ᐅ Operation and Adjustment of the Underfloor Heating System

Hello everyone,

I need some help operating my underfloor heating system.

We recently moved into a new house. A conservatory was added afterward, and only this conservatory has underfloor heating (also installed later). The rest of the rooms are heated by conventional radiators.

Unfortunately, I am unsure how to operate the underfloor heating. My questions are:

- Why are there two circuits (A & B in the picture)?
- Do both valves need to be open when the heating is on (valve A and valve B)?
- What is the purpose of valve C? Should it be open?
- When the heating is off (pump unplugged), should all valves be closed?

Thank you very much for the help!

How are "we" supposed to know?

SirTobi schrieb:
If the heating system is not operating (pump plug disconnected)

You should occasionally run the pump even outside the heating season to prevent it from seizing up.

Regarding the valves, I will suggest one possibility, but this is quite uncertain: The circuit with valve A is for the "regular" heating system, while the other one is for the underfloor heating. Valve C is used to regulate the flow rate between A and B. If the conservatory gets too warm compared to the rest of the house, you can slightly close that valve. Whether the valves are closed when the pump is off does not matter; it’s irrelevant.

Thank you for the reply!