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• To achieve the best performance and minimize
equipment failure it is recommended that a yearly
maintenance checkup be performed. At a minimum,
this check should include the following items:
Air Filter(s)
WARNING:
Never operate the furnace without a filter in
place. Dust and lint can build up on internal
components, resulting in loss of efficiency,
equipment damage, and possible fire.
An air filter is supplied with the furnace as shipped from
the factory. Filters should be changed or cleaned monthly
during the heating season. Newly built or renovated homes
may require more frequent changing until the construction
dust has minimized.
Filters designed to remove smaller particles such as
pollen, may require additional maintenance.
Blower Compartment
Dirt and lint can create excessive loads on the motor
resulting in higher than normal operating temperatures
and shortened service life. It is recommended that the
blower compartment be cleaned of dirt or lint that may
have accumulated in the compartment or on the blower
and motor as part of the annual inspection.
Cleaning of Burners
If the burners must be cleaned, follow steps 1-12. See
Figure 17 (page 27) for component location.
1. Shut off gas supply to the furnace at the meter or at a
manual valve in the supply piping.
2. Turn off all power to the furnace and set the thermostat
to it’s lowest setting.
3. Turn the gas control knob to the OFF position. See
Figure 13 (page 18).
4. Disconnect the wires from the gas valve, igniter, flame
sensor, and flame rollout switch.
CAUTION:
To prevent damage to the unit or internal
components, it is recommended that two
wrenches be used when loosening or tightening
nuts. Do not over tighten!
5. Using two wrenches, separate the ground-joint union
in the gas supply piping at the furnace.
6. Remove the piping between the gas valve and the
ground-joint union. (If applicable).
7. Remove the burner box door (6 screws).
8. Remove 4 screws securing the manifold assembly to
the burner box.
9. Remove 4 screws from the corners of the box and
carefully remove the burner assembly from the furnace.
IMPORTANT: DO NOT damage the igniter while
removing the burner assembly.
10. Inspect the burners for accumulated dust or debris.
If necessary carefully clean them with a soft wire
brush and a vacuum cleaner.
IMPORTANT:
DO NOT
damage the igniter while cleaning the burner
assembly.
11. Replace all the parts in reverse order that they were
removed.
12. Follow the lighting instructions found on the furnace
door to return the furnace to operation. Verify proper
operation after servicing.
Vent System
WARNING:
Holes in the vent pipe or heat exchanger can
cause combustion products to enter the home.
Replace the vent pipe or heat exchanger if leaks
are found. Failure to prevent the circulation
of combustion products into the living space
can create potentially hazardous conditions
including carbon monoxide poisoning that
could result in personal injury or death.
Check the inlet pipe (if applicable) and outlet pipe to ensure
they are not blocked by debris. Any damaged section
of vent pipe must be replaced, and any obstruction or
blockage must be removed prior to operating the furnace.
Heat Exchanger & Burner Maintenance
The furnace should operate for many years without soot
buildup in the flue passageways, however, the flue, vent
system, and burners should be inspected and cleaned
(if required) by a qualified service technician annually to
ensure continued safe operation. Pay attention to any
deterioration from corrosion or other sources.
Lubrication
The bearings in the blower motor and inducer blower used
in these furnaces are pre-lubricated and sealed by the
manufacturer. No further oiling of the bearings is required
for the life of the motor.
