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

!

CAUTION

UNIT OPERATION HAZARD

Failure to follow this caution may result in intermittent unit
operation.

For proper and safe operation the furnace needs air for
combustion and ventilation. Do not block or obstruct air
openings on the furnace, air opening to the area in which
the furnace is installed, and the space around the furnace.

BEFORE STARTING YOUR FURNACE

Examine the furnace installation to determine that:

1. All flue gas carrying areas external to the furnace are
clear and free of obstructions.

2. The vent connector is in place, slopes upward and is
physically sound without holes or gaps.

3. The return−air duct connection(s) is physically sound, is
sealed to the furnace casing, and terminates outside the
space containing the furnace.

4. The physical support of the furnace is sound without
sagging cracks, gaps, etc. around the base.

5. There are no obvious signs of deterioration of the
furnace.

6. The burner flames are in good adjustment, see Figure 5
(by comparison with pictorial sketches or drawings of the
main burner flame).

Figure 5 Burner Flame Adjustment

Burner Flame

Burner

Figure 7

S If a suspected malfunction occurs with your gas control

system, such as the burners do not light when they
should, refer to the shut down procedures on inside of
main furnace door, or in the “Shutting Down Your
Furnace” section and call your dealer as soon as
possible.

S CHECK AIR FILTER: Before attempting to start your

furnace, be sure the furnace filter is clean and in place.
See “Performing Routine Maintenance” section in this
manual. Do not run the furnace without a filter in place.
Then proceed as follows:

Operating Instructions Inside
Door

FOR YOUR SAFETY READ BEFORE OPERATING

OPERATING

INSTRUCTIONS

L11F048

STEPS FOR STARTING YOUR FURNACE

1. Set your room thermostat mode to off and adjust the set
point to the lowest temperature setting.

Figure 8 Lowest Temperature Setting

40

Manifold

A11461

STARTING YOUR FURNACE

Your furnace uses an automatic, hot surface ignition system
to light the burners each time the thermostat signals the
furnace to start.

Follow these important safeguards:

S Never attempt to manually light the burners with a

match or other source of flame.

Figure 6 Do Not Light Burner with Match

S Read and follow the operating instructions on the

inside of main furnace door (see Figure 7) , especially
the item that reads as follows:
“Wait 5 minutes to clear out any gas. Then smell for
gas, including near the floor. If you smell gas, STOP!
Follow “B” in the safety information on this furnace
label. If you don’t smell gas, go to the next step.”

A92319

2. Close the external manual gas valve.

Figure 9 Close Valve

C

L

O

S

E

L11F049

A06188

4

Specifications subject to change without notice.

440 02 4001 07

3. Turn OFF electrical supply to the furnace.

Figure 10 Turn off Electrical Supply

A92185

4. Remove the outer door by turning knobs, then pull door
forward.

Figure 11 Remove Furnace Door (upflow shown)

6. Turn the control switch to ON.

Figure 13 Control Switch to ON

SINGLE-STAGE GAS CONTROL

GAS CONTROL SWITCH

SHOWN IN “ON” POSITION

MODULATING GAS CONTROL

ON

OFF

GAS CONTROL SWITCH

SHOWN IN “ON” POSITION

7. Replace the outer door by placing flange inside casing,
push door firmly against casing and turn knobs to tighten.

TWO-STAGE GAS CONTROL

CONSULT

MANUAL
BEFORE

ADJUSTING

GAS

PRESSURE

NAT.
GAS

A11291

Figure 14 Furnace Door Replaced

A11302

5. Turn the control switch on the gas control to the OFF

position and wait 5 minutes. See Figure 12. Then smell
for gas, including near the floor. If you smell gas, STOP!
Follow “B” on furnace label and follow the safety
information on the cover of this manual. If you don’t smell
gas, go to next step.

Figure 12 Control Switch to OFF

CONSULT

MANUAL
BEFORE

ADJUSTING

GAS

PRESSURE

NAT.
GAS

TWO-STAGE GAS CONTROL

A11292

SINGLE-STAGE GAS CONTROL

ON

OFF

GAS CONTROL SWITCH

SHOWN IN “OFF” POSITION

MODULATING GAS CONTROL

GAS CONTROL SWITCH

SHOWN IN “OFF” POSITION

A11301

8. Turn ON the electrical supply to the furnace.

Figure 15 Turn On Electrical Supply

A92359

440 02 4001 07

Specifications subject to change without notice.

5

9. Open the external manual gas valve.

Figure 16 Open Valve

O

P

E

N

A06189

10. Set the room thermostat mode to “heat” and adjust the
setpoint to a temperature slightly above the room
temperature. This will automatically signal the furnace to
start. The combustion air draft inducer motor will start
and the hot surface igniter will energize. When hot, the
igniter will have an orange glow.

11. After about seventeen (17) seconds, the gas valve
permits gas to flow to the main burners where it is ignited.
Hot flames begin to warm the furnace’s heat exchanger.
After a time delay of approximately twenty−five to sixty
(25−60) seconds the furnace blower is switched on.

NOTE: If the main burners fail to ignite, the furnace control
system will go through three more ignition cycles. Then if
burners fail to ignite, the system will lockout. If lockout occurs or
the blower does not come on, shut down your furnace and call
your dealer for service.

12. Set your thermostat to the temperature that satisfies your
comfort requirements.

SUGGESTION: Setting the thermostat back a few
degrees—and compensating for the difference with warmer
clothing—can make a big difference in your fuel consumption
on extremely cold days. The few degrees at the top of your
thermostat “comfort level” are the most costly degrees to
obtain.

When the room temperature drops below the temperature
selected on the thermostat, the furnace will switch on
automatically. When the room temperature reaches the setting
selected on the thermostat, the furnace will be automatically
switched off.

Continuous Fan Operation − Some thermostats have a
“FAN” switch with two (2) selections: AUTO and ON. When
thermostat is set on AUTO, the furnace blower cycles on and
off, controlled by the thermostat. In ON position, the furnace
blower runs continuously except for a forty−two to sixty−two
(42−62) second delay at the “call for heat.” Continuous fan
keeps the temperature level in your home more evenly
balanced. It also continuously filters the indoor air.

SHUTTING DOWN YOUR FURNACE

Should you ever suspect a malfunction in your furnace, you
will need to turn the furnace off. The following procedures
must be followed:

1. Set your room thermostat mode to the lowest

temperature setting and set to OFF. (See Figure 8)

2. Close the external manual gas valve (See Figure 9).

3. Turn off electrical supply to the furnace. (See Figure 10)

4. Remove outer furnace door. (See Figure 11)

5. Turn the switch on the gas control to the OFF position.

(See Figure 12)

6. Replace the outer furnace door. (See Figure 14)

7. If the furnace is being shut down because of a
malfunction, call your dealer as soon as possible.

6

Specifications subject to change without notice.

MINIMUM AND MAXIMUM TEMPERATURE

SETTING FOR YOUR FURNACE

This furnace is designed for minimum continuous return−air
temperature of 60°F (15°C) db or intermittent operation down
to 55°F (15°C) db such as when used with a night setback
thermostat. Return−air temperature must not exceed 80°F
(27°C) db. Failure to follow these return−air temperature limits
may affect reliability of heat exchangers, motors, and controls.

PERFORMING ROUTINE MAINTENANCE

With proper maintenance and care, your furnace will operate
economically and dependably. Instructions for basic
maintenance are found on this and the following pages.
However, before beginning maintenance, follow these safety
precautions:

!

ELECTRICAL SHOCK HAZARD

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

Turn off electrical power supply to your furnace before
removing the access doors to service or perform
maintenance.

CUT HAZARD

Failure to follow this caution may result in personal
injury.

Although special care has been taken to minimize
sharp edges, be extremely careful when handling parts
or reaching into the furnace. Wear safety glasses,
gloves, and appropriate protective clothing.

PERSONAL INJURY HAZARD

Failure to follow this caution may result in personal
injury.

Use care when cutting support rods in filters to protect
against flying pieces and sharp rod ends. Wear safety
glasses, gloves, and appropriate protective clothing.

WARNING

!

CAUTION

!

CAUTION

FILTERING OUT TROUBLE

!

UNIT PERFORMANCE HAZARD

Failure to follow this caution may result in product
damage.

Never operate your furnace without a filter in place.
Doing so may damage the furnace blower motor. An
accumulation of dust and lint on internal parts of your
furnace can cause a loss of efficiency.

NOTE: The manufacturer has specified filters which will
enable your furnace to provide lasting comfort and efficiency
throughout its life. Contact your dealer to help you choose
filters for your furnace that both collect dirt before it enters
your furnace, as well as provide a low resistance to circulating
air. Avoid filters that report high cleaning efficiencies, but do
not allow air to pass easily through them.

A dirty filter will cause excessive stress on the furnace, heat
exchanger, and blower motor, and can cause the furnace to

CAUTION

440 02 4001 07

overheat and automatically shut down. The furnace filter
should be checked every four weeks and cleaned or replaced
if necessary.

If installed with disposable media filter, check or replace filter
before each heating and cooling season. Replace disposable
media filter at least twice a year.

If your furnace filter needs replacing, be sure to use the same
size and type of filter that was originally specified.

The air filter for the furnace may be located in a filter
cabinet/rack attached to the side or bottom of the furnace. If
air filter has been installed in another location, contact your
dealer for instructions. To inspect, clean and/or replace the air
filter(s), follow these steps:

1. Turn off the electrical supply to the furnace (see

Figure 10)

2. Remove filter cabinet door/cover.

3. Slide air filter out of filter cabinet/rack. Keep dirty side up
(if dirty) to avoid spilling dirt.

4. Inspect the filter. If torn, replace it.

NOTE: If the filter is:

a. a disposable media filter — Do not clean. If dirty,

replace only with media filter having the same part
number and size. Install with airflow direction arrow
pointing towards blower.

b. an Electronic Air Cleaner (EAC) — Refer to EAC

Owner’s Manual for maintenance information.

c. a washable filter, wash filter (if dirty) in sink, bathtub,

or outside with a garden hose. Always use cold tap
water. A mild liquid detergent may be used if
necessary. Spray water through filter in the opposite
direction of airflow. Allow filter to dry.

5. Reinstall clean air filter.

6. Replace filter cabinet door.

7. Turn on electrical supply to furnace (See Figure 15).

NOTE: If side return ducts are used, two filters may be
required in some models. The procedure listed above may be
used to remove side filters.

Washable filters may be field modified by cutting filter material
and support rods (3) in filters. Alternate sizes and additional
filters may be ordered from your dealer.

Filter Size Information − inch (mm)

FURNACE CASING

WIDTH

14-3/16 (360) 16 x 25 x 3/4 (406 x 635 x 19) 14 x 25 x 3/4 (356 x 635 x 19) Washable*

17-1/2 (445) 16 x 25 x 3/4 (406 x 635 x 19) 16 x 25 x 3/4 (406 x 635 x 19) Washable*

21 (533) 16 x 25 x 3/4 (406 x 635 x 19) 20 x 25 x 3/4 (508 x 635 x 19) Washable*

24-1/2 (622) 16 x 25 x 3/4 (406 x 635 x 19) 24 x 25 x 3/4 (610 x 635 x 19) Washable*

* Recommended to maintain air filter face velocity. See Specification for part number.

**Some furnaces may have 2 filters

SIDE RETURN BOTTOM RETURN

FILTER SIZE

COMBUSTION AREA AND VENT SYSTEM

! WARNING

CARBON MONOXIDE POISONING HAZARD

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

For proper and safe operation the furnace needs air for
combustion and ventilation. Do not block or obstruct air
openings on the furnace, air opening to the area in which
the furnace is installed, the inlet and vent openings on the
exterior of home, and the space around the furnace.

Inspect the combustion area and vent system before each
heating season. An accumulation of dirt, soot, or rust can
mean a loss of efficiency and improper performance. Buildups
on the main burners can cause faulty firing. This “delayed
ignition” is characterized by an alarmingly loud sound.

NOTE: If your furnace makes a loud noise when the main
burners are ignited, shut down the furnace and call your
servicing dealer.
Use your flashlight and follow these steps for inspecting the
combustion area and vent system of your furnace:

1. Turn off gas and electrical supply to the furnace and
remove the access door. (See Figure 9 and Figure 11)

2. Carefully inspect the gas burner for dirt, rust, or scale.

!

CARBON MONOXIDE POISONING HAZARD

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

If dirt, rust, soot, or scale accumulations are found, call
your dealer. Do not operate your furnace.

3. Inspect the vent pipe for a sag, holes, or a disconnection.
A horizontal vent pipe must slope upward away from
furnace. If open joints or seams, or signs of water
leakages are found, call your dealer for service.

4. If your furnace is free of the above conditions, turn on gas
and electrical supplies to the furnace. (See Figure 15
and Figure 16)

CARBON MONOXIDE POISONING HAZARD

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

If holes are found or if the vent pipe is obstructed or is
not connected, toxic fumes can escape into your home.
DO NOT OPERATE YOUR FURNACE. Call your dealer
for service.

WARNING

!

WARNING

FILTER TYPE

!

ELECTRICAL SHOCK HAZARD

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

Turn off electrical power supply to your furnace before
removing the access doors to service or perform
maintenance.

440 02 4001 07

WARNING

Specifications subject to change without notice.

5. Restore electrical power to the furnace.

6. Start the furnace and observe its operation. If possible,
watch the burner flames. Are they burning bright blue? If
not or if you suspect some other malfunction, call your
servicing dealer.

7. Replace the access door. (See Figure 14)

7

WINTERIZATION

!

CAUTION

UNIT AND PROPERTY OPERATION HAZARD

Failure to follow this caution may result in unit component or
property damage.

If the furnace is installed in an unconditioned space where
the ambient temperatures may be 32° F (0° C) or lower,
freeze protection measures must be taken to prevent minor
property or product damage.

!

CAUTION

UNIT COMPONENT DAMAGE HAZARD

Failure to follow this caution may result in damage to the
furnace and other property damage.

Do not use ethylene glycol (Automotive antifreeze coolant
or equivalent). Failure of plastic components may occur.

Since the furnace uses a condensing heat exchanger, some
water will accumulate in the unit as a result of the heat
transfer process. Therefore, once it has been operated, it
cannot be turned off and left off for an extended period of time
when temperatures will reach 32° F (0° C) or lower unless
winterized. Follow these procedures to winterize your furnace:

1. Obtain propylene glycol (RV/swimming pool antifreeze or
equivalent).

!

ELECTRICAL SHOCK HAZARD

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

Turn off electrical power supply to your furnace before
removing the access doors to service or perform
maintenance.

2. Turn off gas and electrical supplies to your furnace. See
Figure 9 and Figure 10.

3. Remove furnace control compartment door. See
Figure 11.

4. Remove one of the unused rubber plugs in the port on
the collector box opposite the condensate trap. See
Figure 17.

5. Connect a field supplied 3/8-in. (9.5-mm) ID tube to the
open port on the collector box. See Figure 17.

WARNING

Figure 17 Antifreeze into Funnel/Tube

Representative drawing only, some models may vary in appearance.

L11F065

6. Insert a field supplied funnel into the tube.

7. Pour one (1) quart of antifreeze solution into the
funnel/tube. Antifreeze should run through the inducer
housing, overfill condensate trap and flow to an open
drain.

8. If a condensate pump is used, check with pump
manufacturer to verify pump is safe for use with
antifreeze used. Allow pump to start and pump antifreeze
to open drain.

9. Remove funnel and tube from collector box.

10. Replace plug in collector box.

11. Remove other plug and repeat steps 4 through 10.

12. Replace main door. See Figure 14.

13. When furnace is re-started, flush condensate pump with
clear water to check for proper operation before
re-starting furnace.

14. Antifreeze need not be removed before re-starting
furnace.

8

Specifications subject to change without notice.

440 02 4001 07

BEFORE YOU REQUEST A

“SERVICE CALL”

If your furnace is not operating or not performing
properly, you may save the expense of a service call by
checking a few things yourself before calling for service:

This furnace has a light emitting diode (LED) status code
display to aid the installer, service technician, or homeowner
while installing or servicing the unit. The LED code can be
seen through the view port in the blower access panel.

NOTE: Record the LED status code BEFORE removing the
blower access door or turning off 115−V power to the furnace.
See the information booklet inside the main furnace door for a
service code legend (See Figure 7)

S Check for sufficient airflow. Check the air filter for dirt. Check

for blocked return−air or supply−air grilles. Be sure they are
open and unobstructed. If this isn’t the cause of the problem,
call your servicing dealer. If your furnace isn’t operating at all,
check the following list for easily solved problems:

S Is your thermostat set above room temperature? Is the HEAT

mode selected?

S Is the electrical power supply switch on? Is the blower access

door firmly in place? Are any fuses blown? (There is a fuse
on the furnace control.) Has a circuit breaker tripped?

S Is the manual shut−off valve in the gas supply pipe leading to

the furnace open? Does the lever point in the same direction
that the pipe runs (open)? Or is it at a right angle to the pipe
(closed)? NOTE: Before proceeding with the next checks,
turn off the electrical power supply to the furnace. Remove
access door.

S Is the switch on the gas valve turned to the ON position? If

this or the preceding check shows an interruption in the gas
supply, make sure the gas has not been shut off for safety
reasons. If nothing else seems to be wrong, follow the
start−up procedures found on page 4 of this booklet.

S Check the two manual reset rollout switches located on the

burner enclosure. (See Figure 1 ) If the furnace has
experienced a high−temperature condition due to
inadequate combustion air, these switches will shut off the
furnace. Reset the switches by pushing the button on the
switch. If the switch trips a second time, turn off the furnace
and call for service.

If your furnace still fails to operate, call your servicing dealer.
Provide your dealer the model and serial numbers for your
furnace. (You should have them recorded on the last page of
this booklet.) By knowing exactly which furnace you have, the
dealer may be able to offer suggestions over the phone or
save valuable time through knowledgeable preparation for the
service call.

440 02 4001 07

Specifications subject to change without notice.

9

NOTE TO EQUIPMENT OWNER:

For your convenience, please record the model and serial numbers of your new equipment in the spaces
provided. This information, along with the installation data and dealer contact information will be helpful
should your system require maintenance or service.

FURNACE

Model # _____________________________________

Serial # ______________________________________

AIR CONDITIONER OR HEAT PUMP

Model # _____________________________________

Serial # _____________________________________

INDOOR COIL (Furnace Coil or Fan Coil)

Model # _____________________________________

Serial # _____________________________________

INSTALLATION INFORMATION:

Date Installed ________________________________

DEALERSHIP CONTACT INFORMATION:

Company Name_______________________________

Address______________________________________

_____________________________________________

Phone Number _______________________________

Technician Name _____________________________

_____________________________________________

_____________________________________________

NOTE TO INSTALLER:

This manual must be left with the equipment owner.

Monthly maintenance items may be performed by the homeowner. All other service and maintenance items
MUST be performed by qualified service technicians

MAINTENANCE CHECKLIST

In addition to the type of routine maintenance you might be willing to perform; your furnace should be inspected regularly by a
properly trained service technician.

You should work with your dealer or service technician to assure your inspection includes the following at a minimum.

DESCRIPTION

Monthly Semi-Annually Annually

Furnace specific, external items:

Clean or replace air filters. X
Inspect cabinet for signs of damage. X
Inspect electrical disconnect for proper function. Repair or replace as necessary. X
Inspect external wiring for damage. X
Inspect gas supply line and manual shutoff for leaks. X

Furnace specific, internal items:

Inspect gas valve and check for proper manifold gas pressure Adjust as needed. X
Inspect ignition system and safety controls. Clean and adjust as needed. X
Inspect control box, associated controls, wiring and connections. X
Check combustion blower housing for lint and debris and clean as necessary. X
Inspect burner assembly  clean as needed. X
Inspect RPJ® heat exchanger  clean as needed. X

Inspect and clean blower assembly (includes blower housing, blower wheel and
motor).

Inspect flue system—check for proper attachment to the furnace, any dislocated
sections, and for signs of corrosion. Replace if necessary.

System:

Inspect airflow system (ductwork)—check for leaks and repair as needed. X

This list may not include all maintenance items, and inspection interval times may vary depending on operational conditions of the
furnace.

Ask your servicing dealer for further details about an economical service contract that covers seasonal inspections.

Inspect evaporator coil, drain pan and condensate drain lines as applicable.
Clean as needed.

INSPECTION INTERVAL

X

X

X

10

Copyright 2017 International Comfort Products

Lewisburg, Tennessee 37091 USA

Specifications subject to change without notice.

440 02 4001 07