MCQUAY Service Guide Book Controller Configuration
35
W2 Heatpump with Auxiliary heater
To convert SB125 heatpump PCB to auxiliary
heater application, the following components
need to be added onto the PCB:
1. Shunt jumper
2. JM Relay 240VAC/ 20A
Step 1:-
Place the shunt jumper at jumper header M2.
Step 2:-
1. Place the JM relay at RY_HTR location
2. Solder all the relay pins
W2 Heatpump with Auxiliary Heater
M2
RY_HTR
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