Mechanical installation 69
Miscellaneous
Preventing the recirculation of hot air
Prevent hot air circulation outside the inverter by leading the outcoming hot air away from
the area where the inlet air to the inverter is taken. Also, ensure that the hot air from the
inverter module cubicle cannot enter the adjacent cubicles.
Ventilation duct at the air outlet of the cabinet
A ventilation duct can be constructed at the air outlet of the inverter cabinet. If an exhaust
fan is used, ensure that the capacity is sufficient. See Losses, cooling data and noise on
page 133.
Note: The ventilation system must keep the static pressure in the air outlet duct sufficiently
below the pressure of the room where the inverter is located in order that the cabinet fans
can produce the required air flow through the cabinet. Ensure that no dirty or moist air is
able to flow backward to the inverter in any case, even during off-time or while servicing
the inverter or the ventilation system.
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