ᐅ Heating system ignores room thermostat – how to adjust?
Created on: 8 Feb 2022 21:53
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HoisleBauer22
The heating system in the apartment we are renting does not respond to the thermostats in any of the rooms. There is underfloor heating everywhere. All thermostats are set below 20°C (68°F), but the temperature measures around 24°C (75°F).
Unfortunately, we only have access to one control box (see photos). Can anything be adjusted there? I have no idea. The white rotary knobs have a notch on the side facing away from the viewer. They are all set to the same position. I also don’t know if anything can be done at the meter.
Unfortunately, we only have access to one control box (see photos). Can anything be adjusted there? I have no idea. The white rotary knobs have a notch on the side facing away from the viewer. They are all set to the same position. I also don’t know if anything can be done at the meter.
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HoisleBauer225 Mar 2022 00:48Update: Unfortunately, my efforts have not yielded any results so far... Are there any other suggestions?
HoisleBauer22 schrieb:
Update: Unfortunately, my efforts have not helped so far... Are there any other ideas? You haven’t done the homework yet.
You should record all the flow rates (ideally post them here), then reduce the flow rates (also note these values) and provide feedback after 2-3 days.
If the apartment is well oriented and has a lot of window area, solar gains can also warm up the place.
Have you only been living there a few days, or why has it suddenly become too warm?
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HoisleBauer225 Mar 2022 22:40driver55 schrieb:
You haven’t done the homework yet.
You should note all the flow rates (best to post them here), then reduce the flows (also note those values) and give feedback after 2-3 days. Are you a teacher? ;-) Homework is kind of outdated in modern full-day/combined schools – at least from what I hear in Baden-Württemberg 🙂
But I did complete part of the homework: The original values are in my post:
HoisleBauer22 schrieb:
Most of the sight glass devices were set to 2 liters (0.53 gallons), only one was at 3 liters (0.79 gallons) (second from the right) BUT: Now I have noticed something new: There seems to be a piston inside these devices. Should I be reading the value at the piston mark? These devices are partly difficult to read, so I was very likely wrong with my previous readings... The photos were taken with special lighting using an LED flashlight, otherwise I wouldn’t have even spotted the piston...
HoisleBauer22 schrieb:
I have completed part of the homework: the original values are in my post HoisleBauer22 schrieb:
I was almost certainly wrong with my previous information. And we still don’t see any before/after values.
The crucial value is at the float. The sight glasses are completely clogged with the “rusty sludge,” because whenever a heating circuit is fully “shut down” by the ERR, the float moves up to zero.
In addition to the flow rates, you could also record the energy amount daily in kWh or MWh…
There are many other things that could be checked, for example whether the thermostats and controllers (valves) actually function. Set them to 30 degrees Celsius (86°F), then to 15 degrees Celsius (59°F) (OFF). A second person must then listen at or inside the heating circuit valve and locate the corresponding actuator motor to check if the flow changes…
As far as I can tell, the system is only about 10 years old…