Mitsubishi Electric 800 Series Instruction Manual page 37

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 Arrangement of multiple inverters

When multiple inverters are placed in the same enclosure, generally arrange them horizontally as shown in the right figure (a).

When it is inevitable to arrange them vertically to minimize space, take such measures as to provide guides since heat from

the bottom inverters can increase the temperatures in the top inverters, causing inverter failures.

When mounting multiple inverters, fully take caution not to make the surrounding air temperature of the inverter higher than the

permissible value by providing ventilation and increasing the enclosure size.

• Arrangement of multiple inverters

(a) Horizontal arrangement

 Arrangement of the ventilation fan and inverter

Heat generated in the inverter 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 inverter to cool air.)

• Arrangement of the ventilation fan and inverter

2. INSTALLATION AND WIRING

2.3 Installation of the inverter and enclosure design

(b) Vertical arrangement

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