Brötje BWL Neo 8 - Problems with the setting

Don't worry about the cycling. Even if it cycles 15 times a day throughout the year (which it doesn't, since it only does WW in the summer), that thing lasts 25 years at 150,000 compressor starts!

If you say so... ;)
As it looks, the values here are similar.
What bothers me is the high heating curve. You mean I should disable the heating curve of the mixer. I'll do that after vacation and then we'll see...
Here are my current values:

Then try lowering the compressor speed (VDmod) at 0degC. The BLW does not modulate between maximum and minimum possible power. Rather, the heat pump operates according to the compressor curve and reduces the power the closer it gets to the return_flow_setpoint. The power reduction can be set via the control deviation parameter.

Remark: Compressor speed should never be below 15%. This was also set for me by the Brötje technician.

Here is the heat output of the 8er. At factory setting approx. 7kW /AT5 degrees, as you can also see on your unit. There is still some room to go down....