TWA 212÷1102 S/K/P

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_icon_refrigerant_R410A.png ktk_icon_refrigerant_R452B.png ktk_icon_refrigerant_R454B.png

The liquid Chillers and Heat Pumps of the TWA 212÷1102 S/K/P series, with R410A refrigerant, are designed for large-sized service sector or industrial ambients.
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.
Are available as option the new EC Inverter fans with high available static pressure and efficiency.
Cooling only 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).
Heat pump models 726-P÷13010-P are compliant to the ErP Regulation; models
15010-P÷36012-P are compliant if provided with EC or ECH accessory (EC Inverter fans).
On request, units can be supplied with R452B or R454B refrigerant.


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

Power range

  • 199-1051 kW
  • 57.0-299 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 coils.
  • Evaporator AISI 316 stainless steel braze welded plates type with two independent circuits on the refrigerant side and one on the water side, complete with water differential pressure switch. On the Heat Pump units it is always installed an antifreeze heater.
  • Cooling circuit shut-off valve on liquid line in 302÷1102 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 or magnetothermic switches, thermal protection relays for compressors and thermocontacts for fans.
  • Microprocessor control and regulation system.

Factory fitted accessories

  • SL Unit silencement
  • RFM Cooling circuit shut-off valve on discharge 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
  • EW External water connections
  • PS Single circulating pump
  • PSI Inverter single circulating pump
  • PD Double circulating pump
  • PDI Inverter double circulating pump
  • FN Antifreeze heater for pipes
  • FG Antifreeze heater for single pump and pipes
  • FM Antifreeze heater for double pump and pipes
  • 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 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
  • RP Coils protection metallic guards
  • FP Coils protection metallic guards with filter
  • AG Rubber shock absorbers
  • AM Spring shock absorbers
CoolingCooling capacity (1)kW1992262512763043353674034444955466026717518459421051
Absorbed power (1)kW69808594104113122132155170184211243275303336365
EER (1)2,882,832,952,942,922,963,013,052,862,912,972,852,762,732,792,802,88
Cooling (EN14511)Cooling capacity (1)kW1982252502753033343654024424935445996697498429391047
Absorbed power (1)kW70818695105115124134157172186214246277306339369
EER (1)2,842,782,892,892,872,912,953,002,812,872,922,812,722,702,752,772,84
SEER (2)3,823,813,863,963,904,034,134,124,114,174,174,124,194,104,154,174,12
Energy Efficiency (2)%150149151155153158162175161167164162165161163164169
SEER with EC or ECH accessory (2)4,134,114,174,224,154,234,344,554,564,554,554,554,564,554,564,554,55
Energy Efficiency with EC or ECH accessory (2)%162161164166163166171179179179179179179179179179179
HeatingHeating capacity (3)kW22825528331033836940144151056462068477686196210781210
Absorbed power (3)kW738390103108121132141164182202223249282312349383
COP (3)3,123,073,143,013,133,053,043,133,113,103,073,073,123,053,083,093,16
Heating (EN14511)Heating capacity (3)kW22825528331133837040244251156562168577786296310791211
Absorbed power (3)kW738390103108122133142165183203224250283313350384
COP (3)3,123,073,143,013,123,043,033,123,103,093,073,063,113,053,083,083,15
SCOP (4)3,203,213,223,213,223,213,223,213,223,193,193,193,193,193,193,193,19
Energy Efficiency (4)%125125126125126125126125126125125125125125125125125
Refrigerant circuits22222222222222222
Capacity steps6666888881010101010101010
EvaporatorWater flowl/s9,5110,8011,9913,1914,5216,0117,5319,2521,2123,6526,0928,7632,0635,8840,3745,0150,21
Pressure dropskPa4051625450495947594960584941514252
Water connectionsDN808080808080808080808080150150150150150
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 currentA152166179191216233250274316350375422485545598676746
Max. starting currentA2762993473593494014184074845185436006627598129381007
Unit with pumpPump available static pressurekPa155130175160180170145140110165145135125165140130100
Water connectionsDN100100100100100100100100100100100150150150150150150
Sound pressureSTD version (5)dB(A)7070707272727373727375767676767677
With SL accessory (5)dB(A)6767676969696970697072737373737374
SSL version (5)dB(A)646464666565676666676970706970------
WeightsTransport weightkg16541674176319612199245725662610317932943463351736824200451849185044
Operating weightkg16701690178019802220248025902640321033303500356037304260458049905120




  • 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. 811/2013.
  • 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.