Can anyone help with a wiring diagram for a drayton hts3 cylinder thermostat? I currently have a sunvic stat with blue brown and earth connections not sure how these will connect to the hts3.
The drayton normally requires a three wire connection, common, call & satisfied. What sort of motorised valve(s) do you have? If you have 2 zone valves, then you can just use the common & call terminals.
I assume that blue and brown are actually both live as you would have on a normal switch and as the hts3 does not need an earth as it is double insulated I only need the blue and brown wires?
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