Validity; Handling - ABB M3LP 280 SM Manuel Supplémentaire

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Validity

This additional installation, operation, and main-
tenance manual is valid for water cooled motors
(M3LP 280–500) and is to be read together with
the main manual (Low Voltage Motors/Manual).
Additional information may be required for some
machines due to special application and/or
design considerations.
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Handling

Should the motor be used or stored in
environments with the risk of sub-zero
temperatures, freezing of the water inside the
motor must be prevented. This can be done either
by emptying the water jacket or by using anti-
freeze additives.
Before emptying the water jacket, protect it with
a corrosion-protective emulsion, e.g. Esso Cutwell
40, Shell Dromus Oil BS, or equivalent, in
accordance with the instructions given by the
emulsion manufacturer. If the motor has been
standing for a long period of time with no water,
ensure that water can circulate freely before using
the motor again. Remove possible rust blockages
by dissolving them with oxalic acid:
1. Empty the frame of water.
2. Fill the frame with water mixed with oxalic acid
(100 g/ liter).
3. Let the acid take effect for approximately
10 minutes.
4. Empty the frame and wash it with pressurized
water.
5. Repeat the treatment if necessary.
Use
Normally, water cooled motors are manufactured
to specific customer requirements. However,
these instructions refer to 'standard' water
cooled motor versions.
If the motor is equipped with a separate bearing
fan, ensure that there is free ventilation airflow.
Installation of a motor with a bearing fan in a
closed flange construction (i.e. flange-mounted
motor) is not recommended.
Cleaning of motor cooling system helps to restore
system efficiency. ABB recommends using regular
flushing and cyclonic or magnetic filters, which
should be regularly maintained. Flushing can be
done as described above.
Check that water in the system is neutral or near
neutral pH after flushing.
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