Hi guys,
I'm new to this forum so please excuse (what you may find) potential trivial questions.
I run a system composed of a Viesmann Vitopend 222 combi-boiler, controlled by an Evohome system (simple setup with 1 BDR91 controlling the boiler and only 1 HR92-as, for the moment, I'm trying to understand how this system works).
What I observed by long monitoring is that the boiler is continuously cycled every 10min (in the proportional band). Except some initial overshoot when the system was forced to keep the boiler off for apr. 1h there is no single observation of any cycle skipping. It regularly fires every 10min. This is because the HR92 will almost never close completely (in fact the minimum valve position I have observed is apr. 20%) so it continuously ask for heat. My first question is if this behavior is normal or there is something wrong with my particular setup.
If this behavior is normal, do you think it can have an impact on the life time of the boiler itself? I don't think it is easy for the boiler being fired so often. On top, in my particular case, there is quite a long overrun time of the circulating pump(~10min) . Overall result is that the pump will run continuously.
I thank you very much for the support and I wish you to have a happy and successful New Year!
I'm new to this forum so please excuse (what you may find) potential trivial questions.
I run a system composed of a Viesmann Vitopend 222 combi-boiler, controlled by an Evohome system (simple setup with 1 BDR91 controlling the boiler and only 1 HR92-as, for the moment, I'm trying to understand how this system works).
What I observed by long monitoring is that the boiler is continuously cycled every 10min (in the proportional band). Except some initial overshoot when the system was forced to keep the boiler off for apr. 1h there is no single observation of any cycle skipping. It regularly fires every 10min. This is because the HR92 will almost never close completely (in fact the minimum valve position I have observed is apr. 20%) so it continuously ask for heat. My first question is if this behavior is normal or there is something wrong with my particular setup.
If this behavior is normal, do you think it can have an impact on the life time of the boiler itself? I don't think it is easy for the boiler being fired so often. On top, in my particular case, there is quite a long overrun time of the circulating pump(~10min) . Overall result is that the pump will run continuously.
I thank you very much for the support and I wish you to have a happy and successful New Year!
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