Condensation Drain Holes; Water Leakage Detector - ABB M3LP 280 SM Manuel Supplémentaire

8 9 A K K 1 0 4 3 7 8 M L 1 0 - 2 0 2 0
Filling or draining cooling water
When filling, open the air plug on top of the mo-
tor (fig. 1). Let the cooling water flow into the
motor until it comes out of the air gap. Close the
air gap with a plug and seal the joint with seal-
ing tape or strip. Filling must be done carefully
so that no air is left in the motor's cooling chan-
nels. Check for possible leaks after the piping
and joints have been connected.
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Condensation drain holes

It is of special importance with water cooled
motors that the condensation drain holes are lo-
cated in the correct position (fig. 1). Check that
the condensation drain holes face downwards,
especially when the mounting arrangement dif-
fers from standard.
—

Water leakage detector

As an option, there is the possibility to order the
motors with a float type leakage detector (fig.
2). The leakage detector has a magnetic float
switch. The magnetic float switch is positioned
on a non-magnetic guide tube. When a specified
water level is reached, the magnetic field pro-
duced by the magnet in the float actuates a reed
switch (sealed contact) inside the guide tube.
This closes the electric circuit that transmits the
alarm signal to the control board.
When emptying, open the emptying plug under-
neath the motor and the air plug on top of the
motor. In motor sizes 280–315 emptying can be
done with pressurized air. After emptying, the
plugs must be re-fitted and the seals of the
joints must be checked.
Vertical mounting of the motor has only one
leakage detector, while horizontal mounting has
two. The detectors are connected in the lowest
part of the motor and vertically installed accord-
ing to the mounting arrangement of the motor.
The maximum deviation from the vertical axis
line is ±30°.
Electrical connection of float switch
max. voltage max. current 1 A
230 V DC/AC
switch capacity
100 VA