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    Replaceing BGWR1 with Nest 3rd Gen

    Hi All, I thought my query had been answered before, but when I took the cover off the BG WR1 (Drayton Digistat RF) the wiring configuration wasn’t quite as I expected. My system is a Worcester Greenstar 30si Combi for both water and heat. The mains power comes through an MCB and into the...