Page 13
5 - If necessary, run the condensate line into a condensate
pump to meet drain line slope requirements. The
pump must be rated for use with condensing
furnaces. Protect the condensate discharge line
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6 - Continue with exhaust, condensate and intake piping
installation according to instructions.
*Gas connector may be
used for Canadian
able by local authority
having jurisdiction.
*GAS CONNECTION
RAISED
PLATFORM
SERVICE PLATFORM
INTAKE PIPE
EXHAUST PIPE
Figure 19
Return Air -- Horizontal Applications
Return air may be brought in only through the end of a
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equipped with a removable bottom panel to faciliate instal-
lation. See Figure 15.
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.
WARNING
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V\VWHPWRHQVXUHEHWWHULQGRRUDLUTXDOLW\WKH¿OWHUPXVW
EH SURSHUO\ VL]HG +LJKHႈFLHQF\ ¿OWHUV KDYH D KLJKHU
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and performance may be reduced. The pressure drop
may also cause the limit to trip more frequently during
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resulting in an increase in the number of service calls.
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the data given in the appropriate Lennox Product
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in Service and Application Note ACC002
(August 2000).
TABLE 1
Furnace
Cabinet Width
)LOWHU6L]H
Side Return Bottom Return
17-1/2” 16 X 25 X 1 (1) 16 X 25 X 1 (1)
21” 16 X 25 X 1 (1) 20 X 25 X 1 (1)
Duct System
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supply and return air duct system. Figure 20 shows the
correct supply and return duct installation. Refer to ACCA
Manual D. This will result in a quiet and low-static system
that has uniform air distribution.
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LQJ PRGH LQGRRU EORZHU RSHUDWLQJ DW VHOHFWHG KHDWLQJ
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Supply Air Plenum
If the furnace is installed without a cooling coil, a remov-
able access panel should be installed in the supply air
duct. The access panel should be large enough to per-
mit inspection of the heat exchanger. The furnace access
panel must always be in place when the furnace is oper-
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stall self tapping screws in the three evaporator coil screw
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to the vestibule panel.
Return Air Plenum
NOTE - Return air must not be drawn from a room
where this furnace, or any other gas-fueled appliance
(i.e., water heater), or carbon monoxide-producing de-
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When return air is drawn from a room, a negative pressure
is created in the room. If a gas appliance is operating in
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pulled back down the vent pipe and into the room. This
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bustion and the formation of carbon monoxide gas. This
raw gas or toxic fumes might then be distributed through-
out the house by the furnace duct system.
Return air can be brought in through the bottom or either
side of the furnace (return air brought into either side of
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with bottom return air is installed on a platform, make an
airtight seal between the bottom of the furnace and the
platform to ensure that the unit operates properly and
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lent sealing method between the plenum and the furnace
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UHWXUQDLUGXFWWR¿WWKH¿OWHUIUDPH
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