7 Commissioning [specialist]
14
99640141x-mub-en - V02
2017/07
7
Commissioning [specialist]
Note!
Slowly open the valves in the pipes and in the module, in order to prevent pressure surges.
Functioning check valve
The primary circuit is equipped with a check valve
in the ball valve (D), in order to avoid unwanted
gravity circulation.
For venting and flushing the installation, the check
valve must be open. For this purpose, turn the ball
valve into the position 45°.
In this position, the check valve is not operating.
For the operation of the installation, all (ball) valves
must be completely open (position 0°).
Position 0°
Position 45°
Position 90°
Check valve is operating,
flow only in flow direction.
Check valve is not operating,
flow in both directions.
Ball valve closed, no flow.
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