Warning
If the liquid used exceeds 40°C, do not touch the pump. The surface of the pump
may be so hot that it may cause burns.
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. 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, swap two of the three wires of the power cable.
Caution
Never check the rotation direction by running the pump dry. Running the pump
dry even for a short time may cause damage to the sliding parts (e.g. bearings,
mechanical seal) inside the pump, leakage or unusual noise.
Caution
Do not run the motor in reverse because it may cause a failure.
(2) Turn on the power to start the pump.
(3) During the initial period of pump operation and circulation, gradually open the sluice valve on the
discharge side to circulate liquid at a flow rate (flow velocity) higher than the normal operation.
After this circulation cleaning is complete, clean the strainer.
(4) Adjust the sluice valve on the discharge side so that the specified pressure is achieved.
Warning
Do not perform long hours of no-discharge operation continuously.
Failure to observe this may increase the temperature in the pump, resulting in an
unexpected failure.
(5) As a guide, limit the frequency of the startups and shutdowns to about five times an hour.
Caution
Minimize the frequency of startups and shutdowns of the pump because frequent
startups and shutdowns may damage the pump sooner than usual. Do not start
the pump more than five times an hour or so.
(6) In the event of a power failure during operation, be sure to turn off the power.
Warning
In the event of a power failure, be sure to turn off the main power. The pump may
suddenly start up on restoration of the power, thus leading to an injury.