McQuay MWSS Guide de dépannage télécharger pdf (Page 36)

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 Guide de dépannage Page 36