Commissioning An External Fan - Siemens SIMOTICS 1PQ8 Operating Instructions Manual

Procedure
1. Remove the bearing, regreasing pipes, grease nipples and the bearing cap.
2. Flush out the old grease.
3. Check the bearings before regreasing. If necessary, install new bearings.
4. Lubricate the bearings and reinstall the bearing components.
See also
Types and quantities of grease for high-speed machines (Page 117)
Regreasing intervals and types of grease for operating roller bearings (Page 113)
Stoppages (Page 100)
Transport and storage (Page 36)
7.5

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
● 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
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
SIMOTICS TN Series N-compact 1PQ8
Operating Instructions 11/2018
made.
parts.
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.
7.5 Commissioning an external fan
Start-up
93