Underfloor heating, room thermostats and cold tiles

Good evening,

- Outdoor temperature-controlled system flow temperature (heating curve, primary)
- Room temperature with underfloor heating (ERR), with HK ThV
- System return temperature control (performance modulation of the heat generator, mass flow adjustment of the heating circuit pump)

I would translate it like this:

Flow temperature => Flow temperature
ERR => Individual room control
HK => Radiator
ThV => Thermostatic valves
Return temperature => HVAC system

No guarantee but with
Rhenish regards

It's probably the thermostats, in the bathroom I still have 22° (even though I set it to 30° the evening before yesterday), it can't take that long even with underfloor heating. In the office (test in the other direction), I tilted the window and set the heating to 15°. Still 21/22°.

Outside temperatures yesterday were 17° during the day and 8° at night (11:00 PM).

Even if you set your thermostats to 30 degrees, that does not mean the heating system will comply! The thermostat simply stops turning off. What does your flow temperature show? At current temperatures, it is hardly above 25 degrees, and logically, you can never reach more than the flow temperature in the rooms. (For understanding: In winter, for example at 35 degrees flow temperature, you also do not have 35 degrees in the room!)

OK, that is understandable. And how is it in the office? If I want lower temperatures. 15° is already a bit extreme, it should only be for testing, but if I have had the window tilted for almost two days (it's a tilt/slide door, so not a small window) and the heating still makes it 20°, that is not comprehensible. For me, that means it heats even though it shouldn't.

I don't quite understand your question?! You want to have 15 degrees in the office? You have the heating off, window open, and it stays at 20 degrees?

Basically, you can't really have cold rooms in an energy saving ordinance house, unless the heating is turned off everywhere. But with open windows, it should cool down.

Just as a side note. One of our Elis swapped the actuators by mistake during a defect. Because of that, one room was always heating, the other stayed cold. Maybe you have a similar mix-up?

Set everything to zero or minimum. Set one room after the other to maximum. See which actuator moves up and check if it belongs to the correct heating circuit.