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Thanks gent for the help and advice. Managed to get it all connected and everything is working fine. The only issue I now face is the antifreeze protection that runs when the temperature falls below 5 degrees. The pump in the boiler constantly runs, even when there's no demand. Normally the...

Apologies, that backplate is part of the underfloor heating for the smart hub switch. I have done some further digging and found some further info on the Immergas website for the wiring, still doesn't explain what 25 and 24 do but does show 1 and 2 for a room stat to be added. There is a...

Thanks for taking your timeout and giving me the feedback and info, some very useful stuff there that I can learn from. The thermostat for the rads was the Alpha Smartec one, where you control pretty much everything for the boiler/ heat pump within. The 'other engineer' that was meant to come...

Thanks for the response. It's not a customers house so it's not too much of a problem. In terms of messiness, what is your advice on cleaning it up and making it better? How do I go about wiring this up to make it all work? I do appreciate you guys taking time out and responding.

Hi all, I've been struggling to wire up a Alpha Etec 33 hybrid to an S-plan so I can incorporate 2x 2 zone valves for central heating and underfloor heating. Alpha technical haven't been much help and the engineer they put me in contact with no longer replies to any messages. All he advised was...