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MCQUAY Service Guide Book Controller Configuration

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

RY_HTR

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McQuay MWSS Guida alla Risoluzione dei Problemi Pagina 36