10
7. Insulate all pipes inside the room and wall bushing to avoid condensation.
4.2.1.3 Installation sketch
1
2
3
4
5
6
1. Geothermal heat exchanger
2. Ventilation unit
3. Condensation drainage connection
4. Air release valve
5. Balance valve
6. Geothermal heat collector
4.2.2
To fill the geothermal heat collector circuit
Warning
• Only an authorized installer/plumber is allowed to fill the geothermal heat collector circuit.
• Higher concentrations of ethylene glycol can lead to flow problems due to the viscosity of the mixture.
Concentration of more than 50% ethylene glycol will damage the system irreparably.
Note:
Fill the system with a ready-to-use ethylene glycol-water mixture. Please note the correct percentage of
the ethylene glycol!
Table 3 Required percentage of ethylene glycol in the mixture
Maximum outside
temperature [ºC]
Ethylene glycol
percentage [%]
-15
35
-20
40
-25
45
-30
50
Fill the system as follows:
1. Remove the front door.
2. Connect a filling hose with the external filling pump to the filling valve X1.
3. Connect a drain hose to the filling valve X2.
4. Put the open end of the drain hose into a bucket.
5. Open the filling valves X1 and X2.
6. Close the stopcock X0. The valve X0 is closed when the handgrip is perpendicular to the pipe.
7. Open vent X6.
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