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Explosion hazard
Components within the machine may be hotter than the maximum permissible surface
temperature of the enclosure. In an explosive atmosphere, dust can ignite and an explosion
occur. This can result in death, serious injury or material damage.
● Do not open the machine in an explosive and dusty atmosphere when it is still at normal
● Allow the machine to cool down before opening it.
● When disassembling, ensure that the parts necessary to seal the enclosure are not
Explosion hazard due to overheating of the machine caused by a layer of dust
Layers of dust thicker than 5mm can insulate the machine, resulting in overheating. The
maximum surface temperature of the machine cannot be adhered to. The dust can ignite,
resulting in an explosion. This can result in death, serious injury or material damage.
Dust the machine regularly. Do not allow dust layers thicker than 5 mm to build up on the
machine surface. Do not switch the machine on until the dust has been removed.
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 in the three phases
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 plastic parts in an explosive atmosphere. When cleaning
the machine, make sure that the air in the vicinity of the motor is free of gas and dust.
LOHER CHEMSTAR 1PS5
Operating Instructions 03/2014
WARNING
operating temperature.
damaged, for example seals, face/plane mating surfaces. Perform a new routine test for
the parts that have been repaired if these parts are crucial to ensure dust protection.
WARNING
WARNING
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
Maintenance
9.1 Inspection and maintenance
83
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