Anti-Condensation Heating; Rolling Bearings; Installing Rolling Bearings - Siemens SIMOTICS XP 1MB 5/6 Series Operating Instructions Manual

9.3.2

Anti-condensation heating

Explosion hazard due to improper maintenance of the anti-condensation heating
If the anti-condensation heating is not correctly repaired, e.g. if unauthorized or untested spare
parts are used, this can result in explosions during operation in a potentially explosive
atmosphere. This can result in death, serious injury or material damage.
• Only appropriately trained specialists in the service center are authorized to repair anti-
condensation heating systems. The anti-condensation heating must then be subject to a
routine test, which requires extensive specialist knowledge.
• Only use authorized and tested spare parts.
9.3.3

Rolling bearings

Refer to the rating plate or the catalog for the designations of the bearings being used.
Note
Bearing seals for explosion-protected machines
For explosion-protected machines, only use the original replacement and repair parts.
Danger as a result of rotor falling out
If the motor is in a vertical position, the rotor can fall out while work is being performed on the
locating bearing. This can result in death, serious injury or damage.
• Support or unload the rotor when carrying out work with the machine in a vertical position.
Explosion hazard due to overheating of the rolling bearings
If the rolling bearings are not regularly regreased, local overheating may be possible, and, as a
consequence, an explosion in an explosive atmosphere. This can result in death, serious injury
or material damage.
• Regrease the rolling bearings regularly according to the lubrication plate.
• Implement bearing temperature monitoring if not yet in existence.
9.3.3.1

Installing rolling bearings

• Extreme caution and attention to cleanliness are vital when installing rolling bearings.
Observe the correct assembly sequence of the components.
• Attach all components with the specified tightening torques (Page 155).
1MB..5/6 shaft height 71 ... 355
Operating Instructions, 11/2023, A5E52779956A
WARNING
Maintenance
9.3 Corrective Maintenance
127