The children's room is too warm in the new building.

The heating engineer has once again set up a system following the motto "As long as it gets warm." You are taking the first real step!

It is a Vaillant underfloor heating.

Gas or heat pump?

Gas or heat pump?

It is a gas heating system.

Now that I am dealing with it, I also feel that everything is set incorrectly here. I understand that the maximum supply temperature is set to 35 degrees and would leave it that way. But I have now seen that the minimum temperature is set to 25 degrees. Does that make sense?

I have just seen that at 0.4 and an outside temperature of 5 degrees, the supply temperature should be around 30 degrees. At the moment, it is already at 26 and the heating is still off.

I understand that the maximum flow temperature is set to 35 degrees and would also leave it that way.

Yes, please leave it like that. It is conceivable that the heating-up program only ran up to 35 degrees or slightly above. If now 50 degrees flow into the underfloor heating, it can cause stresses.
(Although so far one can assume that the heating engineer properly brought the system up to temperature during the function heating )

But I have now seen that the minimum temperature is set to 25 degrees. Does that make sense?

No idea. Could be, depending on other settings. I don’t know Vaillant. Maybe someone else with Vaillant and the same controller will chime in. Otherwise, ask in the pink forum.

Doesn’t sound entirely wrong though. You start with 25 degrees flow, energy is released to the room, and it returns at 20 degrees (5K spread). That’s about right to have any warming effect in the room at all. With 20 degrees flow, you won’t further heat a room that is already 20 degrees warm.

I just saw that at 0.4 and an outside temperature of 5 degrees, the flow temperature should be about 30 degrees. At the moment it is already at 26, and the heating is still off.

Yes, it should be just above 30 degrees flow. Is a hysteresis set?

Yes, it should be just over 30 degrees flow temperature. Is a hysteresis set?

If I knew what that was, then I could check it.

So the first night is over with the new heating curve and everything is nicely warm except for the floor. But this is okay. Yesterday I found the calculations for the circuits. However, I now know how to properly set the flow rate. Is only the affected circuit opened or all of them? I noticed that the flow rate varies depending on how many circuits are open.