Air-water heat pump current consumption and data

Err are off?
You started with completely open HKV?
Which room do you want to use as reference?
Bathroom upstairs?
You’d better start a separate thread to check that.

Yes. ERR have been fully on for 3 weeks. Basement is closed. Heat distribution valve completely closed. I will set the 3 closed heating circuits in the basement to 0.5 if we can’t get the spread under control. It will have to be the upstairs bathroom, since the flow rate there is already at 3.

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Yes. ERR have been fully open at full throttle for 3 weeks. KG is closed. ÜSV completely closed. I set the 3 closed HK in the KG to 0.5 if we don't get the spread under control. It will have to be the OG bathroom, as the flow there is already at 3.

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In my OG bathroom, full throttle open, still only a flow of 1 l/m. If I could get 3 l/min here, I could probably lower my heating curve and also save energy.

But I just can't find the reason why the flows in the OG are so low. The heating pump is automatically controlled because it is modulating.

I observed the phenomenon today when I turned up the other radiators [HK] on the upper floor [OG]. In the process, the upper floor bathroom [OG Bad] dropped by itself from 3 to 2.75, so I had to readjust the Taco on the upper floor bathroom to get back to 3.

The resistance in the upper floor is higher, water finds the easier path. Less resistance, more flow.

The resistance on the upper floor is higher, water takes the easier path. Less resistance means more flow.

Yes, okay. Then I would have to turn down the valve downstairs on the ground floor, right? But then I will have problems with defrosting because the minimum flow will also go down.

Upstairs for me, the bathroom is fully open, yet only a flow rate of 1 l/min. If I could get 3 l/min here, I could probably lower my heating curve and also save energy. But I just can't find the reason why the flow rates upstairs are so low. The heating pump is automatically controlled because it is modulating.

Some thermostatic radiator valves also have a flow restriction in the return line; take a photo of it.