Mitsubishi Electric FR-F800 Series Instruction Manual page 43

Allow clearance.
*1 For the FR-F820-00250(5.5K) or lower and FR-F840-00126(5.5K) or lower, allow 1 cm or more clearance.
*2 When using the FR-F820-01250(30K) or lower and FR-F840-00620(30K) or lower at the surrounding air temperature of 40°C or less (30°C or
less for the SLD rated inverter), inverters can be mounted side by side without leaving any clearance.
*3 There needs to be a space of at least 30 cm in front of the inverter to replace the cooling fan of the FR-F840-04320(185K) or higher. Refer to
page 627
 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.
When installing multiple inverters, fully take measures to prevent the surrounding air temperature of the inverter from being
higher than the permissible value by providing ventilation or increasing the enclosure size.
Inverter
(a) Horizontal arrangement
42
2. INSTALLATION AND WIRING
2.3 Installation of the inverter and enclosure design
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FR-F820-03160(75K) or lower,
FR-F840-01800(75K) or lower
or more
Vertical
for fan replacement.
Inverter
Inverter
Guide
Inverter
Enclosure Enclosure
(b) Vertical arrangement
Arrangement of multiple inverters
search engine
Clearances (front)
FR-F820-03800(90K) or higher,
FR-F840-02160(90K) or higher
10 cm
or more
5 cm 5 cm 10 cm
*1,*2 *1,*2
or more or more
10 cm
or more
Inverter
Guide
Guide
Inverter
Clearances (side)
20 cm
or more
5 cm
or more
10 cm
*1,*3
or more
Inverter
20 cm
or more