7 Commissioning [specialist]
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99640x6xx-mub-de – V08
2016/07
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 ball valves (A) and (N) in the primary circuit
are equipped with a check valve, in order to
avoid unwanted gravity circulation.
For venting and flushing the installation, the check
valves must be open. Turn the ball valves therefore
into the position 45°.
The check valve is not operating.
During operation, all the (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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