4 Commissioning [specialist]
12
9976x0210x-mub-en – V01
2020/09
4.
Slowly open the return ball valve [1.2]
to vent the pump section.
5.
Close the drain valve [3.2] while the filling
pump is running and increase the system
pressure to about 5 bars. The system
pressure is displayed on the pressure
gauge. Close the fill valve [1.4] and switch
off the pump of the flush and fill station.
Consider the pressure relief valve (6 bars)!
6.
Check the pressure gauge to see whether
the system pressure reduces and eliminate
leaks where necessary.
7.
Reduce the pressure at the drain valve
[3.2] to the operating pressure.
8.
Connect the expansion tank to the solar
circuit and set the operating pressure of
the solar installation by means of the flush
and fill station (for the required operating
pressure, see instructions of the expansion
tank).
9.
Close the fill and drain valves [1.4|3.2].
10.
Turn the check valves (in the return
ball valve [1.2] and in the flow line) into
operating position (0°, see page 10
