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Table 2-1: Unit Clearance
Direction
Distance (in.)
Direction
Top
60
Right
1
Front
30
Rear
18
Bottom
2
Duct clearance: 1 inch clearance for all sides of air
supply duct.
1. Units must be installed outdoors. Over hanging
structure or shrubs should not obscure condenser air
discharge outlet.
2. The minimum clearance without economizer/fresh air
damper. For distance with economicer/fresh air damper,
please refer to the installation instructions provided with
the accessory.
3. Units may be installed on combustible floors made
from wood or class A, B or C roof covering materials.
NOTE
For units applied with a roof curb, the minimum
clearance may be reduced from 1 inch to 1/2 inch
between combustible roof curb material and this
supply air duct.
NOTE
A unit with electric heaters with an inlet or outlet
duct that penetrates the building structure
supporting the unit shall be provided with a
mounting base of noncombustible material so
designed that, after the unit is installed, there will
be no open passages through the supporting
structure that would permit flame or hot gases
from a fire originating in the space below the
supporting structure to travel to the space above
that structure. If the unit is intended to be
installed on a supporting structure of combustible
material, the base shall be so designed that the
required clearance will be maintained between
the supporting structure and the unit, plenum,
and attached duct. Spacers necessary to provide
required clearances shall be attached to the unit
mounting base, and shall extend not less than 76
mm (3 in.) below the upper surface of the
supporting structure, except that, in a unit
designed for use only in a mobile home, the
distance shall be not less than 19 mm (3/4 in.).
3 DUCTWORK
Ductwork should be sized and installed by the installing
contractor in accordance with the Manual D from the Air
Conditioning Contractors of America, and all national,
state and local codes.
NOTE
On ductwork exposed to outside air space, use at
least 2" of insulation and a vapor barrier. Flexible
joint may be used to reduce noise.
Distance (in.)
30
Left
24
0
3
08
A closed return duct system shall be used. This shall not
preclude use of economizers or ventilation air intake.
Flexible joints may be used in the supply and return duct
work to minimize the transmission of noise.
CAUTION
When fastening duct work to the side duct
flanges on the unit, insert the screws through the
duct flanges only. DO NOT insert the screws
through the casing. Outdoor duct work must be
insulated and waterproofed.
NOTE
Be sure to note supply and return openings.
Refer to Fig. 2-3 and 2-5 for information
concerning supply and return air duct openings.
4 CONDENSATE DRAIN
CONNECTION
Consult local codes for special requirements.
To provide extra protection from water damage, install
an additional drain pan, provided by installer, under the
entire unit with a separate drain line.
Manufacturer will not be responsible for any damages
due to the failure to follow these requirements.
4.1 Install Drain Pipe
1. Use the provided female NPT threaded fitting for
outside connection and make sure that drain holes are
not blocked.
2. Insulation may be needed for drain line to prevent
sweating.
3. Drain pan has two drain connections on each side to
provide flexibility of connection and drainage. Make
sure proper pitch and plugging if second connection is
not used.
4. Use a sealing compound on male pipe threads. Install
the condensate drain line (NPT) to spill into an open
drain.
5.Ensure a trap is included in the condensate drain line.
5 FILTERS
Units are shipped without a filter or filter racks. It is the
responsibility of the installer to secure a filter in the return
air ductwork or install a filter/frame Kit.
Filter must always be used and must be kept clean. Dirty
filters may cause insufficient air delivery, decreasing unit
efficiency and increasing operation costs and wear-and
tear on the unit and controls.
Filters should be checked monthly; this is especially
important since this unit is used for both heating and
cooling.
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