Hi all, I've been trawling the Internet for advice and came across this forum which looks like it's full of helpful and knowledgeable people! We've also tried contacting Vaillant but advice has been inconsistent and I'm not sure it's been altogether helpful.
We had a new Vaillant combi boiler installed in September, along with new radiators and the vsmart thermostat / app. The radiators do get hot and the house is warm. The thermostat is in the hallway on an internal wall. The thermostat works on weather compensation controls and predicts when to turn the boiler on so that the house is up to temp (set at 19 degrees) by the desired time. Our problems are as follows:
1. On a cold morning, such as yesterday, the heating comes on up to 3 hours before the desired time so I'm having to set the desired time later, which seems crazy. Yesterday the desired time was 9am, the heating came on at 7.01 and reached temp at 10.09. Now, really our desired temp should have been 7am but there's no way we want the heating coming on at 4am or even 5am. Does this sound right??? I just can't accept that it's normal for the heating to come on 3 hours before the desired time. We don't want to be sweating in our beds every morning.
2. After researching, we increased the heating curve from 0.9 (Vaillant advised 0.7) to 1.7 but this morning the heating still came on 2 hours before the desired time but this morning it had reached the desired time an hour early. (We had this happen a couple of months ago, Vaillant told us to set the heating curve back to 0.7, set the algorithm to basic / hysteresis and turn heat prediction on (they had previously told us to override heat prediction and use it as a normal boiler). I also reset our weekly schedule by going through the questionnaire on times we get up, go to bed, etc. again and things were a lot better until the mornings turned frosty when it's coming on 3 hours early.....
I hope I'm explaining this well enough, it's all a bit foreign to us and we really need some good solid advice.
Please could anyone advise us on whether this sounds normal, what settings should we use (heating curve, algorithm) and any other advice? Thank you in advance.
SparkeyD
We had a new Vaillant combi boiler installed in September, along with new radiators and the vsmart thermostat / app. The radiators do get hot and the house is warm. The thermostat is in the hallway on an internal wall. The thermostat works on weather compensation controls and predicts when to turn the boiler on so that the house is up to temp (set at 19 degrees) by the desired time. Our problems are as follows:
1. On a cold morning, such as yesterday, the heating comes on up to 3 hours before the desired time so I'm having to set the desired time later, which seems crazy. Yesterday the desired time was 9am, the heating came on at 7.01 and reached temp at 10.09. Now, really our desired temp should have been 7am but there's no way we want the heating coming on at 4am or even 5am. Does this sound right??? I just can't accept that it's normal for the heating to come on 3 hours before the desired time. We don't want to be sweating in our beds every morning.
2. After researching, we increased the heating curve from 0.9 (Vaillant advised 0.7) to 1.7 but this morning the heating still came on 2 hours before the desired time but this morning it had reached the desired time an hour early. (We had this happen a couple of months ago, Vaillant told us to set the heating curve back to 0.7, set the algorithm to basic / hysteresis and turn heat prediction on (they had previously told us to override heat prediction and use it as a normal boiler). I also reset our weekly schedule by going through the questionnaire on times we get up, go to bed, etc. again and things were a lot better until the mornings turned frosty when it's coming on 3 hours early.....
I hope I'm explaining this well enough, it's all a bit foreign to us and we really need some good solid advice.
Please could anyone advise us on whether this sounds normal, what settings should we use (heating curve, algorithm) and any other advice? Thank you in advance.
SparkeyD