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Horizontal Application
Unit Installed on Platform
Line contact is permissible
See the unit nameplate for
clearances.
GAS
ENTRY
SERVICE PLATFORM
FIGURE 13
WARNING
Improper installation of the furnace can result in
personal injury or death. Combustion and flue
products must never be allowed to enter the return
air system or the living space. Use screws and joint
tape to seal the return air system to the furnace.
In platform installations with bottom return air, the
furnace should be sealed airtight to the return air
plenum. A door must never be used as a portion of
the return air duct system. The base must provide
a stable support and an airtight seal to the furnace.
Allow absolutely no sagging, cracks, gaps, etc.
The return and supply air duct systems must never
be connected to or from other heating devices
such as a fireplace or stove, etc. Fire, explosion,
carbon monoxide poisoning, personal injury and/or
property damage could result.
The blower access panel must be securely in place
when the blower and burners are operating. Gas
fumes, which could contain carbon monoxide, can
be drawn into living space resulting in personal
injury or death.
Filters
VENT
PIPE
This unit is not equipped with a filter or rack. A field-pro-
vided high-velocity filter is required for the unit to operate
properly. "TABLE 1" lists recommended filter sizes.
If a highefficiency filter is being installed as part
of this system to ensure better indoor air quality,
the filter must be properly sized. Highefficiency
filters have a higher static pressure drop than
standardefficiency glass/foam filters. If the pressure
drop is too great, system capacity and performance
may be reduced. The pressure drop may also cause
the limit to trip more frequently during the winter and
the indoor coil to freeze in the summer, resulting in
an increase in the number of service calls.
Before using any filter with this system, check the
specifications provided by the filter manufacturer
against the data given in the appropriate Lennox
Product
information is provided in Service and Application
Note ACC002 (August 2000).
FurnaceCabinet
Width
A - 14-1/2"
B - 17-1/2"
C - 21"
Page 11
WARNING
IMPORTANT
Specifications
bulletin.
TABLE 1
Filter Size
Side Return
16 X 25 X 1 (1)
16 X 25 X 1 (1)
16 X 25 X 1 (1)
Additional
Bottom Return
14 X 25 X 1 (1)
16 X 25 X 1 (1)
20 X 25 X 1 (1)
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