Manual 2100-324
Page
6
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 3.
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 4
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 5.
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 6.
DUCT WORK
Refer to Tables 4, 5 and 5A when designing duct work for
maximum static pressure available with the specific model
and heater package being installed.
TABLE 5A
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.
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.
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TABLE 5
RATED CFM AND
EXTERNAL STATIC PRESSURE (ESP)
WET COIL (COOLING)
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Summary of Contents for P1060A1
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