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No gurus out there to help on this one, anyway i've done it noe and it works.

I have had a Vaillant 837 fitted with a timeswitch 140 but no room stat. Am now looking to add a room stat, vailant doc's sat the VRT30 is compatible so I've brought a VRT 30 analogue stat. I've had a look at the documentation for connecting the stat and wanted to ask you guru's out there if...