Basti2709
2020-03-02 14:41:08
- #1
My gas boiler fired up every 3 minutes... then heated for 1 minute and shut off again... The flow temperature was, for example, 20 degrees and the boiler fires up... then it heats the water to over 30 degrees within just under a minute and shuts off because the setpoint has been reached or even exceeded... it really only heats longer if all heating circuits are open, but even then it shuts off after a few minutes. As soon as the heating turns off, you can see the temperature in the flow rapidly drop again = the result is the boiler firing up again after a short time.
Modulation doesn’t occur at all because that always takes a certain amount of time. And even if it did, the 7 kW are still higher than the heating load of the house...
I have now activated a cycle lock (every 10 minutes) and monitored the temperature in the house. There is a constant 22.5 degrees in every room (my wife wants it that way) and we pay 70 euros per month for gas. I can live with that now... but I think there is still potential for savings.
Also, about 100 burner starts per day can’t be good for the heating system...
Nice anecdote: To heat up the screed, the boiler program ran at "full throttle" for about 3 weeks. My utility company’s bill for the period from mid-November to the end of December showed about 900 m³ gas consumption. The utility company’s woman said, that’s very good for a single-family house per year... until I told her it was only 1.5 months. And indeed, my annual consumption now amounts to about 950-1,000 m³ per year...
Modulation doesn’t occur at all because that always takes a certain amount of time. And even if it did, the 7 kW are still higher than the heating load of the house...
I have now activated a cycle lock (every 10 minutes) and monitored the temperature in the house. There is a constant 22.5 degrees in every room (my wife wants it that way) and we pay 70 euros per month for gas. I can live with that now... but I think there is still potential for savings.
Also, about 100 burner starts per day can’t be good for the heating system...
Nice anecdote: To heat up the screed, the boiler program ran at "full throttle" for about 3 weeks. My utility company’s bill for the period from mid-November to the end of December showed about 900 m³ gas consumption. The utility company’s woman said, that’s very good for a single-family house per year... until I told her it was only 1.5 months. And indeed, my annual consumption now amounts to about 950-1,000 m³ per year...