•
When the rotation is correct, mark the leads. At this time, copy the full load amperes from the motor
name plate. This data will be required before starting the unit for the first time after it is in the well.
CAUTION:
With the lifting hook in place, secure the cable above the lifting hook to avoid tension on the
motor leads and splice.
5.6 Lowering Pump into Well
1.
Raise the bowl/motor assembly with the shipping skids still in place. Remove the shipping skids,
and lower into well, clamping the bowl assembly near the top.
2.
Attach the elevators to the bottom column pipe immediately below the column coupling. Hoist the
column section into place above the well and the top of the bowl assembly, providing a soft board or
pipe dolly for the end of the column pipe to slide in on so that threads will not be damaged while the
section is being raised. Clean all threads and paint with thread lubricant. Thread the pipe into the
discharge case connection and make up tight, using one set of chain tongs for back-up. The dis-
charge pipe threads must be made up tight so that the motor torque will not loosen the joint during
start-ups. A minimum torqueing force of ten foot pounds per rated motor horsepower must be ap-
plied to each threaded joint in order to resist the reaction of the torque applied by the motor during
starts and stops.
3.
Lower the unit into the operating location with the various pipe sections. Make up each joint tight as
described above, keeping in mind the minimum figure of 10 foot pounds per horsepower. Be very
careful to keep the electrical cable from rubbing over sharp edges and position the elevators so as
to avoid damage to the cable. Avoid twisting the unit, wrapping the cable around the pipe. Mount a
cable guard directly above the couplings in convenient spacing. The cable guard spacing should not
exceed 20 feet in any case. The first cable guard should be applied just above the splice and as
near the bowl assembly as practical. Be sure that the cable remains reasonably taut and on the
same side of the discharge pipe during complete installation. Place the final cable guard approxi-
mately 3 feet below the surface plate, leaving a small amount of slack in the cable. If other types of
cable guards are used, refer to the assembly drawing for installation. Lower the discharge elbow
into position on the discharge pipe and make up tight. Insert cable through surface plate or through
channel if provided in foundation and on into the terminal box or to the motor control panel.
4.
The unit may now be lowered onto the foundation, with extreme care to avoid damage to the electri-
cal cable. Lowering must be done gently and evenly with no jerks or impacts. Insert flange bolts if
used and tighten evenly. Any future disassembly may be accomplished by reversing the procedure.
5.7 Current Check
With a suitable ammeter, read the current of the three phases immediately upon starting, then while
pump is running at its rated capacity and head. The average of the three current readings in the three
phases should be approximately equal to full load current on the nameplate, assuming a full torque load
on the motor. If the average current exceeds the nameplate value by over 15% at any time, stop the unit
immediately. Such high current is an indication that something is wrong, the cause of which must be de-
termined before the motor is operated. Please note that this is a quick initial check. Actual power input
must be established with a watt-hour meter.
5.8 Voltage Check
In addition to showing proper average current, the individual values of line current should be approxi-
mately equal. If the current in any leg differs from the average value of all three by more than 5%, the
supply voltage is probably unbalanced. A voltmeter reading should be taken on each of the three phases
with the pump running. The average of the readings should be within plus or minus 10% of the motor
nameplate rating at the motor, allowing for losses in the electrical conductor from point of reading to the
5.6 Lowering Pump into Well
VIS Installation, Operation and Maintenance Instructions
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