4-2
Warning
Before rotating the main shaft by hand to check it, be sure to turn off the main
power. An unexpected start of the pump may cause an accident.
(4) If the sluice valve is installed on the suction side, fully open the valve.
(5) Prime the pump until water overflows from the priming funnel or the priming port. At that time,
loosen the air vent cock to release air from the pump.
Warning
When priming the pump (air venting), prevent the damage of the motor and
parts from the spouting water.
Caution
Never run the pump dry (operation without priming). Failure to observe this
may cause the sliding parts inside the pump to seize up.
(6) Check that the alignment of the shaft. Re-align it, if necessary, referring to “3-3. Installation
procedure (8).”
4.2
Running the pump (test operation)
Warning
Do not operate the pump if any abnormal condition is observed or if there is
anything wrong with the parts, components, and others during the check
before test operation. Failure to observe this may cause an injury, failure,
accident, or other problems.
Warning
Be sure to put a shaft coupling protective cover during operation. Failure to
observe this you may cause an injury.
Warning
Be sure to attach the cover of the terminal box of the motor. Failure to observe
this may cause an electric shock.
Caution
Do not run the pump dry, and do not allow a large amount of air or foreign
matter to enter the pump. Failure to observe this may cause damage to the
sliding parts (e.g. bearings, mechanical seal) inside the pump, disability of
pumping, leakage or unusual noise. It may also heat the pump, thus leading to
burns.
(1) Check the rotation direction of the pump by turning ON and OFF the power switch once or twice.
Normal rotation is clockwise when viewed from the motor side.
If the pump shaft rotates in reverse,
for three-phase models: swap two of the three wires of the power cable; and
for single-phase models: after reviewing the correct wiring pattern, rewire.
