Now that we have finished the heating program for the screed, we wonder why the heating is every 5 hours in to burnout, and then the burner restart. With this problem we seem to not be alone: a brief search on Google promotes interesting information to light:
When installed VIESSMANN Vitolig 300 type VL3A - identical to the way the wind Hager BioTherm - the burner off after a negative boiler setpoint jump of> 10 K permanently stored. Thus, after a hot water heating, the storage set value + = 30K is boiler set point, a burner shutdown Take place if at the same low set point requirements (+ differential temperature) pending the heating circuits.
The setpoint increase (+30 K) for water heating is also permanent and can not be parameterized.
results basically fixed target "burners with Setpoint Change> 10 K" from the request to the overheating of the boiler. should be prevented by turning off the burner, the boiler temperature to the safety temperature (95 ° C Safety) increases. Especially after the hot water then with little loss, ie little circulation in the boiler can be a strong rise in temperature, but the burner is on low load. Even after the The burner is discharged into the Ausbrandphase still for several minutes heat to the boiler. These requirements are permanently stored in the boiler control and are not performance-based differentiated not adjustable, which here would be required.
Now, in the Vitolig 300 with only 10 kW that argument difficult to understand because the Nachheizleistung is relatively low in the Ausbrandphase.
I'm going to involve the heating company, because this problem should be well resolved in software versions> 2.10. Of course, we have version 2.10, how could it be otherwise?
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