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

Bookstar schrieb:

Is that the last hour now? That would mean a COP of 4.

Do you actually have frequent malfunctions? Just today, I had two defrost errors again.

No, I’ve never had any malfunctions until now. The only issue I had was in early December when the underfloor heating lost pressure. For some unknown reason, 20 liters (5 gallons) had to be refilled. No idea where it went.

I’ll put it this way: I don’t really know what to make of the numbers after the heat pump acted so strangely in the past few weeks. halmi noticed it too.

15.6 kWh in 2 hours. Now, after 2 hours, it’s off again because the return temperature target + 2°C (4°F) has been reached.

EDIT: Now the domestic hot water has started running with 2.5 kW.

We currently have the same supply water temperature and the same setpoint for the supply, but the return temperature is 28°C (82°F) while the return setpoint is 27°C (81°F). It's quite strange that for the same room temperatures we need to maintain a return setpoint that is 3 degrees higher.

I can only explain this by the low flow rate. Could you please check the flow rate from the efficiency pump? Our system always shows about 800 liters per hour (210 gallons per hour) there.

Have you ever observed your flow rate during defrosting?

Ours usually modulates around 600 liters per hour (l/h). During defrosting, the flow rate increases to about 1100-1200 liters per hour (l/h). The system has been running continuously since December 24th.

There is only that inside

halmi schrieb:

Have you ever checked your flow rate during defrosting?

Ours usually modulates around 600 liters per hour (160 gallons per hour). During defrosting, the flow rate is about 1100–1200 liters per hour (290–320 gallons per hour). The system has been running continuously since December 24th.

Thanks, I will compare the values tomorrow. No, I will check the flow rate during defrosting tomorrow.

@Zaba12 Strange, it looks a bit different for me. But thanks!

Here for comparison during defrosting, it can really only be due to the flow in your case.