Davey ISOSPEC CF Series ISO2858 Heavy Duty Industrial Centrifugal Pump - Manual (Page 3)

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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) 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. Bearing housing 2. Shaft
3. Rear casing cover 4. Pump casing
5. Impeller 6. Impeller key
7. Impeller washer 8. Impeller nut
9. Volute drain plug 10. Bronze wear ring
11. Mechanical shaft seal 12. Bearing housing foot
13. Bearing lip seal 14. Bearing
15. Bearing cap 16. Water slinger
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
& 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 unit off
2) Check motor is rotating in correct direction
3) Check both motor feet & pump feet are secured
properly.
4) Check coupling rubbers are not worn
5) Check drive couplings are secured tightly to the
pump & drive shafts.
6) Check pump & motor bearings are OK
7) If so, alignment will need to be performed
8) Impeller could be partially blocked causing
imbalance
Noisy Operation
1)
Turn unit off
2) Check pump or 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 but 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
Pump bearings are greased for life.
Motor bearings refer to Motor manufacturers
recommendations.
In accordance with AS 3350.2.41 we are obliged
to inform you that this pump is not to be used by
children or infirm persons and must not be used
as a toy by children.