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

There are two possibilities: either the sensors of the heat pump are malfunctioning, or you are losing a significant amount of heat on the way from the heat pump to the heating distribution manifold (HDM).

Is the heat pump installed in a heated room, and are all the pipes to the distribution manifolds insulated?

T_im_Norden schrieb:

Is the heat pump installed in a heated room and are all pipes to the manifolds insulated?

The heat pump is located in an unheated technical basement, but all pipes leading to the heating distribution manifolds are insulated. The only pipes not insulated are the copper pipes inside the heat pump itself, which I plan to insulate as well as possible. The supply line doesn’t lose any heat, while the return line is supposed to lose between 2 to 8 degrees Celsius (36 to 46 degrees Fahrenheit)? How is that supposed to work? Especially with this temperature difference.

Whether heat is lost and how cannot be assessed from the outside.

However, the measurements at the heating circuit valve (HKV) confirm that the problem occurs in the area between the heat pump and the HKV.

Personally, I would still try measuring the supply and return flow at the heat pump and compare the results with the specifications provided by the heat pump.

This way, it would be possible to narrow down whether the issue is caused by faulty sensors or actual heat loss.

Zaba12 schrieb:

On the heat pump, in the menu: supply 24.9, return 23.0
IR thermometer on the sensor sleeve of the heat pump: supply 24.7, return 24.6

I have already taken measurements directly on the heat pump.

These fluctuations in the return temperature curve are not normal. The difference in return temperature between the sensor reading and the IR measurement also requires clarification. Is it similar during the heating cycle? If so, I would recommend checking the sensor.