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Manual 2100-353
Page 9
INSTALLATION
LOCATION
GENERAL
The unit must be located outside, or in a well ventilated
area. It must not be in the space being heated or cooled.
A sound absorbing material should be considered if the
unit is to be installed in such a position or location that
might cause transmission of sound or vibration to the
living area or adjacent buildings.
SLAB MOUNTING
In areas where winter temperatures DO NOT go below
32° F for periods over twelve hours, the unit may be
slab mounted at grade level. When installing unit at
grade level, install on a concrete slab at least four
inches above finished grade level. Slab should have a
slope tolerance away from the building structure of at
lease 1/4 inch per foot, while being level from side to
side. Place slab in a location where runoff water from
higher ground will not collect around unit. See
Figure 2.
A minimum of 18 inches should be provided between
the coil inlet and any building surfaces. Provide at least
four feet between coil outlet and any building wall,
fences or other vertical structures. Provide a minimum
of three feet clearance on the service access side of the
unit. See Figure 3.
ROOF MOUNTING
When a unit is installed in areas where low ambient
temperatures or strong winter winds exist, it should be
placed for prevailing winter winds are not in direct line
with the outdoor coil. If this is not possible, a wind
barrier should be constructed. Place barrier 24 inches
from the coil inlet side of the unit and in the direction
of prevailing winds. Size barrier at least the same
height and width as the unit. This may be necessary on
ground level installations, also. See Figure 4.
WINTER INSTALLATION BELOW 32°F
In areas where winter conditions go below 32°F for
extended periods, the unit must be elevated above the
mounting surface to prevent snowfall or ice
accumulation from interfering with the operation of the
unit. A minimum of twelve inch elevation is
recommended, while greater elevation may be required
for areas of high snow accumulation. Poured concrete,
steel framework, brick, cement block, etc., can be
utilized to construct a suitable raised mounting
platform. See Figure 5.
TYPICAL INSTALLATIONS
1.
ROOF MOUNTED
– The unit is mounted on a
sturdy base on the roof of the building. Return air
to the unit is brought through a single return grille
(grilles with built-in filters are best since they
enable easy access for filter changing). Return air
ducts are attached to the lower section of the front
panel. Supply air is brought from the unit to attic
duct work or to a furred down hall. Supply air duct
is attached to the top of the front panel.
CAUTION: All outdoor duct work must be
thoroughly insulated and weatherproofed. All
attic duct work must be thoroughly insulated.
Two inch thick insulation with suitable vapor
barrier is recommended for both outdoor and
attic runs.
In roof top installation, as in all installations, the air
conditioner must be level from side to side.
However, the unit should have a pitch along the
length to assure complete external drainage of
precipitation and of defrost condensate. See Figures
6 and 7, and Tables 6 and 7.
2.
CRAWL SPACE
– Duct work installed in crawl
space must be well insulated and provided with a
vapor barrier. In addition, the crawl space must be
thoroughly ventilated and provided with a good
vapor barrier as a ground cover. It is most desirable
to install the unit will be outdoors rather than inside
the crawl space, so that it will be readily accessible
for service.
3.
SLAB MOUNTED AT GROUND LEVEL
– This
type installation is ideal for homes with a slab floor
construction where a roof mounted unit is not
desired. The supply and return duct work can be run
through a furred closet space.
4.
THROUGH THE WALL
– This type installation
requires a suitable framework to be fabricated
capable of withstanding the unit weight. Normally
the unit will be insulated so as to minimize supply
and return duct work.