TWA/WP 212÷682 S/K/P/A

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TWA/WP 212÷682 S/K/P/A

TWA/WP 212÷682 S/K/P/A

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

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The TWA/WP 212÷682 S/K/P/A reversible Heat Pumps are characterized by A CLASS energy efficiency.
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.
Are available as option the new EC Inverter fans with high available static pressure and efficiency.
The units 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/WP - Reversible Heat Pump

Power range

  • 227-762 kW
  • 65,0-217 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 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 units it is always installed an antifreeze heater.
  • Cooling circuit shut-off valve on liquid line in 302÷682 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.
  • Functioning in heating mode with outside air temperature down to -15 °C.
  • Microprocessor control and regulation system.

Factory fitted accessories

  • ISB BACnet MSTP protocol, RS485 serial interface
  • 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
  • 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
  • PDI Inverter double circulating pump
  • 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
  • IM Automatic circuit breakers
  • PD Double circulating pump
  • PSI Inverter single circulating pump
  • PS Single circulating pump
  • EW External water connections
  • TX Coil with pre-coated fins
  • RT Total heat recovery
  • DS Desuperheater
  • ECH EC Inverter fans with high available static pressure
  • EC EC Inverter fans
  • BT Low water temperature kit
  • CC Condensing control down to -20 °C
  • CT Condensing control down to 0 °C
  • RFL Cooling circuit shut-off valve on liquid line
  • RFM Cooling circuit shut-off valve on discharge line
  • SL Unit silencement

Loose accessories

  • CR Remote control panel
  • RP Coils protection metallic guards
  • AG Rubber shock absorbers
  • AM Spring shock absorbers