American Standard Noncondensing Gas Furnaces User Manual
User’s Information Guide
32- 5034- 2
Noncondensing Gas Furnaces
Upflow / Horizontal and Downflow / Horizontal
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.
— 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 per-
formed by a qualified installer, service
agency or the gas supplier.
© American Standard Inc. 2001
WARNING: Disconnect power to the
unit before removing the blower door. Failure to
follow this warning could result in property damage,
personal injury or death.
▲
WARNING:
HIGH VOLTAGE ELECTRICAL COMPONENTS, FAST MOVING FANS,
AND COMBUSTIBLE GAS. FOR PROTECTION FROM THESE
INHERENT HAZARDS DURING INSTALLATION AND SERVICING,
THE ELECTRICAL SUPPLY MUST BE DISCONNECTED AND THE
MAIN GAS VALVE MUST BE TURNED OFF. IF OPERATING CHECKS
MUST BE PERFORMED WITH THE UNIT OPERATING, IT IS THE
TECHNICIANS RESPONSIBILTY TO RECOGNIZE THESE HAZARDS
AND PROCEED SAFELY.
▲
WARNING:
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.
BODILY INJURY CAN RESULT FROM
DO NOT USE THIS UNIT IF
Pub. No. 32-5034-02
WARNING:
FIRE OR EXPLOSION HAZARD
Failure to follow the safety warnings exactly could
result in serious injury, death or property damage.
Improper servicing could result in dangerous operation, serious injury, death, or property damage.
Never store gasoline, combustible materials, or other
flammable liquids or vapors near your furnace.
If you have a problem, check the "Problem Solver" section
of this manual before you call for a possibly unneeded
service call.
Parts and controls of this furnace are unique. Should
service or modification be required, be sure your servicer
uses only factory authorized parts, kits, or accessories for
this furnace.
GENERAL INFORMATION
WARNING: Improper installation, adjustment, alteration, service or maintenance can cause injury
or property damage. Refer to the installation instructions provided with the furnace and this
manual. For assistance or additional information
consult a qualified installer, service agency or the
gas supplier.
This information is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience. Any attempt to repair a central air conditioning product may result in personal injury and/or property damage. American Standard Inc. or seller cannot be
responsible for the interpretation of this information, nor
can it assume any liability in connection with its use.
Safety signal words are used to designate a degree or
level of seriousness associated with a particular hazard.
The signal words for safety markings are DANGER,
WARNING, and CAUTION.
a. DANGER indicates an imminently hazardous
situation which, if not avoided, will result in death
or serious injury. This signal word is limited to the
most extreme situations.
b. WARNING indicates a potentially hazardous situa-
tion which, if not avoided, could result in death or
serious injury.
c. CAUTION indicates a potentially hazardous situa-
tion which, if not avoided, may result in minor or
moderate injury. It is also used to alert against
unsafe practices and hazards involving only property damage.
There must be a free flow of fresh air sufficient for efficient
combustion and safe ventilation of your furnace. Do not
allow the louvers on the front panels of your furnace to
become blocked as this will restrict the flow of fresh air.
The combustion air for your furnace must be fresh uncontaminated air. Paints, varnishes, laundry bleaches, detergents, many household cleaners, water softening salts,
adhesives, and all such products release fumes containing
compounds which could lead to early heat exchanger and
vent system deterioration. Do not store these type of
products near your furnace and consider fresh air for your
furnace during construction or remodeling.
WARNING:
These furnaces are not approved or intended for
installation in manufactured (mobile) housing, trailers,
or recreational vehicles. Failure to follow this warning
could result in property damage, personal injury, or
death.
WARNING:
Do not touch igniter. It is extremely hot. Failure to
follow this warning could result in severe burns, other
injury, property damage, or death.
CAUTION:
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dangerous operation.
Verify proper operation after servicing.
WARNING:
CARBON MONOXIDE POISONING HAZARD
Failure to follow the installation and operation instructions for the venting system's operation could result in
carbon monoxide poisoning or death.
Page 2 Pub. No. 32-5034-02
Filter maintenance reduces energy use.
How to remove your filter.
WARNING: Disconnect power to the
unit before removing the blower door. Failure to
follow this warning could result in property damage,
personal injury or death.
A clean filter saves money.
When the furnace circulates and filters the air in your
home, dust and dirt particles build up on the filter.
Excessive accumulation can block the airflow, forcing
the unit to work harder to maintain desired temperatures.
And the harder your unit has to work, the more energy
it uses. So you pay more any time your system is running with a dirty filter.
CAUTION: Never operate your unit for either
heating or cooling with filters removed.
Help ensure top efficiency by cleaning the filter once a
month. If you have an upflow furnace, you can wash or
WARNING: Disconnect power to the
unit before removing the blower door. Failure to
follow this warning could result in property damage,
personal injury or death.
The upflow furnace blower door has a hinge at the
bottom which allows the door to tilt forward for filter
servicing or replacement without the door being removed. The furnace filter in the bottom or side configuration can be removed by simply turning the two latches
on the blower door 1/4 turn and tilting the door forward.
change the filter once a month. Clean it twice a month
during seasons when the unit runs more often.
Your furnace came from the factory with a cleanable
filter. You can clean the filter with a vacuum, OR you
can wash it with a household detergent. Good quality,
high velocity filters may be used for replacements in
upflow furnaces.
With the new patented filter rack on the upflow models,
all cleaning or replacing of filters is quick and easy.
Clean filters guarantee optimum performance of your
system.
Replacing your filter.
When replacing your furnace filters, use a high velocity
type filter. On upflow furnaces, standard size 1" thick
high velocity filters will fit into the patented filter rack
which will automatically adjust in width to fit. Filters
are available from your dealer.
Blower Door Hinge and Bottom Filter Rack Installation
The blower door may be removed if necessary by tilting the
door outward 2 to 3 inches, then pulling up. The door will
slide out of the hinge for removal. For replacement, simply
insert the blower door bottom into the space between the
furnace base front and the hinge, then tilt inward and
latch.
Typical Upflow Right Side Return Filter Installation
Pub. No. 32-5034-02 Page 3
Filter Rack Assembly
The filter rails are spring loaded for automatic adjustment
to allow standard size, locally obtainable replacement
filters. The filter rack itself slides to adjust to the required
width needed for bottom or side return. Always insert the
chamfer (angle edged sides) end first.
Air filters may also be located outside of the furnace
using a SIDE FILTER FRAME.
UPFLOW ONLY
Upflow / Horizontal Furnace Filters
The Upflow/Horizontal furnace, when installed horizontally, requires a horizontal filter kit. The filters may be
located remote to the furnace or in the return air duct near
the furnace. Check with your dealer for the location
of your filters.
An upflow/horizontal furnace in horizontal return air filter
application, as shown, features two 14" x 20" x 1" filters in
the 14-1/2" wide furnace cabinets; or two 16" x 20" x 1"
filters in the 17-1/2", 21", and 24-1/2" wide furnace cabinets.
CHAMFER
END OF
FILTER GOES
INTO FILTER
RACK FIRST
The furnace filter may be secured with filter retaining
brackets for right side return on smaller furnaces. To
replace filters on these furnaces, remove the blower
access door, push back to flex the filter and clear the
filter retaining bracket at the front of the unit. Gently
pull the filter out. After cleaning, replace the filter in
the same manner making sure that filter is secured in
place in both front and back filter retaining brackets of
the unit. Replace blower access door.
To replace filters, remove the filter access door, lift the
filter from the lower bracket and shift the filter to the side
to free the top filter from the bracket and slide the filters
out through the filter access door. After cleaning, replace
the filters in the same manner making sure that the filters
are secured in place in both top and bottom filter brackets.
UPFLOW/HORIZONTAL WITH FILTER KIT
Replace filter access door.
Air filters may also be located outside of the furnace using
a remote filter grille. The filter grille could be in a hallway,
wall, or in the ceiling. Check with your dealer for the exact
location of your filter and the method of changing the
filters.
Page 4 Pub. No. 32-5034-02
FACTORY SUPPLIED UPFLOW FURNACE
RETURN AIR FILTERS
UPFLOW FURNACE RETURN AIR FILTERS
CABINET
WIDTH
14-1/2" 1 14" X 25" X 1" 17-1/2" X 25" X 1"
17-1/2" 1 17" X 25" X 1" 17-1/2" X 25" X 1"
21" 1 20" X 25" X 1" 17-1/2" X 25" X 1"
24-1/2" 1 24" X 25" X 1" 17-1/2" X 25" X 1"
*NOTE - On 5 or 6 ton airflow models, if the airflow
requirement exceeds 1800 CFM, these models will require
filters on
bottom.
QTY*
both
sides; OR 1 side
CABINET
BOTTOM FILTER
and
the bottom; OR just the
CABINET
SIDE FILTER
WARNING: Disconnect power to the
unit before removing the blower door. Failure to
follow this warning could result in property damage,
personal injury or death.
A downflow/horizontal furnace with horizontal return air
filter application, as shown, features two 14" x 20" x 1"
filter in the 14-1/2" wide furnace cabinets; or two 16" x 20"
x 1" filter in the 17-1/2", 21", and 24-1/2" wide furnace
cabinets.
DOWNFLOW/HORIZONTAL FILTER
DOWNFLOW FILTER TABLE
Downflow Furnace Filters
Downflow/Horizontal furnaces use 2 standard size permanent type air filters which may be located remote to the
furnace or in the return air duct. Check with your dealer
for the location of your filters.
A downflow/horizontal furnace vertical return air filter
application, as shown, features two 14" x 20" x 1" filter in
the 14-1/2" wide furnace cabinets; or two 16" x 20" x 1" filter
in the 17-1/2", 21", and 24-1/2" wide furnace cabinets.
REQUIRED FILTERS - DOWNFLOW
CABINET WIDTH FILTER QUANTITY & SIZE
14-1/2" 2 - 14" X 20" X 1"
17-1/2" 2 - 16" X 20" X 1"
21" 2 - 16" X 20" X 1"
24-1/2" 2 - 16" X 20" X 1"
DOWNFLOW FILTER
Pub. No. 32-5034-02 Page 5
The problem solver.
A furnace is not a household appliance. It is complex and
requires professional maintenance and repair.
That’s why attempts at “do-it-yourself” repairs on an inwarranty unit may void the remainder of your warranty.
Other than performing the simple maintenance recommended in this manual, you should not attempt to make
any adjustments to your furnace. Your dealer will be able
to take care of any questions or problems you may have. A
periodic inspection of your furnace should be made by a
qualified service agency at the start of each heating season.
Keep your furnace looking like new for years.
Clean the enamel finish of your furnace with ordinary soap
and water. For stubborn grease spots, use a household
detergent. Lacquer thinner or other synthetic solvents may
damage the finish.
Save time and money. Before calling for service, check the following:
Problem Possible Trouble Possible Remedy
No Heating - Blower 1. Thermostat set incorrectly. 1. Adjust thermostat See operating
Does not operate instructions
2. Blown fuse or tripped circuit breaker. 2. Replace or reset protective device
3. Defective component. 3. Most controls are automatic and will
4. Burner does not ignite. 4. Call servicer.
5. Main gas line turned off. 5. Have gas company check.
6. Blower door removed or ajar. 6. Close door securely to restore power
7. Lockout 7. Turn power on-off-on-off twice
Insufficient Heating - 1. Dirty air filters. 1. Clean or replace filters.
Blower operates
continuously 2. Blocked supply or 2. Make sure registers are open and
return registers. No obstacles blocking off the air.
No Heat - Vent motor Restricted or plugged furnace 1. Remove drain clamps to condensate
is running condensate drain. trap and drain pan outlet
Unusual Noise Call your servicer
WARNING:
Do not touch igniter. It is extremely hot. Failure to
follow this warning could result in severe burns, other
injury, property damage, or death.
CAUTION:
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dangerous operation.
Verify proper operation after servicing.
or call for servicer.
recycle. If your unit still does not
operate call for servicer.
to blower and gas valve.
in 30 secs.
2. Flush or clear drain blockage.
3. Reinstall clamps.
WARNING:
CARBON MONOXIDE POISONING HAZARD
Failure to follow the installation and operation instructions for the venting system's operation could result in
carbon monoxide poisoning or death.
Page 6 Pub. No. 32-5034-02
Maintenance information.
Never stop the cooling system by shutting off the
main power.
If the main power to your air conditioner is ever disconnected for more than three hours, turn off the thermostat.
Then wait for at least three more hours after the power has
been restored before turning the thermostat back on.
Failure to follow this procedure could result in damage to
your air conditioning system.
1. GENERAL INSPECTION - Examine the furnace installation for the following items:
a. All flue product carrying areas external to the furnace (i.e. chimney, vent connector) are clear and free of
obstruction.
b. The vent connector is in place, slopes upward and is
physically sound without holes or excessive corrosion.
c. The return air duct connection(s) is physically sound,
is sealed to the furnace and terminates outside the
space containing the furnace.
d. The physical support of the furnace should be sound
without sagging, cracks, gaps, etc., around the base so
as to provide a seal between the support and the base.
e. There are no obvious signs of deterioration of the
furnace.
WARNING:
NOTE: On LP (propane) units, some light yellow tipping of
the outer mantle is normal. Inner mantle should be bright
blue.
Natural gas units should not have any yellow tipped
flames. This condition indicates that a service call is
required. For best operation, burners must be cleaned
annually using brushes and vacuum cleaner.
NOTE: On LP (propane) units, due to variations in BTU
content and altitude, servicing may be required at shorter
intervals.
Do not touch igniter. It is extremely hot. Failure to
follow this warning could result in severe burns.
2. BLOWERS - The blower size and speed determine the
air volume delivered by the furnace. The blower motor
bearings are factory lubricated and under normal operating conditions usually do not require servicing. Annual
cleaning of the blower wheel and housing is recommended
for maximum air output, and this must be performed only
by a qualified servicer or service agency.
3. IGNITER - This unit has a special hot surface direct
ignition device that automatically lights the burners. Please
note that it is very fragile and should be handled with care.
CAUTION: Do not touch igniter. It is extremely hot.
4. BURNER - Gas burners do not normally require scheduled servicing, however, accumulation of foreign material
may cause a yellowing flame or delayed ignition. Either
condition indicates that a service call is required. For best
operation, burners must be cleaned annually using brushes
and vacuum cleaner.
Turn off gas and electric power supply. To clean burners,
remove top burner bracket and lift burner from orifice.
NOTE: Be careful not to break igniter when removing burners. Clean burners with brush and/or vacuum
cleaner. Reassemble parts by reversal of the above procedure.
Pub. No. 32-5034-02 Page 7
5. HEAT EXCHANGER / FLUE PIPE - These items must
be inspected for signs of corrosion, and/or deterioration at
the beginning of each heating season by a qualified service
technician and cleaned annually for best operation.
6. CIRCUIT PROTECTION - If blower or gas valve fail to
operate, the cause could be the circuit breaker or a loose or
blown fuse. Replace fuse or reset circuit breaker.
7. OPERATION - Your warm air furnace should not be
operated in a corrosive atmosphere. Paint solvents, cleaning chemicals, spray propellants, and bleaches should not
be used in the vicinity of the furnace during normal
operation.
8. COOLING COIL CONDENSATE DRAIN - If you have
a cooling coil installed with your furnace, condensate
drains should be checked and cleaned periodically to assure that condensate can drain freely from coil to drain. If
condensate cannot drain freely water damage could occur.
9. AIR CIRCULATION - To ensure increased comfort,
blower on this unit may be operated continuously for both
heating and cooling. This will result in constantly filtered
air and aid in maintaining more even temperatures by
avoiding temperature stratification throughout the conditioned area. To accomplish constant air circulation, set
your thermostat fan switch to "ON".
WARNING: Disconnect power to the
unit before removing the blower door. Failure to
follow this warning could result in property damage,
personal injury or death.
▲
WARNING:
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.
For your safety.
Furnace area must be kept clear and free of combustible
materials, gasoline, and other flammable vapors and liquids.
Air for combustion and ventilation.
The flow of combustion and ventilating air must not be
obstructed from reaching the furnace. Air openings provided in the casing of furnace must be kept free of obstructions which would restrict airflow, thereby affecting efficiency and safe operation of your furnace.
Also, air openings provided to the area in which the
furnace is installed and the space around the furnace shall
not be blocked or obstructed. Keep this in mind should you
choose to remodel the area which contains your furnace.
Furnaces must have air for proper performance.
If additional insulation is added after the furnace is installed, the area around the furnace must be inspected to
ensure it is free and clear of insulation. If this furnace is
installed in an attic or other insulated space it must be kept
free and clear of all insulating materials as some insulating materials are combustible.
DO NOT USE THIS UNIT IF
Manual Main Gas Shut-off Valve May Be
Located on the Left or Right Side
Manual Main Gas Shut-off Valve May Be Located on the Top or Bottom Side
NOTE THE LOCATION OF THE MANUAL MAIN GAS SHUTOFF VALVE FOR YOUR FUR-
NACE.
Have your installer or servicer show you the location if you have any questions.
Page 8 Pub. No. 32-5034-02
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