I have an S Plan system with a Honeywell CM67 programmable room stat. When I installed the CM67 in 2004, I used two of the four wires coming from the wiring centre: red (live, A) and yellow (switch live, B). Blue (neutral) wasn't needed as the stat is powered from battery, and I taped this, along with the earth. All works perfectly.
However, the stat is poorly located and I'd like to upgrade to a CM927 wireless base unit and stat, with the base unit in the same place as the CM67 currently is.
Question: since the CM927 base unit requires power (N-L on wiring diagram from Honeywell website) as well as live and switch live (A-B), how do wire this? I have one live, but require two: can I bridge between the L and A terminals in the CM927?
Any advice gratefully received.
However, the stat is poorly located and I'd like to upgrade to a CM927 wireless base unit and stat, with the base unit in the same place as the CM67 currently is.
Question: since the CM927 base unit requires power (N-L on wiring diagram from Honeywell website) as well as live and switch live (A-B), how do wire this? I have one live, but require two: can I bridge between the L and A terminals in the CM927?
Any advice gratefully received.