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The ame sensor is a probe mounted to the burner/
manifold assembly which uses the principle of ame
rectication to determine the presence or absence of
ame.
The furnace should be inspected by a qualied installer, or
service agency at least once per year. This check should
be performed at the beginning of the heating season.
This will ensure that all furnace components are in proper
working order and that the heating system functions
appropriately. Pay particular attention to the following
items. Repair or service as necessary.
• Flue pipe system. Check for blockage and/or leakage.
Check the outside termination and the connections at
and internal to the furnace.
• Heat exchanger. Check for corrosion and/or buildup
within the heat exchanger passageways.
• Burners. Check for proper ignition, burner ame, and
ame sense.
• Drainage system. Check for blockage and/or leakage.
Check hose connections at and internal to furnace.
• Wiring. Check electrical connections for tightness
and/or corrosion. Check wires for damage.
• Filters.
Improper lter maintenance is the most common cause of
inadequate heating or cooling performance. Filters should
be cleaned (permanent) or replaced (disposable) every
two months or as required. When replacing a lter, it must
be replaced with a lter of the same type and size.
Depending on the installation, diering lter arrangements
can be applied. Filters can be installed in either the central
return register or a side panel external lter rack (upow
only). A media air lter or electronic air cleaner can be
used as an alternate lter. Follow the lter sizes given in
the Recommended Minimum Filter size table to ensure
proper unit performance.
To remove lters from an external lter rack in an upright
upow installation, follow the directions provided with
external lter rack kit.
Filters in horizontal installations are located in the central
return register or the ductwork near the furnace.
To remove:
1. Turn OFF electrical power to furnace.
2. Remove lter(s) from the central return register or
ductwork.
3. Replace lter(s) by reversing the procedure for
removal.
4. Turn ON electrical power to furnace.
Follow the manufacturer’s directions for service.
Visually inspect the burner ames periodically during the
heating season. Turn on the furnace at the thermostat
and allow several minutes for ames to stabilize, since any
dislodged dust will alter the ames normal appearance.
Flames should be stable, quiet, soft, and blue (dust may
cause orange tips but they must not be yellow). They
should extend directly outward from the burners without
curling, oating, or lifting o. Flames must not impinge on
the sides of the heat exchanger ring tubes.
The bearings in the induced draft blower and circulator
blower motors are permanently lubricated by the
manufacturer. No further lubrication is required. Check
motor windings for accumulation of dust which may cause
overheating. Clean as necessary.
Annually inspect the drain tubes, drain trap, and eld-
supplied drain line for proper condensate drainage. Check
drain system for hose connection tightness, blockage, and
leaks. Clean or repair as necessary.
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