ICP N9MSE1402420A1, N9MSE1202420A1, N9MSE1002120A1, N9MSE1002114A1, N9MSE0802120A1 Owner’s Manual

HOME OWNER’S INFORMATION

High Efficiency

Condensing Gas Furnace

Our products are designed, tested and built in accordance with DOE standardized procedures; however, actual operating
results and efficiencies may vary based on manufacturing and supplier tolerances, equipment configuration, operating
conditions and installation practices.

NOTE TO INSTALLER:
This manual must be left with the equipment user.

USER: Please read all instructions in the manual and

retain all manuals for future reference.

! WARNING

FIRE OR EXPLOSION HAZARD

Failure to follow warnings could result in personal injury,
death, or property damage.

Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance.

WHAT TO DO IF YOU SMELL GAS

−Do not try to light any appliance.

−Do not touch any electrical switch; do not use any

phone in your building.

−Leave the building immediately.

−Immediately call your gas supplier from a nearby

phone. Follow the gas supplier’s instructions.

−If you cannot reach your gas supplier, call the fire
department.

Installation and service must be performed by a qualified
installer, service agency or the gas supplier.

! WARNING

CARBON MONOXIDE POISONING HAZARD

Failure to follow this warning could result in personal injury
and/or death.

Carbon Monoxide is invisible, odorless, and toxic! Install a
carbon monoxide alarm in your home, even if you do not
own a gas appliance. Locate the carbon monoxide alarm in
the living area of your home and away from gas appliances
and doorways to attached garages. Follow the alarm
manufacturer’s instruction included with the alarm.

Illustrations and photographs are only representative. Some product models may vary.

!

ELECTRICAL OPERATION HAZARD

Failure to follow this warning could result in personal
injury, death, or property damage.

Do not use this furnace if any part has been under
water. A flood−damaged furnace is extremely
dangerous. Attempts to use the furnace can result in fire
or explosion. A qualified service agency should be
contacted to inspect the furnace and to replace all gas
controls, control system parts, or electrical parts that
have been wet, or the entire furnace if deemed
necessary.

WARNING

Use of the AHRI Certified TM Mark indicates a
manufacturer’s participation in the program. For
verification of certification for individual products,
go to www.ahridirectory.org .

Specifications subject to change without notice.

! WARNING

ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD

Failure to follow this warning exactly could result in
dangerous operation, serious injury, death or property
damage.

Improper servicing could result in dangerous operation,
serious injury, death or property damage.

S Before servicing, disconnect all electrical power to furnace.
S When servicing controls, label all wires prior to

disconnecting. Reconnect wires correctly.

S Verify proper operation after servicing

440 02 4001 07 8/9/2017

TABLE OF CONTENTS

FURNACE COMPONENTS 2...............................

IMPORTANT FACTS (DO’S AND DON’TS) 2..................

SAFETY CONSIDERATIONS 2..............................

BEFORE STARTING YOUR FURNACE 4.....................

STARTING YOUR FURNACE 4.............................

STEPS FOR STARTING YOUR FURNACE 4..................

SHUTTING DOWN YOUR FURNACE 6......................

MINIMUM AND MAXIMUM TEMPERATURE

SETTING FOR YOUR FURNACE 6..........................

PERFORMING ROUTINE MAINTENANCE 6..................

FILTERING OUT TROUBLE 6...............................

COMBUSTION AREA AND VENT SYSTEM 7.................

WINTERIZATION 8........................................

BEFORE YOU REQUEST A “SERVICE CALL” 9...............

MAINTENANCE CHECKLIST 10..............................

FURNACE COMPONENTS

(Furnace shown in upflow position; may be used in downflow
or horizontal orientation or applications. Vent Elbow may be
turned to a different position, depending on type of
installation)

Figure 1 Furnace Components

HOT SURFACE
IGNITER

MANUAL RESET
ROLLOUT SWITCH

MAIN LIMIT SWITCH

(BEHIND GAS VALVE)

INDUCER MOTOR
ASSEMBLY

BLOWER AND
MOTOR

CAPACITOR/
POWER CHOKE

A170127

FLAME
SENSOR

MANUAL RESET
ROLLOUT SWITCH

GAS VALVE

OPERATING INSTRUCTIONS
NOT SHOWN (LOCATED ON
MAIN FURNACE DOOR, SEE
OPERATING INSTRUCTIONS
INSIDE DOOR FIGURE).

ELECTRICAL JUNCTION
BOX (IF REQUIRED,
LOCATION MAY VARY)

BLOWER DOOR
SAFETY SWITCH

FURNACE
CONTROL
BOARD

RATING PLATE NOT SHOWN

(LOCATED ON BLOWER DOOR)

REPRESENTATIVE DRAWING ONLY, SOME MODELS MAY VARY IN APPEARANCE.

GAS BURNER

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 combustible

material.

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: 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 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 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.

! WARNING

FIRE OR EXPLOSION HAZARD

Failure to follow warnings could result in personal injury,
death, or property damage.

Keep insulation and combustible materials clear of furnace
and maintain clearances shown on unit clearance label.

Do not keep combustible materials, gasoline, and other
flammable liquids or vapors around your furnace.

SAFETY CONSIDERATIONS

Installing and servicing 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 or replacing air filters. All other
operations must be performed 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, and
CAUTION. These words are used with the safety−alert
symbol. DANGER identifies the most serious hazards 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
would result in minor personal injury or product and property
damage. NOTE is used to highlight suggestions which will
result in enhanced installation, reliability, or operation.

S Your new gas furnace may have been installed in one of two

ways, as a direct−vent (2−pipe, Figure 2) application or as a

2

Specifications subject to change without notice.

440 02 4001 07

non−direct−vent (1−pipe, Figure 3) application.

S In a direct−vent (2−pipe) application, your furnace uses air

from outside the home for combustion and vents flue gas to
the outdoors. This type of application will have two pipes
running from the furnace to the outdoors (see Figure 2). In
this application, the vent and air−intake pipes must terminate
outside the structure and must not be obstructed in any way.
In some cases, the inlet air pipe may be located in an area
that has access to outdoor air, such as an attic. In all cases,
the outlet vent pipe must be routed to the outdoors. Do not
bock or obstruct air openings on furnace or spaces around
furnace.

S 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 outdoors. This type of application will
have only one pipe running from the furnace to the outdoors.
(see Figure 3) The other pipe will terminate in the same
space as the furnace and is the source of combustion air for
your furnace. Therefore, the furnace must not be enclosed in
an airtight room or be sealed behind solid doors. It must have
adequate airflow for efficient combustion and safe
ventilation. Do not obstruct the combustion−air pipe in any
way. The vent pipe must terminate outside the structure and
must not be obstructed in any way. Do not block or obstruct
air openings or space around furnace.

Figure 2 Exterior Vent Pipes

L11F046

Figure 3 Interior Combustion − Air Pipe

S Keep the area around your furnace clear and free of

combustible materials, gasoline, and other flammable liquids
and vapors.

! WARNING

FIRE OR EXPLOSION HAZARD

Failure to follow this warning could result in personal injury,
death, or property damage.

Do not keep combustible materials, gasoline, and other
flammable liquids or vapors around your furnace.

Figure 4

S Do not cover the furnace, store trash or debris near it, or in

any way block the flow of fresh air to the unit.

In addition to the safety rules above, make sure that the
following combustion−air requirements are met for non−direct

vent applications:

S Combustion air must be clean and uncontaminated with

chlorine or fluorine. These compounds are present in many
products around the home, such as: water softener salts,
laundry bleaches, detergents, adhesives, paints, varnishes,
paint strippers, waxes, and plastics.

S Make sure the combustion air for your furnace does not

contain any of these compounds. During remodeling be sure
the combustion air is fresh and uncontaminated. If these
compounds are burned in your furnace, the heat exchangers
may deteriorate.

S A furnace installed in an attic or other insulated space must

be kept free and clear of insulating material. Examine the
furnace area when the furnace is installed or when insulation
is added. Some insulation materials may be combustible.

!

FIRE AND EXPLOSION HAZARD

Failure to follow this warning could result in personal
injury, death or property damage.

Should the gas supply fail to shut off or if overheating
occurs, turn off the manual gas valve to the furnace
BEFORE turning off the electrical supply and install
lockout tag.

NO Combustible materials near
furnace

WARNING

440 02 4001 07

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.

L11F047

Specifications subject to change without notice.

3