SAER Elettropompe NCB Serie Manuel D'emploi Et D'entretien page 28

8. DECOMISSIONING AND DISPOSAL
At the end of the operating life of the pump/electropump or any of its parts, it must be disposed of in observance of current regulations.In case you need
to return the material to the supplier :
completely empty the pump from the liquid and wash it carefully
−
if necessary, provide for a complete decontamination of the product,
−
remove any liquids or grease residues (lubricants etc ...)
−
protect the pump from corrosion and pack it carefully
−
indicate to the supplier any security measure applied
−
It is the responsibility of who returns the materials to take all measures necessary to ensure the safety of the product and
that the return is in accordance with the regulations of applicable law.
9. TROUBLESHOOTING
FAILURES OR
MALFUNCTIONS
! No flow
! Insufficient flow rate
! Outlet pressure too low
! High absorbtion
! Vibrations or high noise
28
ID PROBABLE REASONS
A.1 → Wrong direction of rotation
A.2 → Pump not filled with the fluid
Air presence in the pump or in the suction
A.3 →
pipeline
A.4 → Suction pipeline not enought immersed.
A.5 → Suction head too raised
A.6 → Impeller or suction line clogged.
A.7 → Isufficience of the motor rotation speed.
A.8 → Head of the pumping plant too hight.
→ Reasons already listed on previous points
B.1 → Cavitation functioning. NPSHa insufficient.
B.2 → Losses from the seals.
B.3 → Demaged impellers.
B.4 → Demaged wear rings.
B.5 → Foot valve too slim
→ Reasons already listed on previous points
C.1 → Outlet line ostructions
C.2 → Pressure gauge wrong positioning
→ Reasons already listed on previous points.
D.1 → Usury or mechanical seizure
Functioning out of performance curves.
D.2 → The head is lower than the minimum head
allowed
D.3 → Excessive tightening of the soft packing.
D.4 → Excessive speed of the motor speed rotation.
Fluid density / viscosity higher then of the
D.5 →
contractual ones
→
D.6 Misalignment between pump and motor
D.7 → Motor problems
→ Reason already listed on previous points.
E.1 → Pump, motor o basament not properly setted
E.2 → Pipeline misaligned or imposed on the pump
E.3 → Damaged bearings
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- Translation of the original instructions
REMEDY ACTIONS
Verify the rotation direction of the motor. If correct,
verify the right assembly of the impeller with the pump
3
body.
3 Fill the pump and the suction pipe, with the fluid.
Verify the possible losses of the pipeline. Breathe the
3
pump in order to get out the air.
Increase the immersion of the suction, that is
3
sublevelled
3 Low the level of the pump
Check any eventual obstuction of the sucton filters and
3
of the impeller. Remove the obstruction.
Check the motor rotation speed. For motors powered
3
by inverter, check the feed frequency.
Check the outlet valves holes. Make a calculation of
the pumping plant and compare it whit the one of the
3
pump. Use a pump with higher head.
Consider points: from A.1 to A.7
Icrease the pumping plant NPSHa, reducing the
suction losses, or approaching the pump to the fluid
3
that has to be aspirated.
3 Replace the seals
3 Replace the impeller.
3 Replace the wear rings.
3 Replace the foot valve .
Consider points: A.1, A.3 ÷ A.7,B.2 ÷ B.4
3 Remove the ostructions
Position the outlet pressure gauge on the outlet and the
3
inlet pressure gauge on the inlet
3 Consider points: A.1, B.1 ÷ B.3
Check and, where necessary, replace seals, bearings
and wear rings.
Act on the outlet regulation valve to increase the head
3
and low the flow rate.
3 Relax the tightening of the soft packing.
Check the corrispondence between motor speed and
pump. When the motor is powered by inverter, low the
3
frequency
3 Low the flow rate. Call the technical assistance
3 Check and realign pomp and motor.
3 Refer to motor informations.
3 Consider points: a3-a6, b1,b3-b4,d1,d2,d3, d5,d6, d7
3 Check the tightening of all anchor bolts
Support the pipes checking their alignment with the
3
pump.
3 Replace the bearings