Properly setting the air-to-water heat pump with underfloor heating

It's up to you. Either demand the calculation or pen, paper, and calculator.

However, it probably isn't worth turning everything upside down just yet. In the second or third winter, electricity consumption will decrease a bit more. I would observe the whole thing for a few more months.

As often as this question has come up in the last few days, maybe no one takes the trouble to write down the steps for the hydraulic balancing. So that even beginners understand it.

Very good idea. I would be totally interested in that. Probably many people are dealing with it right now because it really should become winter now.

The valves on the HKV should be roughly set according to calculation (the better the calculation, the less work). The actuators should be either completely off or powered open.

Then fine adjustments for the flow can be made on the valves.

I don't think anything was calculated here. Nothing has been set so far either.

As it seems, there is no calculation. At least none was handed over. If there is no documentation, it will be difficult. How should he now obtain important information about pipe length, connection line length, laying distance, pipe diameter, connection of the HKV, when the screed is already laid? He cannot calculate himself how the flow in the heating circuit should be! Only option is to measure return temperature and room temperature with ERR fully open (or actuators removed). If room temperature is the same everywhere and return temperature approximately the same, the hydraulic balancing is correct and he can proceed with the thermal balancing. But the total volume flow must be sufficient for the heat pump! Unfortunately, this is often not taken into account in the calculation of the hydraulics, not even by professionals. They mostly only rely on assumptions and neither calculate the heating load for each room at the desired room temperature specified by the owner, nor do they consider the heat pump used (nominal volume flow!)... Equally not by the homeowners, who repeatedly cut the volume flow to the heat pump through the used ERR and thus cause it to cycle inefficiently to death.

Some tips can be found in a parallel thread:
"Underfloor heating, it gets so warm in the house when the sun shines"

Since this question has come up so often in the last few days, maybe someone could take the trouble to write down the steps for the hydraulic balancing. So that even beginners can understand it.

Yes, that's true. The thread " " is probably about the same topic.

If one or two heating professionals would team up and write a pinned tutorial that is also understandable for beginners - that would be AWESOME