Here's a few different ways of wiring a room stat. Wiring in general tends to throw a lot of engineers and the different labelling of terminals can add to the confusion. Hopefully this video helps simplify things a bit.
This makes it easy to understand, but I'm still confused with my wired stat which I need to bridge to be permanently on so my TADO can take over. My wired stat has a LIVE, a SATISFY and a DEMAND - which do I need to bridge to make it permanently on? It's a STT RSL. Thanks, Pat.
Tado says it all unfortunately, I've not had much success with it and neither have many customers I know as well. It needs looking at with experience in heating wiring