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FOR THE INSTALLER
Filling water in the heating system
The heating system normally has an expansion vessel with a pressure
gauge.
This is what to do:
1. Open and close the tap between the cold water system and the heating
system in short time intervals.
2. Read the pressure on the pressure gauge.
3. Vent the system and refi ll to the correct pressure.
Note
The fi rst litres from the return pipe
are often contaminated. Therefore
collect the fi rst few litres in the
circuits in a separate vessel.
Connecting the heat pump to the heating system
Filling the heat transfer fl uid in the
collector hose
The collector hose is fi lled with heat transfer fl uid to be able to collect heat
from the ground. The fl uid is a mixture of water and anti-freeze. It should
have a freezing point of approximately -15ºC.
Proceed as follows to fi ll the collector hose with heat transfer fl uid:
1. Connect two hoses from the fi lling tank to the fi lling unit, (as illus-
trated below.)
Expansion tank
Filling and venting valve
Filling unit
*HT Plus 6-11kW uses this
version of fi lling unit.
**HT Plus 14-17kW uses this
version of fi lling unit.
Filling pump
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