Hello!
I'll start.
Heated area 200m2 (2,153 sq ft)
KfW 55 standard
Mechanical ventilation with heat recovery
Current outdoor temperature 6°C (43°F)
Heating energy consumption including hot water 35 kWh
Electricity consumption 9 kWh
COP 3.88
I'll start.
Heated area 200m2 (2,153 sq ft)
KfW 55 standard
Mechanical ventilation with heat recovery
Current outdoor temperature 6°C (43°F)
Heating energy consumption including hot water 35 kWh
Electricity consumption 9 kWh
COP 3.88
T
T_im_Norden21 Jan 2021 22:00Well, there you have the answer: the sensor is malfunctioning.
A
Alessandro22 Jan 2021 07:43I also suspect a sensor fault.
You wouldn’t believe the partly unexplained issues that can occur with simple sensors 😉
Especially with heat pumps.
With cheap sensors, moisture can form inside the casing, affecting the resistance/value. This often happens during transitional seasons (cold nights, warm days).
Also, the constant slight vibrations from the heat pump can cause the connection between the sensing element and the cable to loosen.
All this has happened before...
This is what you get when you squeeze every penny from the supplier 😉
You wouldn’t believe the partly unexplained issues that can occur with simple sensors 😉
Especially with heat pumps.
With cheap sensors, moisture can form inside the casing, affecting the resistance/value. This often happens during transitional seasons (cold nights, warm days).
Also, the constant slight vibrations from the heat pump can cause the connection between the sensing element and the cable to loosen.
All this has happened before...
This is what you get when you squeeze every penny from the supplier 😉
Alessandro schrieb:
I also suspect a sensor fault.
You wouldn’t believe the (sometimes) inexplicable issues that can occur with simple sensors 😉
Especially with a heat pump.
With cheap sensors, moisture can form inside the casing, which affects the resistance/value. This often happens during transitional seasons (cold at night, warm during the day).
Also, constant slight vibrations from the heat pump can cause the connection between the sensing element and the cable to loosen.
Has all happened before...
That’s what you get when you try to squeeze every penny from the supplier 😉 I really hope that’s the cause. The sensor had a few moments where it measured accurately with very little deviation during standby, and at those times the heat pump was performing perfectly.
A
Alessandro22 Jan 2021 08:31We had this problem once with Heliotherm. After a while, the same sensor drifted in almost every system. When they sent the sensors back to us for inspection, we couldn’t find any fault. This went back and forth for weeks until it was determined that under unfavorable temperature fluctuations over a certain period, a small amount of condensation forms inside the sleeve. But that was certainly about 10 years ago...
Alessandro schrieb:
That’s what you get when you squeeze every cent out of the supplier 😉 It’s all a cost-benefit calculation or misaligned incentives in purchasing, where a strong company structure should keep overconfident buyers in check. I only get annoyed when it’s: “We have to use that pharmacy supplier; we tried it 10 years ago and it didn’t work.” 😀
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