INSTALLATION
24
5.3.4 Frequency controller
If the hose pump is fitted with a frequency controller,
consider the following points:
• Take precautions so the motor does not re-start
automatically after an unscheduled stop.
In the event of a power or mechanical failure,
the frequency controller controls the motor to
stop. When the cause of the failure is removed,
the motor can restart automatically. The
automatic restart can be dangerous in certain
pump installations.
• All control cables outside the enclosure must be
shielded and have a cross sectional area
between 0.22 and 1 mm
2
. The shielding must
be connected to earth at both ends.
Maximum permissible loads [N] on the
pump connections
Force Bredel 10 Bredel 15 Bredel 20
F1 600 600 600
F2 300 300 300
F3 120 120 120
WARNING
A frequency controller that is fitted without
the manual control can start automatically
when power is applied.
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