McQuay M5MAC Troubleshooting Guide download pdf (Page 36)

McQuay Service Guide Book

W2 Heatpump with Auxiliary heater

To convert SB125 heatpump PCB to auxiliary heater application, you need the following components

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

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McQuay M5MAC Troubleshooting Guide Page 36