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Fig.Q KEY
A
Motor size
B
Adapter - motor screw
C
Coupling screw
Ø
Diameter
N•m Driving torque
Fig.R, Fig.S KEY
A
Impeller locking screw
B
Tie rod nut
C
Drum locking plate screws (and diffuser bushings, 125SV only)
D
Mechanical seal housing lock screws (and diffuser, 125SV only)
E
Fill plug with air valve
F
Fill/drain plugs
G
Gauge connection plug
H
Round counter flange screws
I
Oval counter flange screws
Ø
Diameter
N•m Driving torque
7. Maintenance, Service, Spare Parts
Before performing any maintenance operations on the
electric pump unit, make sure that the motor is voltage-
free.
Maintenance operations must be performed by skilled
and qualified personnel only. Use suitable equipment
and protection devices. Observe the accident prevention
regulations in force.
If pump must be drained, make sure that the drained
liquid does not cause damage or injuries.
The pump is supplied with a calibrated fork-shaped shim designed
to facilitate the motor coupling and replacement operations.
7.1 Routine Maintenance
The pump does not require any scheduled routine maintenance. In
general, the checking of the following aspects, or some of them,
at varying intervals depending on the operating conditions is
recommended: pumped liquid leaks, delivery pressure, starts per
hour, noise, triggering of the electrical protections (relays,
fuses,...).
If the user wishes to draw up a maintenance schedule, related
deadlines depend on the type of liquid pumped and on the
operating conditions.
7.2 Extraordinary Maintenance
Extraordinary maintenance may be necessary in order to clean the
liquid end or replace the mechanical seal and other worn parts.
7.3 Motor/Pump Coupling
The pump may be supplied without the electric motor. In this case
the calibrated fork-shaped shim is already inserted between the
adapter and the transmission coupling in order to keep the
impeller stack in the correct axial position. To prevent damage
during transportation, the pump shaft is held in position by
Styrofoam and two plastic straps. The bolts and nuts needed to
fasten the motor to the adaptor are not included. Refer to the
diagrams in Fig.U, Fig.V.to couple the pump to the motor.
7.3.1 Selecting the Electric Motor
If the pump alone has been bought, without the motor,
the safety of the coupled pump with a motor other
than those described in Lowara's catalogue must be
guaranteed by the person making the coupling.
Single-phase or three-phase motors whose size and power comply
with the European standards can be used.
Information for maintenance personnel
Use dynamically balanced motors, with half-
WARNING
sized key in the shaft extension (IEC 60034-
14) and with normal vibration rate (N).
7.4 Replacing the Motor
Refer to the diagrams in Fig.U, Fig.V.
If the calibrated fork-shaped shim is not available, use a 5 ± 0.1
mm shim.
7.5 Mechanical Seals
Basic characteristics of the mechanical seals
Pumps
Nominal diameter 12 mm, unbalanced, right-
1, 3, 5SV
hand rotation, K version (EN 12756)
Nominal diameter 16 mm, unbalanced, balanced
10, 15, 22SV
with motor power ≥ 5.5kW , right-hand
rotation, K version (EN 12756)
33, 46, 66, 92,
Nominal diameter 22 mm, balanced, right-hand
125SV
rotation, K version (EN 12756)
7.5.1 Replacing the Mechanical Seal on 1, 3, 5, 10, 15, 22SV
Series Pumps with motor power of 4kW or lower.
Contact the Sales and Service department.
7.5.2 Replacing the Mechanical Seal on 10, 15, 22SV (with motor
power ≥ 5.5kW), 33, 46, 66, 92, 125SV Series Pumps
Refer to the diagrams in Fig.X.
7.6 Service
Please contact the Sales and Service Department for any request or
information.
7.7 Spare Parts
Always specify the exact pump/electric pump
WARNING
unit type and identification code when
requesting technical information or spare parts from the Sales and
Service department.
Use only original spare parts to replace any worn or
faulty components. The use of unsuitable spare parts
may cause malfunctions, damage and injuries.
Refer to the diagrams in Fig.Y, W, Z.
8. Disposal
Information for installation and maintenance personnel
Observe the regulations and codes locally in force regarding
sorted waste disposal.
9. Special Version - Horizontal Installation
If pump must be installed in the horizontal position, a special
version and mounting brackets must be requested from the Sales
and Service Department.
Information for installers and users
en
21
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