4.6 Ensure adequate cooling
WARNING
Overheating and failure of the motor
Death, severe injury or material damage can occur if you do not strictly comply with the
following points, for explosion-proof machines, an explosion can occur.
• Do not obstruct the ventilation.
• Prevent the air expelled by neighboring equipment from being immediately sucked in again.
• For vertical types of machine construction with the air intake from above, protect the air
intakes from the ingress of foreign bodies and water.
• If the shaft extension is facing upwards, liquid must be prevented from entering by moving
along the shaft.
WARNING
Damage to the ventilation system
Material damage and injury can occur if the fan is destroyed and therefore the machine
overheats.
• Prevent foreign bodies from falling into the fan cover. For vertical machine installation with
the shaft end facing downwards, attach a protective canopy.
• Take suitable measures to prevent water from entering the ventilation system. The optional
canopy is not suitable as protection against water ingress.
• Ensure that the cooling air ow is not reduced as a result of covers and that the minimum
air clearances are maintained.
For machines with separately driven fans, install an interlock circuit that prevents the main
machine being switched on if the separately driven fan is not operational.
Table 4-1 Air guidance
Incorrect Correct
Preparing for use
4.6Ensure adequate cooling
1LE1, 1FP1/3, 1PC1/3 shaft height 63 ... 315
Operating Instructions, 11/2023, A5E38483075A 39
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