Siemens 1MB115 Installation And Maintenance Manual page 120

!
Risk of explosion due to excessive bearing temperature
The surface temperature cannot be maintained within maximum
permissible limits if the bearing becomes too hot. The dust can ignite,
resulting in an explosion. This can result in death, serious injury or
material damage.
• Always check the bearing temperature.
• In addition to the current-dependent overload protection device located
6.1.4 Safety instructions for cleaning
To ensure problem-free machine cooling, the air ducts (ventilation grilles,
channels, cooling fins, tubes) must be free of pollution.
!
Risk of explosion when cleaning with compressed air
If you clean the machine with compressed air, plastic components may
become statically charged and ignite a potentially explosive atmosphere;
an explosion can occur. This can result in death, serious injury or material
damage.
• Do not use compressed air to clean motors when installed in hazardous
6.1.5 Safety instruction for cleaning fans
!
Risk of injury when touching the fan
There is a risk of injury at machines equipped with a fan cover (e.g. on
machines in the textile industry), as the fan is not completely touch
protected.
• Do not touch the rotating fan.
• Do not put your fingers into the larger air discharge openings.
• Prevent manual intervention by using suitable measures, e.g.
120
WARNING
in the three phases of the connecting cable, we recommend that you
also monitor the temperature rise in the motor with the aid of the
temperature sensors built into the stator winding.
WARNING
zones!
CAUTION
appropriate housings or a protective grating.