MAINTENANCE
WARNING
ELECTRICAL SHOCK, FIRE,
OR EXPLOSION HAZARD
Failure to follow the safety warnings exactly could result in dangerous operation, serious injury, death, or property damage.
Improper servicing could result in dangerous operation, serious injury, death, or property damage.
•Before servicing, disconnect all electrical power to furnace.
•When servicing controls, label all wires prior to disconnecting. Reconnect wires correctly.
•Verify proper operation after servicing.
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. Disposable filters should be replaced when dirty, and cleanable 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.
Burners
Light the burners and allow to operate for a few minutes to establish normal burning conditions. Observe the burner flames. Compare this observation to Figure 39 to determine if proper flame adjustment is present. Flame should be predominantly blue in color and strong in appearance. 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 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 burner orifice.
Use a soft brush or vacuum to clean the affected areas.
Typical Flame Appearance
Heat
Exchanger
Burner
Gas | Burner |
Manifold | Flame |
| (Blue Only) |
Figure 39
Lubrication
The blower motor and induced draft motor are
Issue 1034 | Page 35 of 41 |
