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2. Power interruption. Interrupt 115 volt power to the fur-
nace for greater than 20 seconds.
3. Thermostat cycle. Interrupt thermostat signal to the
furnace for between 0 and 20 seconds.
If the condition which originally caused the lockout still
exists, the control will return to lockout. If your furnace
frequently locks out, a problem exists which must be cor-
rected. Contact a qualified servicer.
R
M
OUTINE
AINTENANCE
Maintenance is to be performed by a qualified service tech-
nician only. User maintenance is to be restricted to fre-
quent air filter changes and to ensure the warnings and
notices found elsewhere in this manual be followed. We
recommend that at a minimum system maintenance be
performed by a qualified service technician prior to the
beginning of each heating season, and if equipped with air
conditioning, prior to air conditioning season.
P
ERSONAL
INJURY
OR
DEATH
MAY
MAINTENANCE
PERFORMED
BY
UNTRAINED
INSTALLING
DEALER
OR
OTHER
QUALIFIED
PERFORM
THE
MAINTENANCE
INSPECTION
T
O
PREVENT
PERSONAL
INJURY
OR
DISCONNECT
ELECTRICAL
POWER
A
I
NNUAL
NSPECTION
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 by a quali-
fied technician. This will insure that all furnace compo-
nents are in proper working order and that the heating sys-
tem functions appropriately. Particular attention should
be paid to the following items. Repair or service as neces-
sary.
• Flue pipe system. Check for blockage and/or leakage.
Check the outside termination and the connections at
and internal to the furnace.
WARNING
RESULT
FROM
IMPROPER
. C
PERSONNEL
ALL
YOUR
SERVICE
COMPANIES
TO
.
WARNING
DEATH
DUE
TO
ELECTRIC
SHOCK
.
BEFORE
SERVICING
THIS
UNIT
Check the
Burner Flames for:
1. Stable, soft and blue.
2. Not curling, floating
or lifting off.
• 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 flame, and
flame sense. Flames should extend directly outward
from burners without curling, floating or lifting off.
• Wiring. Check electrical connections for tightness and/
or corrosion. Check wires for damage.
• Drainage system. Check for blockage and/or leakage.
Check hose connections at and internal to furnace.
• Filters. Check that filters are clean and in the proper
placement in the furnace or duct system.
M
OTORS
The combustion air motor and indoor blower motor are per-
manently lubricated and require no further lubrication.
F
ILTERS
T
O
AVOID
PROPERTY
DISCONNECT
ELECTRICAL
PERFORMING
ANY
WITHOUT
A
FILTER
ON
INTERNAL
PARTS
DAMAGE
OR
POSSIBLE
,
A return air filter is not supplied with this furnace and can-
not be installed inside the cabinet; however, a means of
filtering all of the return air (intake) must be provided.
Your installer will supply filters at the time of installation.
Become familiar with filter location and procedures for re-
moving, cleaning and replacing them.
If you need assistance, contact the installer of your fur-
nace or another qualified servicer.
Filters must be inspected, cleaned or changed every two
months or as required. As a homeowner, it is your personal
responsibility to keep air filters clean. Remember that dirty
filters are the most common cause of inadequate heating
or cooling performance.
F
R
ILTER
EMOVAL
Depending on the installation, differing filter arrangements
can be applied. Filters can be located in a central return
grille or a side panel external filter rack (upflow only). To
remove filters from an external filter rack, follow the di-
rections provided with external filter rack kit.
7
WARNING
,
DAMAGE
PERSONAL
INJURY
OR
POWER
BEFORE
REMOVING
. N
OTHER
MAINTENANCE
EVER
OPERATE
INSTALLED
BECAUSE
DUST
AND
LINT
RESULTING
IN
LOSS
OF
EFFICIENCY
.
FIRE
,
DEATH
FILTERS
OR
FURNACE
WILL
BUILD
UP
,
EQUIPMENT
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