38 Mechanical installation
Disposition of the devices
For easy installation and maintenance, a spacious layout is recommended. Sufficient
cooling air flow, obligatory clearances, cables and cable support structures all require
space.
For layout examples, see section Cooling and degrees of protection.
Preventing the recirculation of hot air
COOL AREA
Air baffle plates
Airflow in
Outside the cabinet
Prevent hot air circulation outside the cabinet by leading the outgoing hot air away
from th
e area where the inlet air to the cabinet is taken. Possible solutions are listed
below:
• gratings that guide air flow at the air inlet and outlet
• air inlet and outlet at diffe
rent sides of the cabinet
• cool air inlet in the lower part of the front door and an extra exhaust fan on the roof
of the cabinet.
Inside the cabinet
Prevent hot air circulation inside the cabinet with leak-proof air baffle plates. No
ga
skets are usually required.
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