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Nef
Airhead
BigH
First question in my mind is why is the red sleeved wire connected to earth. That is the last colour I would want earth to be shielded with.
Also seems likely to me if you have one wire for HW call for heat and one for CH call for heat you want to connect those to terminals 3 & 4 HW On & CH ON.
But if that red sleeved wire really is earth, please get some yellow and green tape or sleeving to cover it with.