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HVAC Electrical Heating Thermostat M5.XX Installation Guide — questions & answers

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Where should the protective ground be connected on the M5.XX thermostat, and what is the purpose of terminal 7?

2026-05-15 1 answer

Based on the M5.XX Electrical Thermostat Mounting Manual, the device does not appear to have a dedicated terminal for a protective ground (PE) connection…

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