Biral FEX Instructions D'installation Et D'entretien page 103

5 Assembly/installation instructions
All impact, friction, and application of force should be avoided during assem-
bly! Do not pull on, kink, or otherwise deform the supply lines (cables). The
smallest permitted bend radius must be at least 5 times the cable diameter.
The free cable ends must be protected against the infiltration of water and
moisture. All safety measures described in the applicable standards must be
adhered to.
Note the maximum immersion depth of the pump
(see nameplate)
The operator is responsible for employing suitable measures (e.g. installation
of alarm systems, reserve pumps, or similar) to prevent further damage result-
ing from faults on the pump.
After assembly of the pump, the shaft opening must be equipped with a suitable
cover. For surfaces that are travelled on, the cover must be dimensioned to
match the expected wheel pressure. For surfaces not travelled on, the cover
must be capable of bearing walking weight as a minimum.
If the pumps are used for cleaning or maintenance in swimming pools, it must
be ensured that no persons are present in the pump medium and that the
pumps are equipped with a residual current-operated protective device with a
rated residual current of no more than 30 mA.
In particular:
– Good ventilation of the collecting shaft to prevent the build-up of explosive gases.
– The switching devices installed outside the shaft must be protected from the influences of
weather.
– The volume of the collecting shaft must be selected so that values do not fall below any of
the limit values defined under "Usage limits" and "Technical Data" – e.g. no. of pumps per
hour, pump standstill time, etc. – at any time.
– The suction nozzle of the pump must be at the lowest position of the collecting shaft.
– The entry of liquid into the collecting shaft must not generate any turbulence that could lead
to the intake of air through the pump (baffle or guide plates).
– To prevent potential blockages/deposits, it must be ensured that the flow rate in the pressur-
ised line never drops below 0.8 m/s.
– To avoid unnecessary loss of flow and noise emissions, the maximum flow rate should not
exceed 2.3 m/s.
– The vertical sections should be as short as possible and the horizontal sections should have
a slight slope in the direction of the flow.
– The installation of a non-return valve and stop valve is highly recommended. Where possi-
ble, ensure that these are mounted in a horizontal and easily accessible section of the pipe.
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