HJelp with wiring up a central heating timer
Discussion
N and L are your 230v live and neutral supply to power the clock.
CH off you won't need.
HW off you may need if you have a 3 port valve instead off 2x 2 port valves. If you do have a 3 port valve, it should be wired up to the grey wire on your 3 port valve. Don't quote me as some valves use different coloured wires.
HW on should be wired to the common on your cylinder stat
CH on should be wired to the common on your room stat
CH off you won't need.
HW off you may need if you have a 3 port valve instead off 2x 2 port valves. If you do have a 3 port valve, it should be wired up to the grey wire on your 3 port valve. Don't quote me as some valves use different coloured wires.
HW on should be wired to the common on your cylinder stat
CH on should be wired to the common on your room stat
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