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Electrical Connection
Ensure all electrical connections are solid and continuous.
Check motor starter and overloads for correct rating and trip
setting. All circuit breakers, HRC fuses or protective devices
associated with the motor must be rated to suit motor running
current and starting characteristics.
Starting
Caution: Do not attempt to run pump if it has
not been filled with water (primed).
Severe damage will result to shaft seal.
1) Ensure the suction line & pump casing is full of water open
suction valve if fitted.
2) Check power is off & rotate the pump shaft slowly to
release any trapped air within the pump casing.
3) Close the discharge valve.
4) Check the direction of rotation on the pump casing or
motor cover.
5) Prior to initial start up, the following steps must be taken:
• Insulation resistance test. On machines up to 600 volt, the
minimum value should be 1MΩ.
• Thermistors if fitted, should be checked for continuity with a
multimeter and never mega-tested.
• Ensure supply voltage and frequency correspond to the
motor nameplate ratings.
• Ensure shaft turns freely before initial start.
• Measure stator resistance and record in Log Book.
6) If this is correct you may now start the pump, when
it reaches full speed you will see the pressure in the
discharge line rise. Slowly open the discharge valve until
the pump adjusts to maintain its duty point.
Structural Representation
1. Motor
2. Mech. seal
3. Back plate
4. Pump body
5. Float neck ring
6. Impeller
7. Impeller nut
8. Spring washer
9. Key
10. Drain plug
11. O-ring
12. Stub shaft
13. Coupling guard
14. Bell housing
15. Screw
16. Spring washer
17. Motor foot
Trouble Shooting
Pump is running but failing to deliver water or desired
pressure.
1)
Turn the unit off.
2)
Check suction line is free of debris or blockages and
check that the pump has not lost its prime. If so,
remove blockage & repeat Starting at step 1).
3)
Check that the suction valve is open.
4)
Check that the discharge valve is open.
5)
Check for air leaks. These may not always be visible
to the naked eye unless pressure is applied to the
suction line.
6)
Check that the suction line is not too long.
7)
Is suction line to pump excessive?
8)
Is the foot valve stuck open or undersized?
9)
Is speed too slow?
10) Check motor direction rotation.
11) Check for possible clogging in impeller vanes
12) Is the discharge piping undersized for applications.
Excessive Vibration
1)
Turn the unit off.
2)
Check the motor is rotating in correct direction.
3)
Check both motor feet & pump feet are secured
properly.
4)
Check drive coupling is secured tightly to the motor
shaft.
5)
Check motor bearings are OK.
6)
Impeller could be partially blocked causing imbalance.
Noisy Operation
1)
Turn the unit off.
2)
Check motor bearings.
3)
Check pump is primed.
4)
Check suction line is not damaged, causing insufficient
supply & resulting in cavitation.
5)
Check you are not pumping solids.
High Power Consumption
1)
Check direction of rotation.
2)
Check operating speed on the motor matches the
intended performance curve speed.
3)
Check that the estimated head is correct, as pump
may be running down on its curve, producing high flow
and drawing more power. Throttle the pump back on
to its curve via discharge gate valve or reduce impeller
diameter.
4)
The Specific Gravity or Density of the liquid is greater
than 1kg/litre affecting power draw.
5)
Check impeller diameter for the correct size, to
establish maximum power requirement at duty point.
Lubrication
Motor bearings are lubricated with lithium based rolling
contact bearing grease, suitable for operation with-in the
cooling air temperature range of -20
o
C to +55
o
C. For
operation outside this temperature range, special lubricants
are required.
Special lubricants or additional maintenance may be required
in the case of motors exposed to comparatively high degrees
of pollution, high humidity, increased or changed bearing
loads, or prolonged continuous operation.
1
5
6
7
8
9
10
11
12
13
15, 16
14
17
2
3
4
WARNING: When installing, servicing or
attending pump, always ensure power is
switched off and lead unplugged. Electrical
connections should be serviced only by
qualified persons. If the electrical supply lead
is damaged, it must be replaced.
Summary of Contents for CS Series
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