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

Bookstar schrieb:

At 1 PM, the heating was actually off, with the return temperature at 28.5°C (83°F). Five hours later (despite the sun), the return temperature had dropped to 25.5°C (78°F) and the heating switched back on. So tomorrow the consumption will probably be slightly less than 45 kWh, we'll see.

Otherwise, next week it will be 15 degrees warmer, so the consumption should look considerably better.

Here we have at least a small but significant difference and part of the solution. Your heating system restarts at a return temperature of 25.5°C (78°F). Mine did so yesterday below 23.5°C (74°F). This really shows the effect of a lower heating curve, allowing solar gains to influence the runtime even more than they already do through heating the space. If we had the same heating curve, my heat pump would also start earlier, because solar energy obviously cannot heat the room and screed enough to keep the return temperature above 25.5°C (78°F) consistently. However, 23.5°C (74°F) can be maintained for longer. That’s my theory.

My heat pump switches off when the outdoor temperature averages 12°C (54°F) over 24 hours. Let’s see if that’s a smart strategy. 😎

I think 12°C (54°F) is quite early ;-)
I'm curious too.

Here, temperatures are slowly rising above freezing again. I have adjusted the flow temperature of my heat pump from a maximum of 35°C (95°F) to a maximum of 30°C (86°F). Let’s see if the indoor temperatures are still maintained and how this affects electricity consumption.

Alessandro schrieb:

I think 12°C (54°F) is a bit early ;-)
I'm curious as well.

I just don’t know. Last year, I simply turned off the ERR and the heat pump kept running. This year, the heat pump has to turn off on its own. Whether 12 degrees is okay will depend a lot on the sunlight.

That's correct.
But why don't you raise the curve further, for example to 15°C (59°F)?
The heat pump will then run occasionally to check if the return temperature is below the target return temperature. It doesn't cost anything...
Otherwise, the heat pump completely switches off at 12°C (54°F).
My switch-on temperature is set at 18°C (64°F).

Malz1902 schrieb:

Here, temperatures are slowly rising above zero again. I reduced the maximum flow temperature of my heat pump from 35°C (95°F) to 30°C (86°F). Let’s see if the indoor temperatures are still maintained and how the electricity consumption behaves.

Just like that? ...and before that, were you feeling it was 5 degrees too warm? I don’t really understand this as a standalone measure.