Connecting thermostats in parallel

[Bob-RN]

Hello,
Looking for advice on whether it's possible to wire two boiler relay box connections in parallel.
I have Evohome installed on a Vaillant EcoTEC plus 831 R2 boiler using 3 x HR92 TRV's at the moment. I would like to install further HR92's but can't run to that expense just yet.

As an alternative room control I am thinking about using a spare wireless thermostat to control the temp downstairs.
I know there is a Honeywell Room stat (FPP12216) available but that runs in place of the HR92's. (and costs about the same as a single HR92)

The question is, if I wire the C and N/O of each control box in parallel, is that going to work?

Thanks,
Bob

 

[Swwils]

Yes you can run in parallel with the right arrangement but often it is better to get it all sorted at once.

 

[ericmark]

Yes that is what I had for mothers house, wind direction and sun would swap which end of house was the coolest, so had a thermostat both ends, worked well.

I thought EvoHome would take more TRV's anyway

seems to show 6 but never had EvoHome, although considered one of the best, never had the money, would love to hear how well it works.

 

[Bob-RN]

Many thanks for the replies. I have since discovered that the Evohome controller does in fact work as a zone thermostat. I knew it was supposed to, but it never worked, that is until I disconnected the WiFi and reconnected it.
So now I have the controller downstairs monitoring the temperature and the HR92 TRV's in other areas.
As soon as funds allow I intend to get more HR92's to give me full room control. (up to 12 zones I believe)

Thanks again,
Bob

 

[ericmark]

I made an error, I got Nest which is a bit useless, however I found the really cheap eQ-3 TRV's work well, paid £15 each in 2019, only down side bluetooth will only connect to one phone, so wife can't alter those on my phone except manually direct on the TRV.