ᐅ Air-to-Water Heat Pump: Current Consumption and Data

Created on: 29 Sep 2020 11:06
B
Bookstar
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
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Daniel-Sp
10 Jan 2021 14:56
Whether to use thermal disinfection or not is a matter of personal preference. Currently, it is probably enabled. You can set it in the hot water menu under maintenance programs. However, if you activate it, you must also flush the pipes individually; otherwise, it is pointless.
B
Bookstar
10 Jan 2021 15:28
I would definitely turn those off; they don't make sense in an occupied single-family house.
Z
Zaba12
10 Jan 2021 16:04
Bookstar schrieb:

I would definitely turn that off; it doesn’t make sense in an occupied single-family house.
Ok, I will do that.
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Zaba12
11 Jan 2021 16:34
The differential in standby mode is widening again. The 3 highlighted lines in the screenshot represent the last 3 complete heating cycles in the graph. The current heating cycle is ongoing, with the return temperature at 23°C (73°F) and the supply temperature at 32.8°C (91°F).

So, the differential is increasing again and seems to be fluctuating, right?
I reset the pump optimization to "no" and set it to 180 minutes. Maybe my heat pump doesn’t respond well to that setting.

If the differential doesn’t improve after this, then I have no idea what else it could be, since the flow rate is currently at 1440 liters/hour (380 gallons/hour) and should actually be adequate, right?


Mehrteiliges Diagramm mit Temperaturkurven, Soll-/Ist-Werten und Ereignis-Balken über Zeit.



Tabelle mit Heizungsdaten: Startzeiten, Modus, Laufzeit, Pause, Temperaturen und Energiewerte.
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Daniel-Sp
11 Jan 2021 16:56
Yes, then let's try it without pump optimization first.
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Zaba12
11 Jan 2021 17:15
I basically reset everything to the point when I had a 0.2°C (0.36°F) temperature difference in standby mode. That means,

- Total flow rate back to 1380 liters per hour (l/h)
- Pump efficiency nominal and minimum both back to 10.00 volts (V)
- Pump optimization set to no and 180 minutes.

Let’s see, one thing is clear: if the temperature difference in standby mode is already poor, it will be the same during heating operation.