Properly setting the air-to-water heat pump with underfloor heating

Just discovered... Is that normal?

How is the drainage for the heat pump planned?

If no defrost water accumulates in the device and the path out of the heat pump itself remains clear, it’s not initially dramatic. But usually not the case, the water should also be moved away from the house.

Is the drain simply not yet connected to the drainage? It looks like a KG pipe just needs to be connected in the front, but you can’t see it in the picture. If that’s the case, I would first make the hole where the small ice lake is now bigger, so it can drain over a larger area and the water doesn’t freeze all the way up to the heat pump.

The outdoor unit usually has a condensate drain. Currently, it just goes onto the displaced ground, but that will surely be changed. Either connected to the drainage system or diverted into a gravel bed for infiltration. The amount is also unproblematic now, just that little puddle. It rains more here in 2 minutes. No panic.

The heat pump itself should defrost to be able to work efficiently.

I don't know how the process is planned, for me it's mainly about all the ice on the device itself!

A heat pump is basically a reversed refrigerator; during defrosting the condensate water has to go somewhere. I think it is normal; with a neighbor who has an outdoor unit it always looks like that.

On the device itself I actually never have ice, only on the exchanger, but depending on the weather conditions that is probably normal, it just defrosts again eventually.