a) Mount a dial indicator off of any rigid structure not tied to the piping.
b) Set the indicator button on the pump flange in the axial direction of the nozzle.
If the indicator moves as the filling proceeds, then the anchors and supports are not adequate or
are not set properly. Take corrective measures.
5.4 Start the pump
1.
Close the drain valves.
2.
Completely open all valves in the suction and discharge lines.
3.
Turn on the seal water to the stuffing box.
These lines must always be left open if the pumped fluid is dirty or if there is the possibility of air
leaks.
4.
Prime the pump.
NOTICE:
Make sure that the pump is properly primed. If it is not, then shut down the pump and correct
the condition.
5.
Start the pump driver.
Turbines and engines can require a brief warm-up period. Consult the instructions provided by the
engine manufacturer.
6.
When the pump is operating at full speed, make sure that the check valve has opened.
The check valve must open five seconds or less after startup in order to prevent damage to the
pump by operating at zero flow.
7.
Adjust the liquid seal valves to produce the recommended pressure for either the mechanical seal
or the packed stuffing box.
5.5 Operational checklist
Check
Explanation/comment
Checked
Driver rotation
Check the rotation each time the motor leads are disconnected.
WARNING:
Check the rotation of the power unit and pump in rela-
tion to that of the drive as shown by the arrows on the
case. Rotate the drive manually before you apply pow-
er-checking rotation. Do not operate in the reverse di-
rection of these arrows as serious damage or injury
can occur.
Stuffing box adjustment
Make stuffing box packing gland and lubrication adjustments.
Flow
It is difficult to accurately measure flow rate (volume/time). Any of the fol-
lowing methods of measuring can be used:
•
Venturi meters
•
Flow nozzles
•
Orifice plates
•
Timing the draw down in the wet well
Record any reading for future reference.
5.4 Start the pump
34
Model 3409 Installation, Operation, and Maintenance Manual
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