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  1. M

    Honeywell 5-wire zone valve wiring (to Nest)

    Hi All I'm trying to replace Honeywell thermostats with Nest. I don't do this professionally (something similar-ish) but have a fair amount of experience. The wiring centre is simple, Neutral, Live and Earth and six wires from three existing thermostats (two each). I think the valves are...
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