Yuh Dak SIC-A series - Manual (Page 61)

10.9 SIC-40A-P Electrical circuit diagram
10.9.1 Control circuit principle diagram
Pump switch
Pump
motor
Compressor
Crankcase
heating zone
(obligate)
Compressor
switch
10-21
10. Electrical Circuit
Compressor
Crankcase
heating zone
(obligate)
Compressor
Crankcase
heating zone
(obligate)
Compressor
Overheat protector relay
Compressor
Overheat protector relay
The motor of the fan
contactor The motor of the fan
contactor The motor of the fan
contactor
Obligate to connect the optional constant close point of the
protector. When not need to connect the protector, it can
connect short.