4-1
4. Operation
4.1 Check items before test operation
4.1.1
Check items related to the electrical system
(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.
Warning
Do not use the product at any voltage other than the rated voltage.
Otherwise, a fire or an electric shock may occur.
4.1.2
Check items related to the pump
Caution
Do not run the pump with its strainer removed. Failure to observe this may
cause an injury or damage.
Caution
Do not allow a large amount of foreign matter to get into the pump. Failure
to observe this may cause damage to the sliding parts (e.g. mechanical
seals and bearings) inside the pump, leakage, or unusual noise.
(1) Ensure that the oil level in the tank (oil tank) is above the "lowest oil level" position.
Caution
During test operation, never run the pump dry (i.e. never run the pump
when the liquid level is below the minimum level). During normal operation,
do not run the pump dry for more than 30 seconds. Failure to observe this
may cause the sliding parts (e.g. mechanical seals and bearings) inside
the pump to seize up.
(2) Check the rotational direction. Normal rotational direction is
counterclockwise rotation when viewed from the motor side. (See the
right figure.)
(3) Rotate the main shaft by hand to check smooth rotation. To rotate the
shaft by hand, 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 rusting or foreign matter inside the pump. Inspect the pump in such
a case.
Rotation direction
