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Translation of the original instructions
Release the three grub screws of the rotating part of the mechanical seal. NB: It
is sufficient to loosen them by a quarter turn. If they are loosened excessively, the
grub screws will lose their coupling with the mechanical seal.
Loosen the screws that secure the motor to the pump.
Loosen the coupling screws and remove the two parts of the coupling.
Remove the motor.
8.2.2 Pumps with a thrust bearing unit up to 4 kW (fig. A15)
Remove the coupling cover guards.
Release the three grub screws of the rotating part of the mechanical seal. NB: It
is sufficient to loosen them by a quarter turn. If they are loosened excessively, the
grub screws will lose their coupling with the mechanical seal.
Loosen the screws that secure the motor to the pump.
Loosen the coupling screws and remove the extractable part.
Remove the pin from the shaft.
Remove the motor and the thrust bearing unit.
Tighten the screws in the threaded holes in order to separate the motor from the
thrust bearing.
8.2.3 Pumps above 4 kW (fig. A20)
Loosen the screws that secure the motor to the pump.
Remove the motor. NB: Check that the flexible coupling insert is inside the hole in
the intermediate shaft of the pump. Reposition, if necessary.
8.3 Installing the optional thrust bearing unit
Only for pumps up to 4kW without a thrust bearing unit.
Follow the instructions to REMOVE THE MOTOR.
Follow the instructions for INSTALLING THE THRUST BEARING UNIT AND MOTOR
(Chap. 6).
8.4 Mechanical seal replacement
See fig. A26 for the spare parts.
8.4.1 Pumps up to 4 kW (fig. A16)
Follow the instructions to REMOVE THE MOTOR.
Loosen the mechanical seal cartridge.
Lubricate the shaft and thread with alcohol. Clean any residues.
Insert the new cartridge and tighten to the indicated tightening torque.
Follow the instructions for INSTALLING THE MOTOR (Chap. 6).
8.4.2 Pumps above 4 kW (fig. A21)
Remove the coupling cover guards.
Release the three grub screws of the rotating part of the mechanical seal. NB: It
is sufficient to loosen them by a quarter turn. If they are loosened excessively, the
grub screws will lose their coupling with the mechanical seal.
Loosen the coupling screws and remove the coupling.
Remove the pin.
Loosen the mechanical seal cartridge.
Lubricate the shaft and thread with alcohol. Clean any residues.
Insert the new cartridge and tighten to the indicated tightening torque.
Insert the pin in the shaft and in the hole of a part of the coupling.
Lift the coupling until it couples to the intermediate shaft's shoulder. The coupling
must remain in position once released. Couple the second part of the coupling.
Insert the screws and tighten them to the indicated tightening torque, making
sure to keep the two parts of the coupling symmetrical.
Tighten the three grub screws of the rotating part of the mechanical seal.
Check: manually turn the shaft and pay attention to any metallic noises, indicating
potential coupling problems. If so, contact the Manufacturer.
Install the coupling cover guards.
8.5 Motor replacement
Follow the instructions to REMOVE THE MOTOR.
8.5.1 Pumps without a thrust bearing unit up to 4 kW
PREPARATION OF THE MOTOR (fig. A17)
Extract the lowered tab from the old motor.
Remove the unified tab from the new motor, if applicable.
Install the lowered tab into the shaft slot of the new motor.
Follow the instructions for INSTALLING THE MOTOR (Chap. 6)
NB: before disposing of the old motor, make sure to extract the lowered tab from
the shaft's slot and keep it.
8.5.2 Pumps with a thrust bearing unit up to 4 kW
Follow the instructions for REMOVING THE THRUST BEARING UNIT (fig. A15).
Follow the instructions for INSTALLING THE THRUST BEARING UNIT AND MOTOR
(Chap. 6).
8.5.3 Pumps above 4 kW (fig. A20)
Follow the instructions to REMOVE THE MOTOR.
Follow the instructions for INSTALLING THE MOTOR.
16
VERTICAL MULTISTAGE ELECTRIC PUMPS
8.6 Lubricating the thrust bearing
Only for pumps above 11 kW:
The thrust bearing unit must be lubricated at intervals related to the criticality of
the application, number of pump stages and work (pressure) and environmental
(temperature) conditions. It is recommended to perform a first inspection after
3000 hours of operation. Then adjust the lubrication interval in relation to the
amount of grease inserted and the work conditions (maximum temperature and
pressure). Proceed as follows:
Follow the instructions to REMOVE THE MOTOR.
Apply grease type SKF LGHP 2 or equivalent using the provided grease nipple.
Pump grease and manually rotate the shaft to facilitate distribution.
Follow the instructions for INSTALLING THE MOTOR.
During the initial hours of operation, it is normal to see a slight increase in
temperature and excess leakage of grease until reaching the operating condition.
8.7 Motor rotation
8.7.1 Pumps up to 4 kW (fig. A12)
Remove the coupling cover guards (only for pumps up to 2.2kW).
Loosen the screws that secure the motor to the pump.
Rotate the motor by 90° or 180°.
Secure the motor to the pump using the screws. Tighten to the indicated
tightening torque.
Assemble the coupling cover guards.
8.7.2 Pumps above 4 kW (fig. A13):
Loosen the screws that secure the motor to the pump.
Rotate the motor by 90° or 180°.
Secure the motor to the pump using the screws. Tighten to the indicated
tightening torque.
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 releasing it into 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.
If the problem cannot be solved by following the instructions in the table, contact
a professional, authorised service centre
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.
Domestic WEEE (single-phase electric pumps with <3 kW
power) must be handed in to private or local collection
centres, retailers or repairers, at no cost.
Industrial WEEE (all products not classified as domestic)
must be delivered to specific collection centres or retailers
or repairers.
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
released into the environment it will adversely impact the
ecosystem.
The illegal or improper disposal of the product involves
severe criminal and/or administrative penalties.
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