ᐅ Air-to-water heat pump supply temperatures

lesmue79 schrieb:


If I let the heating run continuously, I get about 15–20 cycles per day.

You should definitely address that as a priority.

If the system is cycling, you won’t get rid of the heat.
Is the error code active?
How much power does the heat pump have?
If it only runs for 8 hours, it then needs 16 hours to cool down and catch up. You shouldn’t be surprised about the supply temperature in that case.

T_im_Norden schrieb:

If it cycles, the heat won’t be properly released.
Is ERR active?
How much power does the heat pump have?
If it only runs for 8 hours, it then needs 16 hours to cool down. You shouldn’t be surprised about the supply temperature.

I’m currently experiencing the same "problem." The heat pump runs for 8 hours, then pauses for another 8 hours, and so on. It would be better to get the unit to run continuously. However, my system is somewhat oversized and probably can’t modulate down that far. The question is, could something be adjusted or optimized? That would likely improve efficiency by a few percentage points.

Although I don’t fully understand how it modulates exactly. When it’s running, it operates at full capacity with 8 kW. But it could also run at 5 kW. I haven’t figured out yet under which conditions it runs at which output.

Has the hydraulic balancing been carried out?
Which heat pump and what capacity?

Bookstar schrieb:

I currently have the same "problem." The heat pump runs for 8 hours, then pauses for 8 hours, and so on. It would be better to have the system running continuously. But my unit is somewhat oversized and probably can’t modulate down that far. The question is, could there be a trick to improve this? It would certainly increase efficiency by a few percentage points.

What I don’t understand is exactly how it modulates. When it runs, it runs hard at 8 kW. But it could also operate at 5 kW. I haven’t figured out yet when it draws how much power.

This depends, among other things, on the set hysteresis. At the start, it always runs at full power, and then when it reaches the upper limit of the hysteresis band, it reduces output. But 8 kW is already quite a lot.

I don’t want to hijack the thread. I could probably adjust the hysteresis. But the fundamental problem of the machine being too large cannot be solved.