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
A
Alessandro22 Jan 2021 14:14From a regulatory perspective, this is, to put it politely, rather less than ideal!
Alessandro schrieb:
Without having to fully open the housing and unscrew what feels like 100 covers,wouldn't it have been better to buy your heat pump without the housing and covers, just as a hobby?That’s currently my smallest problem. :p
What really cost me time and money was troubleshooting, because the heat pump ran unnecessarily for too long. Just think about that. The return flow setpoint is 23.7°C (74.7°F) plus 2K, which is my shutdown limit. The faulty sensor shows 23.9°C (75°F) even though it’s actually 28.7°C (83.7°F).
Really crazy.
That’s why the heating curve with 25/21/0 worked. Once the sensor is repaired, it will probably be more like 26/21/0 or even 27/21/0.
What really cost me time and money was troubleshooting, because the heat pump ran unnecessarily for too long. Just think about that. The return flow setpoint is 23.7°C (74.7°F) plus 2K, which is my shutdown limit. The faulty sensor shows 23.9°C (75°F) even though it’s actually 28.7°C (83.7°F).
Really crazy.
That’s why the heating curve with 25/21/0 worked. Once the sensor is repaired, it will probably be more like 26/21/0 or even 27/21/0.
A
Alessandro22 Jan 2021 14:26tomtom79 schrieb:
Why? In our system, the sensors are also attached directly to the pipes. Because you should always measure in the medium (water). Otherwise, the copper pipe, the copper sleeve where the sensor is inserted, the stainless steel sleeve of the sensor itself, and air cause significant heat transfer losses.
You can see for yourself what happens if the sensor is not properly seated in the sleeve.
The sensing element is located right at the tip of the sensor. The contact area of the sensing element is therefore very, very small. Additionally, you also end up measuring the ambient air temperature...
@zaba: You definitely should apply thermal paste inside the copper sleeve where the sensor is inserted!
Alessandro schrieb:
You can see for yourself what happens when the sensor is not properly inserted into the sleeve.The sensor was always properly inserted. The part is simply defective.
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