When mounting two or more inverters
Horizontal layout is recommended when two or more
inverters are to be installed in the same unit or panel. If it is
necessary to mount the inverters vertically, install a partition
plate or the like between the inverters so that any heat
radiating from an inverter will not affect the one/s above. As
long as the ambient temperature is 40°C (104qF) or lower,
inverters can be mounted side-by-side without any gap
between them (only for inverters with a capacity of less than
7.5 HP).
When employing external cooling
At the shipment time, the inverter is set up for mount inside
your equipment or panel so that cooling is done all internally.
To improve cooling efficiently, you can take the heat sink out
of the equipment or the panel (as shown on the right) so that
cooling is done both internally and externally (this is called
"external cooling").
In external cooling, the heat sink, which dissipates about
70% of the total heat (total loss) generated into air, is situated
outside the equipment or the panel. As a result, much less
heat is radiated inside the equipment or the panel.
To take advantage of external cooling, you need to use the
external cooling attachment option for inverters with a
capacity of 7.5 HP or above.
In an environment with high humidity or a lot of fibrous dust,
however, do not use external cooling in an environment with
high humidity or a lot of fibrous dust, which tends to clog the
heat sink.
For details, refer to the Mounting Adapter for
External Cooling "PB-F1/E1" Installation Manual.
50°C
(122°F)"
Figure 2.2 External Cooling
Prevent lint, paper fibers, sawdust, dust, metallic chips, or other foreign materials from getting
into the inverter or from accumulating on the heat sink.
This may result in a fire or accident.
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