Boiler trigger is 12V, but UFH outputs 230V Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[Haggles]

We have self installed under floor heating down stairs and kept our radiators upstairs. Last month we got our electrician in to connect the systems together, so the UFH system would trigger the boiler to turn on.

Unfortunately he discovered the UFH outputs a 230V signal but the combi boiler accepts a 12V signal. He managed to coble something together by kind of bypassing the boiler time clock (I'm even less sure of what exactly he did now than I was then) but it means the heating HAS to be on downstairs to have the radiators on upstairs. This is a pain and a waste so my dad wants to get him back in to disconnect the whole thing.

Is there any way to step down the trigger from one system to the other? Would a simple AC/DC power brick (like for laptops) work?

Any thought would be welcome. Thanks.

[Dick Puller]

A lot of times mate it's done with a relay or the micro switch on a zone(two port valve). Fairly simple to do for a good Spark. There's no reason why you can't control either on their own, I'd say your Spark was a bit lost, so try another one.