ᐅ Underfloor heating with an air-to-water heat pump. House gets too warm when the sun is shining.
Created on: 4 Dec 2019 14:18
C
chewbacca123
Hello everyone,
I have a general question.
We moved into our new build four months ago. The living area on the ground floor has three large floor-to-ceiling windows facing south. We have underfloor heating and an air-to-water heat pump.
It provides a really comfortable temperature inside the house, but we have a problem – whenever the sun is shining in winter, even if it’s -2°C (28°F) outside, the temperature suddenly rises to 24°C (75°F) in the living room. It gets uncomfortably warm in here, and the underfloor heating can’t be turned down quickly.
Should we assume that the large floor-to-ceiling windows are responsible for the heat gain? A photo of the south-facing side of the house is attached.
What would you do – always lower all the blinds as soon as sunlight is forecast? That seems quite annoying...
We have motorized blinds controlled by Somfy. Would you consider buying a sensor that automatically lowers the blinds at a certain temperature?
Thanks in advance for your replies.
I have a general question.
We moved into our new build four months ago. The living area on the ground floor has three large floor-to-ceiling windows facing south. We have underfloor heating and an air-to-water heat pump.
It provides a really comfortable temperature inside the house, but we have a problem – whenever the sun is shining in winter, even if it’s -2°C (28°F) outside, the temperature suddenly rises to 24°C (75°F) in the living room. It gets uncomfortably warm in here, and the underfloor heating can’t be turned down quickly.
Should we assume that the large floor-to-ceiling windows are responsible for the heat gain? A photo of the south-facing side of the house is attached.
What would you do – always lower all the blinds as soon as sunlight is forecast? That seems quite annoying...
We have motorized blinds controlled by Somfy. Would you consider buying a sensor that automatically lowers the blinds at a certain temperature?
Thanks in advance for your replies.
D
Daniel-Sp27 Dec 2019 10:43I have now received data for analysis.
Here you can clearly see the impact of the ERR!
Here you can clearly see the impact of the ERR!
D
Daniel-Sp27 Dec 2019 10:53The heat pump is not yet operating optimally – it switches on and off too frequently –
due to the bypass valve.
Right after the heating cycle starts, the return temperature rises because warm water bypasses the heating circuit and flows directly into the return line. This causes the shut-off criterion to be reached too early, even though the screed has not yet absorbed the desired amount of heat. Consequently, the return temperature drops quickly after the heating cycle ends, followed by the next heating cycle. For clarity, only the return temperature and compressor are shown.
Right after the heating cycle starts, the return temperature rises because warm water bypasses the heating circuit and flows directly into the return line. This causes the shut-off criterion to be reached too early, even though the screed has not yet absorbed the desired amount of heat. Consequently, the return temperature drops quickly after the heating cycle ends, followed by the next heating cycle. For clarity, only the return temperature and compressor are shown.
D
Daniel-Sp27 Dec 2019 10:55When the overflow valve is closed, the return temperature increases only after a delay and at a slower rate, as shown in the following example. The return temperature starts to rise only after more than 10 minutes! The heat is fully delivered to the screed.
chewbacca12327 Dec 2019 12:27Daniel-Sp schrieb:
I have now received data for analysis.
You can clearly see the effect of the ERR here!
[ATTACH alt="ERR2.jpg"]41257[/ATTACH]Fortunately, there is a noticeable improvement. Let’s see what the building inspection will bring.
chewbacca12327 Dec 2019 13:56boxandroof schrieb:
Already closed? I have now turned it from four to five, gradually adjusting it step by step.D
Daniel-Sp27 Dec 2019 15:03Then please send a new DTA and let’s see if anything changes.
Similar topics