ᐅ Should the hydraulic balancing and individual room control be deactivated?

Created on: 6 Oct 2020 12:15

Hello everyone!
Since the heating season is slowly but surely starting again, I would like to begin adjusting our heating system (Viessmann Vitodens 200W 13 kW).
We built to KFW 55 standard with underfloor heating.

I keep reading about the hydraulic balancing. I would like to check and possibly readjust it!
Our heating technician was very committed… but not much more than that! That’s why I want to check everything myself.

How do I readjust the hydraulic balancing?
I set all room thermostats to full power (room temperature to 30°C (86°F) for example) and then check the “sight glasses” on the manifold to bring all flows to the same level, or am I misunderstanding something?

Since we have a weather-compensated system, does that affect anything?

If the balancing is correctly adjusted, what should I do next?

I would like to deactivate the ERR (electric radiator valves). How do I do that? Can I simply unplug the motors? Would they then be fully open?

If the ERR is deactivated (whatever the procedure), how do I then regulate the room temperature? Only by adjusting the flow or return water temperature of the heating system?

I would like to keep the weather-compensated control (is that possible?). Then I guess I would have to adjust the rest theoretically via the heating curve, right? How does that work?

It would be great if some experts here could offer me a bit of guidance.

Golfi9018 Oct 2020 11:25

#31

You’re right about that too, @Mycraft

Still, I would like to run the heating pump at full capacity... or is it only possible to turn it on or off?

tomtom7918 Oct 2020 11:29

#32

Normally, you can control that, at least on mine it works, lowering it from 10 volts down to 6 or 7 volts. However, you should adjust this depending on the temperature difference between the supply and return flow.

Mycraft18 Oct 2020 11:35

#33

And for what purpose? Just for fun? Under normal operation, it won’t be running at full capacity anyway.

I thought this was about properly adjusting the heating system and not about a quarter-mile race.

tomtom7918 Oct 2020 11:51

#34

Oh, and reducing the compressor speed doesn’t save any energy? And increasing the cycle run time doesn’t either?
If the temperature difference is too high after the cycle, you can safely reduce the compressor speed. Modulating heat pumps don’t work any differently.

Golfi9018 Oct 2020 12:07

#35

I thought this might increase the flow rate.

But if it’s not needed, that’s fine!

I have now removed all the actuators and fully opened the Tacos.

I will observe how the room temperatures behave over the next 1-2 days.

The exact way to adjust this (or the procedure to follow) has already been explained, thank you.

tomtom7918 Oct 2020 12:20

#36

How many liters do you have now, and what is the temperature difference during a heating cycle?

ᐅ Should the hydraulic balancing and individual room control be deactivated?

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