Table of Contents
Advertisement
See also
Preparations for use (Page 31)
7.1.4
Commissioning an external fan
An external fan is suitable for use only in unidirectional operation; refer to the specification of
the direction of rotation on the fan cowl or on the fan unit. The external fan ensures that the
machine is cooled irrespective of the machine speed or direction of rotation.
If the cooling air is in open circulation, it must have only weak, chemically abrasive properties
and only a low dust content.
Checks before the first test run
Before the first test run, carry out the following checks:
● The external fan is correctly fitted and aligned.
● The rotor runs freely.
● All of the retaining elements and electrical connections are securely tightened.
● The grounding and equipotential bonding connections to the mains have been correctly
made.
● The air flow is not impeded or shut off by flaps, covers or similar.
● All protection measures have been taken to prevent accidental contact with moving or live
parts.
Performing the test run
1. Switch the external fan motor on and off briefly.
2. Compare the the direction of rotation of the external fan with the arrow indicating the
direction of rotation. If the direction of rotation and the arrow do not match, then switch
two of the three phases of the external fan motor.
Note
Use these operating instructions for motors with external fans.
1MB155 / 1MB555
Operating Instructions, 03/2018, A5E41926185A
7.1 Measures before commissioning
Start-up
87
Advertisement
Table of Contents
