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Hi, could anyone please tell me how to wire in a new 3 way valve? The problem i have is that the new one (Horstmann Zoneplus Z322) has orange, blue, grey and white wires, the old one has green, brown, white, blue and black wires. Is there any way i can find out where the new wires go? Thank...

Hi i am trying to fit a Drayton HTS3 stat to replace an old ACL one that dosent seem to be working. My problem is the wiring and how i can find out where each wire goes. The old stat has 4 wires going to it and the new stat has only 3 terminals Call to heat, Statisfied and Common, is there any...