Hitachi L700 SERIES Quick Reference Manual page 16

Chapter 2 Installation and Wiring
(6) Installation method and position
Install the inverter vertically and securely with screws or bolts on a surface that is free from vibrations
and that can bear the inverter weight.
If the inverter is not installed vertically, its cooling performance may be degraded and tripping or
inverter damage may result.
(7) Mounting in an enclosure
Heat in the inverter rises from the under to the upper part of the inverter up with the fan built into the
inverter, and make it to the one without the obstacle even if the influence of heat is received, please
when you arrange apparatus up.
Moreover, please usually arrange it sideways like the left side of the figure below when you store two or
more inverters in the same enclosure.
The temperature in an upper inverter rises because of the heat of a lower inverter when it places one
behind another unavoidably to reduce the space of the enclosure, it causes the inverter breakdown,
and set it up, please so that the heat of a lower inverter should not influence an upper inverter.
Please note it enough as ventilation, ventilation, and the size of the board are enlarged so that the
ambient temperature of the inverter should not exceed the permissible value when two or more
inverters are stored on the enclosure.
Inverter
(8) When mounting multiple inverters in an enclosure with a ventilation fan, carefully design the layout of
the ventilation fan, air intake port, and inverters.
An inappropriate layout will reduce the inverter-cooling effect and raise the ambient temperature. Plan
the layout so that the inverter ambient temperature will remain within the allowable range.
Inverter
Enclosure
Sideways
Ventilation fan
Inverter
(Acceptable)
Position of ventilation fan
Inverter
Guide
Plate
Inverter
Enclosure
Behind another
Ventilation fan
Inverter
(Unacceptable)
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