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Units for heating or cooling operation
Type OC211H to OC215H
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 Defrost pressure switch
4 Service valve, high pressure side
5 Compressor
6 Low pressure switch
7 Service valve, low pressure side
Refrigerant circuits
(cont.)
8 Differential pressure switch
9 Air vent valve
qP Circulation pump, hydraulic circuit
qQ Diaphragm expansion vessel
qW Safety valve
qE Pressure gauge
qR Fill & drain valve
qT Plate-type heat exchanger
qZ Liquid collector
qU Capillary pipe
qI Capillary pipe
qO Butterfly valve
wP Air heat exchanger with fan
43
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