13
Use and installation instruction manual
ENGLISH
• Check for any liquid leaking from the mechanical seal by checking the motor
support area.
Check guards for proper positioning and safety devices for proper operation on
a daily basis.
It is advisable to check the condition of cables (especially at the cable glands)
every month and clean the system filters and/or suction grille.
Prevent dust build-up on the motor and obstructions to the cooling airflow.
9 EMERGENCY MANAGEMENT
9.1 Fire
• The only machine part exposed to a fire hazard is the motor. However, a fire
hazard also exists for materials unrelated to the machine but located close to it.
• In the event of a fire, use extinguishers approved for electrical devices.
9.2 Liquid spills
• The pumped liquid may escape from the machine as a result of installation,
start-up, maintenance or disposal , unforeseen breakages or excessive wear of
sealing devices.
• If spills can be dangerous or harmful to human,animal or environmental health,
install a waterproof collecting basin around the machine. Collect the liquid and
dispose of it correctly, without dispersing it in the environment.
10 TROUBLESHOOTING
To fix problems related to electric pump operation, follow the instructions in
Table 1. If you do not have the necessary knowledge and skills, contact qualified
personnel.
Always use PPE (see relevant section) and appropriate tools.
11 DISPOSAL
The devices marked with this symbol may not be disposed of in
domestic waste but disposed of in appropriate local collection
centres for Waste Electrical and Electronic Equipment (WEEE)
or delivered to the distributor who is required to collect them.
The product is not potentially dangerous for human health and
the environment as it does not contain any harmful substances
pursuant to Directive 2011/65/EU (RoHS), but if dispersed in the
environment it will adversely impact the ecosystem. The illegal or
improper disposal of the product involves severe criminal and/or
administrative penalties.
TABLE 1 - TROUBLESHOOTING
FAULT
POSSIBLE CAUSES
SOLUTIONS
10.1
The pump runs but does not
deliver
a) The internal parts are blocked by foreign bodies:
Disassemble the pump and clean.
b) Clogged suction pipe:
Clean the pipe.
c) Air inside the suction pipe:
Check the watertight integrity of the entire pipe up to the pump and
waterproof it.
d) The pump is not primed:
Fill and prime the pump. Check the watertight integrity of the foot valve.
e) The suction pressure is too low and generally accompanied by
cavitation noises:
Too many pressure drops on the suction side or the suction height is too
high (check the NPSH of the installed pump).
f)
Insufficient motor voltage:
Check the voltage of the motor terminals and the correct cross-section
of the conductors.
10.2
The pump vibrates
a) Faulty anchoring to the surface:
Check and fully tighten the nuts of the stud bolts.
b) Foreign bodies obstruct the pump:
Disassemble the pump and clean.
c) Obstructed pump rotation:
Check that the pump turns freely without any abnormal resistances.
d) Faulty electrical connection:
Check the connections to the pump.
10.3
The motor
heats up abnormally
a) Insufficient voltage:
Check the voltage at the motor terminals. The voltage must be ± 6% of
the rated voltage.
b) Pump obstructed by foreign bodies:
Disassemble the pump and clean.
c) Room temperature exc40°C:
The motor is designed to operate at a maximum room temperature of
+ 40°C.
d) Connection error in the terminal block:
Check that the connections comply with the diagram shown inside on
the terminal cover and the rating plate.
10.4
The pump does not deliver the
expected performance
a) The motor does not run at normal speed (foreign bodies or faulty
power supply, etc.):
Dismantle the pump and correct the anomaly.
b) Faulty motor:
Replace it.
c) Poor pump filling:
Repeat the priming operation.
d) The motor turns in the wrong direction (three-phase motor):
Reverse the direction of rotation by crossing 2 phase wires in the
terminal block or the electric panel.
e) Insufficient motor voltage:
Check the voltage to the motor terminals and the correct cross-section
of the conductors.
10.5
The circuit breaker trips
a) Thermal relay value too low:
Check the intensity with an ammeter, set the intensity value indicated on
the motor rating plate.
b) Voltage too low:
Check that the cross-section of the electrical cable conductors is correct.
c) Phase down:
Check and replace the electric cable or fuse if required.
d) Faulty thermal relay:
Replace it.
10.6
The flow rate is not regular
a) The suction height has not been adhered to:
Review the installation conditions and recommendations provided in
this manual.
b) The suction pipe has a lower diameter than that of the pump:
The suction pipe must have the same diameter as the pump suction
hole.
c) The strainer and the suction pipe are partially clogged:
Clean the suction pipe.
