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7. INSTALLATION
Installation must be carried out by competent, skilled personnel in possession of the technical qualifications
required by the specific legislation in force. The term skilled personnel means persons whose training,
experience and instruction, as well as their knowledge of the respective standards and requirements for
accident prevention and working conditions, have been approved by the person in charge of plant safety,
authorizing them to perform all the necessary activities, during which they are able to recognize and avoid all
dangers. (Definition for technical personnel IEC 364)
The appliance may not be used by children under 8 years old or by persons with reduced physical, sensory or
mental capacities, or who lack experience or knowledge, unless they are under supervision or after they have
received instructions concerning the safe use of the appliance and the understanding of the dangers involved.
Children must not play with the appliance.
First of all, the power supply cable must be examined carefully, to exclude with absolute certainty the presence
of any damage. In particular, it must be checked that the cable has not been twisted, bent or crushed. Never
use the power cable to carry the pump or to lower it into the well. Lower the pump into the well using a
suspension cable. The end of the power cable must be protected from moisture. The installation depth of the
pump must be studied according to the dimensions indicated on the well drawing.
1. The pump can be lowered into wells with diameter 4” or
more.
The diameter of the well must remain constant to allow a
total descent without excessive pressure.
It is possible to install the pumps in tanks and cisterns as
long as the pump is always in a vertical position and
immersed in water. In case of horizontal installation,
consider the use of a cooling jacket.
2. The pump must be lowered into the well by means of a
nylon or steel suspension cable. No traction of any kind
must be exerted on the electric cable of the motor. The
electrical cable must be secured with plastic clamps every
two or three metres along the delivery pipe. In the case of
flanged delivery pipes, the flanges themselves must be
provided with recesses with well-rounded edges to
accommodate the cable.
3. If the delivery line consists of pipe sections screwed
together, make sure that they are safely tightened to prevent
the pipe becoming unscrewed by the torque force due to
motor kickback when starting.
4. Install the pump at a distance of at least 30 cm from the
bottom of the well in order to prevent sand getting into the
motor and the suction of impurities.
The pump must be completely submerged when operating.
If the water level is susceptible to frequent changes, the
system should be equipped with a water shortage protection
system to avoid the risk of dry running. When the pump is
installed in a borehole with a diameter slightly larger than its
own, make sure that the descent is not prevented by
obstructions.
Fig.2 Example of installation
8. ELECTRICAL CONNECTIONS
For the electrical connections, please refer to the SAFETY INSTRUCTIONS BOOKLET EN-60335-1
The mains voltage must be the same as that on the motor data plate.
Connect to the mains with a two-pole switch, with contact opening distance of at least 3 mm.
Correctly size the cross section of the power supply cable in relation to the length to avoid voltage losses.
Install a high-sensitivity differential switch (0.03A) as additional protection or compatible with the control
equipment (e.g. Inverter).