CAL Optional Design
- 6-
shown in (Fig 1.3-1), so that an air pocket is not present.
Fig 1.3-1
(5)
When connecting a valve to the discharge line, locate it as
close as possible to the discharge nozzle of the pump. To
provide a check valve, connect it between the pump
discharge port and the discharge valve.
(6)
Where no flushing is applied to pipeline, foreign matter
existing in the pipeline flows into the pump while the pump
is in initial running. Therefore, the pump inlet must be
provided a strainer no shut out inflow of such a foreign
matter. A strainer used must have the effective area as large
as 3 to 4 times the sectional area of the suction. If the
strainer is clogged during pump running, the indicated
value on the suction line pressure gauge will fluctuate. In
such a case, the strainer must be disconnected for removal
of clogged matter. The strainer can be removed when it can
be confirmed that no foreign object remains in the piping.
(7)
Small piping such as flushing, etc. are designed and
manufactured in alignment with the application and shape,
so that they can be easily connected to the pump. In this
case, too be careful no to apply abnormal piping load to the
pump components, similarly to the main piping.
Furthermore, prior to connecting, check internally each
small pipe for existence of residual foreign matter and, if
necessary, clean it for complete removal of residual foreign
matter.
(8)
High temperature or temperature fluctuation of lifting
liquid, if any, will result in expansion or shrinkage of the
pipeline. When such a phenomenon is forecast, add a
flexible pipe, etc. to the midway of the pipeline to protect
the pump from thermal expansion load.
(9)
After completion of all the piping connection, recheck the
pump to motor direct-coupled condition to confirm that it is
free from center-deviation caused by abnormal piping load.
2. Operation
2.1. Starting
When putting the pump in initial operation after the installation, be
sure to check the following items for normality, prior to starting. If
abnormality de found upon checking, take corrective actions in
accordance with the Troubleshooting Instructions given in this
Manual.
(1)
The rotational direction of the motor… Is the correct? The
correct direction is clockwise (CW) in face to the pump at
the motor side. With the pump using the flanged flexible
shaft joint, remove the coupling bolt when you check the
rotational direction. With the pump using the rubber shaft
joint, make sure that inside of the pump is completely filled
with pumped liquid before turning ON the motor switch.
Immediately after turning ON the motor switch, turn it OFF,
and check the rotational direction of the motor.
(2)
Verify that the pump shaft and the motor shaft are directly
connected in the specified centering condition. Verify that
the coupling bolt is mounted (when the flanged flexible
shaft joint is used), and that the set bolt is securely
tightened.
(3)
Are small pipes connected perfectly? Is the flushing liquid
injected and drained as specified?
(4)
In the case when a strainer is connected to the suction line,
is not it clogged with foreign matter?
(5)
Is the suction line valve fully opened? Is the discharge line
valve fully closed?
(6)
Are suction line and the pump internally full with pumped
liquid? Is air purged out of them? (No-load running of the
pump prohibited)
(7)
Check for leakage or other abnormal condition when the
suction pipe and inside of the pump are filled with pumped
liquid.
(8)
No leakage from the mechanical seal?
(9)
Can the coupling set be smoothly turned by hand? When
you turn the coupling manually, be sure to turn OFF the
motor switch, and affix a tag indicating “DO NOT TURN
ON” or the like to the switch so that the switch will not be
turned ON by mistake.
After checking the above items and making sure that there is
nothing abnormal, turn on the motor start switch and turn it off
immediately. Confirm that the pump runs smoothly and stops
quietly.
If nothing abnormal be found, turn on the motor start switch and
slowly open the discharge valve until the discharge flow reaches
