Open therm stat

[Fallout]

Will this stat swap for an open therm stat. Or is open therm low voltage/ open therm will need another wire taking back from the boiler to the receiver with low voltage? Thank you

 

[CountryFan]

You could change it, but the connections at the boiler end need to be changed to OT.

 

[Fallout]

Thanks I know open therm modulates the boiler down when it is close to the desired room temperature. Is this similar to load compensation? Which most new stats are now?

 

[CountryFan]

Aye, similar to load compensation but I believe it’s supposed to be better.

 

[Fallout]

Thank how do you wire the open therm then, take a separate low voltage 2 core back from the open therm ports onto he boiler? This being a 2016 boiler, may not be open therm compatible?

 

[CountryFan]

Thank how do you wire the open therm then, take a separate low voltage 2 core back from the open therm ports onto he boiler?

Ideally yes, as the way it is now could introduce induced voltage

This being a 2016 boiler, may not be open therm compatible?

Opentherm has been around since 1996. Why ask about it then if you’re unsure if the boiler supports it? What make and model is it?

 

[Fallout]

Ideally yes, as the way it is now could introduce induced voltage

Opentherm has been around since 1996. Why ask about it then if you’re unsure if the boiler supports it? What make and model is it?

It's an ideal vogue 2016

 

[Fallout]

Looking at the stat eph4 is it workable without open therm? And can add this later

 

[ericmark]

@Stuckinarut will know far better than me, I am only an electrician, but the main problem is for a boiler to modulate it does not want switching on/off all the time.

In the main, the TRV works well. But it can't, unless linked, tell the boiler it's not required any more, to turn it fully off. But to set up a wall thermostat with a TRV so they work together is not as easy as it seems, and it is so dependent on the home.

Since getting married, I have lived in four homes, each one very different as to heating requirements. Two, a single wall thermostat worked well, the other two both have needed multi wall thermostats to control the heating. This house has three wall thermostats, plus a linked TRV head. There is no one system suits all.

I did with some success fit a wall thermostat and TRV in my mother's hall, and set them to work together, but it was not easy, and it was far simpler in this house, just fitted Drayton Wiser linked TRV head, OK still some problems, with radiator next to outside wall, but as I said, every home is different.

 

[CountryFan]

Looking at the stat eph4 is it workable without open therm?

Yes

And can add this later

Yes