INDUCED-COMBUSTION
58PAV & 58RAV
GAS FURNACE
! WARNING: If the information in this manual
is not followed exactly, a fire or explosion may
result causing property damage, personal injury or
loss of life.
USER’S INFORMATION MANUAL FOR
THE OPERATION AND MAINTENANCE
OF YOUR NEW GAS-FIRED 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.
• 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.
Do not use this furnace if any part has been under
water. Immediately call a qualified service technician to inspect the furnace and to replace any part
of the control system and gas control which has
been under water.
NOTE TO INSTALLER:
THIS MANUAL MUST BE LEFT WITH THE
EQUIPMENT USER.
WELCOME TO TODAY’S
GENERATION OF
COMFORT
Congratulations! Your new, highefficiency gas furnace is a sound 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 extremely 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 efficiency.
Years went into the development of
your new furnace. Take a little time
now to assure its most efficient operation for years to come.
1
MODEL 58PAV
UPFLOW FURNACE
UPFLOW FURNACE COMPONENTS
1
Relief Box
2
Rating Plate
3
Gas Valve Control Knob or Electric Switch (On/Off)
4
Gas Valve
5
Manual Reset Limit Switch
6
Gas Burner
7
Flame Sensor
8
Hot Surface Ignitor
9
Status LED Light
10
Blower and Blower Motor
11
Draft Safeguard Tube and Switch
12
Gas Manifold
13
Blower Door Safety Switch
14
Filter Retainer
15
Air Filter
1
2
MODEL 58RAV
DOWNFLOW/
HORIZONTAL FURNACE
11
2
3
4
5
6
7
8
9
10
12
13
14
15
3
2
DOWNFLOW/HORIZONTAL FURNACE
COMPONENTS
1
2
3
8
9
10
4
5
11
6
12
7
13
1
Manual Reset Auxiliary Limit Switch (When Used)
2
Blower and Blower Motor
3
Relief Box
4
Gas Valve Control Knob or Electric Switch (On/Off)
5
Gas Valve
6
Gas Burner
7
Rating Plate
8
Draft Safeguard Tube and Switch
9
Gas Manifold
10
Hot Surface Ignitor
11
Manual Reset Limit Switch (2)
12
Flame Sensor
13
Status LED Light
14
Blower Door Safety Switch
14
4
salts, laundry bleaches, detergents, adhesives, paints, varnishes, 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 and
metal vent system 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 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. Immediately call a qualified service technician to
inspect the furnace and to replace any part of the control
system and any gas control which has been under water.
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.
IMPORTANT FACTS
Your furnace must have adequate airflow for efficient combustion and safe ventilation. Do not enclose it in an airtight
room or “seal’’ it behind solid doors.
To minimize the possibility of serious personal injury, fire,
furnace damage, or improper operation, carefully follow
these safety rules:
• Keep the area around your furnace free of combustible
materials, gasoline, and other flammable liquids and vapors.
5
SAFETY CONSIDERATIONS
• 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
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.
3
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 ! . 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.
STEPS FOR STARTING YOUR
FURNACE
1. Set your room thermostat to the lowest temperature setting. (See Fig. 7.)
2. Close the external manual gas valve. (See Fig. 8.)
®
STARTING YOUR FURNACE
7
Instead of a continuously burning pilot flame, 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:
• Never attempt to manually light the burners with a match
or other source of flame.
CL
SE
O
8
9
3. Turn OFF electrical supply to the furnace. (See Fig. 9.)
4. Remove the furnace access door(s).
a. Downflow/Horizontal—Remove blower door after
removing 2 screws first, then remove the control
door. (See Fig. 10.)
b. Upflow—Remove control door. (See Fig. 11.)
6
• Read and follow the operating instructions on the furnace,
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 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 do not light 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.
10
11
5. The gas valve will have EITHER a control knob or control switch to turn off and on. Turn the control knob or
switch on the gas valve to the OFF position and wait
5 minutes. (See Fig. 12 or 13.)
6. After waiting 5 minutes, turn the control knob or switch
on the gas valve to the ON position. (See Fig. 14 or 15.)
7. Replace the access door(s). See Fig. 16 for upflow and
Fig. 17 for downflow. Replace control door first on
downflow furnaces. Replace blower door and secure
with 2 screws.
8. Turn ON the electrical supply to the furnace. (See
Fig. 18.
! WARNING
Should overheating occur or the gas valves fail to
shut off the gas supply, turn off the manual gas
valve (See Fig. 8.) to the furnace BEFORE turning
off the electrical supply. A failure to follow this
warning could result in a fire or explosion, and
personal injury or death.
• Check Air Filter: Before attempting to start your furnace,
be sure the furnace filter is clean and in place. (See the maintenance section of this manual.) Then proceed as follows:
4
OP
EN
OFF
18
12
1
3
2
C
ON
9. Open the external manual gas valve. (See Fig. 19.)
10. Set the room thermostat to a temperature slightly
above the room temperature. This will automatically
signal the furnace to start. The inducer motor will start,
and the hot surface ignitor will energize. When hot, the
ignitor will have an orange glow.
11. After 15 to 70 sec, 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 45 sec, the furnace blower is
switched on.
ON
P
OFF
M
O
F
F
OR
13
NOTE: If the main burners fail to ignite, the furnace control
system will go through 3 more ignition cycles. Then, if burners still 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 be switched on
automatically. When the room temperature reaches the setting selected on the thermostat, the furnace will be automatically switched off.
Some thermostats have a “FAN’’ mode with 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
45-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.
ON
14
C
1
3
2
ON
ON
P
OFF
M
O
F
F
19
OR
15
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 to the lowest temperature
setting. (See Fig. 20.)
2. Close the external manual gas valve (See Fig. 8 on page
4.)
3. Turn OFF electrical power to your furnace. (See Fig. 21.)
16
17
5
! CAUTION
Although special care has been taken to minimize
sharp edges, be extremely careful when handling
parts or reaching into the furnace.
FILTERING OUT TROUBLE
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.
If installed with factory specified disposable media filter,
check or replace filter before each heating and cooling season. Replace disposable media filter at least once a year.
If your furnace filter needs replacing, be sure to use the
same size and type of filter that was originally supplied. Use
the Furnace Filter Table and compare your furnace size with
the proper filter size.
®
20
OFF
! 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.
21
C
ON
1
3
2
ON
P
OFF
M
O
F
F
The air filter for upflow furnaces is normally located in the
blower compartment. Filters for the downflow furnaces are
normally located in the return-air plenum above the blower.
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:
• Upflow Furnaces Only—
1. Turn OFF the electrical supply to the furnace. (See
Fig. 21.)
2. Remove control and blower access doors.
22
OR
23
4. Remove the control access door on your furnace. (See
Fig. 10 or 11.) On upflow furnaces, removing the blower
access door is not required.
5. Turn the control knob or switch on the gas valve to the
OFF position. (See Fig. 22 or 23.)
6. Replace the control access door. (See Fig. 16 or 17.)
7. If the furnace is being shut down because of a malfunction, call your dealer as soon as possible.
24
PERFORMING ROUTINE
MAINTENANCE
25
3. Push filter retainer toward the bracket opening to release
the filter. (See Fig. 24.)
4. Gently remove the filter and carefully turn the dirty side
up (if dirty) to avoid “spilling” dirt from the filter. (See
Fig. 25).
With proper maintenance and care, your furnace will operate
economically and dependably. Basic maintenance, which can
easily be accomplished by someone who follows the directions,
is found on this and the following pages. However, before beginning maintenance, follow these safety precautions:
! WARNING
Turn off electrical power supply to your furnace
before removing the access doors to service or
perform maintenance. A failure to follow this
warning could result in personal injury or death.
26
6
5. Inspect the filter. If torn, replace the filter.
6. Wash the 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
the filter in the opposite direction of airflow. Allow filter
to dry.
7. Reinstall the clean filter.
8. Put filter retainer back in the bracket opening and lock it
in place.
9. Replace blower and control access doors and turn ON
electrical power to your furnace. (See Fig. 16, 17, and 26.)
NOTE: For upflow models only—if side return ducts are used,
2 filters may be required in some models. The procedure listed
above may be used to remove side filters.
• Downflow/Horizontal Furnaces Only:
Two filters are located in the return-air plenum above the
blower (above line-of-sight) resting in the V-shaped channel
on top of the furnace. (See Fig. 27.)
1. Turn OFF electrical supply to the furnace. (See Fig. 21.)
2. Remove 2 screws from blower access door and remove
the door.
3. Remove the left-side filter by tipping the filter toward
the center and raising it from the V-shaped channel in
which it rests. (See Fig. 27 and 28.)
4. Lower filter down along side of the blower and remove
from the furnace.
5. To remove the right-side filter, lift from V-shaped channel
and remove through left side the same way as left-side filter.
6. Inspect the filter. If torn, replace the filter.
7. Wash the 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 the filter in opposite direction of airflow. Allow
filter to dry.
8. Reinstall the clean filters.
27
UPFLOW FURNACE FILTER TABLE
FURNACE
CASING
WIDTH (IN.)
Side Return
Bottom Return
FILTER
TYPE
14-3/16
(1) 16 x 25 x 1*
(1) 14 x 25 x 1
Cleanable
17-1/2
(1) 16 x 25 x 1*
(1) 16 x 25 x 1
Cleanable
(1) 16 x 25 x 1
(1) 20 x 25 x 1*
Cleanable
(1 or 2) 16 x 25 x 1 (1) 24 x 25 x 1*
Cleanable
21
24-1/2
FILTER SIZE (IN)
DOWNFLOW/HORIZONTAL
FURNACE FILTER TABLE
FILTER
CASING WIDTH
FILTER
SIZE (IN)
FILTER
TYPE
14-3/16
(2) 16 x 20 x 1*
Cleanable
17-1/2
(2) 16 x 20 x 1*
Cleanable
21
(2) 16 x 20 x 1*
Cleanable
24-1/2
(2) 16 x 20 x 1*
Cleanable
* Factory provided with the furnace. Filters may be field modified by cutting
to size. Alternate sizes and additional filters may be ordered from your dealer.
! CAUTION
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. Failure to follow this caution could result
in personal injury.
COMBUSTION AREA AND
VENT SYSTEM
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. 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 electrical supply to the furnace and remove
the access doors. (See Fig. 9, and 10 or 11.)
2. Carefully inspect the gas burner for dirt, rust, or scale
(see Fig. 29). Inspect the relief box, flue connection
area, and the vent pipe for rust.
28
9. Replace blower door and secure with 2 screws. Turn
on electrical power to your furnace.
29
7
NOTE: If dirt, rust, soot, or scale accumulations are found, call
If the switch trips a second time, turn off the furnace and call
for service.
• Downflow/Horizontal Only—Check the manual reset auxiliary limit switch (when used) located on the blower housing.
If the blower motor fails, this switch will shut off the furnace.
Reset it by pushing the button on the switch. If it trips again,
turn off the furnace and call for service.
• Check the manual reset flame rollout switch(es) located near
the burners. If the furnace has experienced a high-temperature
condition due to inadequate combustion air, these switches will
shut off the furnace. Reset the switch(es) 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 for troubleshooting and repairs. Tell your dealer the model
and serial numbers for your furnace. (You should have them
recorded on page 8 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.
your servicing dealer. DO NOT OPERATE THE FURNACE.
! WARNING
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. A failure to follow this
warning could result in personal injury or death.
3. Inspect the vent pipe for a sag, holes, or a disconnection.
A horizontal vent pipe must slope upward. If rusty joints
or seams, or signs of water leakages are found,
call your dealer for service.
4. Replace the access doors and restore electrical power
to the furnace. Be sure bottom door flange is inside of
the furnace casing. (See Fig. 16, 17 and 26.)
5. 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.
Regular dealer maintenance
In addition to the type of routine maintenance you might be
willing to do, your furnace should be inspected regularly by a
properly trained service technician. An annual inspection (or
biennial inspection, at least) should include the following:
1. Inspection of all flue product passages—including the
burners, heat exchanger, relief box, and vent pipe.
2. Inspection of all combustion and ventilation air
passages and openings.
3. Close check of all gas pipes leading to (and inside of) your
furnace.
4. Inspection, cleaning, and lubrication (when required) of
the blower motor and wheel.
NOTE: Refer to the unit Service Procedures for blower motor
oiling information. When required, the motor must be oiled by
a qualified service technician.
5. Routine inspection and cleaning/replacement of the air filter.
6. Inspection of all supply- and return-air ducts for obstructions, air leaks, and insulation. Any problems found should
be resolved at this time.
7. Inspection of furnace installation for proper support and any
obvious deterioration of the furnace. The support must be
sound and without sags, gaps, cracks, etc., around the furnace base so as to provide an air seal between the support
and furnace.
8. A check for loose connections attaching individual components. Inspection of all electrical wiring and their connections.
9. Operational check of the furnace itself to determine working
condition. Repair or adjustment should be made at this time.
Ask your servicing dealer for further details about an economical service contract that covers seasonal inspections.
BEFORE YOU REQUEST A
“SERVICE CALL’’
Before you call for service, check for several
easily solved problems:
• 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:
• Is your thermostat set above room temperature? Is the
HEAT mode selected?
• 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?
• 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 doors.
• Is the control knob or 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
startup procedures found on pages 4 and 5 of this booklet.
• If for some reason the vent is blocked, the draft safeguard
switch will shut off the furnace. Reset the switch by pushing
the button located on top of the switch. See page 2 or 3 for
switch location.
8
9
10
11
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.
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 2000 Carrier Corporation
Form: OM58-94
Replaces: OM58-78
Printed in the U.S.A. a
9-00
PC 101
Catalog No. 535-779