salmson Nexis-VE 2 Installation Et Mise En Service page 50

English
8. Commissioning
8.1 System priming and venting
CAUTION! Risk of damage to the pump!
Never operate the pump in a dry state.
Ensure that the system primed before starting the
pump.
8.1.1 Venting process – Operation with sufficient
supply pressure (Fig. 3)
- Close the two guard valves (2, 3).
- Unscrew the venting plug (6a).
- Slowly open the guard valve on the suction side (2)
and completely fill the pump.
- Tighten the venting plug after the air has
escaped and pumped liquid begins to flow (6a).
WARNING!
If the pumped fluid is hot and under high pressure,
the fluid escaping at the venting plug may cause
burns or other injuries.
- Open the guard valve on the suction side com-
pletely (2).
- Start the pump and verify that the flow direction
complies with the specification on the pump rat-
ing plate.
CAUTION! An incorrect flow direction will cause a
poor pump performance and may damage the
coupling.
- Open the guard valve on the discharge side (3).
8.1.2 Venting process – Pump in suction mode
(Fig. 2)
- Close the guard valve on the discharge side (3).
Open the guard valve on the suction side (2).
- Remove the filling plug (6b).
- Partially open the venting plug (5b).
- Fill pump and suction pipe with water.
- Ensure that there is no air trapped in the pump
and suction pipe. Fill the system until all air is
removed.
- Close the filling plug with the venting plug (6b).
- Start the pump and verify that the flow direction
complies with the specification on the pump rat-
ing plate.
CAUTION! An incorrect flow direction will cause a
poor pump performance and may damage the
coupling.
- Slightly open the guard valve on the discharge
side (3).
- Unscrew the venting plug from the filling plug to
remove the air (6a).
- Tighten the venting plug when the air has
escaped and pumped liquid begins to flow.
WARNING!
If the pumped fluid is hot and under high pressure,
the liquid escaping at the venting plug may cause
burns or other injuries.
- Fully open the guard valve on the discharge
side (3).
- Close the venting plug (5a).
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8.2 Starting the pump
CAUTION! Risk of damage to the pump!
Never operate the pump at zero flow (closed dis-
charge valve).
WARNING! Risk of injury!
Coupling guards must be in place and secured by all
relevant fasteners when the pump is running.
WARNING! Harmful noise!
High-power pumps may emit a high noise level.
Use appropriate protection when staying close to
the pump for any extended period.
WARNING!
The installation must be laid out in such a way that
there is no risk of injury in case of liquid leakage
(e.g. caused by mechanical seal failure).
SALMSON 12/2013