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20
Before starting the pump:
✔ Rotate the shaft by hand to assure all moving parts are free.
✔ Install packing.
✔ Install water lubrication line to seal box and turn on water.
Check pressure and flow.
✔ If pump has a seal box with packing, adjust the packing gland finger-tight. Refer to Packing Adjustment
in the Maintenance section to properly adjust packing.
✔ Install protective guards around all exposed rotating parts.
✔ Observe all DANGER, WARNING and CAUTION tags attached to this equipment.
✔ Ensure water in sump is at the specified level for adequate submergence.
If excessive vibration or noise occurs during operation, shut the pump down and review the Troubleshooting section
on page 22. If the problem cannot be corrected, consult a Fairbanks Nijhuis representative.
Operating at Reduced Capacity:
In a typical application covering a wide range of flow rates, a variable
speed driver is often used to adjust pump capacity, and this is taken
into consideration by Fairbanks Nijhuis when selecting the pump and
impeller trim. Although these pumps are applicable over a wide range
of operating conditions, care should be exercised when doing so,
especially when the actual conditions differ from the sold conditions.
You should always contact your nearest Fairbanks Nijhuis distributor
or factory before operating the pumps at any condition other than that
for which they were sold.
Generally, these pumps can be operated continuously at a capacity shown in Table 7 of the full pump capacity at the
and at higher capacities. At capacities less than shown in Table 7 of the full capacity, the pumps may show
accelerated wear and exhibit higher vibration levels. Pumps should not be run at lower capacities than shown in
Table 7. Pump CANNOT be run at shutoff.
Initial Start-up:
Inspect the complete installation to ensure that the installation instructions of this manual, and the manuals of all the
related equipment, have been followed and that the installation is complete. Use the Prestart-up and Start-up Check
List found at the end of this document.
Ensure that the driver is properly serviced and that the proper pump rotation is obtained. Rotate the pump shaft by
hand. It should rotate freely on all motor driven installations.
Start the pump according to the following procedure:
A.
Install protective guards around all exposed rotating parts.
B.
Start water lubrication system. Refer to drawing 24LYA1934-148 on page 14 for assembling the system.
Refer to drawing 24LYA1934-147 on page 13 for flush water requirements.
C. Start the driver according to the driver manufacturer's instructions.
D. Immediately after the pump has been started, check water lubrication system, seal box lubrication and
operation, and pump noise level. Continue to monitor these for the first several hours of operation.
E.
Check the driver and other necessary equipment for satisfactory operation following their manuals.
F.
Check the foundation for integrity.
G. After the first shutdown, repeat the impeller adjustment. Running may have tightened up some of the shaft
joints, changing the original setting.
If pump is equipped with mechanical seal, seal gland should be loosened before impeller adjustment is made
and then reset seal. Refer to Seal Installation on page 10.
Fairbanks Nijhuis™
VTSH
-SCR Vertical Turbine Solids Handling Screw Pumps
®
Installation, Operation and Maintenance
IMPORTANT:
Table 7: Pump Capacities
Pump Size
Capacity
8"
50%
10"
40%
12"
40%
5/30/2016
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