Room thermostat wiring

Maxwell Boltzmann · 2017-10-15T08:40:10+00:00

I have to fit a room thermostat into a building where there is already an old three-wire connection for a (mechanical) thermostat, but no existing thermostat. So it is not immediately obvious which wire is which. There is no earth connection. Using a multimeter, what is the simplest and safest way of identifying each wire? Max

Oct 15, 2017 40 Replies

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tabbypurr 8 years ago

stupidity

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Room thermostat wiring

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