drayton wiser, how can roomstat and radiatorstat work together

[fixitflav]

Good news on this thread.
I finally got to talk to a Drayton engineer, not the help desk. It turns out that each radiator stat works very similar to the room stat. This means that if the room stat has turned the boiler off then a room with a radiator stat need heating up the rad stat will send a signal to the hub to CALL FOR HEAT from the boiler. Each rad stat works as a zone and will call for heat regardless of any other zone including one monitored by a room stat. Its important to have A TRV or better still a rad stat in the same room as the room stat. This is because if various rooms are calling for heat reaching the set temperature in the room stat room will not switch the boiler off and the room will over heat. Install rads stats in this room to switch off the radiators while the other rooms do their thing!

Interesting. It sounds like your radstats aren't "traditional" TRVs like mine (which just close above set temp, no electrical contacts). But if there is a radstat in every room you don't need a roomstat at all, do you?

 

[Bogart]

What I was thinking as each trv is in effect a room stat.

 

[John Driscoll]

Exactamundo! If you understand some of the basics of electrics its like all the TRVs and the roomstat are in parallel wirelessly to the hub so any one of them will call the boiler. What I thought before was that all the TRVs where in parallel but then connected in series with the roomstat so if the roomstat switched off the TVRs were isolated, not so!