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Thanks for the reply. Ill look to wire the Wiser into the control centre. It is a 3 channel version. Unfortunately no smart Trvs. Here is the wiring currently, are these standard colours?

Hi, I was trying to switch my boiler control and in my haste undid all the wires behind the boiler control unit. How do I reconnect them. So the new wiser unit can send demand for either HW or CH? The connector blocks restores power to the combi, there is a cylinder upstairs. 2 room...