Mitsubishi Electric 800 Series Instruction Manual page 38

• For heat dissipation and maintenance, keep clearance between the inverter and the other devices or enclosure surface.
The clearance below the inverter is required as a wiring space, and the clearance above the inverter is required as a heat
dissipation space.
Allow clearance.
*1 When using the inverters at the surrounding air temperature of 40°C or less, the inverters can be installed closely attached (0 cm clearance).
• When tightening screws into the upper mounting holes, tilt the screwdriver seven to ten degrees (FR-E820-0008(0.1K) to
0050(0.75K), and FR-E820S-0030(0.4K) or lower)
Screwdriver Screwdriver Screwdriver
• When designing or building an enclosure for the inverter, carefully consider influencing factors such as heat generation of
the contained devices and the operating environment.
 Installation orientation of the inverter
Install the inverter on a wall as specified. Do not mount it horizontally or in any other way.
 Above the inverter
Heat is blown up from inside the inverter by the small fan built in the unit. Any equipment placed above the inverter should be
heat resistant.
 Arrangement of multiple inverters
When multiple inverters are placed in the same enclosure, generally arrange them horizontally as shown in the figure (a). When
it is inevitable to arrange them vertically to minimize space, take such measures as to provide guides between the inverters
since heat generated in the inverters in bottom row can increase the temperatures in the inverters in top row, causing inverter
failures.
Clearances (front)
10 cm
or more
1 cm 1 cm
or more or more
Vertical
*1 *1
10 cm
or more
Screwdriver length: 135 mm or longer Screwdriver length: 135 mm or longer Screwdriver length: 135 mm or longer
7° to 10° 7° to 10° 7° to 10°
Clearances (side)
1 cm
or more
2. Installation and Wiring
2.3 Installation of the inverter and enclosure design
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