4-1
4. Operation
4.1
Check items before test operation
4.1.1
Check
items related to the electrical system
Warning
Before changing the wiring, be sure to turn off the main power supply.
Otherwise, you may receive an electric shock.
Warning
Do not use the product at any voltage other than the rated value.
A fire or electric shock may occur.
(1) Check that the equipment is correctly wired.
(2) Check that the terminals are securely connected.
(3) Check that the equipment is securely grounded.
(4) Check that the setup value of the overload protection device is consistent with the rated current
value of the motor.
4.1.2 Check items related to the pump
Caution
Do not put a cover or a filter over the motor. The temperature may rise
inside the motor, thus leading to failures.
Caution
Do not allow a large amount of foreign matter to enter the pump. Failure to
observe this may cause damage to the sliding parts (e.g. bearings) inside
the pump, leakage or unusual noise.
Caution
Ensure that a strainer is installed at the suction side of the pump
(Recommended strainer mesh: 40 mesh for normal use, 80 mesh for
cleaning). Foreign matters may enter the pump and cause damage to the
sliding parts (such as bearings, mechanical seal) in the pump, leakage or
unusual noise.
(1) Check that the gland packing is correctly installed. (SP(3)/SP(3)-e, MSP/MSP-e)
(2) Be sure to close the sluice valve on the suction and discharge sides of the pump to drain the water
inside the pipes by natural drainage or other methods.
(3) Rotate the pump shaft by hand to check smooth rotation. For SP (3)/SP (3)-e and MSP/MSP-e,
grip the coupling or the shaft by hand to rotate the shaft. For MTP/MTP-e, insert a flat-blade
screwdriver through the fan cover of the motor and turn its shaft. If the rotation is stiff or not
uniform, there may be some rust or foreign matter inside the pump. Inspect the pump in such a
case.
