Electrical Check List - White S4A Installation And Operating Manual

If the unit is installed in the bore, then the correct direction of rotation is the one that will give maximum head
(pressure) at the same capacity.
To correct a reversed rotation, change any two leads (except earth) from the three phase supply at the motor
starter. Mark the leads so that the wires will in future be reconnected to the correct terminals of the starter.
Single phase motors wired incorrectly can also operate in reverse. Check wiring.
EARTHING SINGLE AND THREE PHASE PUMPS
All Pump motors are equipped with an earth lead which must be connected to the earth of the incoming power
supply. Further, control boxes and starters must also be earthed. If Testing or used outside a well, the motor
must be connected to the power supply earth lead to prevent a lethal shock hazard.

ELECTRICAL CHECK LIST

It is recommended that where possible, all electrical connections be carried out before delivery to site.
Always check that the motor gland is tight.
Check control boxes, motors and pumps are as ordered and correctly matched.
Check the motor resistances before and after crimping the drop cable to the motor lead, using the charts
supplied, and before the water proof heat shrink is applied.
Make sure that the water proof heat shrink is heated sufficiently to cause resin to flow to create a water tight
seal.
If possible, it is good to practice run the pump briefly in a container of water (water must be over the suction
inlet) to check on operation before installation in the bore.
Drop cable should be affixed at three metre intervals by a suitable underwater tape with the cable having some
slackness between each interval to compensate for the expansion of the polythene pipe when under load.
DELIVERY PIPING
Large diameter pipe should be used for long runs to compensate for pressure losses due to friction.
Long pipe runs can cause water hammer and damage to pumping systems. Consult your local borehole specialist
as additional check valve and water hammer arrestor (pressure tank) may need to be fitted.
PUMP SWITCHING
By Float Switches, Pressure Switches, Timers etc.
(See also section headed "Pressure System Installation"
Provided the switching device used has an adequate current rating, it may be connected directly into the supply
line to 240 volt motor control boxes. If the current rating of the switch is not adequate, a starter contactor
must be wired into the supply, and the switching device connected to the control circuit of the starter
contactor.
In the case of three phase motors, all switching devices should be wired to the control circuit of a suitable
starter contactor, and on no account should they be used to directly break the supply circuit to the pump.
NOTE: Any automatic switching of the pump greater than 20 starts per hour will shorten the motor life and
may void warranty.
DAB Submersible Pump Installation Instructions 2013 rev 1
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