•
Check the driver lubrication.
Refer to the driver Installation, Operation, and Maintenance manual.
•
Check that the pump bearings are properly lubricated.
•
If the pump is oil lubrication, check that the oil level is correct prior to starting pump.
•
If the pump is oil mist lubrication, check that the mist is flowing properly prior to starting pump.
•
Check that the coupling is properly lubricated, if required.
•
Check that the pump is full of liquid and that all valves are properly set and operational, with the
discharge valve closed and the suction valve fully open. Purge all air from the top of the casing.
•
Check the direction of the rotation.
Be sure that the driver operates in the direction indicated by the arrow on the pump casing. Serious
damage can result if you operate the pump with the incorrect rotation. Check the rotation each time
you disconnect the motor leads.
5.2 Pump priming
CAUTION:
Do not run the pump dry.
When to prime the pump
You must prime the pump before startup. When it is possible, locate the pump below the fluid level in
order to facilitate priming and to ensure a steady flow of liquid. This condition provides a positive suction
head on the pump. It is also possible to prime the pump by pressurizing the suction vessel.
Methods for pump priming
Pump installation
Priming method
Positive head on the suction
Open the suction valve and loosen the vent plug on top of the cas-
ing. This allows air to be purged from the casing. While you vent the
air from the pump body, always rotate the pump shaft a few times by
hand.
Suction lift
Priming must be done by other methods such as foot valves, ejec-
tors, or by manually filling the casing and suction line.
5.3 Fill the system
DANGER:
All openings (e.g. pipe connections, flanges) must be sealed off with proper fitting and material
prior to filling pump. Failure to plug all openings will result in personal injury.
1.
Locate the vents at the highest point so that trapped gases and air can escape.
However, if the gases are flammable, toxic, or corrosive, then vent them to an appropriate place in
order to prevent harm to personnel or to other parts of the system.
2.
Check the pipe hangers and anchors to make sure that they are properly set to take the additional
weight of the pumped fluid.
3.
Close all of the drains.
4.
Fill the system slowly so that excessive velocities do not cause rotation of the pumping elements.
Rotation of the pumping elements can cause damage to the pump or its driver.
5.
Check the adequacy of the anchors and hangers:
5.2 Pump priming
Model 3409 Installation, Operation, and Maintenance Manual
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