Thanks mate, I understand the switch part at a and b, could the existing not be used for T1 and T2 and alter at the wiring center though? Sort of how I thought in post #8?
Nest Thermostat Gen 3 Dual Zone Install
- Thread starter MatthewM
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yes mate the wires in A&B could be used to power the nest thermostat, as long as they were totally disconnected at the wiring centre, and moved to the Heat link, at T1 and T2, and all new wiring will be required between the wiring centre and the heat link, not what the OP asked though, a bit above general DIY competence, if all the OP wants to do is use the existing 2 cores at A&B to power the thermostat then of course he can use that, but the Heat link will have to be wired into the wiring centre with 5 cores between the Wiring centre and the Heat link, as well as the two existing cores to power the thermostat
I need to do exactly this and I’m not sure how there is a misunderstanding. I included a link to a thread where someone had done this install.
Because you wrote this
Because the two wires in A&B are NOT L&N as you say, they are SWITCHING wires, there is no Neutral
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Got it. That makes sense. It also raises the other point about power to the stat as if they are switching wires only will they power the stat?
If they are taken to the heat link yes, otherwise they will be mains switching as Ian has pointed out
So I suppose the question then is aside from the terminology point Ian has made, was my initial post/plan correct please?
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