Recent content by renard

I am looking at it because a temporary fix was made to it at Christmas so that when the hot water came on, the heating would also come on. The fixer, not me, said there were not enough wires, and has put a 'jump' between the brown hot water wire and the brown central heating wire and taken...

The white wire comes from the system, not the valves. My confusion is that the actual wiring doesn't look like the wiring diagrams I have seen.

It is a Potterton Suprima 40.

Looking for some help. I have got a two 2 port Zone S-plan central heating system. Looking at standard wiring diagrams, the orange cables from the two valves connect to the SL boiler and L pump. On my system my two orange cables attach to a white wire only, which gets power from the...