Lennox iComfort SL280UH070V36A Manual page 42

Multiple Venting
The SL280UHV(X) furnace can vent in multiple positions.
See figure 16.
The make up box may be removed and the combustion air
inducer may be rotated clockwise or counterclockwise 90°
to allow for vertical or horizontal vent discharge in a vertical
or horizontal cabinet position. Remove the four mounting
vent pipe
vent pipe
flue
transition
AIR
In all positions route the wires away from moving parts and the heat of the inducer
motor to prevent damage to the wires. The pressure switch must be installed above
the CAI to prevent moisture from collecting in the hoses or switch.
vent pipe
FLOW
vent pipe
flue transition
AIR
FLOW
FIGURE 16
screws, rotate the assembly (assembly consists of orifice
plate, proving switch, gasket and combustion air inducer),
then reinstall the mounting screws. See unit Installation In­
structions for more detail.
IMPORTANT
The combustion air pressure switch must be moved
for horizontal discharge air left position.
vent pipe
flue
transition
vent pipe
pressure switch
vent pipe
Page 42
AIR
FLOW