Operation And Management - Faggiolati Pumps AJ10 Instrucciones De Instalacion Y Uso

5.2 WIRING AND
FIG.PAGES 34-39).
Never open the aerator motor. Always call in a
qualified expert if necessary.
Qualified personnel must carry out all wiring and
grounding in strict accordance with all the relevant safety
norms and regulations.
Aerator motors may require 220, 380, 415, 500 or 550 V.
Always specify which voltage is required for the motor
and whether starting is to be direct or star-delta. Check that
the voltage on the aerator nameplate corresponds to the
power supply voltage. Because the aerator motor is
submerged grounding is essential.
The ground wire is yellow/green. All yellow/green
grounding wires must be connected to the unit's grounding
circuit before being connected to other conductors, and
they must be the last to be disconnected during
disassembly. The free ends of the cables must never be wet
or submerged in water or liquids. Remember that power
will peak to six times as much as usual strength during
direct starting and double for star-delta starting; therefore
line fuses must be large enough to withstand this peaking.
Control panel
The control panel may be a normal overload
cut-out for direct starts or an overload cut-out breaker for
star-delta starts.
Direct starting: set the overload cut-out to a maximum or
lower level to that specified on the nameplate.
Star-delta starting: regulate the thermal breaker to max
0.58 times the nominal input specified on the nameplate.
If the overload cut-out triggers while the aerator is
running, check the fuses before trying to start the motor
again.
Never force the motor to run without identifying and
correcting the fault. If necessary consult a technician.
Rotation direction
The rotation direction must be checked each
time the motor is started or there has been a
drop in phase or voltage. (SEE FIG. 17, PAGE 44). The
aerator rotator should rotate to the right, looking at the
aerator from above (the unit may be powered up to check
rotation direction before being submerged). If the rotation
direction is incorrect, air suction will not occur and the
motor will overcharge with a greater absorption of
electricity than usual. If the rotation direction is incorrect
the ends of the power supply lines should be inverted on
the control panel.
6. OPERATION AND RUNNING
6.1 START UP
If start up is unsuccessful (start group fails to peak), do not
try repeatedly, this only risks damaging the motor. Identify
and rectify the cause of the dysfunction.
For indirect start up the start up transient should be brief
and not last more
GROUNDING (SEE
than a few seconds.
en « Translation of the original instructions »
6.2 RUNNING AND INSPECTION
WARNING: Once the submersible aerator has
been installed it does not require any
particular maintenance, but to ensure long-
term smooth running the aerator's hydraulics should be
periodically inspected to make sure that it is not obstructed
by any solids or strands of solid material present in the
liquid. Carry out preventive inspections and maintenance
every 5000 - 10,000 running, depending on the severity of
the workload. Check:
-electrical insulation of the motor and power supply cable
(see "Wiring and grounding");
-the condition of the oil (see the "Maintenance" section);
-the hydraulics (see the "Maintenance" section).
Check the electrical panel, if present, every 6 / 12 months.
If it is not working correctly proceed as instructed in this
manual.
6.3 MAINTENANCE
Routine maintenance and any repairs to the
unit must be carried out by qualified
personnel using the correct tools and
equipment who have studied and understood
the contents of this manual and any other
documentation enclosed with the unit.
If the unit is opened for maintenance purposes
the screws must be tightened following the table on PAGE
44 when it is closed again. Unscheduled maintenance must
be carried out by an authorized repair shop.
Seal check
Make sure that both seals are fully waterproof and there
are no infiltrations. Make sure that no liquid has found its
way into the stator housing or oil tank through other
channels. If the aerator or seal is new, inspect after it has
been running for a week. Under normal operating
conditions the aerator should be inspected at least once a
year. If operational conditions are particularly harsh
inspections should be carried out more frequently.
Oil tank inspection
Raise the aerator on blocks and remove the
inspection screw with a spanner, draining the oil
off into a container. If the oil is unadulterated the seal is
intact. Make sure that there has been no significant
decrease in the amount of oil. Pour the oil back into the
tank. If it is a yellowish-grey colour and viscous or there is
water present it means that the seal or the bearing is
damaged and requires replacing. In this case the aerator
should be taken to a workshop for a general overhaul. Fill
the tank with sealing oil.
Tighten the tank's drainage and filling screws to prevent
infiltration. Replace the screw washers.
These operations should be carried out by an authorized
repair shop.
11