Recently had one of these fitted with a new combi system but there weren't any instructions in the box, the fitters didn't know how and downloading pdfs from the invensys website
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isn't working for me.
First thing I figured out was the SCR override to turn the ch on/off. Took a bit longer but I've also got the RF3 programmed and happily talking to the SCR. The outstanding mystery is what the SCR learn mode is about.
Anyone know?
-A