# 45465K005
Page 25
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.
MAINTENANCE
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.
WARNING
ELECTRICAL SHOCK, FIRE,
OR EXPLOSION HAZARD
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 overheat-
ing due to an accumulation of dust and dirt on the wind-
ings or on the motor exterior.
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 28 to deter-
mine 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
Typical Flame Appearance
Figure 28
Heat
Exchanger
Burner
Flame
(Blue Only)
Burner
Gas
Manifold
