Air-water heat pump flow temperatures

I have that one too :D. I just reduced the parallel shift by 0.5 degrees. Let's see. At minus 15, it shows me 28.5 calculated return flow. That should correspond to 31 to 32 degrees V. But it never gets that cold.

Okay, if your house actually only has a heating load of 2.8 kW, it's no wonder that it can't get rid of the heat and cycles on and off.

However, the 2.8 kW do not match KFW 55 and the flow temperature.

Has anything else been done in addition?

Yes, there is an 18-liter mini buffer in the return flow that is supposed to somehow provide the minimum defrost energy... Unfortunately, I couldn't avoid it because of the [GU].

I can usually still limit the current consumption of the compressor but as a layman, I'm not confident to do that (among other things because of warranty, guarantee).

you also have a buffer? How did you solve this ordeal ?

Based on the cold outside temperatures, I have the system running since last night with a 0.10 heating curve (can’t go lower) and 25°C flow temperature; the only interruption was the domestic hot water preparation. Currently around 20°C + 21°C in the rooms. However, I have adjusted the heating circuits again and hope that it will get warmer in the bathroom.

In addition, I now hope that when I take a closer look at the heating circuit pump tomorrow, it is set to variable flow rate and not constant flow rate, and if I switch it, I will get even more flow in the heating circuits.