Best method with Vaillant Ecotech Plus condensing boiler

[cosmo70]

Hello everybody,

I have the Vaillant Ecotech Plus boiler with thermostatic valves on the radiators.

What do you recommend to optimize consumption and reduce waste:

- Turn on when you're at home, turn off when you're out
- Always keep the VSmart at a fixed temperature so that it unplugs and plugs back in at least 0.3 degrees below the desired temperature
- Always keep the VSmart at an unattainable temperature (boiler on 24h) and regulate the rooms with the thermostatic valves

Thanks for your help

 

[Swwils]

Make sure your control is actually wired and working in a compensation mode.

Leave the heating ON when out, but at a sensible setback temperature.

TRVs on the rooms should just be overheat cutoffs.

 

[cosmo70]

many thanks for your reply,

so you recommend the first option (turn on when in, turn off when out), right?
I set 20.5 when in and 19.5 when out and night.

I attach the histogram.

what do you think?

 

[Swwils]

19.5 might be a little high for a set back temperature. Start around 18 and go from there. But it depends on the home and what your prefer.

 

[cosmo70]

I try with 19° otherwise T goes too low and the boiler will stay ON longer.
Have you took a look at the graph of the heating operations that I have attached? what do you think?