ᐅ Air-to-Water Heat Pump: Current Consumption and Data

T_im_Norden schrieb:

Where are the ERRs from?
Did you start with fully open heating circuit valves?
Which room do you want to use as a reference?
Upstairs bathroom?
It’s best to start a separate thread for checking this.

Yes. The ERRs have been fully open for 3 weeks. The basement is closed. The flow control valves (ÜSV) are completely closed. The three closed heating circuits in the basement I will set to 0.5 if we can’t get the temperature spread under control. The upstairs bathroom will have to be used since the flow rate there is already at 3.

Thread to follow

Zaba12 schrieb:

Yes. The electric radiators have been running at full capacity for 3 weeks. The basement (KG) is closed. The underfloor heating (ÜSV) is completely off. I will set the three closed radiators in the basement (KG) to 0.5 if we can’t get the temperature differential under control. It will have to be the upstairs bathroom since the flow rate there is already at 3.

Thread to follow

The upstairs bathroom (OG) in my case is fully open, but still, the flow rate is only 1 liter per minute (1 l/min). If I could get it up to 3 liters per minute (3 l/min), I could probably lower my heating curve and save energy as well.

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.

I noticed this phenomenon today when I turned up the other radiators on the upper floor. As a result, the upper floor bathroom temperature dropped on its own from 3 to 2.75, so I had to readjust the Taco valve in the upper floor bathroom to get it back to 3.

The resistance on the upper floor is higher, so water follows the path of least resistance. Less resistance means more flow.

T_im_Norden schrieb:

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

Alright. So I would have to close the valve downstairs on the ground floor, right? But then I would have problems with pipe drainage because the minimum flow rate also decreases.

Bookstar schrieb:

Upstairs bathroom valve fully open, but still only a flow rate of 1 l/min (0.26 gallons per minute). If I could get it up to 3 l/min (0.79 gallons per minute), I could probably lower my heating curve and 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 (TRVs) also have a flow restrictor on the return side. Try taking a photo of it.