4 Commissioning [specialist]
14
99609x4x5-mub-en – V05
2017/05
4.3
Flushing and filling the solar circuit
The fill and drain valves required to flush and fill are integrated in the transfer station.
Make sure not to wash dirt particles that may be present in the system into the heat exchanger
and the expansion tank. Disconnect the expansion tank from the solar circuit during flushing
and filling, if necessary, and only use flush and fill stations with fine filters.
The solar circuit is flushed in the direction of flow. Make sure that the pump in the solar circuit
cannot be switched on.
Ball valve with integrated flow check valve
(normal flow direction in the figure below: downwards)
0°
45°
90°
Check valve is operating,
flow only in flow direction.
Check valve is not operating,
flow in both directions.
Ball valve closed,
no flow.
