7 Commissioning [specialist]
16
99640766x-mub-en – V03
2014/11
7
Commissioning [specialist]
Note!
Slowly open the valves in the pipes and in the module, in order to prevent pressure surges.
Function check valve
The ball valves (A) and (H) in the primary circuit are
equipped with check valves (B) and (G), in order to
avoid unwanted gravity circulation.
For venting and flushing the installation, the check
valves must be open. Turn the opening mechanism of
the check valves into the position 180°. The check
valve is not operating.
For the operation of the installation, all (ball) valves
must be completely open and the check valves must
be closed again (position 0°).
Check valve (normal flow direction in the figure: downwards)
Position 0°
Check valve is operating,
flow only in direction of flow.
Position 180°
Check valve is not operating,
flow in both directions.
