Mitsubishi FR-A800

Installation of the inverter and enclosure design
INSTALLATION AND WIRING
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2
2.3.3 Inverter installation
Inverter placement
• Install the inverter on a strong surface securely with screws.
• Leave enough clearances and take cooling measures.
• Avoid places where the inverter is subjected to direct sunlight, high temperature and high humidity.
• Install the inverter on a nonflammable wall surface.
• When encasing multiple inverters, install them in parallel as a cooling measure.
• 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.
 For the FR-A820-00250(3.7K) or lower and FR-A840-00126(3.7K) or lower, allow 1 cm (0.39 inches) 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 (104°F) or less
(30°C (86°F) 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 (11.81 inches) of space is necessary in front of the inverter. Refer to
page 679 for 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.
Fix six positions for the FR-A840-04320(160K) or higher.
Clearances (side)
Inverter
Clearances (front)
10cm
(3.94inches)
or more
10cm
(3.94inches)
or more
10cm
(3.94inches)
or more
10cm
(3.94inches)
or more
20cm
(7.87inches)
or more
20cm
(7.87inches)
or more
5cm
(1.97inches)
or more∗1,∗2
5cm
(1.97inches)
or more∗1,∗2
FR-A820-03160(55K) or lower,
FR-A840-01800(55K) or lower
FR-A820-03800(75K) or higher,
FR-A840-02160(75K) or higher
Vertical
5cm
(1.97
inches)
or more
∗1,∗3
Allow clearance.