3
440 02 7000 02
Specifications subject to change without notice.
12
Air filter and retainer. (Location in furnace may
vary.)
13
Rollout switch (manual reset ) to prevent overtem-
perature.
14
Primary serpentine heat exchanger (inside),
stretches fuel dollars with the S
−
shaped heat
−
flow
design. Solid construction of corrosion
−
resistant
aluminized steel means reliability.
15
3
−
amp fuse provides electrical and com-
ponent protection.
16
Status code light emitting diode (LED) on furnace
control board. Status code light is for diagnosing
furnace operation and service requirements.
17
Furnace control board.
18
Blower access panel safety interlock switch.
19
Transformer (24v) behind furnace control board
provides low
−
voltage power to furnace control
board and thermostat.
IMPORTANT FACTS (DO’S AND DON’TS)
S
DO: READ AND UNDERSTAND THIS MANUAL.
S
DO: Have your furnace and vent system inspected annually by a
qualified service technician.
S
DO: Inspect your filter monthly and clean or replace when
needed.
S
DO: Provide adequate airflow to the furnace for efficient
combustion and safe ventilation.
S
DO: Keep your furnace free and clear of insulating material.
Some materials may be combustible. Examine the furnace area
when the furnace is installed or when insulation is added.
S
DO NOT: Enclose your furnace in an airtight room or seal it
behind solid doors.
S
DO NOT: Keep combustible materials, gasoline, and other
flammable liquids or vapors around your furnace.
S
DO NOT: Cover your furnace in any manner.
S
DO NOT: Store anything (including trash or debris) near your
furnace.
S
DO NOT: In any way block or restrict airflow around your
furnace.
S
DO NOT: In any way block or restrict airflow to your supply air
and return air grills.
S
DO NOT: Use your furnace room as a broom closet or a place to
store any kind of chemical or cleaner.
S
DO NOT: Contaminate the air used for combustion of your
furnace with any kind of chemical or fumes. This could also
cause heat exchangers, metal vent systems or components to
deteriorate.
NOTE
: These chemicals or fumes are present in many products
around the home, such as: water softener salts, any type of
household cleaning product, any type of laundry product,
adhesives, paints, varnishes, paint strippers, waxes and plastics, etc.
During remodeling be sure the combustion air is fresh and
uncontaminated. If these compounds are burned in your furnace,
the heat exchangers and metal vent system may deteriorate.
NOTE
: The qualified installer or agency must use only
factory
−
authorized replacement parts, kits, and accessories when
modifying this product.
This furnace contains safety devices which must be manually reset.
If the furnace is left unattended for an extended period of time,
have it checked periodically for proper operation. This precaution
will prevent problems associated with no heat, such as frozen water
pipes, etc. See “Before You Request a Service Call” section in this
manual.
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in injury, death, or
property damage.
Do not keep combustible materials, gasoline, and other
flammable liquids or vapors around your furnace.
!
WARNING
FIRE OR EXPLOSION HAZARD
Failure to follow warnings could result in personal injury,
death, or property damage.
Keep insulation clear of furnace and maintain clearances
shown on unit clearance label.
!
WARNING
SAFETY CONSIDERATIONS
Installing and servicing of heating equipment can be hazardous due to
gas and electrical components. Only trained and qualified personnel
should install, repair, or service heating equipment.
Untrained personnel can perform basic maintenance functions such
as cleaning and replacing air
filters
. All other operations must be per-
formed by trained service personnel. Observe safety precautions in
this manual, on tags, and on labels attached to the furnace and other
safety precautions that may apply.
Recognize safety information. This is the safety
−
alert symbol
.
When you see this symbol on the furnace and in instructions or
manuals, be alert to the potential for personal injury.
Understand the signal words DANGER, WARNING, CAUTION,
and NOTE. DANGER, WARNING, and CAUTION are used with
the safety
−
alert symbol. DANGER identifies the most serious haz-
ards which
will
result in severe personal injury or death. WARNING
signifies hazards which
could
result in personal injury or death.
CAUTION is used to identify unsafe practices which
may
result in
minor personal injury or product and property damage. NOTE is used
to highlight suggestions which
will
result in enhanced installation, re-
liability, or operation.
To minimize the possibility of serious personal injury,
fire
, damage to
your furnace, or improper operation,
carefully follow these safety
rules
which apply to both direct
−
vent and non
−
direct vent applica-
tions:
Your new gas furnace may have been installed in 1 of 2 ways, as a dir-
ect
−
vent (2
−
pipe
−
Figure 2) application or as a non
−
direct vent
(1
−
pipe
−
Figure 3) application.
In a direct
−
vent (2
−
pipe) application, your furnace uses air from out-
side the home for combustion and vents
flue
gas to the outdoors. This
type of application will have 2 pipes running from the furnace to the
outdoors. (See Fig. 2.) In this application, the vent and air
−
intake
pipes must terminate outside the structure and must not be obstructed
in any way. Do not block or obstruct air openings on furnace or spaces
around furnace.
In a non
−
direct vent (1
−
pipe) application, your furnace uses air from
adjacent to the furnace for combustion and vents
flue
gas to the out-