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

By compiling all the data, I think I have identified the problem. The minimum flow rate of the heat pump is 1200 l/h (32 gallons per hour), which I was aware of.

Even though the heat pump performed well over the last 7 days, this value was clearly undershot at 1041 l/h (28 gallons per hour). See the screenshot.

I have now adjusted it accordingly. See
1. Excel screenshot.
2. Screenshot from 30 minutes ago.
3. Screenshot taken just after adjusting the new flow rates.

The offset temperature difference is now gone. I will take care of the temperature in the individual rooms and the radiators, hopefully once the heat pump is running properly from now on.

Fingers crossed. Let’s see how it performs during the next heating cycle. I’ll keep you posted and sorry for nagging @Bookstar

The minimum flow rate is required to remove the heat from the heat pump. If the flow rate is too low, the heat will "build up," causing the supply temperature to rise until you get an error message with a protective shutdown. I had suspected this quietly and asked about the total flow rate.

What exactly did you change before the problem occurred? It was running well and efficiently throughout the week.

OWLer schrieb:

What exactly did you change before the problem occurred? It was running well and efficiently during the week.

Actually, nothing except that as I mentioned, on 01.01 I turned off the basement. After that, everything ran smoothly with low consumption and comfortable indoor temperatures, apart from the relatively high differential temperature (which has always been somewhat high) that seemed to have increased until yesterday. So, everything worked properly up to page 13. 😎

Interim update: Looks good. 2 hours and 41 minutes of rest, return temperature decreasing slowly and steadily. Delta T 0.2°C (0.4°F), return temperature 27.8°C (82°F).

I will upload a CSV and DTA file later.

Hello everyone,
I have read through everything and I am a bit confused...
We have a Novelan LAD9 system with a photovoltaic installation and only one meter.

There aren’t many devices running.
- Mechanical ventilation with heat recovery
- Bus system
- Common appliances like a refrigerator, etc.

I noted down the value from yesterday and checked the meter today.
I came up with a total electricity consumption of about 30 kWh per day.
I wonder if our device might be set up incorrectly...?

We have the same menu on the device as @Zaba12