Source: Article from Hus og Bolig
HEATING: If you are considering replacing the oil boiler with a heat pump, you should make sure that the pipes in the floor are clean and neat.
– Not everyone is aware of it, but the pipes in waterborne plants will over time grow back if you do not implement measures to prevent this from happening, says Lance Chr. Horner in Vaillant Norway. The metals in the various connections in the system will eventually begin to corrode, and in the long run a sludge coating may form which settles in the pipes. In most cases, this will not present serious problems, but many will notice that they constantly have to turn up the effect on the heat source to achieve the same temperature as before.
– More and more people call us and say they are struggling to raise the temperature in their waterborne system. Very often it is due to sludge formation in the pipes. The sludge creates an insulating layer that prevents the heat from escaping. To get the same effect as before, you will have to increase the temperature, explains Rune Pedersen, technical product manager at Vaillant Norway.
Worse with heat pump
Even though it is not very energy-efficient to just turn up the heat, according to Pedersen, it will be possible to live a long time with such a solution. Apart from the fact that the cost of heating will increase, you will probably not notice it anymore. At least as long as the plant is operated by an old oil boiler. If you choose to replace it with a heat pump for environmental or economic reasons, the problem can immediately get worse.
– Replacing the oil burner with a heat pump, for example to operate an existing radiator system, has become very popular. The problem with this is that there is often a lot of corrosion and sludge in the old pipes. As long as this erupts and runs in an oil burner, it is not necessarily a big problem operationally, but if you install a heat pump, you can in a short time risk that the entire system stops, says Pedersen.
All heat pumps have a so-called heat exchanger. It consists of thin, fine slats or ribs. These provide heat to the water that passes through the plant. When sludge and other impurities come in contact with this fine mechanics, the pump will initially have problems emitting the heat it produces, and eventually stop working.