Vaillant ecotec plus 831 boiler broblem

[gmartine]

Hi just been reading through your post, did the vaillant engineer solve your problem with his auto to 15kw change, were your radiators heating up quicker. I'm having a similar problem with a newly installed ecotec plus 832. Will call the installer but would be great on an update. thankyou

You may get a response but the thread is a year old, chances are it's okay or he would've reposted.

 

[stevecase51]

Hi just been reading through your post, did the vaillant engineer solve your problem with his auto to 15kw change, were your radiators heating up quicker. I'm having a similar problem with a newly installed ecotec plus 832. Will call the installer but would be great on an update. thankyou

Yes he did Heating has worked well - hope you get yours sorted

 

[rucky75]

Yes It did get sorted The engineer said the "auto" output setting often does not work well but seting D0 to 15kW was the answer

Thankyou for your reply, we are having exactly the same issue, heating taking 1/2 or more to get to the flow rate temp. Hot water fine, Installer is coming round next week, will mention your solution and take it from there. Again thanks

 

[ccarmock]

I have the same problem with an Ecotec plus 831 - . Was the fix setting D0 to 15 kW only or did you need more doing?

 

[rucky75]

I have the same problem with an Ecotec plus 831 - . Was the fix setting D0 to 15 kW only or did you need more doing?

Hi i lowered the DO down to 15, did'nt do anything else. Seem to solve problem. Scott

 

[MatthewHurt]

The VRT350F is a compensating control that will modulate the burner to achieve maximum efficiency during central heating operation. That does not mean that it will run full pelt, it may well run at minimum for an hour and should allow a very gradual heat up of the home, rather than running as a 'dum switch' which is either on 100% or off.
Adjusting the max heat load down to a fixed number just means that you've hindered the boilers ability to modulate and have effectively disconnected the main feature of your thermostat.
The D0 being set to auto is also a compensating feature, it means that you are able to use an old fashioned on/off thermostat, but set the boiler to modulate according to system demand.
It would be far more sensible to leave the boiler stat to do what it's built to do, and is often much cheaper to allow the boiler an extra hour or two to heat the house up by running at a very low rate, but if you're finding it takes far too long to heat the house then rather than setting D0 to a fixed number, you should adjust the heat curve of the controller (if a compensating control is fitted) to increase the boiler flow temperatures in relation to the given room temperature.