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Operation
2. Before operation
Take the next steps to start the pump at the first operation or after a long period of storage.
1. Clean the inside of piping and a supply tank.
2. Retighten flange fixing bolts and base fixing bolts.
3. Prime the pump and shut off a discharge valve. Check an air vent line and a flushing line are closed.
4. Run the motor for a moment (within a second) in order to check if the motor rotates to the direction pointed by an
arrow label (clockwise seen from a motor fan). If the motor rotates in reverse, interchange two of three phase wires
at random.
3. Operation
■ Starting process
Operate the pump by the following procedure.
Operation procedure
Remarks
1
•
Close or open valves.
•
Open suction valves fully.
•
Open discharge valves fully.
2
•
Prime the pump.
•
Prime the pump unit and then close a discharge valve.
3
•
Check the motor for correct
rotating direction.
Turn on power and then
immediately (within one sec-
ond) switch off the power.
•
Supply power to run the pump only for checking a rotational direction. (The
correct direction is indicated with an arrow on the motor.)
•
Check if the motor fan smoothly stops after the power is turned off.
CAUTION
● The pump can be damaged when running in reverse rota-
tion for a long time.
● If the motor fan does not stop smoothly, internal parts may
contact each other. Check the inside of the pump.
4
•
Turn on power and start the
pump to adjust discharge
pressure and capacity.
Observer the minimum dis-
charge capacity. See below.
•
Run the pump with a discharge valve closed. Once a pressure gauge points
the max discharge pressure, open the discharge valve gradually to obtain a
specified discharge pressure (or discharge capacity).
NOTE: Start to open/close a discharge valve gradually to adjust dis-
charge pressure within one minute after the pump starts to run.
Always check a discharge pressure gauge (or adjust discharge
capacity by checking a flow meter).
CAUTION
Opening a valve sharply, the motor may be overloaded.
Always open a valve while checking ammeters.
