Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual page 44

Fr-a800 series

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Allow clearance.

For the FR-A820-00250(3.7K) or lower and FR-A840-00126(3.7K) or lower, allow 1 cm or more clearance.

When using the FR-A820-01250(22K) or lower and FR-A840-00620(22K) or lower at the surrounding air temperature of 40°C or less (30°C or

less for the SLD rated inverter), side-by-side installation (0 cm clearance) is available.

For replacing the cooling fan of the FR-A840-04320(160K) or higher, 30 cm of space is necessary in front of the inverter. Refer to

fan replacement.

 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 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.

(a) Horizontal arrangement

Arrangement of multiple inverters

FR-A820-03160(55K) or lower,

FR-A840-01800(55K) or lower

(b) Vertical arrangement

Clearances (front)

FR-A820-03800(75K) or higher,

FR-A840-02160(75K) or higher

2.3 Installation of the inverter and enclosure design

Clearances (side)

2. INSTALLATION AND WIRING

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