20
Filling the heating system
1. Open and close the fi lling loop between the cold water system and the
heating system in short time intervals whilst observing the pressure
guage.
2. Vent the system and refi ll to the correct pressure.
Filling the collector circuit
The collector circuit is fi lled with heat transfer fl uid to be able to collect
energy from the ground. A heat transfer fl uid consisting of bioethanol or
glycol and water is recommended. The freezing point should be approxi-
mately -15°C.
Fill the collector circuit
1. Connect the two hoses from the fi lling pump to the fi lling link as shown
in Diagram 1.
Diagram 1: Filling equipment
Expansion vessel
Filling link
Filling
pump
Refi lling / de-airing valve
Note
Care should be taken when fi lling the
system, not to get any water on the
electrical components. Keep the side
panels on the heat pump when fi lling
the system.
Heat pump
Collector circuit
Connecting the heat pump to the heating system
