Lennox 80G2UH-V Installation Instructions Manual page 13

Warm air gas furnace upflow/horizontal left/right air discharge
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• Remove make-up box assembly (2 screws) and cut wire tie to
free make-up box wires. Reinstall make-up box on other side of
cabinet.
• Resecure make-up box wires: Either pull excess wires through
the blower compartment and secure using supplied wire tie, or
coil excess wire and secure to the gas manifold.
Figure 17. Upflow Position
Left Side Vent Discharge
• Pressure switch tubing may be too long. Cut to fit, then reattach
to barbed fitting on pressure switch. Tubing must not be allowed
to sag.
Figure 18. Upflow Position
Right Side Vent Discharge
507335-03
• Disconnect pressure switch hose from barbed fitting on the
pressure switch assembly. Remove pressure switch assembly
(1 screw) and cut wire tie to free pressure switch wires. Reinstall
pressure switch on the other side of orifice plate and reconnect
pressure switch hose.
• Resecure pressure switch wires: Either pull excess wires
through the blower compartment and secure using supplied
wire tie, or coil excess wire and secure to the gas manifold.
Figure 19. Horizontal Left Position
• Disconnect pressure switch hose from barbed fitting on the
pressure switch assembly. Remove pressure switch assembly
(1 screw) and cut wire tie to free pressure switch wires. Reinstall
pressure switch on the other side of orifice plate and reconnect
pressure switch hose.
• Resecure pressure switch wires: Either pull excess wires
through the blower compartment and secure using supplied
wire tie, or coil excess wire and secure to the gas manifold.
Figure 20. Horizontal Left Position
Issue 2302
Top Vent Discharge
Side Vent Discharge
Page 13 of 39

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