CHA/K 726÷36012

Aircooled liquid Chillers and Heat Pumps with axial fans, Scroll compressors and shell and tube exchanger

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The liquid Chillers and Heat Pumps of the CHA/K 726÷36012 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.
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.

Versions

CHA/K - Cooling only
CHA/K/WP - Reversible Heat Pump
CHA/K/SSL - Super silenced cooling only
CHA/K/WP/SSL - Super silenced reversible Heat Pump

Power range

200-1062 kW
57,0-302 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.
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 1048÷36012 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.

Accessories

Factory fitted accessories

PD Double circulating pump
MN High and low pressure gauges
IDL Demand limit from digital input
IAS Remote signal for second set-point activation
IAA Remote set-point, 4-20mA signal
IAV Remote set-point, 0-10V signal
ISS SNMP protocol, Ethernet port
ISBT BACnet IP protocol, Ethernet port
ISB BACnet MSTP protocol, RS485 serial interface
IST Modbus TCP/IP protocol, Ethernet port
IS Modbus RTU protocol, RS485 serial interface
SS Soft start
FE Antifreeze heater for evaporator
GD Double circulating pump gaskets for glycol >30%
GS Single circulating pump gasket for glycol >30%
PDI Inverter double circulating pump
SL Unit silencement
PUI Inverter single circulating pump
PU Single circulating pump
EW External water connections
TX Coil with pre-coated fins
HRT/P Total heat recovery in parallel
HRT/S Total heat recovery in series
HR 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

Loose accessories

CR Remote control panel
RP Coils protection metallic guards
AG Rubber shock absorbers
AM Spring shock absorbers
FL Flow switch