Underfloor heating air-water heat pump. House too warm when the sun shines

Then turn the top to regulate the flow (be careful at first so nothing breaks, but your tubes resemble mine, so they should work similarly. If it doesn’t turn, please wait for the heating engineer)

I am now at the regulators, have loosened the lower nut, and now want to turn the top. I don’t want to use too much force anymore, but when I press lightly it doesn’t move, the top black wheel. Which direction do I have to turn to reduce the volume? Counterclockwise? We have the heat again this morning, unbearable in the bedroom

so this is really not rocket science? Less flow --> turn clockwise, you can see what happens on the top meter when you turn it?

Exactly like that And immediately check if the main bathroom can get more flow

The refrigerant of the heat pump also has an optimal operating range, and for this the spread between supply and return is also important. Which spread is optimal also depends on the refrigerant, but I am not familiar with that...

O.k., I have figured it out, I have now adjusted the controls back and forth a bit. For example, I have taken energy from the corridors, also from the master bedroom. I wanted to give this energy to the bathroom, but I couldn’t set more than two, water sprayed out, and I quickly turned it back down. I would actually like 2.5 or three in the bathroom, but now I have only two. Well, I’ll keep an eye on it. I hope I haven’t reduced the volume flow too much overall. Because I have taken quite a bit from the corridors; here it is 23.2°.

Exactly.
And immediately check whether the main bathroom can get more flow.

This is how it looks now, see attached.
On the ground floor, I wanted to give more energy in the living room and also took some from the hallway. But the tubes, three in total for living, couldn't really be rotated well. And one is black. I didn't dare to touch that :-/

I might have taken a little more flow away from the dressing room. Tonight you have a first trend. You can read the overall flow on all the tubes. After 24h the house has settled again, then please give feedback with the table.