Lennox G1N80BU User Manual

# 45464K003 Page 17
Table 3
Manifold Pressure vs. Altitude
(G1N80BU150 and CG80UB150 only)
* Consult local utility for actual heating value.
Furnace Input = Input Factor x 148,000
Above 7500 feet, call Technical Services at 1-800-448-
5872 ext. 2610.
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0003 419 14.3 6912 00.01 9949.0
000418814.3611200.012339.0
0054 568 14.3 7702 00.01 9429.0
000594802.3930214.90098.0
0055 338 81.3 0002 53.9 0978.0
000681861.3469192.90868.0
0056 208 41.3 7291 42.9 0758.0
000778721.3198181.90648.0
0057 177 11.3 3581 21.9 0538.0
It is recommended that this furnace be inspected by a
qualified service technician at the beginning of each heating
season.
Filters
Filters should be checked at least every 6 weeks. Dispos-
able filters should be replaced when dirty, and permanent
filters should be cleaned regularly. It is important to keep the
air filters clean, as dirty filters can restrict airflow and the
blower and induced draft motors depend upon sufficient air
flowing across and through them to keep from overheating.
Main Burners
Light the burners and allow to operate for a few minutes to
establish normal burning conditions. Observe the main
burner flames. Compare this observation to Figure 17 to
determine if proper flame adjustment is present. Flame
should be predominantly blue in color and strong in appear-
ance. Check that all burners are lit, and that the flame does
not impinge on the sides of the heat exchanger.
Distorted flame or yellow tipping of the natural gas main
burner flame, or long yellow tips on propane, may be
caused by lint accumulation or dirt inside the burner or
burner ports, at the air inlet between the burner and
manifold pipe, or obstructions over the main burner orifice.
Use a soft brush or vacuum to clean the affected areas.
Lubrication
The blower motor and induced draft motor are pre-lubri-
cated by the manufacturer and do not require further
lubricating attention. However, the motors should be
cleaned periodically to prevent the possibility of overheat-
ing due to an accumulation of dust and dirt on the windings
or on the motor exterior.
Typical Flame Appearance
(Main Burners)
Figure 17
Heat
Exchanger
Burner
Flame
(Blue Only)
Burner
Gas
Manifold
Table 2
Manifold Pressure vs. Altitude
* Consult local utility for actual heating value.
Furnace Input = Input Factor x Nameplate Input
Above 7500 feet, call Technical Services at 1-800-448-
5872 ext. 2610.
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0054 568 05.3 7702 00.01 9429.0
000594892.3930214.90098.0
0055 338 72.3 0002 53.9 0978.0
000681852.3469192.90868.0
0056 208 32.3 7291 42.9 0758.0
000778712.3198181.90648.0
0057 177 91.3 3581 21.9 0538.0

Lennox G1N80BU Specifications

General

Brand	Lennox
Model	G1N80BU
Category	Furnace
Language	English