GMES8 GCES8 Service Manual

39
MAINTENANCE
WARNING
HIGH VOLTAGE
D
ISCONNECT
ALL
POWER BEFORE SERVICING OR
INSTALLING THIS UNIT.
M
ULTIPLE POWER SOURCES MAY
BE PRESENT.
F
AILURE TO DO SO MAY CAUSE PROPERTY
DAMAGE, PERSONAL INJURY OR DEATH.
I
F YOU
M
US
T HANDLE THE ITNITOR, HANDLE WITH CARE. T OUCHING
THE IGNITOR BODY WITH BARE FINGERS, ROUGH HANDLING, OR
VIBRATION COULD RESULT IN EARLY IGNITOR FAILURE. O NLY A
QUALIFIED SERVICER SHOULD EVER HANDLE THE IGNITOR.
CAUTION
ANNUAL INSPECTION
The furnace should be inspected by a qualied 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.
• Combustion air intake pipe system (where applicable).
Check for blockage and/or leakage. Check the outside
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 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.
AIR FILTER
N
EVER 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 lters are the most common cause of
inadequate heating or cooling performance.
Maintenance
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. It is the owner's responsibility to keep
air lters clean. When replacing a lter, it must be replaced
with a lter of the same type and size.
Filter Removal
Depending on the installation, differing lter arrangements
can be applied. Filters can be installed in the central return
register, the bottom of the blower compartment (upow
only), a side panel external lter rack kit (upow only), or
the ductwork above a counterow furnace. A media air lter
or electronic air cleaner can be used as an alternate lter.
The lter sizes given in the Product Design section of this
manual or the product Specication Sheet must be followed
to ensure proper unit performance. Refer to the following
information for removal and installation of lters.
FILTER REMOVAL PROCEDURE
Media Air Filter or Electronic Air Cleaner Removal
Follow the manufacturer’s directions for service.
Upright Counterow Filter Removal
To remove lters from the ductwork above an upright coun-
terow installation:
1. Turn off electrical power to furnace.
2. Remove access door in ductwork above furnace.
3. Remove lters.
4. Remove blower compartment door. Vacuum compart-
ment. Replace blower compartment door.
5. Replace lters opposite of removal.
6. Replace access door in ductwork.
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 blow-
er 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.
FLAME SENSOR (QUALIFIED SERVICER ONLY)
Under some conditions, the fuel or air supply can create a
nearly invisible coating on the ame sensor. This coating acts
as an insulator, causing a drop in the ame sensing signal.
If this occurs, a qualied servicer must carefully clean the
ame sensor with steel wool. After cleaning, the ame sensor
output should be as listed on the specication sheet.