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7. MAINTENANCE
7.1 Maintenance frequency
Perform a periodical check based on the following indications:
Unit/Item
At commissioning
Every 6 months minimum
Turbine
Check the direction of rotation and the absence
of friction between the moving parts and the fixed
parts
Clean if necessary, check the absence of
friction between the moving parts and the
fixed parts
Controller
Check the connections, especially those to earth
Retighten the terminals if necessary, check
the rated current
Switch
Check the connections, especially those to earth
Tighten the terminals if necessary
Plastic cap
Check that the cooling vents are not obstructed
Check the general condition, check that the
cooling vents are not obstructed
Protective grilles
Check the presence
Clean if necessary
Duct networks
Check the sealing
Clean if necessary
Fastenings
Check the tightness
Tighten the screws if necessary
Pressure tapping
Check the aeraulic connections
Check the operation
The frequency of maintenance depends on the operating conditions. If the air is heavily charged with im-
purities, the time between two visits should be shortened and comply with regulations.
The engines used do not require any special maintenance. They are equipped with sealed bearings
greased for life.
Before any maintenance operation, cut off the power supply upstream of the unit and make sure that the
following conditions are met that it cannot be restored during the operation (lockout).
Removal of the guard for access to the fan
• Remove the guard by unscrewing the self-tap-
ping screws dia. 4.2 (key 8).