Baxi duo-tec 33 combi ErP and open therm

[Krystiano]

hi all.

I have a question for you. I have a boiler as in the title and does this boiler support opentherm???
I have a Google nest thermostat gen3 and after connecting it shows an error that did not find this opentherm. When I connect under on off it works but I want to connect under opentherm.

Thank you for any answers

 

[RandomGrinch]

I'm afraid I cant find any mention of OpenTherm compatibility in the Baxi duo-tec manuals - how old is the boiler?
Even if it did support OpenTherm, the boiler would have a different, (extra) low voltage terminal block specifically to connect it.
It sounds as if you have attempted to use a cable connected to the boilers "On Off" terminals, to join to the OT terminals on the Nest Heatlink - this would not be a good idea!

 

[Krystiano]

Thank you for answer. I have no idea how old is the boiler. (Replaced in 2019 year I think)
I just brought the house and this boiler was already there.

Same me I can’t find any information about opentherm on this boiler.
Also I can’t see any extra low voltage terminal block.
Thank you .
I think I can’t connect like I want.