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

The heating engineer hasn’t exactly done a great job so far (technically speaking – he does seem to be trying), has he?
I claim he simply doesn’t know any better and won’t be able to fix it either.
Wasn’t he the one who caused the whole messed-up installation in the first place? Or was that someone else?

Hmm, the small pulses in the second picture are probably the pump running briefly from time to time to check the return flow. When my pump is not heating, I also see this; the circulating pump runs for a few minutes briefly. In the first picture, I also suspect that the sensor is simply giving faulty readings right at the end of the heating cycle.

In another forum, I was told that I can completely ignore this.

Tolentino schrieb:

But so far, the heating technician hasn’t exactly covered himself in glory, technically speaking—although he does seem to be trying, right?
I’d say he just doesn’t know any better and won’t be able to fix it now.
Wasn’t he the one who caused the whole messed-up installation in the first place? Or was that someone else?

Sorry, I confused Zaba and Alessandro. Please just ignore.

halmi schrieb:

Hmm, the small spikes in the second picture are probably the pump turning on briefly from time to time to check the return flow. When my pump isn’t heating, I see the same thing— the UWP runs for a few minutes briefly. For the first picture, I also suspect the sensor is just giving incorrect readings right at the end of the heating cycle.

I was told in another forum that I can just ignore this completely.

And that’s exactly how it is all the time, with these false readings. With a return-flow-controlled heat pump, this is a big problem because if it measures 25°C (77°F) while the actual temperature is 31°C (88°F), the heat pump will have been running unnecessarily for 5 hours, since it should have stopped when the return temperature reached 27°C (81°F).

But heating seems to be working well, right, or am I missing something?

halmi schrieb:

But heating looks good, doesn’t it, or am I missing something?

The heat pump doesn’t operate smoothly due to fluctuations in the return temperature. A temperature difference of up to 8°C (14°F) in standby and 15°C (27°F) during heating is definitely not good.

The consequence of these high temperature differences is simply that the heat pump cycles on and off far too often with short pauses, causing the temperature to fluctuate more and more. Recently, I had almost 25°C (77°F) in the living room without any sun input due to the short heating cycles at 25/20.5/0. Essentially, that shouldn’t be possible at all.