Lennox EL280UHE Series Service Literature page 24

Multiple Venting
The EL280UHE(X) furnace can vent in multiple positions.
See figure 17.
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
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.
FLOW
AIR
Vent Pipe
AIR
FLOW
screws, rotate the combustion air inducer and gasket
(pressure switch should be above the combustion air in-
ducer in all positions), then reinstall the mounting screws.
See unit Installation Instructions for more detail.
The combustion air pressure switch must be moved
for horizontal discharge air left position.
Vent Pipe
vent pipe
vent pipe
FIGURE 17
Page 24
IMPORTANT
AIR
FLOW