DAB S4, Instruction For Installation And Maintenance

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ENGLISH
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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