ᐅ IDM iPump 2-8 Optimization / Adjustment

Hello, we moved into our newly built house about six months ago, which was constructed as a KfW 50 house with a living area of approximately 145 sqm (1,560 sq ft) over two floors plus an attic (no basement). An IDM Aero/iPump 2-8 heat pump is installed, and there is underfloor heating everywhere.

Unfortunately, I don’t have details about the design of the underfloor heating, so I don’t know the pipe spacing or the target temperature used for sizing the heating system.

Our current problem is that not all rooms are warming up equally.

The setpoint temperature for the heating circuit is currently 23°C (73°F), with an eco mode temperature of 16°C (61°F). The heating curve is set at 0.44 (I increased it today to test the impact; it was previously set at 0.40). The parallel shift is set to 0°. The heating activation time is set to 15 minutes. All thermostats in the rooms to be heated are set between 3 and 6, but we still do not reach the target temperature. In the children’s room, the thermostat is currently set to 6, but the thermometer in the room showed a temperature of 16.1°C (61°F) during the day. How can this be?

I’m running out of ideas about what could be causing the rooms not to warm properly.

Also, the energy consumption seems much too high in my opinion. Our total electricity consumption since 1.7. has been around 3600 kWh. :o

Does anyone have any ideas or advice?

Why don’t you have the documents for your newly built house? Can you obtain them?

16°C (61°F)? Was the window open the whole time?

Could the heating circuits be mixed up?

Otherwise, you should look into the topic of hydraulic balancing.

RotorMotor schrieb:

Why don’t you have the documents for your newly built house?
Can you get them?

16 degrees Celsius (61°F)? Was the window open the whole time?

Could the heating circuits be mixed up?

Otherwise, you should look into the topic of hydraulic balancing.

It’s not our house, just rented 😉

No, with the current outdoor temperatures, the indoor temperature would probably be even lower then.
Nothing should be mixed up; the valves in the manifold open and close as they should. According to the sight glass, the flow rate is 2 liters/min (0.53 gallons/min), which is the maximum when the thermostat is set to 6.

I also suspect that no hydraulic or thermal balancing was done. But of course, it’s also possible that something needs to be adjusted on the heat pump itself.
With the heating curve, everywhere should actually warm up, right? Isn’t 0.44 actually too high for a new building?

If it is rented, you could have the landlord come and take care of it.
16 degrees Celsius (61°F) is really quite cold.

The distribution box might also be mislabeled.
I would almost assume so. With a flow rate of 2 liters per minute (0.53 gallons per minute), it is not understandable why the temperature is no warmer than 16 degrees Celsius (61°F).
What flow rates do the rooms that get warm show?
What else differentiates those rooms from the children's room?

RotorMotor schrieb:

If it’s a rental, you could have the landlord take a look.
16 degrees Celsius (61°F) is really quite cold.

The distribution manifold could also be mislabeled.
I would almost assume that. With a flow rate of 2 liters per minute (0.53 gallons per minute), it’s hard to understand how the temperature could be no warmer than 16 degrees Celsius (61°F).
What flow rates do the rooms that are heating up show?
What else distinguishes those rooms from the children’s room?

At first, I also suspected mislabeling, but since the flow rate in the sight glass changes as soon as I adjust the thermostat to a different setting...
In the living room, for example, the thermostat is set to 4 and the sight glass also shows 2 liters per minute (0.53 gallons per minute).
Other than size, the rooms here do not really differ.

Do you think there might be any setting directly on the heat pump that I could change initially so that it is optimally configured from the heat pump’s side? Based on that, I could then observe how it affects the individual rooms.

I would still not rule out the possibility that something is mixed up. So it could still be that the pipes lead to a different room and warm that one instead. Please post a photo.

As long as the temperature difference between the rooms is the only issue, but it generally gets warm, I would first adjust the heating circuits rather than the heat pump.