Installing... no black cable?
I'm in the midst of installing the older extension kit (so to have OpenTherm support) onto my Baxi 830 boiler.
The app instructions are advising me to insulate/cover the blue and brown cables as I'll only need the grey and black. However the cable in the box with my extension kit has no black cable... any ideas?
I do have the cable from the wireless starter kit (v3) that I could use and has all 4 cores...
Steve
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Just use any sort of bell wire, it really doesn’t matter with a digital connection. No polarity either.1