Danfoss VLT 28 Manual page 6

I Mechanical installation
The adjustable frequency drive is cooled by air
circulation. For proper cooling, allow a minimum
of 4 inches (100 mm) of open space above and
below the unit. To protect the unit from overheating,
ensure that both the ambient temperature and the
24-hour average temperature are not exceeded.
The maximum temperature and 24-hour average
are listed in General technical data in this manual. If
the ambient temperature is in the range of 113°F -
131°F (45°C - 55°C), derating of the drive must be
carried out. See Derating for ambient temperature
in this manual. The service life of the unit will be
reduced without applicable derating.
The requirements that apply to enclosures
and remote mounting must be complied
with to avoid serious injury or equipment
damage, especially when installing large units.
I Enclosures
In the USA and some other countries, a NEMA 1
terminal cover enclosing terminal connectors is required
if the drive is not installed within another enclosure.
I Spacing for mechanical installation
All units require a minimum of 4 in of air from other
components above and below the enclosure.
MG.28.A8.22 - VLT is a registered Danfoss trademark
VLT® 2800 Series
I Side-by-side
All VLT 2800 units can be installed side-by-side
and in any position, as the units do not require
ventilation on the side.
NOTE
With the IP 21 solution all units require a
minimum of 4 in air on each side. This means
that side-by-side mounting is not allowed.
9