Hi - dramatic title but I'm fitting an Evohome HW and HTG smart thermostat/TRV/relay system.
When I traced all the wires to the programmer and beyond I found that the HW normally-closed pin in the programmer had a wire attached to it. It was linked to permanent Live and had a red sleeve on it (old wiring). I can tell because it is also linked via the control centre back to Live on programmer and live on the zone valves. Is this right and why?? Any theories?
I have a Maxiflo with Baxi boiler in S-Plan with 2x zone valves.
When I traced all the wires to the programmer and beyond I found that the HW normally-closed pin in the programmer had a wire attached to it. It was linked to permanent Live and had a red sleeve on it (old wiring). I can tell because it is also linked via the control centre back to Live on programmer and live on the zone valves. Is this right and why?? Any theories?
I have a Maxiflo with Baxi boiler in S-Plan with 2x zone valves.