TWA 202÷702 S/IK/P/A

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TWA 202÷702 S/IK/P/A

TWA 202÷702 S/IK/P/A

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

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The A CLASS energy efficiency liquid Chillers and Heat Pumps of the TWA 202÷702 S/IK/P/A series, with R410A refrigerant, are designed to satisfy the needs of medium and wide-sized service sector or industrial ambients.
All units feature A CLASS energy efficiency and are equipped with Inverter control on Scroll compressor for a better efficiency at partial loads (SEER/SCOP). The Microchannel condensing coils, available on dedicated versions, ensure an even higher efficiency (high EER), having a better heat exchange than traditional coils. Furthermore, Inverter control is also available on circulating pumps and fans (EC Inverter) for a further efficiency improvement.
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.
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.

Versions

  • TWA - Cooling only
  • TWA/MC - Cooling only with MICROCHANNEL coils
  • TWA/WP - Reversible Heat Pump
  • TWA/SSL - Super silenced cooling only
  • TWA/MC/SSL - Super silenced cooling only with MICROCHANNEL coil
  • TWA/WP/SSL - Super silenced reversible Heat Pump

Power range

  • 196-668 kW
  • 56.0-190 Ton

Features

  • Structure with supporting frame, made of galvanised sheet metal with additional protection provided by polyester powder coating.
  • DC INVERTER Scroll and ON-OFF 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 tube and aluminum finned coils or aluminium MICROCHANNEL 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÷702 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.
  • 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, high and low pressure transducers 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.

Factory fitted accessories

  • IM Automatic circuit breakers
  • SL Unit silencement
  • RFM Cooling circuit shut-off valve on discharge line
  • 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
  • TXB Coil with epoxy treatment
  • EW External water connections
  • PS Single circulating pump
  • PSI Inverter single circulating pump
  • PD Double circulating pump
  • PDI Inverter double circulating pump
  • GS Single circulating pump gasket for glycol >30%
  • GD Double circulating pump gaskets for glycol >30%
  • FN Antifreeze heater for pipes
  • FG Antifreeze heater for single pump and pipes
  • FZ Antifreeze heater for evaporator, single pump and pipes
  • FM Antifreeze heater for double pump and pipes
  • FH Antifreeze heater for evaporator, double pump and pipes
  • 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
  • ISS SNMP protocol, Ethernet port
  • 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
202242302332372402442482542702
Cooling STD versionsCooling capacity (1)kW196234287316349383422458515668
Absorbed power (1)kW61739098109120133144163211
EER (1)3,213,213,193,223,203,193,173,183,163,17
Cooling STD versions (EN14511)Cooling capacity (1)kW195233286315348382421457514666
Absorbed power (1)kW62749199110121134145164213
EER (1)3,153,153,143,183,163,163,143,153,133,13
SEER (2)4,394,404,444,454,414,554,674,704,684,67
Energy Efficiency (2)%173173175175173179184185184184
Cooling MC versionsCooling capacity (1)kW196234287316349383422458515668
Absorbed power (1)kW60728997108119132143161209
EER (1)3,273,253,223,263,233,223,203,203,203,20
Cooling MC versions (EN14511)Cooling capacity (1)kW195233286315348382421457514666
Absorbed power (1)kW61739098109120133144162211
EER (1)3,203,193,183,213,193,183,173,173,173,16
SEER (2)4,444,454,494,504,464,604,734,764,744,73
Energy Efficiency (2)%175175177177175181186187187186
Heating STD versionsHeating capacity (3)kW212253311343379417458497559724
Absorbed power (3)kW637593102112124137148169218
COP (3)3,373,373,343,363,383,363,343,363,313,32
Heating STD versions (EN14511)Heating capacity (3)kW213254312344380418459499561726
Absorbed power (3)kW657795104115127140151172223
COP (3)3,283,303,283,313,303,293,283,303,263,26
SCOP (4)3,673,573,603,523,613,523,533,483,543,53
Energy Efficiency (4)%144140141138141138138136139138
CompressorQuantityn°2+22+22+22+22+23+33+33+33+33+3
Refrigerant circuitsn°2222222222
Capacity stepsn°SteplessSteplessSteplessSteplessSteplessSteplessSteplessSteplessSteplessStepless
EvaporatorWater flowl/s9,3611,1813,7115,1016,6718,3020,1621,8824,6131,92
Pressure dropskPa38363537403233363237
Water connectionsDN8080808080150150150150150
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 currentA137156194211173250202320355460
Max. starting currentA305334407424386428415534617800
Unit with pumpPump available static pressurekPa160140170185170165145185175145
Water connectionsDN100100100100100150150150150150
Sound pressureSTD versions (5)dB(A)71737574747475757677
STD versions with SL accessory (5)dB(A)68697171717172727374
SSL versions (5)dB(A)65,066,068,067,068,068,069,070,071,0---
MC versions (5)dB(A)70727473737374747576
MC versions with SL accessory (5)dB(A)67687070707071717273
MC/SSL versions (5)dB(A)64,065,067,066,067,067,068,069,070,0---
WeightsTransport weightkg2251238425112791285131863248365838364392
Operating weightkg2270241025502830289032303300371039004470

Dimensions

202242302332372402442482542702
LSTD-MCmm4000400040005000500050005000620062007200
SSL-MC/SSLmm500050005000620062006200620072007200---
WSTD-SSL-MC-MC/SSLmm2200220022002200220022002200220022002200
HSTD-SSL-MC-MC/SSLmm2100210021002100210021002100210021002100

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. 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.
  • N.B. (2) Data of MC versions are specified on technical brochure.