Wilo XI4-OR Série Notice De Montage page 10

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5.4 Installation
DANGER! Risk of falling!
When installing the unit and its accessories,
work is sometimes performed directly at
the edge of the well or tank. Carelessness or
wearing inappropriate clothing could result
in a fall. There is a risk of fatal injury! Take all
safety precautions to prevent a fall.
• Power supply cables must be routed in such a way
that safe operation and trouble-free installation/
dismantling are possible at all times. The motor/
unit must never be carried or dragged by the
power supply cable.
Check the cable cross-section and the routing
type chosen. Make sure that the cable length is
sufficient.
• When using switchgear, the corresponding
protection class should be observed. Switchgears
are to be generally arranged so that they are
overflow-proof.
• Observe all regulations, rules and laws for working
with heavy loads and under suspended loads.
Wear appropriate protective clothing.
• Observe nationally applicable accident prevention
and safety regulations of trade associations.
NOTICE:
• To achieve the necessary cooling, the motor
must always be immersed when in operation.
The minimum water submersion must be en-
sured at all times!
• Never let the pump run dry! If the water level
fluctuates strongly, we recommend installing
additional dry-running protection!
• No additional non-return valve may be used on
the pressure side. This would result in system
malfunction.
• A diaphragm expansion tank (1 – 2 litres) must
be installed between the frequency converter
and the tap. This minimises the number of starts
in the event of small leaks in the pipe system.
For more detailed descriptions, see the instal-
lation and operating instructions of the unit/
hydraulics.
5.4.1 Motor filling
The motor is filled ex works with food-safe white
oil that is potentially biodegradable. This oil filling
guarantees that the pump is frost-proof at tem-
peratures down to -15 °C.
The motor is designed in such a way that it can-
not be filled from outside. Only the manufacturer
can fill the motor.
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5.5 Dry-running protection
Submersible motors are cooled by the fluid.
Therefore, the motor must always be immersed.
The unit must therefore always be immersed in
the fluid up to the top edge of the hydraulics
housing. For optimum operational reliability, we
recommend installing a dry-running protection
system.
Dry-running protection is provided with the help
of electrodes or level sensors. The signal trans-
mitter is fixed in the borehole/pump chamber/
basin and switches off the motor when the water
level falls below the minimum water submersion
level.
If the dry-running protection is implemented us-
ing only one floater or electrode and the fill levels
deviate significantly, there is a risk that the motor
may switch on and off constantly!
This can result in the maximum number of
motor activations (switching cycles) being
exceeded and the motor overheating.
5.6 Electrical connection
DANGER! Risk of fatal injury due to electrical
current!
Incorrect electrical connection can cause fatal
electric shocks. Electrical connection may
only be carried out by a qualified electrician
approved by the local energy supply company,
in accordance with locally applicable regula-
tions.
• The mains connection current and voltage must
be as stated on the rating plate.
• Connect the power supply cable in accordance
with the applicable standards and regulations and
according to the conductor assignment.
• The power supply cable connected at the factory
has to be extended to the necessary length,
according to the available space in the borehole,
using heat-shrink tubing or a cast resin connec-
tion, by the customer before installation.
• Any available monitoring devices must be con-
nected and tested to ensure that it is working
properly.
• Earth the motor and entire unit according to the
regulations.
Units that are permanently installed must be
earthed in accordance with nationally applicable
standards. If a separate protective earth con-
ductor is available, it must be connected to the
marked drilled hole or earth terminal (;) using
a suitable screw, nut, serrated washer and flat
washer. The cross-section of the cable for the
protective earth conductor connection must
comply with local regulations.
• A power supply separator (main switch) must be
provided by the customer!
• We recommend using a residual-current de-
vice (RCD).
• Switchgears must be purchased as accessories.
INSTALLATION
WILO SE 12-2017 DIN A4