TWA 212÷1102 S/K

Aircooled liquid Chillers and Heat Pumps with axial fans, Scroll compressors and shell and tube 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_shell_and_tube.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 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÷13010 are compliant to the ErP Regulation; models
15010÷36012 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

  • 200-1062 kW
  • 57.0-302 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.
  • 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 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
  • 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
  • PU Single circulating pump
  • PUI Inverter single circulating pump
  • PD Double circulating pump
  • PDI Inverter double circulating pump
  • FE Antifreeze heater for evaporator
  • FN Antifreeze heater for pipes
  • FZ Antifreeze heater for evaporator, single pump and pipes
  • FH Antifreeze heater for evaporator, 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
  • FL Flow switch
CoolingCooling capacity (1)kW2002242482703023283674044455105516146847668629611062
Absorbed power (1)kW70808697105115121136158174186214250281307340369
EER (1)2,862,802,882,782,882,853,032,972,822,932,962,872,742,732,812,832,88
Cooling (EN14511)Cooling capacity (1)kW1992232472693013263654034445085496116827638589581058
Absorbed power (1)kW71818798106117123137159176188217252284311343373
EER (1)2,802,752,842,742,842,792,972,942,792,892,922,822,712,692,762,792,84
SEER (2)3,803,833,963,993,853,964,074,274,314,294,314,394,324,334,314,344,32
Energy Efficiency (2)%149150155157151155160168169169169173170170169171170
SEER with EC or ECH accessory (2)4,134,114,174,224,154,234,344,564,564,554,554,554,564,554,564,554,55
Energy Efficiency with EC or ECH accessory (2)%162161164166163166171179179179179179179179179179179
HeatingHeating capacity (3)kW22925228030433636240144251258162669879187898111001222
Absorbed power (3)kW748391106109123130145167186204226257288316353388
COP (3)3,093,043,082,873,082,943,083,053,073,123,073,093,083,053,103,123,15
Heating (EN14511)Heating capacity (3)kW22925228030533636340244351358262769979287998211011223
Absorbed power (3)kW748391107109124131146168187205227258289317354389
COP (3)3,093,043,082,863,072,933,073,043,063,123,063,083,073,043,103,113,14
SCOP (4)3,223,203,213,223,213,223,233,213,203,193,193,193,193,193,193,193,19
Energy Efficiency (4)%126125125126125126126125125125125125125125125125125
Refrigerant circuits22222222222222222
Capacity steps6666888881010101010101010
EvaporatorWater flowl/s9,4410,5811,7112,7514,2615,4917,3319,0821,0124,0826,0228,9932,3036,1740,7145,3850,15
Pressure dropskPa4542455048565545334354594655624752
Water connectionsDN100100100100100100100125125125125125150150150150150
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 pressurekPa15014019517018016515014013516515013013015012512595
Water connectionsDN100100100100100100100100100100100150150150150150150
Sound pressureSTD version (5)dB(A)7070707272727373727375767676767677
With SL accessory (5)dB(A)6767676969696970697072737373737374
SSL version (5)dB(A)646464666565676666676970706970------
WeightsTransport weightkg17031723181320032253253226422691328333833565360538404385470552105330
Operating weightkg17501770186020502310260027102780338034803670372039704540486054705590




  • 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.