Vaillant ecoTEC settings for use with vSmart and VR66 wiring centre?

[fezster]

I've no personal experience of weather compensation, but my understanding is that you let it learn the profile, and then adjust it by a notch or two if you find that a) the house is not heating up quickly enough, or b) it's unable to get to temperature on the coldest days.

 

[Matthew Butt]

I've no personal experience of weather compensation, but my understanding is that you let it learn the profile, and then adjust it by a notch or two if you find that a) the house is not heating up quickly enough, or b) it's unable to get to temperature on the coldest days.

OK. That makes sense.

 

[Matthew Butt]

An update...
We've now had our system up and running for a week (i.e. halfway through the 2-week "learning period". We had a message via the app last weekend to tell us it had switched to the advanced algorithm. The automatically set heating curve has dropped from 2.6 to 0.9, which probably sounds about right for a well-insulated modern house.
The temperatures are still a bit up-and-down, (ranging from 17.9 to 18.3 with setpoint at 18), but that's not too bad, and we're hoping it will settled down further. We're just a bit surprised that the boiler tends to ramp up to a flow temperature of over 60 (even with hot water switched off), when we thought it was supposed to run more continually and keep the flow temperature lower for the heating operation.
As you and Vaillant suggested, we've got the flow temperatures set to the max value in the default range, hoping the system can work out what it actually needs.

 

[John Mathews]

My previous experience with my ecotec plus 831 is that if/when it loses connection with the thermostat (which it did about four times per year) the boiler will continue running until it's internal flow thermostat setting is reached. As the manual advises you to set this to maximum, my house reached 30 degrees while I was on holiday in the middle of February. So any saving from having a modern thermostat were quickly lost. I am of the understanding that even with my new vsmart thermostat, the boiler will still default to the same situation. Hopefully the Vsmart will not disconnect as often as the previous model that I have replaced.

 

[doitmyself]

The temperatures are still a bit up-and-down, (ranging from 17.9 to 18.3 with setpoint at 18), but that's not too bad, and we're hoping it will settled down further.

That could be because the vSmart does not get its outside temperature information from a sensor on the outside wall of your house but over the internet from a 'local' weather station, which could be miles from where you live and not representative of your local micro-climate.