Brötje BWL Neo 8 - Problems with the setting

How do you come to the conclusion that it always runs at 7kW? And what do you mean by that? Is the heating element active?

How do you come to the conclusion that it always runs at 7kW? And what do you mean by that? Is the heating element active?

I see that in the settings. Currently 6.7kW with a COP of 4.9 = approx. 1400W electrically. It never runs below 6.5 kW. The heating element has never been active.

The performance charts unfortunately only start at W35. But apparently, it cannot absorb less than 1400W. One can only be glad that the COP is at least that high.

It's definitely the wrong device for your house. Such things are installed in unsanitized old buildings.

Therefore, there won't be much to do against the cycling. The consumption is really high at 30kWh, though. Are the windows kept open permanently?

Well, you can still reduce the cycling by finding the thermal short circuit.

And set the hysteresis high to 2 when heating and to 5-6 degrees for hot water.

it already modulates as it should. The display "WMZ_Leistung" is confusing. It decreases with falling outside temperatures, so it is not the performance of the heat pump! Don't worry about the cycling. Even if it cycles 15 times a day throughout the year (which it doesn't, because in summer it only produces domestic hot water), this thing lasts 25 years at 150,000 compressor starts! The hysteresis is also different from other brands, so you have to look at it differently as well. I'd be happy to help you again in 2 weeks, as I myself will be on vacation ;-)

here are my data in heating mode at 4°C outside temperature.

heating circuit pump at 66%


compressor at 22% power



these are the factory settings of the compressor via the heating curve