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Venting
A 4-inch diameter flue transition is factory-installed on
the combustion air inducer outlet of all models. Figure 15
shows the combustion air inducer as shipped from the fac-
tory.
Mounting Screws Location
FIGURE 14
UPFLOW POSITION
Top Vent Discharge
Flue
Transition
Pressure
Switch
Make -Up
Box
FIGURE 15
IMPORTANT
The unit will not vent properly with the flue transition
pointed down in the 6 o'clock position. 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.
Mounting Screws
Vent Pipe
Collector Box
FLOW
AIR
If necessary reposition the combustion air inducer, pres-
sure switch and or make up box as needed per the follow-
ing steps and see figures 16 through 21.
1 - Remove the four mounting screws which secure the
combustion air inducer / pressure switch assembly
to the orifice plate. See figure 14. Lift and rotate
the assembly 90 degrees clockwise or counter
clockwise to either the 3 o'clock position or to 9
o'clock position and re-secure with four screws.
Gasket should be left in place.
2 - 2 -
Use tin snips to cut preferred opening
on the cabinet for repositioning the flue
outlet. Use the cut out piece
C
o
v
r e
P
a l
e t
Pressure
Switch
Vent Pipe
Flue
Transition
Gas supply piping must be brought into the unit from the right
side in order to accommodate the flue pipe.
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.
Re-secure make-up box wires, either pulling excess wires
through the blower compartment and securing with supplied
wire tie, or coil excess wire and secure to the gas manifold.
Right Side Vent Discharge
Pressure
Switch
Collector
Box
Make-Up
Box
FLOW
AIR
Pressure switch tubing may be too long. Cut to
fit , then re-attach to barbed fitting on pressure
switch. Tubing must not be allowed to sag.
Page 13
UPFLOW POSITION
Left Side Vent Discharge
C
o
FIGURE 16
UPFLOW POSITION
Cover Plate
Flue Transition
FIGURE 17
e l l
t c
r o
B
o
x
Make-Up
Box
FLOW
AIR
Vent Pipe
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