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ᐅ Thermal Balancing of Underfloor Heating – How to Proceed?

Created on: 14 Oct 2020 12:03
T
Tx-25
Original post
Hello everyone.
A quick overview of the system.
Air-to-water heat pump Elco with underfloor heating, 9.93 kWh (kilowatt-hours) photovoltaic system, and central ventilation with heat recovery.

I have now removed the electric actuators for the hydraulic balancing and plan to run the system this way over the winter. I want to make the balancing adjustments using the "float valves." In which direction should they be turned to increase or decrease flow? Is there anything I should be aware of?
Currently, the settings are as they were for the hydraulic balancing.
The heating curve is set to 2 out of 10, and the reference outdoor temperature is set to 12°C (54°F).
So at the moment, heating only runs at night.

The delay time is set to 5 minutes. After this time window, the heating switches off if the temperature is above 12°C (54°F) and switches on if below 12°C (54°F). Would you recommend changing this value?
T
Tx-2514 Oct 2020 21:37
#13
Attached are the pictures of the manifold.
If I open the Tacos valves fully, the hydraulic balancing is completely overridden. Wouldn't it be more sensible to regulate based on the measured values?

Manometer block with glass tubes and red liquid mounted on a numbered metal strip.


Distribution system with six grey pipes, red shut-off valves, and two stainless steel manifolds.


Heating manifold with pipes, red handles, and blue caps, labels visible.
Mycraft14 Oct 2020 21:39
#14
No, definitely not—using that will completely ruin the entire hydraulic system.
A
Andre7714 Oct 2020 22:01
#15
Just a quick question: does it matter whether the tubes are at the top or bottom in the heating circuit valve (HKV)?
Mycraft15 Oct 2020 07:14
#16
No, that is irrelevant. It is also possible without it.
J
Joedreck15 Oct 2020 07:43
#17
As mentioned: record everything meticulously so you can take a few steps back if needed. However, it will obviously be quite challenging to get everything under control. If I interpret the numbers correctly, they indicate the pipe lengths. Balancing this will probably be a real feat.
Mycraft15 Oct 2020 07:49
#18
That’s exactly why I’m saying this. Under no circumstances should you make drastic changes. The system is now most likely more or less balanced. Therefore, if any adjustments are needed, they should be minimal at most.