ᐅ Central room temperature controller for the fan coil unit (FCU) of the underfloor heating system
Created on: 23 Jun 2020 11:34
M
micric3
Hello,
Is there a way to control the ERR centrally on one device, so that, for example, the children cannot adjust the underfloor heating control (heating circuit)? Also, I don’t mind not having a thermostat with a controller in every room. What would be the alternative? Are there sensor-only devices that, for example, send the temperature wirelessly to the central unit, or does a separate fixed setting for the respective heating circuit also count as an ERR?
Good luck
M
Is there a way to control the ERR centrally on one device, so that, for example, the children cannot adjust the underfloor heating control (heating circuit)? Also, I don’t mind not having a thermostat with a controller in every room. What would be the alternative? Are there sensor-only devices that, for example, send the temperature wirelessly to the central unit, or does a separate fixed setting for the respective heating circuit also count as an ERR?
Good luck
M
micric3 schrieb:
whether most builders are satisfied with the standard (mandatory) ERR installation and the associated wall-mounted room controller (in terms of appearance) That is probably the case. Everyone who is unhappy with it simply does not have it installed in the first place. However, in my opinion, the Homematic components wouldn’t win any design awards either.
small update. The bimetal sensor was installed, the electrician’s boxes were plastered over by the painter and can be uncovered if needed. The electrician was asked to include Homematic in the offer but had difficulties. We agreed not to install an ERR control system. Not sure about the legal situation, but if the building inspector overlooks it, probably not a problem. I can manage without the ERR for now and have two fallback options (wireless or standard bimetal sensor).
A
Appel200012 Nov 2021 14:40Hello everyone,
Even though this topic is basically settled here, I didn’t want to open yet another thread about “hydraulic/thermal balancing.” I hope that’s okay.
@T_im_Norden
You explained everything very clearly and understandably for me as a layperson, so maybe you can help again here.
My system:
Daikin Altherma 3R
2 underfloor heating manifolds (ground floor and upper floor) and an ERR (Electronic Radiator Regulator) in each room.
The heating engineer gave me a thick bundle of calculations (heat load and thermal balancing), but I don’t really understand them.
Settings on the heating system:
Flow temperature 25°C (77°F)
Desired room temperature 21.5°C (70.7°F)
Heating curve 0.4
Question 1:
The heating runs and warms up nicely; the fine adjustment is currently done via the ERRs.
If I deactivate these, most rooms will probably get too warm.
Then I would have to reduce the flow rate directly at the manifold, right?
But by doing that, wouldn’t I be messing up the heating engineer’s balancing? Because, I assume, they set it according to their calculations.
Question 2:
What exactly is the difference between thermal and hydraulic balancing?
To me, the definitions always sound the same… opening or closing a valve so that the right amount of water flows through the heating system to achieve the correct temperature. Or is that an oversimplification?
Question 3:
If the ERRs are removed and the valves are set, then temperature control basically happens only through the flow temperature.
So why do I set a room temperature on the heating system? What purpose does that serve? If it's too cold, increase the flow temperature; if too warm, decrease it... or how?
I hope someone can shed some light on this 🙂
Thank you all!
Even though this topic is basically settled here, I didn’t want to open yet another thread about “hydraulic/thermal balancing.” I hope that’s okay.
@T_im_Norden
You explained everything very clearly and understandably for me as a layperson, so maybe you can help again here.
My system:
Daikin Altherma 3R
2 underfloor heating manifolds (ground floor and upper floor) and an ERR (Electronic Radiator Regulator) in each room.
The heating engineer gave me a thick bundle of calculations (heat load and thermal balancing), but I don’t really understand them.
Settings on the heating system:
Flow temperature 25°C (77°F)
Desired room temperature 21.5°C (70.7°F)
Heating curve 0.4
Question 1:
The heating runs and warms up nicely; the fine adjustment is currently done via the ERRs.
If I deactivate these, most rooms will probably get too warm.
Then I would have to reduce the flow rate directly at the manifold, right?
But by doing that, wouldn’t I be messing up the heating engineer’s balancing? Because, I assume, they set it according to their calculations.
Question 2:
What exactly is the difference between thermal and hydraulic balancing?
To me, the definitions always sound the same… opening or closing a valve so that the right amount of water flows through the heating system to achieve the correct temperature. Or is that an oversimplification?
Question 3:
If the ERRs are removed and the valves are set, then temperature control basically happens only through the flow temperature.
So why do I set a room temperature on the heating system? What purpose does that serve? If it's too cold, increase the flow temperature; if too warm, decrease it... or how?
I hope someone can shed some light on this 🙂
Thank you all!
I’m also a beginner on this topic, but I’ll give it a try since I just completed the initial settings.
1.)
The hydraulic balancing done by the plumber was rather rough and approximate.
The calculation of the surface heating had – at least in our case – little to do with the heating system and its design itself.
The cycling and runtime were really bad, and this was not due to the lack of the ERR (energy regulator).
Make sure to note down your settings so that you can revert to the original configuration if needed and gradually familiarize yourself with the system.
2.)
That’s also how I understood it, but I’m happy to learn more.
3.)
Our Vaillant system calculates the desired flow temperature based on the desired room temperature and the outdoor temperature.
Since the Vaillant uses degree minutes, this directly affects the cycling and runtime.
Here, you have to adjust, check, and measure until you find the values that work best for you.
1.)
The hydraulic balancing done by the plumber was rather rough and approximate.
The calculation of the surface heating had – at least in our case – little to do with the heating system and its design itself.
The cycling and runtime were really bad, and this was not due to the lack of the ERR (energy regulator).
Make sure to note down your settings so that you can revert to the original configuration if needed and gradually familiarize yourself with the system.
2.)
That’s also how I understood it, but I’m happy to learn more.
3.)
Our Vaillant system calculates the desired flow temperature based on the desired room temperature and the outdoor temperature.
Since the Vaillant uses degree minutes, this directly affects the cycling and runtime.
Here, you have to adjust, check, and measure until you find the values that work best for you.
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