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armyash

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See pic. Current 3 port is a sunvic dm5601.

No grey wire on existing just orange, white, yellow, blue and earth?

Will a honeywell be able to be wired up here? I can't find a wiring guide for this model of sunvic.
 
Grey pushes fully over with white to heating only. Can heating only currently be selected on the programme or is it wired hot water only and heating and hot water? Grey needs to go to hw off and cylinder stat satisfied.
 
Ch and hw both controlled by the programmer. Hw hasn't been working.

Looks like I might have to rewire. Not familiar with these satchwell wiring centres.

I need to know what the existing wires are on the sunvic.
 
There’s wiring dia on line google the model number

I did look but couldn't find what I needed. All filled up and got ch and hw but there something not quite right.
Going to leave as is and come back and rewire in a couple of days.
 

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