Filling the climate system
If the pressure is too low, increase as follows:
1.
Connect enclosed flexible hose between connection (QM11) and connec-
tion (QM12). Open filling valves. The boiler section and the rest of the
climate system are filled with water.
2.
After a while the pressure rises on the pressure gauge. When it is approx.
1.0 bar close the filler valve.
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Venting the climate system
In event of repeated filling of the climate system or if bubbling sounds are
heard from the heat pump the system may need venting. This is carried out
as follows:
1.
Turn off the power supply to the heat pump.
2.
Vent the heat pump via the vent valve and the rest of the climate system
via the relevant vent valves.
3.
Vent the supply air battery via its vent valve.
4.
Keep topping up and venting until all air has been removed and the
pressure is correct.
NOTE
The vent pipe from the container must be drained of water before air can
be released. This means that the system is not necessarily bled despite the
flow of water when the bleed valve is opened.
23NIBE™ F470Chapter 2 | The heat pump – the heart of the house
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General