Hydraulic balancing air-water heat pump + efficiency circulation pump

I would have 21°C-22°C everywhere, so as the next step, if the heating curve remains the same, I would slightly reduce the temperature in the guest WC and utility room.

18°C would be enough for the guest WC and even 15°C for the utility room. If that works, I would move on to the hallway with just under 21-22°C to bring it closer to 20°C.

The living room with 21°C-22°C can stay as it is for now.

The guest room and bedrooms are at 20.5°C-21°C; 18°C would also be sufficient there, but I'm still debating whether to keep it at 20°C (because of the bathroom in between) and possibly use ERR there. That way, I would have at least 20°C in the guest room and bedrooms and could lower it occasionally with ERR if I wanted. This is before heating the two rooms via the bathroom if I reduce them too much. But that is still future music.

So this morning it was -5°C outside according to the regulation and you notice in some rooms that it feels slightly cooler, for example 20.5°C instead of 21.3°C or so.... But it is still not too cold for that reason.

I will wait until this evening or tomorrow morning to see how it develops further, hoping that the -5°C will hold or that the outside temperatures will go down even more.

But if everything stays like this, for me the heating curve sounds like I don’t really need to reduce much, if at all?

You can then, if it is still too warm in the reference room, lower the desired temperature. Otherwise, I would balance the rooms that are too warm for you one after the other. Wait again for a while and always only adjust one room and make small changes. I notice that you already have a feel for the heating and its effects.

Yes, a feeling of how the system ticks is slowly developing.

Yesterday my theory with the volume flow regulating pump was almost confirmed.

I started throttling the guest WC and utility room so that both circuits are almost closed or have minimal flow. This reduced the total volume flow of the system by about 20 l/h.

Actually, I want the liters that I throttle somewhere to flow into another heating circuit that, for example, still has too little volume flow. (A classic example would be the bathroom.) But since this does not happen, throttling more makes no sense because I gain nothing except further reducing the total volume flow.

If I keep the heating curve as is, I have to throttle fewer rooms and reduce the total volume flow less.

If I increase the heating curve again, I consequently have to throttle more rooms, but I gain nothing except that the system ends up running at a higher heating curve with less volume flow.

That is why I want to do the test with a functioning ERR and actuators.

You can definitely increase the volume flow in the heat pump of your system if necessary; ask the HB or the manufacturer how to regulate that.

I would leave the Err as it only closes the circuit for you.

Throttling to reduce the temperature in the rooms will help you since the heat pump has to heat less.

What is the flow rate of your pump set at?