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USE & MAINTENANCE
Starting
For starting operations refer to the instructions indicated
on the motor manual.
Before starting the electric pump carry out a final
check on the hydraulic connection and on the electrical
equipment and relevant ratings.
Activate all safety procedures foreseen and
check attentively the efficiency of protections.
When the electric pump is installed into wells
of particular depths, the column pipe must be
filled with water before running, to avoid the
consequences coming from the rotor rising
during starting.
If the electric motor is fitted for rotating in both
directions, start the electric pump with gate valve
slightly opened in order to check the correct rotation
according to pressure indicated on the pressure gauge.
If rotation is correct, the pressure gauge will indicate
the same pressure shown on the catalogue to a nearby
0 delivery. Worthy to remind that the height between
pressure gauge and dynamic level must be added to
the pressure value readable on the pressure gauge.
If rotation is wrong, pressure will be much lower, but the
absorbed current might be higher than the foreseen.
To invert rotation in three-phase motors swap over two
of the phase wires.
Never let pump functioning in wrong direction
for more than 3-4 minutes.
If the electric motor is fitted for rotating in one direction
only for the correct electric connection refer to
instructions indicated on the motor manual; even in
this case starting must be done with gate-valve slightly
open.
With the pump functioning, gradually open the gate-
valve up to reach the required performances, checking
with an amperometer, that the current absorbed does
not exceed the value shown on the motor plate.
If necessary lower the current absorbed (Amperes)
below the value shown on the motor plate, reducing the
capacity closing the gate-valve and, afterwards, setting
the protection relays accordingly.
The relay setting should never exceed the value
indicated on the motor plate.
Check that the capacity obtained is according to the
cooling conditions of electric motor.
Never let pump functioning with 0 capacity
(gate-valve closed) for more than 2-3 minutes.
6
On first startings of electric pump, it's necessary to
check that the pumped water is not cloudy with sand
or lime. In the affirmative, it's necessary to reduce
immediately the pump capacity, closing the gate-valve,
until the water is clear. This situation must be obtained
in a short time, max. 8-10 min.; on the contrary, to avoid
heavy damages to the pump, it's necessary to effect
a further cleaning of the well using a pump suitable to
this purpose.
Functioning
When respecting foreseen functioning limits the electric
pump will operate without vibrations or anomalous
noises.
Keep the hydraulic (capacity – pressure) and
electric working conditions within the values
shown on the plate (please refer to par. 3-4).
Incorrect installation or unsuitable use always causes
failure undue wears and dangerous damages.
Every 1000 hours approx. of functioning it's necessary
to check that operating data are respected; in case of
anomalies or variations of operating data refer to par. 8
following relevant suggestions .
Refer to information reported on the manual of the
electric motor too.
Maintenance and spare parts
When respecting foreseen functioning limits, ordinary
maintenance of the electric pump is not necessary.
Extraordinary maintenance and repairing
must be carried out by qualified and
skilled personnel.
Original spare parts only must be used.
For lifting out the electric pump from the well proceed
on the contrary of what stated for installation
(see par. 5). Always follow safety conditions (par. 2)
Before any intervention of checking or
maintenance it's indispensable to disconnect
electric power supply being sure that same
cannot be reconnected inadvertently; hearth
cables must be disconnected at the last.
When ordering spare parts indicate the following:
1) type of pump
2) serial number
3) position and denomination of parts
4) quantity.
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