Xylem P2001406B Series e-1510 Centrifugal Pumps - Manual (Page 25)

CAUTION:
Avoid excessive vibration levels. Excessive vibration levels can damage the bearings,
stuffing box or seal chamber, and the mechanical seal, which can result in decreased
performance.
NOTICE:
• Avoid increased radial load. Failure to do so can cause stress on the shaft and
bearings.
• Avoid heat build-up. Failure to do so can cause rotating parts to score or seize.
• Avoid cavitation. Failure to do so can cause damage to the internal surfaces of the
pump.
Operation under freezing conditions
NOTICE:
Do not expose an idle pump to freezing conditions. Drain all liquid that is inside the
pump. Failure to do so can cause liquid to freeze and damage the pump.
Shut down the pump
1. Slowly close the discharge valve.
2. Shut down and lock the driver to prevent accidental rotation.
Make the final alignment of the pump and driver
WARNING:
• Always disconnect and lock out power to the driver before you perform any
installation or maintenance tasks. Failure to disconnect and lock out driver power will
result in serious physical injury.
• Follow shaft alignment procedures in order to prevent catastrophic failure of drive
components or unintended contact of rotating parts. Follow the coupling installation
and operation procedures from the coupling manufacturer.
You must check the final alignment after the pump and driver are at operating
temperature. For initial alignment instructions, see the Installation chapter.
1. Run the unit under actual operating conditions for enough time to bring the pump,
driver, and associated system to operating temperature.
2. Shut down the pump and the driver.
3. Remove the coupling guard.
See Remove the coupling guard in the Maintenance chapter.
4. Check the alignment while the unit is still hot.
See Pump-to-driver alignment in the Installation chapter.
5. Reinstall the coupling guard.
6. Restart the pump and driver.
Note on the packed pump operation
Tighten the gland nuts
Before you start the pump, back off the packing gland nuts or screws until the gland is
loose.
Hand tighten until the gland is snug against the first packing ring. Initially, water might
freely run from the packing. This is normal and should be allowed to continue for a period
Commissioning, Startup, Operation, and Shutdown
Series e-1510 Installation, Operation, and Maintenance Manual 23