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Refrigerant circuits
Units for heating or cooling operation
Type OC208H
A Return
B Flow
C Hydraulic circuit
D Refrigerant circuit
E Four-way changeover valve
shown in cooling mode (position
"OFF")
1 Four-way changeover valve
2 High pressure switch
3 Service valve, high pressure side
4 Compressor
5 Low pressure switch
6 Service valve, low pressure side
42
7 Differential pressure switch
8 Air vent valve
9 Circulation pump, hydraulic circuit
qP Diaphragm expansion vessel
qQ Pressure gauge
qW Safety valve
qE Fill & drain valve
qR Plate-type heat exchanger
qT Liquid collector
qZ Filter
qU Expansion valve
qI Air heat exchanger with fan
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