Service Manual

55
MAINTENANCE
WARNING
HIGH VOLTAGE
D
ISCONNECT ALL POWER BEFORE SERVICING OR
INSTALLING THIS UNIT.
MULTIPLE POWER SOURCES MAY
BE PRESENT.
FAILURE TO DO SO MAY CAUSE PROPERTY
DAMAGE, PERSONAL INJURY OR DEATH.
IF YOU MUST HANDLE THE ITNITOR, HANDLE WITH CARE. TOUCHING
THE IGNITOR BODY WITH BARE FINGERS, ROUGH HANDLING, OR
VIBRATION COULD RESULT IN EARLY IGNITOR FAILURE.
ONLY A
QUALIFIED SERVICER SHOULD EVER HANDLE THE IGNITOR.
CAUTION
ANNUAL INSPECTION
The furnace should be inspected by a qualified 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 work-
ing order and that the heating system functions appropri-
ately. Pay particular attention to the following items. Repair
or service as necessary.
• Flue pipe system. Check for blockage and/or leak-
age. Check the outside termination and the connec-
tions at and internal to the furnace.
• Combustion air intake pipe system (where applicable).
Check for blockage and/or leakage. Check the out-
side termination and the connection at the furnace.
• Heat exchanger. Check for corrosion and/or buildup
within the heat exchanger passageways.
• Burners. Check for proper ignition, burner flame, and
flame sense.
• Drainage system. Check for blockage and/or leak-
age. Check hose connections at and internal to fur-
nace.
• Wiring. Check electrical connections for tightness
and/or corrosion. Check wires for damage.
• Filters.
AIR FILTER
NEVER OPERATE FURNACE WIHTOUT A FILTER INSTALLED AS DUST
AND LINT WILL BUILD UP ON INTERNAL PARTS RESULTING IN LOSS OF
EFFICIENCY, EQUIPMENT DAMAMGE, AND POSSIBLE FIRE.
WARNING
Filters must be used with this furnace. Filters do not ship
with these furnaces but must be provided by the installer
for proper furnace operation.
Remember that dirty filters are the most common cause of
inadequate heating or cooling performance.
Maintenance
Improper filter 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. It is the owner's responsibility
to keep air filters clean. When replacing a filter, it must be
replaced with a filter of the same type and size.
Filter Removal
Depending on the installation, differing filter arrangements
can be applied. Filters can be installed in the central return
register, the bottom of the blower compartment (upflow only),
a side panel external filter rack kit (upflow only), or the
ductwork above a counterflow furnace. A media air filter or
electronic air cleaner can be used as an alternate filter.
The filter sizes given in the Product Design section of this
manual or the product Specification Sheet must be fol-
lowed to ensure proper unit performance. Refer to the fol-
lowing information for removal and installation of filters.
FILTER REMOVAL PROCEDURE
Media Air Filter or Electronic Air Cleaner Removal
Follow the manufacturer’s directions for service.
Horizontal Unit Filter Removal
Filters in horizontal installations are located in the central
return register.
INDUCED DRAFT AND CIRCULATION BLOWERS
The bearings in the induced draft blower and circulator
blower motors are permanently lubricated by the manufac-
turer. No further lubrication is required. Check motor wind-
ings for accumulation of dust which may cause overheat-
ing. Clean as necessary.