Mitsubishi Electric FR-CC2-P Instruction Manual page 25

Installation of the converter unit and enclosure design
Encasing multiple inverters and converter units
When multiple inverters and converter units are placed in the same
enclosure, generally arrange them horizontally as shown in the
figure on the right. Do not place multiple converter units or the
converter unit and the inverter vertically. The exhaust air
temperature of the converter unit may be increased.
When mounting multiple inverters and converter units, fully take
caution not to make the surrounding air temperature of the inverter
and the converter unit higher than the permissible value by
providing ventilation and increasing the enclosure size.
Arrangement of the ventilation fan and the converter unit
Heat generated in the converter unit is blown up from the bottom of
the unit as warm air by the cooling fan. When installing a ventilation
fan for that heat, determine the place of ventilation fan installation
after fully considering an air flow. (Air passes through areas of low
resistance. Make an airway and airflow plates to expose the
converter unit to cool air.)
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INSTALLATION AND WIRING
Converter
Inverter
unit
Converter
Inverter
unit
Enclosure
Arrangement of multiple inverters and converter units
Converter
unit
<Good example>
Arrangement of the ventilation fan and the converter unit
Converter
Inverter
unit
Converter
unit
<Bad example>