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ESP Altherma/ Relais #269

Closed Answered by raomin
Alexander-Wehner asked this question in Q&A
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To switch ON and OFF that's not the SG1/2 pin that you need to set.
You need to wire a relay module to the external thermostat connections.
Refer to the schematic map of your heat pump to see where to connect external On Off thermostat.

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