The single MV on my CH circuit is a simple open/closed (HW tees off before it). I'm thinking to install a roomstat - does the black (or orange) wire stay live if the MV closes (during a CH programmed on-period)?? At present I have TRVs on all rads (and HW tank) so presumably MV never closes during a CH on-period.
CENTRAL HEATING/HOT WATER - SINGLE MOTORISED VALVE:
- Thread starter RONCHAM
- Start date
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providing the heating is calling for heat from the room stat then the orange wire will be live and valve open.
Thank you for that - so I take it the orange wire is NOT live when valve is closed. With just the single MV on my CH circuit, is there any reason why I can't fit a cylinder stat that will turn pump and boiler on/off in summer months when HW-only is programmed on (in addition to a proposed room stat)?? Presumably the only control at present during on-periods for HW or CH+HW is the boiler stat?
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