circuit includes: water differential pressure switch, high efficiency EC Inverter circulator, safety valve and expansion vessel.
  • High efficiency circulator with EC Inverter brushless electronic motor with 3 speeds selectable by the user.
  • Microprocessor control and regulation system.
  • Advanced functions: remote set-point with 0-10V signal, remote set-point with 4-20 mA signal, remote signal for second set-point activation, demand limit from digital input, management of hybrid systems, management of domestic hot water production.

Factory fitted accessories

  • TX Coil with pre-coated fins

Loose accessories

  • CR Remote control panel
  • IS Modbus RTU protocol, RS485 serial interface
  • RP Coils protection metallic guards
  • FP Coils protection metallic guards with filter
791114161820
CoolingCooling capacity (1)kW6,07,69,312,415,719,022,4
Absorbed power (1)kW1,82,43,03,84,96,07,2
EER (1)3,333,173,103,263,203,173,11
Cooling (EN14511)Cooling capacity (1)kW6,07,79,412,515,819,122,5
Absorbed power (1)kW1,82,43,03,94,96,07,2
EER (1)3,323,183,123,233,203,163,11
SEER (2)4,124,114,104,684,744,714,72
Energy Efficiency (2)%162161161184187185186
HeatingHeating capacity (3)kW6,78,810,914,117,520,924,8
Absorbed power (3)kW1,92,53,24,04,95,97,0
COP (3)3,533,523,413,533,573,543,54
Heating (EN14511)Heating capacity (3)kW6,78,810,814,017,420,824,7
Absorbed power (3)kW1,92,53,24,14,96,07,0
COP (3)3,473,493,393,443,523,503,51
SCOP (4)3,603,733,723,643,643,703,69
Energy Efficiency (4)%141146146143143145145
Energy Class (5)A+A+A+A+A+A+A+
SCOP (6)2,862,922,912,922,872,902,89
Energy Efficiency (6)%111114113114112113113
Energy Class (7)A+A+A+A+A+A+A+
CompressorQuantityn°1111111
Electrical characteristicsPower supplyV/Ph/Hz230/1/50230/1/50230/1/50400/3+N/50400/3+N/50400/3+N/50400/3+N/50
Max. running currentA15151514141720
Max. starting currentA11111113131518
Water circuit.Water flowl/s0,290,360,440,590,750,911,07
Pump available static pressurekPa53565276827060
Water connections"G1"1"1"1"1"1"1"
Sound pressure  (8)dB(A)51525557585960
WeightsTransport weightkg101113123195197199201
Operating weightkg126138148245247249251

Dimensions

791114161820
LSTDmm8708708701160116011601160
WSTDmm320320320500500500500
HSTDmm1100110011001270127012701270

Notes

  • 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 Seasonal energy efficiency of heating at medium temperature with average climatic conditions. According to EU Regulation n. 813/2013.
  • 7 Seasonal energy efficiency class of heating at medium temperature with average climatic conditions. According to EU Regulation n. 811/2013.
  • 8 Sound pressure level measured in free field conditions at 1 m from the unit. According to ISO 3744.
  • N.B. (1) Weights of WP version are specified on technical brochure.