Vaillant ecoTec 831 Plus and Nest - Flow Temperature

[lloydio]

The manual says the EcoTEC 831 plus has a heating output of 9-24kW.

 

[mr. shr]

Hmm I can't really think of anything else to suggest. Seems like you'd already covered all the things I know.
Is yours a systerm or combi?

I don't think d.5 is an adjustable setting. I think it's a read out of the flow temp the boiler is trying to achieve: if you have a smart contoller the value is received via ebus. If you have an on/off arrangement (like yours) then my understanding is the value comes from what ever the rotary dial on the boiler is set to.

 

[Harvest Fields]

It cant modulate the boiler if its on a vaillant which doesnt have open therm though. It can only switch it on or off. It wouldnt be able to control the modulation or the flow temperature. Not so smart after all hey.

Vaillant’s work on Ebus not OT so you need to use Vaillant controls to get the full benefits

 

[Ctrl-Alt-Elite]

Hi Icezebra - I have the same issue, with same Vailant thermostat being replaced by Nest V3 and 55 degree flow temps!

I cannot see the wireless receiver you're talking about - where/how exactly did you remove this?

Much appreciated 🙂

Cheers!

 

[Vee]

Remote access is available with the Internet Version of the Vsmart. Far superior to Nest.

 

[mr. shr]

Hi Icezebra - I have the same issue, with same Vailant thermostat being replaced by Nest V3 and 55 degree flow temps!

I cannot see the wireless receiver you're talking about - where/how exactly did you remove this?

Much appreciated 🙂

Cheers!

I think it's plugged into the front of the boiler?

Can I ask why you changed to the Nest system?