I've got a Halstead wireless thermostat to use on our Intergas boiler. Wiring up should be no problem, but so far I've not managed to find wiring for the receiver. What I'm trying to confirm is that the "M" connections is 220 ac mains and not say DC 24v so I don't fry it! Does anyone on the forum have experience of these thermostats and can confirm the connection to "M".
Thanks