Ask a questionQuestion?

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

Created on: 29 Sep 2020 11:06
B
Bookstar
Original post
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
H
halmi10 Feb 2021 13:53
#541
I don’t quite get it either. The running pattern looks flawless, the pauses you’re referring to are defrost cycles...

What puzzles me more is why it stops heating at the end. Do you have any shutdown processes like p0_pause or something similar in the log?
B
Bookstar10 Feb 2021 13:58
#542
halmi schrieb:

I don't quite get it either. The operating pattern looks perfect; the pauses you're referring to are defrost cycles...

What surprises me more is why it stops heating at the end. Do you have any shutdown processes like p0_pause or similar in the log?

Where do you see that it stops? One thing is the defrost cycles, and at the other end, it reached the target return temperature plus hysteresis and then switches off.
H
halmi10 Feb 2021 14:02
#543
Even if your modulating pump is much too large, it should never shut off at around -5°C (23°F). The hysteresis looks like around 2K, right?
B
Bookstar10 Feb 2021 14:10
#544
It is set at 1.5k.
H
halmi10 Feb 2021 14:16
#545
Could you please upload a .csv file here?
A
Alessandro10 Feb 2021 14:31
#546
Zaba12 schrieb:

The breaks are really way too short for such a long runtime.
What causes the return flow to drop so quickly?

It's the same for me. I don’t know why either...
Within one hour, the return flow drops by 3°C (5.4°F).