Mitsubishi Electric FR-F720-00046 Instruction Manual page 20

(2) Clearances around the inverter
To ensure ease of heat dissipation and maintenance, leave at least the shown clearances around the inverter. At least the
following clearances are required under the inverter as a wiring space, and above the inverter as a heat dissipation space.
Surrounding air temperature and humidity
Measurement
position
Inverter
5cm 5cm
(1.97inches) (1.97inches)
5cm
Measurement
(1.97inches)
position
Temperature: -10°C to 50°C (14°F to 122°F)
(LD)
-10°C to 40°C (14°F to 104°F)
(SLD)
Humidity: 90% RH maximum
Leave enough clearances as a
cooling measure.
REMARKS
• For replacing the cooling fan of the FR-F740-04320 or more, 30cm(11.8 inches) of space is necessary in front of
the inverter. Refer to page 298 for fan replacement.
(3) Inverter mounting orientation
Mount the inverter on a wall as specified. Do not mount it horizontally or any other way.
(4) 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.
(5) 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.
(6) Placement of 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.)
Clearances
FR-F720-02330 or less FR-F720-03160 or more
FR-F740-01160 or less FR-F740-01800 or more
10cm (3.94inches)
or more
5cm 5cm
10cm
(1.97inches) (1.97inches)
(3.94inches)
or more * or more *
or more
10cm (3.94inches)
or more
* 1cm (0.39 inches) or more for FR-F720-00167, FR-740-
00083 or less
Inverter
(a) Horizontal arrangement
Installation of the inverter and
(front)
20cm (7.87inches)
or more
10cm
(3.94inches)
or more
20cm (7.87inches)
or more
* 1cm (0.39 inches) or more for FR-
F720-00167, FR-740-00083 or less
Inverter
Inverter
Guide
Inverter
Enclosure Enclosure
(b) Vertical arrangement
Arrangement of multiple inverters
Inverter
<Good example>
Placement of ventilation fan and inverter
enclosure design
Clearances (side)
5cm
(1.97inches)
Inverter
or more
*
Inverter
Guide
Guide
Inverter
Inverter
<Bad example>
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