Carrier 58EFB Guide

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USER’S INFORMATION MANUAL FOR THE OPERATION
AND MAINTENANCE OF YOUR NEW GAS-FIRED FURNACE
NOTE TO INSTALLER:
THIS MANUAL MUST BE
LEFT WITH THE
EQUIPMENT USER.
HORIZONTAL INDUCED-COMBUSTION 58EFB
GAS FURNACE
a
— Do not store or use gasoline or other flam-
mable 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.
• 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: If the information in this manual
is not followed exactly, a fire or explosion may
result causing property damage, personal in-
jury or loss of life.

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WELCOMETO A NEW GENERATION
OF COMFORT
Congratulations!Yournew80%* efficientgasfurnaceis asound
investment which will reward you and your family with years of
“warm memories” winter after winter.
Not only is your new furnace energy efficient, it is also one of
the most reliable. Spend just a few minutes with this booklet to
learn about the operation of your new furnace—and the small
amount of maintenance it takes to keep it operating at peak effi-
ciency. Years went into the development of your new furnace.
Take a little time now to assure its most efficient operation for
years to come.
* The output capacity and any representations of efficiency for this furnace are based on standard Depart-
ment of Energy test procedures.
INSTALLATION DATA
Date Installed
Dealer Name
Address
City
State Zip
Telephone
FURNACE
Product No.
Model No.
Serial No.
SPLIT-SYSTEM
OUTDOOR UNIT:
Product No.
Model No.
Serial No.
INDOOR COIL:
Product No.
Model No.
Serial No.
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MODEL 58EFB HORIZONTAL FURNACE

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HORIZONTAL FURNACE COMPONENTS
Primary serpentine heat exchanger. Stretches fuel dollars
with the S-shaped heat flow design. Solid construction of
corrosion-resistant aluminized steel means reliability.
Burner assembly (inside). Operates with energy-saving
pilot, inshot burners, and hot surface igniter for safe,
dependable heating.
Gas valve — ignition module assembly. Safe, efficient.
Features 2 separate gas shutoff valves and integrated ig-
nition control.
Heavy-duty blower. Circulates air, scrubbing the heat ex-
changers to transfer heat into the home.
Air filter and wire filter retainer (optional).
Inducer motor. Pulls hot flue gases through the heat ex-
changers, maintaining negative pressure for added safety.
Vent outlet. Carries vent gases from the home.
Limit switch. Shuts furnace down in the event of an over-
heating condition.
Pressure switch. Ensures adequate flow of flue products
through furnace and out vent system.
Control center.
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2
3
4
5
6
7
8
9
10
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MODEL 58EFB HORIZONTAL FURNACE
(Unit Shown In Horizontal Left Configuration)
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2
8
1
7
35
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6
9
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IMPORTANT FACTS
Your furnace must have adequate airflow for efficient combus-
tion and safe ventilation. Do not enclose it in an airtight room or
“seal” it behind solid doors.
3
To minimize the possibility of serious personal injury, fire, dam-
age to your furnace, or improper operation,
carefully follow
these safety rules:
• Keep the area around your furnace free of combustible mate-
rials, 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.
• A furnace installed in an attic or other insulated space must be
kept free and clear of insulating material. Examine the furnace
area when installing the furnace or adding more insulation.
Some materials may be combustible.
NOTE:
Do not use this furnace if any part has been under water.
Immediatelycalla qualified service techniciantoinspectthefur-
nace and to replace any part of the control system and any gas
control which has been under water.
4
NOTE:
The qualified installer or agency must use only factory-
authorized replacement parts, kits, and accessories when modi-
fying this product.
If the furnace is left unattended for an extended period of time,
have it checked periodically for proper operation. This precau-
tion will prevent problems associated with NO HEAT, such as
frozenwaterpipes, etc.See “BeforeYouRequesta ServiceCall”
section in this manual.
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 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
.Whenyousee this symbolon the furnaceand in instructions
or manuals, be alert to the potential for personal injury.
Understand the signal words DANGER,WARNING, and CAU-
TION.Thesewordsareusedwiththesafety-alert symbol.DAN-
GER 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.
STARTINGYOUR FURNACE
Insteadof acontinuously burningpilot flamewhich wastesvalu-
able energy, your furnace uses an automatic, hot surface ignition
system to light the pilot each time the thermostat starts your fur-
nace.
Follow these important safeguards:
• Never attempt to light the pilot manually with a match or
other source of flame.
5
• Read and follow the operating instructions on the furnace, es-
pecially the item that reads as follows:
Wait 5 minutes to clear out any gas. Then smell for gas, in-
cluding near the floor. If you smell gas,
STOP!
Follow “B” in
thesafety information above onthis furnace label. If you don’t
smell gas, go to the next step.
• If a suspected malfunction occurs with your gas control sys-
tem, such as the burners not lighting when they should, refer to
the shutdown procedures on the furnace or in the next section to
turn off your system, then call your dealer as soon as possible.
•
CHECK AIR FILTER:
Before attempting to start your fur-
nace, be sure the furnace filter is clean and in place. (See the
maintenance section of this manual.) Then proceed as follows:
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OFF
WARNING
If overheating occurs, or the gas valve fails to shut
off the gas supply, turn off the manual gas valve (see
Fig. 7) to the furnace BEFORE turning off the electri-
cal supply. Failure to follow this warning could result
in a fire or explosion, and personal injury or death.
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STEPS FOR STARTINGYOUR FURNACE
1. Set your room thermostat to the lowest temperature setting.
(See Fig. 6.)
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2. Close the external manual gas valve. (See Fig. 7.)
3. Turn off the electrical supply to the furnace. (See Fig. 8.)
78
4. Turn the switch on the gas valve to the OFF position and
wait 5 minutes. (See Fig. 9.)
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5. After waiting 5 minutes, turn the switch on the gas valve to
the ON position. (See Fig. 10.)
6. Turn on the electrical supply to the furnace. (See Fig. 11.)
7. Open the external manual gas valve. (See Fig. 12.)
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11 12
8. Set the room thermostat to a temperature slightly aboveroom
temperature. This will automatically signal the furnace to
start. The inducer motor will start, the pressure switch will
close, and the hot surface igniter will be energized.
9. The hot surface igniter will light the pilot flame. Once the
pilot flame is sensed, 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 approx-
imately 30 sec, the furnace blower is switched on.
If the pilot fails to light, the ignitor remains energized, and pilot
gas valve remains open. If this is due to a gas interruption, the
system continues its attempt to light pilot until gas is restored
and unit lights or system is turned off.
10. Set your thermostat to the temperature that satisfies your
comfort requirements. SUGGESTION: Setting the thermo-
stat back a few degrees and compensating for the difference
withwarmer clothing can makea big differencein 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 room temperature drops below the temperature se-
lected on the thermostat, the furnace will be switched on
automatically. When room temperature reaches the degree
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 to AUTO, the furnace blower cycles on
and off, controlled by the thermostat. In ON mode, the fur-
nace blower runs continuously except for a 30-sec delay at
the call for heat. This keeps the temperature level in your
home more evenly balanced. It also continuously filters the
indoor air.
SHUTTING DOWNYOUR 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 to the lowest temperature setting.
(See Fig. 13.)
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2. Close the external manual gas valve. (See Fig. 7.)
3. Turn off the electrical power to your furnace. (See Fig. 14.)
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4. Turn the switch on the gas valve to the OFF position. (See
Fig. 15.)
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5. If the furnace is being shut down because of a malfunction,
call your dealer as soon as possible.
PERFORMING ROUTINE MAINTENANCE
With proper maintenance and care, your furnace will operate
economically and dependably. Instructions for basic mainte-
nance are found on this and the following pages. However, be-
fore beginning maintenance, follow these safety precautions:
FILTERING OUTTROUBLE
(Optional Accessory)
A dirty filter will cause excessive stress on the furnace blower
motor and can cause it to overheat and automatically shut down.
The furnace filter should be checked every 3 or 4 weeks and
cleaned if necessary.
The air filter is normally located in the blower compartment be-
fore the blower (See Fig. 17.) If the filter(s) has been installed in
anotherlocation, contact your dealer for instructions.Toinspect,
clean, and/or replace the air filter(s), follow these steps:
Ifyourfurnace filterneeds tobereplaced, besureto usethesame
size and type of filter that was originally supplied. Use the fur-
nace filter table and compare your furnace size with the proper
filter size.
HORIZONTAL FURNACE FILTERTABLE
• REMOVE THE FILTER FOR CLEANINGAS FOLLOWS:
1. Turn off electrical supply to the furnace. (See Fig. 14.)
2. Remove blower access door located at the inlet (return-air)
end of the furnace (4 screws must be removed).
(See Fig. 16.)
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3. Bend the formed wire filter retainer to clear the furnace
flange at 1 side.
4. Pivot the filter retainer toward the blower. (See Fig. 17.)
5. Remove the filter from the furnace.
6. Inspect the filter. If torn, replace it.
7. Wash the filter (if dirty) in a sink, bathtub, or outside with a
garden hose. Always use cold tap water. A mild liquid de-
tergent may be used if necessary. Spray water through the
filter in the opposite direction of airflow through the cross-
mesh binding side.Allow filter to dry.
WARNING
Turn off electrical power supply to your furnace be-
fore removing the access doors to service or perform
maintenance. Failure to follow this warning could re-
sult in personal injury or death.
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!
CAUTION
Although special care has been taken to minimize
sharp edges, be extremely careful when handling
parts or reaching into the furnace.
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.
HORIZONTAL
FURNACE INPUT
(BTUH)
FILTER
SIZE
(IN.) FILTER TYPE
50,000 (1) 13 x 23 x 1/2 Cleanable
75,000 (1) 13 x 23 x 1/2 Cleanable
100,000 (1) 16-1/2 x 23 x 1/2 Cleanable
125,000 (1) 20 x 23 x 1/2 Cleanable
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8. Reinstall the clean filter with the cross-mesh binding side
facing the furnace blower.
9. Replace blower door, reinstall 4 screws (see Fig. 18), and
turn on electrical power to your furnace.
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COMBUSTION AREA ANDVENT SYSTEM
Visually inspect the combustion area and vent system before
each heating season. Make sure that the pipe leading into the
vent is free from any cracks and sags. Also check the vent pipe
on the outside of your home for blockage.
When dirt, soot, or rust is allowed to build up, your furnace can
suffer a loss of efficiency and perform improperly. Accumula-
tions on the main burners can result in their firing out of normal
sequence. This delayed ignition will create an alarmingly 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 electrical supply to your furnace. (See Fig. 14.)
2. Remove burner enclosure front.
Inspect the gas burners for dirt, rust, soot, or scale. (See Fig. 19.)
Then inspect the vent outlet area and vent pipe.
19 20
3. Inspect the vent pipe for sags, holes, cracks, or disconnec-
tions. Any horizontal vent pipe must slope upward, away
from the furnace. If rusty joints or seams, or signs of water
leakage are found, call your dealer for service.
4. Reinstall the burner enclosure front.
5. If your furnace is free of the above conditions, restore elec-
trical power to your furnace. (See Fig. 11.)
6. Start your furnace and observe its operation. Watch the
burner flames to see if they are clear blue, almost transpar-
ent. (See Fig. 20.) If you observe a suspected malfunction,
or the burner flames are not clear blue, call your dealer.
A CHECK-UP CHECKLIST
Your furnace represents an important investment in your fam-
ily’s comfort and your home’s value.To keep it in tip-top shape
and as a preventative to 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:
• Inspect all flue gas passages, burners, heat exchangers, and
inducer assembly.
• Inspect all combustion and ventilation air passages and open-
ings, including vent pipe terminations outside the structure.
• Check gas pipes leading to and inside of your furnace for
leaks.
• Inspect, clean, and lubricate the blower motor and wheel as
required.
NOTE:
If oil ports are provided, refer to the unit Service and
Maintenance Instructions for blower motor oiling information.
The motor must be oiled by a qualified service technician.
• Inspect and change or clean air filter(s) if necessary.
• Inspect all supply- and return-air ducts for obstructions, air
leaks, and insulation. Remedy any problem when necessary.
• 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.
CAUTION
If your furnace makes an especially loud noise when
the main burners light, shut down your furnace and
call your dealer.
CAUTION
If dirt, rust, soot, or scale accumulations are found,
call your dealer. Do not operate your furnace.
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!
DANGER
If holes are found in the vent pipe, or if it has become
disconnected, toxic fumes can escape into your
home. DO NOT OPERATE YOUR FURNACE. Call
your dealer for service.
!

TO OBTAIN INFORMATION ON PARTS: Consult your installing dealer or the classified section of your local telephone directory under the
“Heating Equipment’’ or “Air Conditioning Contractors & Systems’’ heading for dealer listing by brand name.
Have available the Model No., Series Letter, & Serial No. of your equipment to ensure correct replacement part.
Carrier Corporation 7310 West Morris St. Indianapolis, IN 46231
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations .
Copyright 1998 Carrier Corporation Form: OM58-89 Replaces: OM58-77 Printed in the U.S.A. a6-98 PC 101 Catalog No. 535-700
• Examine the physical support of the furnace; the support
should be sound with no cracks, sagging, gaps, etc. around the
base.
• Check the furnace for any obvious signs of deterioration.
•Your servicing dealer offers an economical service agreement
that covers seasonal inspections; ask for details.
BEFOREYOU 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.
FOR INSUFFICIENTAIRFLOW:
•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 1 only
if furnace fails to start.
•Check thermostat for proper temperature (set above room
temperature).
•Is the thermostat set on HEAT?
•Check fuses and circuit breakers. Is electrical supply on?
•Is the manual shutoff valve in gas supply pipe in open posi-
tion? (Follow start-up procedures if you open gas valve.)
NOTE: Turn off the electrical power supply before continuing
with checklist.
•Is the switch on gas valve in ON position? (Follow start-up
procedures if you must reset knob to ON.)
•Check the manual reset flame rollout switch located on the
burner assembly. (See Fig. 2.) If the furnace has experienced
high temperature conditions, this switch will shut off the fur-
nace. 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 your furnace still fails to operate, call your service represen-
tative.
Foryour convenience,record the product and serial numbers on
the form on page 2. Should you ever require service, you will
have ready access to the information needed by your service
representative.