Xylem A-C Fire Pump – Vertical Turbine Fire Pump AC8499 - Manual (Page 16)

16
Section 4 - Operation
Pump Startup & Operation
PRE-START PROCEDURE
Consult the applicable manufacturer’s instructions for detailed
information for the prime mover (electric motor, engine or
steam turbine), coupling, driveshaft, gear head or mechanical
seal. When applicable to the pump and prior to startup, check
the following.
1. Confirm that the following procedures described in the
"Installing the Drivers" sections have been performed:
A. Wiring of Driver.
B. Driver must rotate counterclockwise (CCW) when
viewed from above.
C. Check alignment between pump and driver.
D. Impeller adjustment has been made.
E. Mechanical seal lock collar is attached to shaft.
2. Make sure mechanical seal is properly lubricated and all
piping to seal is connected. Also, check that all cooling,
heating and flushing lines are operating and regulated.
3. All connections to driver and starting device match wiring
diagram.
4. Voltage, phase, and frequency on motor nameplate agree
with line current.
5. Rotate shaft manually to ensure impellers are not binding.
6. Verify that driver bearings are properly lubricated and
check oil level in housing.
7. Check that auxiliary seal components are properly vented.
8. Inspect discharge piping connection and pressure gauges
for proper operation.
PRECISION ALIGNMENT
A Precision Alignment Procedure, Section MA027, has been
written that describes our factory precision alignment.
PUMP STARTUP
1. Partially close valve in discharge line.
2. Crack open suction side valves on pressurized systems
slowly. Open suction valves fully.
3. Vent system when the pump surface temperature has
reached an equilibrium.
4. Start pump.
5. When pump is operating at full speed, slowly open dis-
charge valve. If driver overheats or there is excessive
vibration, stop the pump.
NOTE
: If the impellers have not been finally adjusted, due
to extreme liquid temperature, they should be adjusted
prior to startup and after pump surface temperatures
have reached equilibrium.
STUFFING BOX
With the pump in operation, there should be some leakage at
the stuffing box packing. The correct leakage is a rate which
keeps the shaft and stuffing box cool (approximately one drop
per second). Check the temperature of the leakage as well as
the discharge head. If the pump runs hot and the leakage
begins to choke off, stop the pump and allow it to cool down.
A few light taps with a hammer on the gland will
upset the packing sufficiently to resume leakage. After pump
has cooled, restart pump and follow preceding procedure.
Run pump 15 minutes, check leakage, if it exceeds two drops
per second, adjust packing as described in "Packing
Adjustment and Replacement" (page 17).
THRUST POT INSTALLATION
Thrust pots are not standard on most pumps. A separate
supplement will be inserted for pumps with thrust pots.
WARNING: Do not check motor rotation unless
motor is bolted to pump and drive coupling is removed.