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(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, ND*, HD)
-10°C to 40°C (14°F to 104°F)
(SLD)
* Initial setting
Ambient humidity: 90% RH maximum
Leave enough clearances and take
cooling measures.
REMARKS
For replacing the cooling fan of the FR-A740-03250 or more, 30cm (11.8inches) of space is necessary in front of the inverter.
Refer to page 439 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-A720-02150 or less
FR-A720-02800 or more
FR-A740-01100 or less
FR-A740-01440 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-A720-00175
(FR-A740-00090) or less
Inverter
(a) Horizontal arrangement
Installation of the inverter and enclosure
(front)
20cm (7.87inches)
or more
10cm
(3.94inches)
or more
20cm (7.87inches)
or more
Inverter
Inverter
Guide
Inverter
Enclosure
Enclosure
(b) Vertical arrangement
Arrangement of multiple inverters
Inverter
Placement of ventilation fan and inverter
design
Clearances (side)
5cm
(1.97inches)
Inverter
or more
*
Inverter
Guide
Guide
Inverter
Inverter
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