Airwell RWC 360 [3/16] Refrigerant flow diagrams

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Refrigerant Flow Diagrams

Low pressure liquid refrigerant enters the cooler (Evaporator) and is

evaporated and superheated by the heat energy absorbed from the

chilled water passing through the cooler shell.

Low pressure vapour enters the compressor where pressure and

superheat are increased. Heat is rejected by the water cooled

condenser.

The fully condensed and subcooled liquid refrigerant then enters

the expansion valve where pressure reduction and further cooling

takes place before returning to the cooler.

The RWC unit can operate as a water to water heat pump by

reversing the cycle on the water circuits using three way valves.

Pressostatic two way valves are available as an option for remote

location in the evaporator and condenser water pipework.

Note : This type of operation is possible only if the condensers are

supplied with well water or disposable water. The system cannot be

used if a cooling tower is used.

COMPONENTS

1 Compressor 7 Sight glass

2 Discharge valve 8 Solenoid valve

3 PED safety valve 9 Thermal expansion valve

4 Condenser 10 Evaporator

5 Liquid valve 11 PED safety valve

6 Filter

SAFETY DEVICES

Pressure tapping points and

refrigerant charge/discharge points

�

HP pressure switch

�

LP pressure switch

RWC units

Cooling mode Heating mode