Hello,
I am currently balancing our heating system in an end-terrace house, KfW55 standard, with a net living area of 145m² (1560 sq ft), using a Vaillant Arotherm 75/5. I believe I have understood the basic principle behind it, but I stumbled upon two points.
The heating output on the ground floor was generally too high. So, I initially reduced the flow rate on all circuits there a bit. It was also clear to see that reducing the flow on one heating circuit increased the flow on others. That makes sense. However, I assumed this would also affect the flow at the heating circuit manifold on the upper floor, but it doesn’t. Am I missing something? Is the flow on each heating circuit manifold adjusted independently? In the main bathroom (upper floor), I currently have about 1.6 liters per minute (0.42 US gallons per minute) set on the Taco valve, which is the maximum adjustable setting in the current configuration. I cannot increase it further. I would like to try whether 2 to 2.5 liters per minute (0.53 to 0.66 US gallons per minute) might deliver slightly higher temperatures.
Is it correct that the sum of all flow rates should roughly equal the flow rate of the pump on the Arotherm?
I am currently balancing our heating system in an end-terrace house, KfW55 standard, with a net living area of 145m² (1560 sq ft), using a Vaillant Arotherm 75/5. I believe I have understood the basic principle behind it, but I stumbled upon two points.
The heating output on the ground floor was generally too high. So, I initially reduced the flow rate on all circuits there a bit. It was also clear to see that reducing the flow on one heating circuit increased the flow on others. That makes sense. However, I assumed this would also affect the flow at the heating circuit manifold on the upper floor, but it doesn’t. Am I missing something? Is the flow on each heating circuit manifold adjusted independently? In the main bathroom (upper floor), I currently have about 1.6 liters per minute (0.42 US gallons per minute) set on the Taco valve, which is the maximum adjustable setting in the current configuration. I cannot increase it further. I would like to try whether 2 to 2.5 liters per minute (0.53 to 0.66 US gallons per minute) might deliver slightly higher temperatures.
Is it correct that the sum of all flow rates should roughly equal the flow rate of the pump on the Arotherm?
It was done by the developer, but the heating engineer said, "this is rubbish," did it differently (and better), and set the flow roughly to 1.5 l/min (0.4 gal/min) on all the heating circuits on the ground floor and about 1 l/min (0.26 gal/min) upstairs. So much for the work of the professionals!
J
Jesse Custer11 Jan 2024 11:45Pacmansh schrieb:
It was done by the builder, but the heating engineer said "this is rubbish," did it differently (better), and set roughly 1.5 liters per meter (0.5 gallons per foot) flow rate on all heating circuits on the ground floor and about 1 liter per meter (0.33 gallons per foot) upstairs. That says a lot about the work of the professionals!Can someone help me: what exactly does "1.5 liters per meter" or 1 liter per meter—i.e., l/m—refer to?
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