Goulds Pumps VS - IOM - Manual (Page 14)

A. One part cement
B. Two parts sand
C. Four parts gravel
D. With sufficient water to make a stiff mix
4-3 MOTOR AND CABLE CHECKS AND
PREPARATION
CAUTION
DO NOT USE MOTOR LEADS TO LIFT OR HAN-
DLE THE MOTOR. THE MOTOR LEADS ARE EASI-
LY DAMAGED. THEY SHOULD BE PROTECTED
AND HANDLED WITH CARE AT ALL TIMES.
A. MOTOR SERVICING
Consult the motor manual and perform any
pre-installation servicing that is required.
Some motors may require filling with oil or
water.
B. ASSEMBLE OF MOTOR TO PUMP
If the pump and motor have not already been
assembled, assemble per the instructions
given in Appendix A. For extra long units, it
may be more practical to assemble the pump
to the motor in the vertical position at the
installation site.
C. TESTING BEFORE SPLICING POWER
CABLE TO MOTOR LEADS
Perform the following tests before making the
splice between the motor leads and the drop
cable. Instructions for performing resistance
tests and evaluating the results are given in
Appendix C.
Motor Tests
• Measure the resistance between each motor
lead and ground with the motor submerged in
water. (See Appendix C)
• Measure the resistance of the motor windings.
(See appendix C) Record the values for future
reference.
• Secure the pump and motor with chain tongs to
resist torque. Energize the motor momentarily
(on and immediately off) to check the rotation.
WARNING
GROUND THE UNIT WHEN TESTING. FAILURE TO
GROUND THE UNIT PROPERLY CAN RESULT IN
SERIOUS OR FATAL SHOCK. ALSO, THE HIGH
STARTING TORQUE OF THE MOTOR WILL CAUSE
IT TO ‘KICK’ WHEN POWER IS APPLIED. THE
UNIT SHOULD BE RESTRAINED SUFFICIENTLY
TO PREVENT DAMAGE TO THE EQUIPMENT OR
PERSONAL INJURY.
NOTE
ROTATION WILL BE COUNTERCLOCKWISE
WHEN VIEWED FROM THE DISCHARGED BOWL.
On three phase unit, if rotation is wrong, interchange
any two of the motor leads at the control panel.
CAUTION
CORRECT ROTATION IS OF EXTREME IMPOR-
TANCE. EXCESSIVE OVER-LOADS MAY BE
DEVELOPED UNDER OPERATING CONDITIONS
WITH REVERSE ROTATION.
Drop Cable Test
• Measure the resistance between the cable
conductors and ground with the cable sub-
merged in water. (See Appendix C)
D. SPLICING POWER CABLE TO MOTOR LEADS
A waterproof splice must be made to connect
the power cable to the motor leads. A proper-
ly made splice will last the life of the pump.
An improperly made splice will become a
service problem. Make the splice per instruc-
tions supplied with the drop cable or per
instructions in the pump motor manual. The
splice should be located above the pump
bowl. It should be as compact as possible. A
compact splice is less likely to be damaged
as the pump is being lowered into the well.
(See Appendix B for instruction on splicing
the cable.)
E. TESTING AFTER SPLICING POWER CABLE
TO MOTOR LEAD
Perform the following test after making the splice,
but before lowering the pump into the well.
• Check that the splice is waterproof by
immersing it in a container of water for
approximately one hour and then taking
resistance readings between each cable con-
ductor and the water. (See Appendix C)
• Measure the total resistance of the complete
drop cable and motor circuit to insure that a
good splice was made. Record the values for
future reference.
CAUTION
THE MINIMUM READING FOR EACH LEAD TO
GROUND SHOULD BE 50 MEGOHMS.
6