506305-01Page 30 of 36 Issue 0938
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.
Lubrication
The blower motor and induced draft motor are pre-lubricated
by the manufacturer and do not require further lubricating
attention. However, the motors should be cleaned periodically
to prevent the possibility of overheating due to an accumulation
of dust and dirt on the windings or on the motor exterior.
Condensate Collection and Disposal System
Check the condensate drain line periodically for blockage.
Visual inspection of condensate flow can be done easily while
the furnace is in operation. Use a flashlight to illuminate the
discharge end of the condensate drain that is placed in the
sewer opening. If the condensate drain line becomes
blocked or plugged, the furnace will not operate properly.
MAINTENANCE
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.
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.
ELECTRICAL SHOCK, FIRE,
OR EXPLOSION HAZARD
WARNING
Typical Flame Appearance
Figure 39
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