ᐅ Setting Up Gas Condensing Boiler Junkers Cerapurmodul ZBS 14
Created on: 4 Feb 2019 21:32
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Goldi09111
Hello everyone,
we need your help or advice again. After living in the house for about 2 months and starting to familiarize myself with the heating system, I noticed that the boiler cycles very frequently, and I can’t really get it under control.
A brief overview of the conditions: we have about 150m2 (1,615 ft2) heated by underfloor heating connected to a "Junkers Cerapurmodul zbs 14/100 s3 ma 23" boiler.
I have set the base point at 27°C (81°F) and the return point at 46°C (115°F). The thermostat in the living room is set to level 4 out of 6, and the temperature is around 21°C (70°F)—not overly warm, but comfortably cozy (occasionally we use the fireplace).
Now, regarding the issue: we have about 100 to 150 burner starts per day. I’ve read from others that they only have about 5 to 10. What could be wrong here? By the way, we have experienced outdoor temperatures ranging from +5°C to -10°C (41°F to 14°F) in the last 4 weeks.
we need your help or advice again. After living in the house for about 2 months and starting to familiarize myself with the heating system, I noticed that the boiler cycles very frequently, and I can’t really get it under control.
A brief overview of the conditions: we have about 150m2 (1,615 ft2) heated by underfloor heating connected to a "Junkers Cerapurmodul zbs 14/100 s3 ma 23" boiler.
I have set the base point at 27°C (81°F) and the return point at 46°C (115°F). The thermostat in the living room is set to level 4 out of 6, and the temperature is around 21°C (70°F)—not overly warm, but comfortably cozy (occasionally we use the fireplace).
Now, regarding the issue: we have about 100 to 150 burner starts per day. I’ve read from others that they only have about 5 to 10. What could be wrong here? By the way, we have experienced outdoor temperatures ranging from +5°C to -10°C (41°F to 14°F) in the last 4 weeks.
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Obstlerbaum5 Feb 2019 09:41Take a look at the actual supply temperature the heating system is receiving. Besides the high storage temperature, this can also cause frequent cycling. How much hysteresis do you allow for the hot water tank before reheating starts?
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Goldi091116 Feb 2019 06:59Obstlerbaum schrieb:
Take a look at the actual flow temperature the heating system is receiving. Besides the high storage temperature, this can also cause frequent cycling. How much hysteresis do you allow for the hot water tank before reheating starts?Where can I find these two pieces of information?
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Obstlerbaum7 Feb 2019 18:02Goldi09111 schrieb:
Where can I find the two pieces of information? There should actually be thermometers on the supply and return pipes.
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Goldi091117 Feb 2019 20:37Obstlerbaum schrieb:
There should actually be thermometers on the supply and return pipes.There are no thermometers on the pipes (see pictures).
I adjusted the heating temperature from 19.5 to 20.5°C (67.1 to 68.9°F) and set the heating curve endpoint from 44 to 42°C (111.2 to 107.6°F) and the base point from 27 to 24°C (80.6 to 75.2°F).
Additionally, I set the heating times back to 4:00 AM – 8:00 PM. After switching to continuous operation on Monday evening, the heating cycles increased from about 100 per day to 200.
I stood next to the heating system for a few minutes just now, and it turns on and then shuts off again after about 10 seconds—completely pointless.
Is the last image with the pump post-run time of 6 minutes okay?
Thank you all so much!
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