What flow temperatures are you currently running?

Both documents are a big cheek in their vague description of the connections.

Well, if the system is properly planned, you only have to set the room target temperature, maybe occasionally adjust the heating curve by one step (+/-), nothing more is needed. That's the good thing about it. :(

And the valve fully open as well? The actuator is usually located on that. [ATTACH alt="welche-vorlauftemperaturen-fahrt-ihr-aktuell-536863-1.jpg"]66577[/ATTACH]

How can you tell if the valve is fully open?

when you press the plug in, the flow rate in the Tacosetter shoots up

It is currently 4 degrees outside and the flow temperature is at 30 degrees. This results in room temperatures of 22.5 degrees. The house is KFW55.

Now I'm going to get torn apart for this again :D

And is the valve also fully open? The actuator is usually located there.

I just looked into the technical documents of my Zewotherm HKV.

The employee from the plumbing company said that you should regulate at the sight glass. What do they actually learn in their training?

There are definitely both possibilities.