See also
7.1.5
Commissioning the separately driven fan
The separately driven fan ensures that the main machine is cooled irrespective of the main
machine speed or direction of rotation. The separately driven fan is only suitable for one
direction of rotation.
Checks before the first test run
Before the first test run, carry out the following checks:
• The separately driven 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.
• If the cooling air is in open circulation, it has only weak, chemically abrasive properties and
a low dust content.
• All protection measures have been taken to prevent accidental contact with moving or live
parts.
Performing the test run
1. Switch the separately driven fan motor on and off briefly.
2. Compare the direction of rotation of the separately driven fan with the specified direction of
rotation. The direction of rotation of the separately driven fan is indicated with an arrow on
the fan cover specifying the direction of rotation or with a terminal designation on the rating
plate of the separately driven fan unit.
Depending on the version, the fan impeller is visible through the air inlet opening in the fan
cover on the separately driven fan motor.
3. If the direction of rotation is wrong, then interchange 2 line cables in the separately driven
fan motor terminal box.
Note
Use these operating instructions for motors with external fans.
Commissioning
7.1 Measures before commissioning
1LE5, 1PC4 shaft heights 280 ... 355
82
Operating Instructions, 11/2022, A5E41454666A
