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All electrical connections must be performed by
quali ed personnel working in accor
National and Local Electrical Codes.
a: Dischar ge method - Connect the leads to the
magnetic starter as in Step 2. Run the pump open
discharge. Change any two leads and run the pump
at open discharge again. The larger quantity of
water indicates the correct rotation.
b:
Pressure method - Connect the leads to the magnetic
starter as in Step 2. Run unit with closed discharge
and note the maximum pressure reading. Change
any two leads and run pump with closed discharge
again. Note maximum pressure reading. The higher
pressure reading indicates the correct rotation.
7.
After the pump has been installed and run,
subsequent electrical work near the installation may
change the rotation. Whenever a three phase pump
does not seem to be performing properly, the rotation
should be checked before the unit is pulled.
Lightning Arrestors
It is highly recommended that lightning arrestors
be installed in the starter or control box to ground
voltage surges. Lightning arrestors should be
grounded to metal riser pipe with ground clamp,
or to other suitable ground if plastic drop pipe is
used. All single phase Franklin motors have built-
in lightning protection and do not need an additional
arrestor. Three phase units require two arrestors,
and should be connected to the control as shown
at right.
If a lightning arrestor has already been installed at
the lead-in power lines and is within 15 metres (50
feet) of the pump installation, additional arrestors
are not necessary. Arrestors should be installed at
the control on overhead supply lines longer than
15 metres (50 feet). If the supply line to the control
is underground, an arrestor is not needed at the control.
System Connections & Operation
1.
Thread the cable through the hole in the bore cap. Be careful not to let the cable become pinched or damaged.
Make certain the bore cap is vented. Ample slack should be left in the cable below the bore cap and in the trench
(if the cable is buried underground) to allow for expansion and contraction.
2.
Install a shut-o (gate) valve and a union to facilitate installation and servicing. Use of a gate valve also permits
throttling for a weak supply.
3.
Start the pump with the gate valve slightly open. If rotation is incorrect, the gauge will show the pressure much
lower than it should be. A single phase motor always rotates in the correct direction. To reverse rotation in a 3-
phase motor, swap over two of the phase wires.
4.
Do not let the pump run in the wrong direction for more than 4 minutes. With the pump working, gradually open
the delivery gate valve using an ammeter to check the current does not exceed that shown on the plate. If
necessary, lower the amps by reducing delivery through the gate valve and adjusting the protection relay settings
accordingly. The overload settings should never exceed the those on the plate.
5.
With the motor running, check that the power supply voltage is ±5% of the nominal supply.
Final Checks
1.
Make certain all connections are properly made.
2.
Turn on current at mains isolation switch. Pump should start and water should ow within a few seconds,
depending on depth of setting of pump.
3.
Check the amperage with an ammeter and the voltage with a voltmeter. Compare the readings with pre-installation
tests and limits shown in Cable Selection Table.
4.
It is also recommended that a resistance reading be made. Power supply must be disconnected to make resistance
readings. These tests will determine if there is damage to the cable when installing or if motor windings are down
to earth.
5.
Also check line voltage at the control box or magnetic starter during start and run conditions.
"SC/SD" SERIES 4 Inch Submersible Pump Installation and Operation Manual
dance with
MAINS
L1 L2
ISOLATION
SWITCH OR
CIRCUIT
BREAKER
MAGNETIC
STARTER
L1
L2
L3
T2
T1
LIGHTNING
ARRESTORS
PUMP
MOTOR
SCHEMATIC WIRING DIAGRAM FOR MAGNETIC
GROUND
STARTER. HEAVY LINES INDICATE CONNECTIONS
TO BE MADE BY INSTALLER
MAGNETIC STARTER
L1
GROUND
WIRE
LIGHTNING
ARRESTOR
T1
TO MOTOR
GROUND CLAMP
STEEL RISER PIPE OR STEEL
GROUND STAKE
L3
PRESSURE
SWITCH
M
HOLD.
COIL
M
O/L
T3
L2
L3
LIGHTNING
ARRESTOR
T2
T3
Page 5
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