507713-01
Page 12 of 32
Issue 1623
Venting
A 4 inch diameter flue transition is factory installed on the
combustion air inducer outlet of all models.
Figure 16 shows
the combustion air inducer as shipped from the factory.
The unit will not vent properly with the flue transition
pointed down in the 6 o’clock position.
IMPORTANT
1. Remove the four mounting screws (Figure 15) which
secure the combustion air inducer / pressure switch
assembly to the orifice plate. Lift the assembly and rotate
it 90° clockwise or counter clockwise to either the 3 o’clock
position. Resecure with four secrews. Gasket should be left
in place.
2. Use tin snips to cut preferred opening on the cabinet
for repositioning the flue outlet. Use the cut-out piece as a
cover plate to patch unused opening on cabinet.
Figure 18
UPFLOW POSITION
Right Side Vent Discharge
•
Cut combustion air inducer tubing from 9” to 5” to avoid interference with
inducer motor.
Mounting Screws Location
Figure 15
Figure 16
UPFLOW POSITION
Top Vent Discharge
The combustion air inducer may be rotated clockwise
or counterclockwise by 90° to allow for top or side vent
discharge in all applications. When the unit is installed,
the flue transition must be in the 9 o’clock, 12 o’clock
or 3 o’clock position.
If necessary reposition the combustion air inducer, pressure
switch and/or make-up box as needed per the following
steps. See Figures 16 through 22.
Figure 17
•
Gas supply piping must be brought into the unit from the right side in
order to accommodate the flue pipe.
•
Cut combustion air inducer tubing from 9” to 8” to avoid interference with
inducer motor.
•
Remove make-up box assembly (2 screws) and cut wire tie to free make-
up box wires. Re install make-up box on other side of cabinet.
•
Resecure make-up box wires: Either pull excess wires through the blower
companrtment and secure using supplied wire tie, or coil excess wire and
secure to the gas manifold.
UPFLOW POSITION
Left Side Vent Discharge
