Xylem IMVIC R01 Model VIC Vertical Industrial Turbine Can Pumps - Manual (Page 21)

21
Pump Startup And Operation – SECTION 4
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
driver. 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.
Serious damage may result if pump is run
in the wrong direction.
Do not check motor rotation unless motor
is bolted to pump and drive coupling is
match marked and removed.
Be sure to install the coupling guards
around all exposed shafts and couplings
before start up of the pump. Failure to comply may result
in severe personnel injury or death.
C. Check alignment of pump and driver.
D. Impeller adjustment has been made.
E. Mechanical seal lock collar is attached to shaft.
2. For open lineshaft pump, make sure the stuffing box
relief (bleed) line is connected (if applicable).
3. For pump with mechanical seal, make sure mechani-
cal seal is properly lubricated and all piping to seal is
connected. Also, check that all cooling, heating and
flushing lines are operating and regulated.
4. Open the air release system isolation valve. Adjust
the air release system throttling device so that it is
partially open. It should not be closed or fully open.
NOTE: Not exhausting the air or exhausting it too fast
can damage the pump.
5. All connections to driver and starting device match
wiring diagram. Voltage, phase, and frequency on
motor nameplate agree with line current.
6. Rotate shaft manually to ensure impellers are not
binding.
7. Verify that driver bearings are properly lubricated
and check oil level in housing.
8. Check that auxiliary seal components are properly
vented.
9. Inspect discharge piping connection, valves and
pressure gauges for proper operation.
STARTUP PRECAUTIONS
1. All equipment and personal safety related devices
and controls must be installed and operating
properly.
2. To prevent premature pump failure at initial start-up
due to debris in the pipe system, ensure the system
has been adequately cleaned and flushed.
3. Variable speed drivers should be brought to rated
speed as quickly as possible.
4. Variable speed drivers should not be adjusted or
checked for speed governor or over-speed trip
settings while coupled to pump at initial startup. If
settings have not been verified, uncouple the unit
and refer to driver manufacturer’s instructions for
assistance.
5. Running a new or rebuilt pump at slow speeds
may not provide enough flow to adequately flush
and cool the stuffing box bushing’s close running
surfaces.
6. Pumpage temperatures in excess of 200º F (93º C)
will require warm-up of pump prior to operation.
Circulate a small amount of pumpage through the
pump until the casing temperature is within 100º
F (38º C) of the pumpage temperature and evenly
heated.
PRIMING
The pump must be properly vented
through the discharge head/barrel vent
connections. This is especially important for fluids with
suction pressure close to their vapor pressures. Vent
piping must be continuously rising back to source so that
fluid cannot collect in the vent line.
The first stage impeller must always be completely
submerged. Pump must not run dry as the rotating parts
within the pump may gall and seize to the stationary
parts. The parts must be lubricated by the liquid being
pumped.
NOTE: NPSHa must always exceed NPSHr as shown on
Goulds Water Technology performance curves.
NOTE: Pump must never be throttled on the suction
side by allowing suction strainer to become
clogged.
PUMP STARTUP
1. Partially close the valve in the 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 the pump. If any abnormal noises, jerking
or vibration is noted, stop the pump immediately,
determine the cause of the abnormalities and correct
them.
WARNING
WARNING
WARNING
CAUTION