lesmue79
2021-12-24 10:58:00
- #1
Currently, I am planning to remove the overcurrent valve from my heat pump with underfloor heating, but now an acquaintance who is a heating engineer has unsettled me and said that this is nonsense and I should leave the [ÜSV] as well as the [ERR] in.
The following applies to the system:
Max. nominal volume flow heat pump:
at 5K = 540 l/h
Underfloor heating hydraulics calculated at ~ 850 l/h with a pressure loss of 100 mbar
max. [ÜSV] response pressure ~ 300 mbar
Lowest delivery head of the heating pump 400 mbar at ~ 1000 l/h; only from about 1000 l/h does the delivery head drop, e.g., down to 380 mbar.
If I open all heating circuits fully without throttling anything, I manage max. 700 liters in the heating circuit. If I then go and at least throttle some short heating circuits, the pump always hovers around 610 l/h.
Therefore, I believe that the minimum delivery pressure of the UWP is already so high that despite the pressure loss in the heating circuit, the overcurrent valve always opens, and I therefore never achieve the maximum possible volume flow in the heating circuit or heating circuit manifold.
Pump pushes up to just under 1000 l/h:
400 mbar minus 100 mbar for the worst heating circuit leaves 300 mbar up to 1000 l/h; but the [ÜSV] already opens at 300 mbar.
Regarding the theory, the acquaintance said that this is nonsense and unnecessary to remove the [ÜSV] because my system is already running optimally, and that I would now try to turn the smallest adjustment screws only to optimize the system to death?
Am I now on the wrong track or is there a spark of truth in my thoughts? Or has my acquaintance rightly unsettled me? Otherwise, I wanted to deactivate the [ÜSV] between the years.
The following applies to the system:
Max. nominal volume flow heat pump:
at 5K = 540 l/h
Underfloor heating hydraulics calculated at ~ 850 l/h with a pressure loss of 100 mbar
max. [ÜSV] response pressure ~ 300 mbar
Lowest delivery head of the heating pump 400 mbar at ~ 1000 l/h; only from about 1000 l/h does the delivery head drop, e.g., down to 380 mbar.
If I open all heating circuits fully without throttling anything, I manage max. 700 liters in the heating circuit. If I then go and at least throttle some short heating circuits, the pump always hovers around 610 l/h.
Therefore, I believe that the minimum delivery pressure of the UWP is already so high that despite the pressure loss in the heating circuit, the overcurrent valve always opens, and I therefore never achieve the maximum possible volume flow in the heating circuit or heating circuit manifold.
Pump pushes up to just under 1000 l/h:
400 mbar minus 100 mbar for the worst heating circuit leaves 300 mbar up to 1000 l/h; but the [ÜSV] already opens at 300 mbar.
Regarding the theory, the acquaintance said that this is nonsense and unnecessary to remove the [ÜSV] because my system is already running optimally, and that I would now try to turn the smallest adjustment screws only to optimize the system to death?
Am I now on the wrong track or is there a spark of truth in my thoughts? Or has my acquaintance rightly unsettled me? Otherwise, I wanted to deactivate the [ÜSV] between the years.