Carrier 58MSA Series User manual

MULTIPOISE, CONDENSING 58MSA

GAS FURNACE

— 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

neighbor’s 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 is invisible, odorless, and toxic!

Carrier Corporation recommends a carbon mon-

oxide 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 ga-

rages. Follow the alarm manufacturer’s instruc-

tion included with the alarm.

NOTE TO INSTALLER:

This manual must be left with the equipment

user.

WARNING:

FIRE OR EXPLOSION HAZARD

Failure to follow safety warnings exactly could

result in serious injury, death, or property damage.

USER: Please read all instructions in

the manual and retain all manuals for

future reference.

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, electrical

parts that have been wet or the furnace if

deemed necessary.

TABLE OF CONTENTS

WELCOME TO A NEW GENERATION OF COMFORT

. . . . . . . 2

GENERAL FURNACE SAFETY

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

FURNACE COMPONENTS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

SAFETY CONSIDERATIONS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

BEFORE STARTING YOUR FURNACE

. . . . . . . . . . . . . . . . . . . . . . . 4

STARTING AND SHUTTING DOWN YOUR FURNACE

. . . . . . . 4

Steps for Starting Your Furnace. . . . . . . . . . . . . . . . . . . . . . . . . .4-6

Shutting Down Your Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

PERFORMING ROUTINE MAINTENANCE

. . . . . . . . . . . . . . . . . 6,7

Filtering Out Trouble. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7,8

COMBUSTION AREA AND VENT SYSTEM

. . . . . . . . . . . . . . . . . . . 8

Heading South For the Winter. . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

A CHECK-UP CHECKLIST

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9,10

BEFORE YOU REQUEST A SERVICE CALL

. . . . . . . . . . . . . . . . . 10

INSTALLATION DATA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

WELCOME TO A NEW GENERATION

OF COMFORT

Congratulations! In light of rising energy costs, the 58MSA Mul-

tipoise, Condensing Gas Furnace is among the soundest invest-

ments today’s homeowner can make.

Your new furnace is truly a triumph of technology in home heat-

ing. A revolutionary design employs 2 heat exchangers to

“squeeze” out the maximum amount of heat from the fuel con-

sumed. In fact, your new furnace is so efﬁcient, 90%* of the heat

generated during combustion is captured and delivered inside

your home. That is more than a 33%* increase in heating efﬁ-

ciency over conventional furnaces.

This furnace is among the most energy-efﬁcient furnaces you can

buy today. It is also among the safest and most dependable. We

are proud of the technological advances incorporated into the de-

sign of this furnace. With only minimal care, your new furnace

will deliver many years of money-saving home comfort and en-

joyment. Spend just a few minutes with this manual to learn the

operation of your new furnace and the small amount of mainte-

nance it takes to help keep it operating at peak efﬁciency year after

year.

*The output capacity and any representations of efﬁciency for this furnace are based on standard

U.S. Department of Energy test precedures.

MODEL 58MSA FURNACE

GENERAL FURNACE SAFETY

1. Combustible Materials, Gasoline Warning

. . . . . . . . . . . . . . . . . . 1,4

2. Furnace Must be Kept Free and Clear of Insulating

Material Warning

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

3. Furnace Needs Air for Combustion and Ventilation Warning

. . .4

4. Starting (Lighting) and Shutting Down the

Furnace Warning

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–6

5. Proper Furnace Shutdown Procedures

. . . . . . . . . . . . . . . . . . . . . . .6

6. Flood Damage Warning

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

7. Fire or Explosion Hazard Warning

. . . . . . . . . . . . . . . . . . . . . . . . . .1

8. Carbon Monoxide Warning

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

9. Service and Maintenance Electrical Hazard Warning

. . . . . . . . . .7

10. Improper Vent Warning

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

11. Sharp Edges Caution

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

12. No Filter Caution

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

13. Filter Rod Modiﬁcation Caution

. . . . . . . . . . . . . . . . . . . . . . . . . . . .8

14. Dirt, Rust, or Accumulation Caution

. . . . . . . . . . . . . . . . . . . . . . . . .8

15. Freeze Damage Caution

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7,9

16. Loud Noise Caution

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

17. Antifreeze Caution

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

CERTIFIED

As an ENERGY STAR®

Partner, Carrier Corpo-

ration has determined

that this product meets

the ENERGY STAR®

guidelines for energy

efﬁciency.

FURNACE COMPONENTS

Burner sight glass for viewing burner flame.

Burner assembly (inside). Operates with energy-saving

inshot burners, and hot surface igniter for safe,

dependable heating.

Combustion-air intake connection (right or left side).

Redundant gas valve. Safe and efficient. Features 1 gas

control with 2 internal shutoff valves.

Junction box for 115-v electrical power supply.

Vent outlet. Uses PVC pipe to carry flue gas from the fur-

nace’s combustion system (right or left side).

Secondary condensing heat exchanger (inside). Wrings

out more heat through condensation. Constructed with

polypropylene-laminated steel to ensure durability.

Pressure switch. Ensures adequate flow of flue gas

through furnace and out vent system.

Inducer motor. Pulls hot flue gases through the heat ex-

changers, maintaining negative pressure for added safety.

Condensate drain connection. Collects moisture con-

densed from burned gases for disposal into home drain

system. (Location in furnace varies)

MODEL 58MSA FURNACE

(SHOWN IN UPFLOW POSITION)

Heavy-duty blower. Circulates air across the heat ex-

changers to transfer heat into the home.

Air filter and retainer.

Rollout switch (manual reset) to prevent overtemperature.

Primary serpentine heat exchanger (inside). Stretches fuel

dollars with the S-shaped heat-flow design. Solid con-

struction of corrosion-resistant aluminized steel means re-

liability.

3-amp fuse provides electrical and component protection.

Light emitting diode (LED) on furnace control board.

Code light is for diagnosing furnace operation and service

requirements.

Furnace Control board.

Blower access panel safety interlock switch.

Transformer (24v) behind furance control board provides

low-voltage power to furnace control board and thermo-

stat.

SAFETY CONSIDERATIONS

Recognize safety information. This is the safety-alert sym-

bol . 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 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 per-

sonal injury or product and prop-erty damage. NOTE is used

to highlight suggestions which

will

result in enhanced instal-

lation, reliability, or operation.

To minimize the possibility of serious personal injury, ﬁre,

furnace damage, or improper operation;

carefully follow

these safety rules:

Your gas furnace uses air adjacent to the furnace for combus-

tion and vents to the outside. Do not enclose it in an airtight

room or seal it behind solid doors. It must have adequate air-

ﬂow for efﬁcient combustion and safe ventilation. The vent

pipe must terminate outside the structure and must not be

obstructed in any way.

•Keep the area around your furnace clear and free of com-

bustible materials, gasoline, and other ﬂammable liquids and

vapors.

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

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

•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, var-

nishes, paint strippers, waxes, and plastics.

•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.

•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.

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.

BEFORE STARTING YOUR FURNACE

Examine the furnace installation to determine that:

1. All ﬂue gas carrying areas external to the furnace (i.e.

chimney, vent connector) are clear and free of obstruc-

tions.

2. The vent connector is in place, slopes upward and is phys-

ically sound without holes or excessive corrosion.

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 sag-

ging cracks, gaps, etc. around the base.

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

6. The pilot and burner ﬂames are in good adjustment (by

comparison with pictorial sketches or drawings of the

main burner ﬂame and, if applicable, the pilot burner

ﬂame).

WARNING

Fire Hazard! Failure to keep insulation clear of

furnace could result in fire, personal injury/death

or property damage.

WARNING

Do not keep combustible materials, gasoline, and

other flammable liquids or vapors around your

furnace. Failure to follow this warning could result

in fire, personal injury/death or property damage.

WARNING

For proper and safe operation the furnace needs

air for combustion and ventilation. Do not block

or obstruct the openings on the furnace, air

openings to the area in which the furnace is in-

stalled, and the space around the furnace. Failure

to follow this warning could result in fire, personal

injury/death or property damage.

STARTING AND SHUTTING DOWN

YOUR FURNACE

Should the gas supply fail to shut off or if over heating occurs,

shut off gas valve to the furnace before shutting of the elec-

trical supply. Instead of a continuously burning pilot ﬂame

which wastes valuable energy, your furnace uses an automat-

ic, hot surface ignition system to light the burners each time

the thermostat starts your furnace.

Follow these important

safeguards:

•Never attempt to light the burners manually with a match

or other source of ﬂame.

•Read and follow the operating instructions on the inside

of main furnace door, 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 above on this furnace label. If you

don’t smell gas, go to the next step.

•If a suspected malfunction occurs with your gas control

system, such as the burners not lighting when they should,

refer to the shutdown procedures on the inside of main fur-

nace door, or in the “Shutting Down Your Furnace”section

and call your dealer as soon as possible.

•

Check Air Filter:

Before attempting to start your furnace,

be sure the furnace air ﬁlter is clean and in place. See “Per-

forming Routine Maintenance”section in this manual. Then

proceed as follows:

STEPS FOR STARTING YOUR FURNACE

1. Set your room thermostat to the lowest temperature set-

ting. (See Fig. 6.)

2. Close the external manual gas valve. (See Fig. 7.)

3. Turn OFF electrical supply to the furnace. (See Fig. 8.)

4. Remove main furnace door. (See Fig. 9.)

5. The gas valve will have a control switch to turn off and on.

Turn the control switch on the gas control to the OFF

position and wait 5 minutes. (See Fig. 10.) Then smell for

gas, including near the ﬂoor. If you smell gas,

STOP!

Fol-

low operating instructions on main furnace door.

6. After waiting 5 minutes, turn the control switch on the gas

control to the ON position. (See Fig. 11.)

7. Replace main furnace door. (See Fig. 12.)

WARNING

If overheating occurs or the gas valve fails to shut

off the gas supply, turn off the manual gas valve to

the furnace BEFORE turning off the electrical sup-

ply. (See Fig. 7.) Failure to follow this warning

could result in a fire or explosion, and personal in-

jury/death or property damage.

13 14

8. Turn ON the electrical supply to the furnace and wait 1

minute. (See Fig. 13.)

9. Open the external manual gas valve. (See Fig. 14.)

10. Set the room thermostat to a temperature slightly

above the room temperature. This will automatically

signal the furnace to start.

11. When the furnace receives the start signal, the inducer is

started. When the pressure switch senses that there is suf-

ﬁcient combustion air, the hot surface igniter is energized.

After the hot surface igniter is heated for 17 seconds, the

gas valve permits gas to ﬂow to the main burners. After

ignition and a time delay of approximately 60 sec, the fur-

nace blower starts.

NOTE:

If the burners fail to ignite after 4 attempts, the fur-

nace control system will lock out. If lockout occurs, main

burners fail to light, or blower does not come on, shut down

the 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. The few degrees at

the top of your thermostat “comfort level’’ are the most

costly degrees to obtain.

When room temperature drops below the temperature

selected on the thermostat, the furnace will be switched

on automatically. When the room temperature reaches

the temperature selected on the thermostat, the furnace

will be switched off automatically.

Some thermostats have a FAN mode with 2 selections,

AUTO and ON. When set on AUTO, the furnace blower

cycles on and off. In ON mode, the furnace blower runs

continuously. Continuous fan keeps the temperature lev-

el in your home more evenly balanced. It also permits the

indoor air to be continuously ﬁltered.

SHUTTING DOWN YOUR FURNACE

Should you need to shut down your furnace for service or

maintenance, you will need to turn the furnace off. The fol-

lowing procedures must be followed:

1. Set your room thermostat to the lowest temperature

setting. (See Fig. 15.)

2. Close the external manual gas valve (See Fig. 7.)

3. Turn off electrical supply to the furnace. (See Fig. 16.)

4. Remove main furnace door. (See Fig. 9.)

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

position. (See Fig. 17.)

6. Replace the control access door. (See Fig. 14.)

7. If the furnace is being shut down because of a malfunc-

tion, call your dealer as soon as possible.

PERFORMING ROUTINE

MAINTENANCE

NOTE:

The qualiﬁed installer or agency must use only

factory-authorized replacement parts, kits, and accessories

when modifying this product.

Installing and servicing heating equipment can be hazard-

ous 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 performed by trained and qual-

iﬁed service agency personnel. Observe safety precautions in

this manual, on tags, and on labels attached to the furnace,

and other safety precautions that may apply.

With proper maintenance and care, your furnace will operate

economically and dependably. Installations for basic mainte-

nance are found on this and the following pages. However,

before beginning maintenance, follow these safety precautions:

FILTERING OUT TROUBLE

A dirty air ﬁlter will cause a loss of airﬂow in your duct

system. When excessive loss of airﬂow occurs, the furnace

may cycle on its safety controls. If this condition is left unat-

tended, the furnace will eventually lock out. It is recom-

mended that the furnace air ﬁlter be checked every 3 or 4

weeks and cleaned if necessary.

If installed with a factory-speciﬁed disposable media ﬁlter,

check or replace ﬁlter before each heating and cooling sea-

son. Replace disposable ﬁlter at least once a year.

The air ﬁlter is normally located in the blower compartment.

(See Fig. 2.) 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 Fig. 16.)

2. Remove main furnace door. (See Fig. 18.)

3. Remove blower access panel. (See Fig. 19.)

NOTE:

It will be necessary to remove 2 screws.

4. Remove air ﬁlter from furnace.

•AIR FILTER(S) LOCATED IN END OF FURNACE:

a. Slide ﬁlter retainer sideways until it is free of latch. (See

Fig. 20.)

b. Slide air ﬁlter out of furnace. (See Fig. 21.)

18 19

20 21

CAUTION

Furnace is not to be installed, operated, and then

turned off and left turned off in an unoccupied

structure during winter. (See “Heading South for

the Winter” procedures in maintenance section on

page 9). Freeze damage to furnace would occur.

WARNING

Turn off electrical power supply to your furnace

before removing the main furnace door to service

or perform maintenance. Failure to follow this

warning could result in personal injury/death or

property damage.

CAUTION

Although special care has been taken to minimize

sharp edges, be extremely careful when handling

parts or reaching into the furnace. Failure to follow

this caution would result in minor personal injury.

CAUTION

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 and

would cause minor property or product damage.

•AIR FILTER LOCATED IN SIDE:

a. Remove ﬁlter retainer from latch. (See Fig. 25.)

b. Gently remove air ﬁlter and carefully turn the dirty side up (if

dirty) to avoid spilling dirt from the ﬁlter. (See Fig. 26.)

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

22 23

NOTE: If washable ﬁlter that was shipped with the furnace has

been replaced with an electronic air cleaner (EAC), refer to the

EAC Owner’s Manual for maintenance information.

6. If washable ﬁlter, wash ﬁlter (if dirty) in a 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.

7. Reinstall clean air ﬁlter.

8. Reinstall ﬁlter retainer.

9. Replace blower access panel and main furnace door. Be sure

to replace 2 screws in blower access panel. (See Fig. 24 and

25.) Turn on electrical supply to the furnace.

24 25

If your furnace air ﬁlter needs to be replaced, be sure to use

the same size that was originally supplied. Use the furnace

ﬁlter table and compare your furnace size with the proper

ﬁlter size.

* Furnace with a side return-air inlet may have a different ﬁlter size. Measure

the ﬁlter to obtain the correct size.

COMBUSTION AREA AND VENT SYSTEM

Visually inspect the combustion area and vent system before

each heating season. Make sure that all PVC pipes leading

into the combustion area and vent are free from any cracks

and sags. Check the combustion-air intake adjacent to the

furnace for blockage. Also check vent pipe on the outside of

your home for blockage.

When dirt, soot, scale, or rust is allowed to build up, your

furnace can suffer a loss of efﬁciency and perform improper-

ly. Accumulations on the main burners can result in ﬁring out

of normal sequence. This delayed ignition creates an alarm-

ingly loud sound.

To inspect the combustion area and vent system, you will

need a ﬂashlight. Refer to Fig. 2, and proceed as follows:

1. Turn off the gas and electrical supplies to the furnace and

remove the main furnace door. (See Fig. 7, 8 and 9.)

2. Remove burner enclosure front. (See Fig. 26 or 27.)

Inspect the gas burners and remainder of furnace and igniter area

for dirt, rust, soot, or scale.

FURNACE AIR FILTER TABLE

AIR FILTER LOCATED IN BLOWER COMPARTMENT

FURNACE

CASING

WIDTH (IN.)

FILTER SIZE*

(IN)

FILTER

TYPE

17-1/2 (1) 16 x 25 x 1 Cleanable

21 (1) 20 x 25 x 1 Cleanable

24-1/2 (1) 24 x 25 x 1 Cleanable

CAUTION

Use care when cutting support rods in filters to pro-

tect against flying pieces and sharp rod ends. Wear

safety glasses, gloves, and appropriate protective

clothing. Failure to follow this caution could result

in personal injury.

DANGER

If holes are found in the pipes or if any portion has

become disconnected, toxic fumes can escape

into your home. DO NOT OPERATE YOUR FUR-

NACE. Call your dealer for service. Failure to fol-

low this warning could result in personal injury or

death.

CAUTION

If your furnace makes an especially loud noise

when the main burners light, shut down your fur-

nace and call your dealer. Failure to follow this

caution would result in minor property damage.

3. Inspect the combustion-air and vent PVC pipes for sags,

holes, cracks, or disconnections. Horizontal portions of

vent pipe must slope downward toward furnace.

26 27

4. Reinstall burner enclosure front.

5. If your furnace is free of the above conditions, replace

main furnace door and turn on electrical and gas supplies

to the furnace. (See Fig. 12, 13, and 14.)

6. Start the furnace and observe its operation. Watch the

burner ﬂames to see if they are clear blue, almost transpar-

ent. (See Fig. 28.) If you observe a suspected malfunction,

or the burner ﬂames are not clear blue, call your dealer

HEADING SOUTH FOR THE WINTER?

DON’T FORGET YOUR FURNACE!

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 or lower unless winterized. Follow these procedures

to winterize your furnace:

1. Obtain propylene glycol (RV/swimming pool antifreeze

or equivalent)

2. Turn off electrical supply to the furnace. (See Fig. 16.)

3. Remove main furnace door. (See Fig. 18.)

4. Remove upper right inducer housing drain connection

cap. (See Fig. 29.)

5. Connect ﬁeld-supplied 1/2-in. ID tube to upper inducer

housing drain connection.

6. Insert ﬁeld-supplied funnel into tube.

7. Pour 1 quart of antifreeze into funnel/tube. Antifreeze

should run through inducer housing, overﬁll condensate

trap, and ﬂow into open ﬁeld drain. (See Fig. 30.)

8. Remove funnel and tube from inducer housing and

replace drain connection cap and clamp.

9. Replace main furnace door. (See Fig. 25.)

10. Propylene glycol need not be removed before restarting

furnace.

A CHECK-UP CHECKLIST

Your furnace represents an important investment in your fami-

ly’s comfort and your home’s value. To keep it performing

properly and to prevent future problems, have a trained service

specialist give your furnace a professional check-up annually.

The following checklist can be used as a guideline to proper

service:

CAUTION

If dirt, rust, soot, or scale accumulations are found,

call your dealer. Do not operate your furnace. Failure

to follow this caution would result in minor property

or product damage.

CAUTION

If the furnace is installed in an unconditioned space

where the ambient temperatures may be 32°F or

lower, freeze protection measures must be taken to

prevent minor property or product damage.

need art

UPFLOW DOWNFLOW

CAUTION

Do not use ethylene glycol (Prestone II antifreeze

coolant or equivalent). Failure of plastic compo-

nents will occur.

•Inspect all ﬂue gas passages, burners, heat exchangers, cou-

pling box(es), and inducer assembly.

•Inspect all combustion-air and vent piping inside structure

and vent pipe termination outside the structure.

•Check gas pipes leading to and inside of your furnace for leaks.

•Inspect and clean the blower motor and wheel.

NOTE: The inducer and blower motors are pre-lubricated and

require no additional lubrication. These motors can be identiﬁed

by the absence of oil ports on each end of the motor.

•Inspect and change or clean air ﬁlters(s) if necessary.

•Inspect all supply- and return-air ducts for obstructions, air

leaks, and insulation. Remedy any problem when necessary.

•Inspect the return-air duct connections(s) at the furnace to en-

sure it is physically sound, sealed to the furnace casing, and

terminates outside the space containing the furnace.

•Inspect electrical wiring, connections, and components for

loose connections.

•Perform an operational checkout to determine whether your

furnace is working properly and if it requires adjustments.

•Inspect all condensate drain tubes and condensate trap assem-

bly for leaks. The condensate removal system should be cleaned

annually by a qualiﬁed service agency. Refer to the Service and

Maintenance Instructions for further information.

•Examine the physical support of the furnace. Support should

be sound with no cracks, sagging, gaps, etc. around the base.

•Check furnace for any obvious signs of deterioration.

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.

NOTE: Record the LED status code BEFORE removing the

blower access door or turning off 115-v power to the furnace.

Removing the blower access door or turning off the 115-v pow-

er will end the LED status code display and erase the code from

the control’s memory.

FOR INSUFFICIENT AIRFLOW:

•Check for dirty air ﬁlter(s).

•Check for blocked return-air or supply-air grilles throughout

your home. Ensure they are open and unobstructed.

If problem still exists, call your dealer for service.

IF FURNACE FAILS TO OPERATE:

Follow this checklist step by step, advancing to the next step

only if furnace fails to start.

•Check thermostat for proper temperature. Is thermostat set

above room temperature?

•Is thermostat set on HEAT?

•Check fuses and circuit breakers. Is electrical supply on?

•Is manual shutoff valve in gas supply pipe in open position?

(Follow start-up procedures if you open gas valve.)

NOTE: Turn off electrical supply before continuing with

checklist.

•Is control switch on gas valve in ON position? (Follow start-

up procedures if you must reset switch to ON position.)

•Check manual reset ﬂame rollout switch located on the burner

box. (See Fig. 2.) if furnace has experienced high temperature

conditions, this switch will shut off the furnace. Reset it by

pushing the button on the switch. If it trips again, shut down the

furnace and call for service. See “Shutting DownYour Furnace”

section in this manual.

•Check for obstructions around the vent termination.

If the furnace still fails to operate, call your service representa-

tive.

For your convenience, record the furnace product and serial

numbers on back page. Should you ever require service, you

will have ready access to the information needed by your ser-

vice representative.

This furnace has a light-emitting-diode (LED) status code dis-

play to aid the installer, service technician, or homeowner while

installing or servicing the unit. The LED code can be seen by

removing the main furnace door and viewing the LED through

the view port in the blower access panel.

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