Maintenance And Support; Replacing The Mechanical Seal; Replacing The Motor; Troubleshooting Table - Franklin Electric E-Tech EV 1 Manuel D'utilisation Et D'installation

Operating and installation manual

7 MAINTENANCE AND SUPPORT

WARNING: Before any repairs to the electric pump, check that the power
supply is disconnected and that it cannot be accidently reconnected during
maintenance operations.
WARNING: If the electric pump is used for hot and/or hazardous liquids,
inform the personnel who will carry out the repair. In this case, clean the pump
so as to guarantee the safety of the operator.
WARNING: Repairing or having the electric pump repaired by personnel not
authorised by the manufacturing company means losing the warranty and
operating with unsafe and potentially hazardous equipment.
WARNING: Pay attention to discharged liquid so that it cannot cause damage
to people or things.
The electric pump does not require any ordinary scheduled maintenance. If the user
wishes to prepare a scheduled maintenance plan, bear in mind that the due dates
depend on the type of liquid pumped and the running conditions.
For the spare parts and the maintenance instructions, please contact our sales&service dpt.
Spare parts see fig. 21/22/23

7.1 Replacing the motor

For all versions of the pump with motor of rated power less or equal to 4kW, first
remove the coupling safety casings to access the motor clamping screws (see fig.20).
For all other versions, the motor clamping screws are easily accessible.
For all other versions, the motor clamping screws are easily accessible on the exterior
(see fig.19). The motor shaft must have a key drive.
PROBLEM
9.1
The pump turns but does
not deliver
9.2 The pump vibrates
9.3
The motor heats up
abnormally
9.4 The pump does not deliver
sufficient pressure
9.5 The automatic circuit
breaker trips
9.6 The flow is not regular

TROUBLESHOOTING TABLE:

CAUSE
a) The internal parts are obstructed by foreign bodies:
b) Suction pipe is blocked:
c) Air is entering the suction pipe:
d) The pump is unprimed:
e) The suction pressure is too low and generally
accompanied by cavitation noise:
f) Voltage is insufficient to power the motor:
a) Anchorage on a faulty base:
b) Foreign bodies obstructing the pump:
c) Obstruction in the pump rotation:
d) Faulty electrical connection:
a) Insufficient voltage:
b) Pump blocked by foreign bodies:
c) Ambient temperature higher than +40°C:
d) Connection error in the terminal board:
a) The motor is not rotating at normal speed (foreign bodies
or faulty power supply etc.):
b) The motor is faulty:
c) Pump is not filling properly:
d) The motor rotates in reverse (three-phase motor):
e) The discharge-priming cap is not fully screwed on:
f) Voltage is insufficient to power the motor:
a) Relay value too low:
b) Voltage is too low:
c) Interruption of a phase:
d) The relay is faulty:
a) The suction height is not being observed:
b) The suction piping has a diameter smaller than that of the
pump:
c) The filter and the suction piping are partially blocked:
Note: It is not necessary to carry out any operations on the pump shaft
and motor shaft connection joints.
WARNING: Replace the safety casings where necessary; failure to observe
these instructions may cause personal injury.

7.2 Replacing the mechanical seal

The type of mechanical seal can be identifi ed from the pump Identifi cation Code point
4.1 and from fi g.14.
For the models with motor power less or equal to 4kW, follow the instructions in fig. 11;
for motor power bigger than 4kW, instructions in fig.12
8 DISPOSAL
The disposal of this product, or part thereof, must be executed using local public or
private waste collection.
9 TROUBLESHOOTING
WARNING: Before any repairs to the electric pump, check that the power
supply is disconnected and that it cannot be accidently reconnected during
maintenance operations.
WARNING: If the electric pump is used for hazardous liquids, inform the
personnel who will carry out the repair. In this case, clean the pump so as to
guarantee the safety of the operator.
For problems and solutions, consult also table below:
TROUBLESHOOTING TABLE
ACTION
Have the pump dismantled and cleaned.
Clean the pipe.
Check that the pipe is airtight right up to the pump and seal.
Re-prime it by filling the pump. Check that the base valve is
air tight.
Excessive loss of head in suction or the suction height is
excessive (check the NPSH of the installed pump).
Check the voltage of the motor terminals and the correct
diameter of the connections.
Check and fully tighten the nuts on the bolts of the studs.
Have the pump disassembled and cleaned.
Check that the pump can rotate freely without any abnormal
resistance.
Check the pump connections.
Check the voltage at the motor terminals. The voltage should
be ± 10% of the rated voltage (± 6% si 60 Hz).
Have the pump dismantled and cleaned.
The motor is designed to function at a maximum ambient
temperature of + 40°C.
d) Connection error in the terminal board: Follow the
instructions on the motor plate and FIG. 4
Have the pump dismantled and correct the problem.
Replace it.
Open the bleed valve of the pump and bleed until all air
bubbles disappear.
Invert the rotation direction by exchanging two phase wires on
the motor terminal board or the motor protection breaker.
Check it and tighten it
Check the voltage of the motor terminals and the correct
diameter of the connections.
Check the intensity with an ammeter or record the intensity
value indicated on the motor plate.
Check that the diameter of the conductors of the electrical
cable is the right one.
Check the electrical cable or fuse and replace, if necessary,.
Replace it.
Check the installation conditions and the recommendations
contained in this manual.
The suction piping should have the same diameter as the
pump suction mouth.
Clean the suction duct.
ENGLISH
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