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• Inspect, clean or replace air filters at the beginning of each
heating and cooling season, or more frequently if required.
Refer to
Table 1 (page 8)
filter sizes
• Inspect the condensate drain and outdoor coil at the
beginning of each cooling season. Remove any debris.
Clean the outdoor coil and louvers as necessary using a
mild detergent and water. Rinse thoroughly with water.
• Inspect the electrical connections for tightness at the
beginning of each heating and cooling season.
• The blower compartment should be cleaned monthly during
the heating and cooling seasons to remove any dirt and lint
that may have accumulated in the compartment or on the
blower and motor. Buildup of dirt and lint on the blower and
motor can create excessive loads on the motor resulting in
higher than normal operating temperatures and possible
shortened service life.
• Maintain heat exchanger and burners. The unit should
operate for many years without excessive scale buildup in
the heat exchanger, however, the heat exchanger, the vent
system, and the burners should be inspected and cleaned
(if required) by a qualified Technician annually to ensure
continued safe operation. Particular attention must be given
to identify deterioration from corrosion or other sources.
• The motors for the circulating air blower, outdoor fan, and
combustion blower are pre-lubricated at the factory. No
further oiling is required for the life of this product.
• Inspect and clean the screen of the vent cover assembly
at the beginning of each heating and cooling season.
Heat Exchanger & Burner Maintenance - The furnace
should operate for many years without soot buildup in the
flue passageways, however, the flue and vent system 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.
Cleaning of Flame Sensor - If the flame sensor is suspect
for Loss of Flame fault code, the sensor can be cleaned to
see if that remedies the issue. Follow steps 1 - 10. See
14 (page 26)
for component location.
CAUTION:
Due to igniter/flame sensor assembly location, a
new gasket should be on hand before servicing this
part. One new gasket is provided in the furnace extra
parts package. Failure to re-seal the assembly after
service can result in abnormal furnace operation.
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
its lowest setting.
3. Remove the louvered door from the unit.
4. Turn the gas control switch to the OFF position.
5. Remove the 2 screws securing the combustion air orifice
plate to the air/fuel mixing tube (if needed to access the
ignitor/flame sensor assembly cover on smaller models).
6. Remove 8 screws from perimeter of access cover plate.
16
for recommended external
Figure
7. Lift the assembly and bracket straight up out of the burner box
and off the HX panel. NOTE: Use of a flat blade screwdriver
between assembly bracket and top of burner mounting
bracket to help leverage bracket off may be required. See
Figure
9.
8. Clean the flame sensor using steel wool being careful not
to damage the igniter.
9. Replace old gasket with new gasket ensuring correct
orientation, with adhesive side to the bracket.
10. Replace igniter/flame sense assembly in reverse order
they were removed.
Vent System - Check the vent pipe and/or chimney for
corrosion or debris. Any corroded section of vent pipe must be
replaced, and any obstruction or blockage must be removed
prior to operating the furnace.
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.
Figure 9. Ignitor Flame Sensor Bracket
Access Cover
Perimeter
Screws (x8)
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