TWA 332÷1822 VV/Y/A

A CLASS energy efficiency aircooled liquid Chillers and Heat Pumps with axial fans, (Inverter) Screw compressors and shell and tube exchanger

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The TWA 332÷1822 VV/Y/A units, in A CLASS energy efficiency, have extremely high efficiency levels due to reduced electrical absorption and a high efficiency of the compressor-exchanger combination.
Are available as option the new EC Inverter fans with high available static pressure and efficiency.
The Heat Pump versions are designed for hot water production up to 55°C.

On request, units can be supplied with R513A refrigerant.
Cooling only models 1302÷1702 are compliant to the ErP 2021 Regulation. Cooling only models 1902÷6002 are compliant to the ErP 2021 Regulation for process cooling application; for comfort cooling application they are compliant with EC or ECH accessory (EC Inverter fans).
Heat pump models 1302÷2002 are compliant to the ErP Regulation; models 2602÷6002 are compliant if provided with EC or ECH accessory (EC Inverter fans).

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

Power range

263-1533 kW
75,0-436 Ton

Features

Structure with supporting frame, made of galvanised sheet metal with additional protection provided by polyester powder coating.
Screw compressors with built-in oil separator, suction filter, crankcase heater, oil sight glass, thermal protection and stepless capacity steps.
Axial fans directly coupled to an electric motor with external rotor.
Condenser made of copper tube and aluminum finned coils or aluminium MICROCHANNEL 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 valves on discharge and liquid line.
Electronic expansion valve.
Electronic high and low pressure gauges.
R134a refrigerant. On request R513A refrigerant.
Electrical board includes: main switch with door safety interlock, fuses, 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 0 °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 -10 °C.
Microprocessor control and regulation system.

Accessories

Factory fitted accessories

IM Automatic circuit breakers
SL Unit silencement
DSV Double relief safety valve with changeover switch on the high pressure side for each refrigerant circuit
DSVHL Double relief safety valve with changeover switch on the high and on the low pressure side of each refrigerant circuit
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
TXB Coil with epoxy treatment
EW External water connections
SP Inertial tank
PU Single circulating pump
PUI Inverter single circulating pump
PD Double circulating pump
PDI Inverter double circulating pump
SPU Inertial tank and single circulating pump
SPUI Inertial tank and Inverter single circulating pump
SPD Inertial tank and double circulating pump
SPDI Inertial tank and Inverter double circulating pump
GS Single circulating pump gasket for glycol >30%
GD Double circulating pump gaskets for glycol >30%
FE Antifreeze heater for evaporator
FX Antifreeze heater for evaporator and pipes
FB Antifreeze heater for evaporator/tank
FQ Antifreeze heater on evaporator/tank and pipes
FZ Antifreeze heater for evaporator, single pump and pipes
FH Antifreeze heater for evaporator, double pump and pipes
FU Antifreeze heater for evaporator/tank, single pump and pipes
FD Antifreeze heater for evaporator/tank, double pump and pipes
II Inverter on one compressor and soft start for other compressors
ID Inverter on all compressors
SS Soft start
WM Web Monitoring - Wireless remote monitoring (GPRS/EDGE/4G/TCP-IP)
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
CP Potential free contacts
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
FL Flow switch