109
3. Open the outdoor unit 3-way flow and return ball
valve as shown in Fig. 75: Open in all directions
Allow the heating water to flow in via the fill hose.
Required flow rate for filling with heating water:
■
Min. 600 l/h
■
Max. 1500 l/h
Filling pressure: 0.3 to 0.5 bar (30 to 50 kPa)
higher than diaphragm expansion vessel pre-
charge pressure
Factory-set pre-charge pressure of expansion ves-
sel: 0.75 bar (0.075 MPa) to 0.95 bar (0.095 MPa)
4. Start the filling process in the commissioning assis-
tant.
The filling of the 1st consumer circuit begins.
5. Once air bubbles stop coming out of the drain
hose, use to start filling the next consumer cir-
cuit.
6. After filling all consumer circuits, use to end the
filling process.
The commissioning assistant switches to building
up the system pressure.
7. Close both the 3-way ball valves.
8. Remove the fill and drain hoses.
9. Clean the heating water filter in the outdoor unit
return: See chapter "Cleaning the filter in the ball
valve".
Calling up the filling function
To activate this function, start the commissioning assis-
tant.
See page 99.
Commissioning, inspection, maintenance
Filling the system (cont.)
6222080
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