Venting
A 4−inch diameter flue transition is
Mounting Screws Location |
Mounting Screws |
FIGURE 15
UPFlow Position
UPFLOW POSITION | |
Top Vent Discharge | |
Vent Pipe | |
Flue | Collector Box |
Transition |
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Pressure |
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Switch |
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Make−Up |
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Box |
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AIR | FLOW |
FIGURE 16
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 clock- wise 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, pres- sure switch and or make up box as needed per the follow- ing steps and see figures 17 through 22.
1 − Remove the four mounting screws which secure the combustion air inducer / pressure switch assembly to the orifice plate. See figure 15. Lift and rotate the as- sembly 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 − 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.
UPFLOW POSITION
Left Side Vent Discharge
Cover Plate |
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Pressure
Switch
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Vent Pipe | Box |
Flue
Transition
AIR 
FLOW
SGas supply piping must be brought into the unit from the right side in order to accommodate the flue pipe.
SRemove 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.
SRe−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.
FIGURE 17
UPFLOW POSITION
Right Side Vent Discharge
Cover Plate
Pressure | Flue Transition | |
Vent Pipe | ||
Switch | ||
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Collector |
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Box |
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Make−Up |
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Box |
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AIR 
FLOW
SPressure 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.
FIGURE 18
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