Marina-Speroni ECM Notice D'instructions page 7

PROFESSIONAL SUBMERSIBLE PUMPS
Three-phase electrical hookup
ATTENTION! Make the earth connection before any
other connection (yellow-green cable). The three wires
must be connected to a three-phase line with voltage
and frequency equivalent to those indicated on the
plate, or to an electrical starting board with breakaway
starting current reduction devices where necessary
(see wiring diagram, picture 2).
Wiring diagram
THREE-PHASE SUBMERSIBLE PUMPS
POWER CABL
5.5. INSTALLING THE FLOATS
If the pump is equipped with a float, its operation is
automatic. It is important to fix the switches in such
a way that the related cables do not get tangled or
get caught in protuberances of the well, making sure
that no object can obstruct their movement.
The minimum level of the float must always and in
any case be higher than the motor body.
5.6. THERMAL PROBES
The single-phase motors have a built-in thermal protec-
tion device that resets automatically.
In the three-phase motors, this thermal protection of
the motor must be ensured by an external remote
switch.
5.7. CHECK FOR CORRECT OPERATION
When the pump, electrical board, and float
have been installed, it is important to perform
a test of the system to ensure that it is
operating correctly.
Also check that the float intervenes at established
levels and that the absorption on the phases is con-
gruous with the values shown on the pump rating
plate.
6. Maintenance
Before proceeding to any check or maintenance
operation, follow the instructions in section 1 "General
safety instructions" to the letter.
To ensure perfect operation of the pump over time,
the user must carry out routine checks and periodic
maintenance, replacing worn parts where necessary.
We recommend performing these preliminary testings
and maintenance at least once a month, or every
500-600 hours of operation.
BROWN L3
GREY or BLUE L2
L1
BLACK
YELLOW-GREEN
picture 2
– Check that the power supply voltage is within the
values shown on the rating plate.
– Check that there are no anomalous noises or
vibrations with respect to the optimal levels of the
first startup.
– For three-phase motors, use amperometric pliers
to check that the absorption levels on the three
phases are balanced and do not exceed the rating
plate values.
6.1. OIL CHECK AND CHANGE
Before proceeding to any check or maintenance
operation, follow the instructions in section 1 "General
safety instructions" to the letter.
Under normal operating conditions, the oil should be
changed every 7500 working hours; in more heavy-
duty conditions every 5000 hours, or at least once a
year.
This operation must be carried out as follows:
– With the pump in a horizontal position, unscrew
the lid of the oil chamber located on the opposite
side of the pump body from the delivery mouth,
and let the oil drain out into a suitable container.
ATTENTION! If the oil is replaced, do not disperse
the used oil in the environment but take it to the
specialised disposal bodies.
– Check that the oil is free of water; this means that
the mechanical seal is still firm and in order, and
the new oil can be poured in.
– If there are small drops of water on the bottom of
the catch basin and on the motor body, this should
be considered normal, as it is simply due to the
elimination of condensation.
– If there is water along with oil in the collection
receptacle, the mechanical seal should be replaced.
– Fill the oil chamber with biodegradable oil "PAO
ISO 100" type according to the quantity indicated
on the plate near the oil lid.
– When the oil has been changed, make sure that
the cap is thoroughly tightened and then re-install
the pump.
Pump repair must only be carried out by the manu-
facturer or by specialised technicians. Lack of respect
for this measure invalidates the warranty and jeopar-
dises the safety of the machine.
6.2. CHECKING THE PARTS SUBJECT
TO WEAR
Before proceeding to any check or maintenance
operation, follow the instructions in section 1 "General
safety instructions" to the letter.
During scheduled maintenance or in the event of
excessive noise, vibrations, or reduced pump perfor-
mance with respect to the original installation situation,
the hydraulic parts that are subject to wear must be
checked and if necessary replaced.
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