Trane TUH2 Owner's manual

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IIIIIIIIIIIIIIII IIIIIIII
32- 5035- 05
Condensing Gas Furnaces
Fan Assisted Combustion System
Upflow/Horizontal and Downflow/Horizontal
IMPORTANT: Users MUST read all instructions in the manual. All manuals MUST be kept for future reference.
SAFETY SECTION
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 WARNING
and CAUTION.
a. WARNING indicates a potentially hazardous situa-
tion which, if not avoided, could result in death or
serious injury.
b. CAUTION indicates a potentially hazardous situation
which, if not avoided, may result in minor or mod-
erate injury. It is also used to alert against unsafe
practices and hazards involving only property dam-
age.
Contents
Safety Section
General Information
To Start the Furnace
Proper Maintenance
The Problem Solver
Regular Dealer Maintenance
Warranty
If the information in this manual is not followed exactly,
afire 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 or combustible materials 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.
-- DO NOT RELY ON SMELL ALONE TO DETECT
LEAKS. DUE TO VARIOUS FACTORS, YOU MAY
NOT BE ABLE TO SMELL FUEL GASES.
•U.L. recognized fuel gas and CO detectors are
recommended in all applications, and their
installation should be in accordance with the
manufacturer's recommendations and/or local
laws, rules, regulations, or customs.
-- Installation and service must be performed by a
qualified installer, service agency or the gas
supplier.
EXPLOSION HAZARD
DO NOT USE THIS UNIT IF ANY PART HAS BEEN UN-
DER WATER. A FLOOD DAMAGED UNIT IS EX-
TREMELY DANGEROUS. ATTEMPTS TO USE THE
FURNACE CAN RESULT IN FIRE OR EXPLOSION. A
QUALIFIED SERVICE AGENCY SHOULD BE CON-
TACTED TO INSPECT THE FURNACE AND TO RE-
PLACE ALL GAS CONTROLS, CONTROL SYSTEM
PARTS, ELECTRICAL PARTS THAT HAVE BEEN WET
OR THE FURNACE IF DEEMED NECESSARY.
FAILURE TO FOLLOW THIS WARNING COULD
RESULT IN PROPERTY DAMAGE, PERSONAL INJURY
OR DEATH.
EXPLOSION HAZARD
IN THE EVENT THAT ELECTRICAL, FUEL OR ME-
CHANICAL FAILURES OCCUR, THE OWNER SHOULD
IMMEDIATELY TURN OFF THE GAS SUPPLY AT THE
MANUAL GAS VALVE LOCATED IN THE BURNER COM-
PARTMENT AND ELECTRICAL POWER TO THE FUR-
NACE AND CONTACT SERVICER.
FAILURE TO FOLLOW THIS WARNING COULD RESULT
IN PROPERTY DAMAGE, PERSONAL INJURY OR
DEATH.

User's Information
EXPLOSION HAZARD
SHOULD OVERHEATING OCCUR, OR THE GAS SUP-
PLY FAIL TO SHUT OFF, SHUT OFF THE MANUAL GAS
VALVE TO THE FURNACE BEFORE SHUTTING OFF
THE ELECTRICAL SUPPLY.
FAILURE TO FOLLOW THIS WARNING COULD RESULT
IN PROPERTY DAMAGE, PERSONAL INJURY OR
DEATH.
The following warning complies with State of California law, Proposition 65.
THIS PRODUCT CONTAINS FIBERGLASS WOOL INSULATION!
Fiberglass dust and ceramic fibers are believed by the State of California to cause cancer through inhalation.
Glasswool fibers may also cause respiratory, skin, or eye irritation.
PRECAUTIONARY MEASURES
•Avoid breathing fiberglass dust.
• Use a NIOSH approved dust/mist respirator.
• Avoid contact with the skin or eyes. Wear long-sleeved,
loose-fitting clothing, gloves, and eye protection.
• Wash clothes separately from other clothing: rinse
washer thoroughly.
• Operations such as sawing, blowing, tear-out, and
spraying may generate fiber concentrations requiring
additional respiratory protection. Use the appropriate
NIOSH approved respirator in these situations.
FIRST AID MEASURES
Eye Contact - Flush eyes with water to remove dust.
If symptoms persist, seek medical
attention.
Skin Contact - Wash affected areas gently with soap
and warm water after handling.
CARBON MONOXIDE POISONING HAZARD
FAILURE TO FOLLOW THE INSTALLATION AND OP-
ERATION INSTRUCTIONS FOR THE VENTING
SYSTEM'S OPERATION COULD RESULT IN CARBON
MONOXIDE POISONING OR DEATH.
ELECTRIC SHOCK HAZARD
BODILY INJURY CAN RESULT FROM HIGH VOLTAGE
ELECTRICAL COMPONENTS, FAST MOVING FANS,
AND COMBUSTIBLE GAS. DURING INSTALLATION
AND SERVICING, THE ELECTRICAL SUPPLY MUST
BE DISCONNECTED AND THE MAIN GAS VALVE
MUST BE TURNED OFF.
FAILURE TO FOLLOW THIS WARNING COULD RE-
SULT IN PROPERTY DAMAGE, PERSONAL INJURY
OR DEATH.
RISK OF ELECTRIC SHOCK:
THESE SERVICING INSTRUCTIONS ARE FOR USE
BY QUALIFIED PERSONNEL ONLY. TO REDUCE
THE RISK OF ELECTRIC SHOCK, DO NOT PERFORM
ANY SERVICING OTHER THAN THAT CONTAINED IN
THESE OPERATING INSTRUCTIONS UNLESS YOU
ARE QUALIFIED TO DO SO.
FAILURE TO FOLLOW THIS WARNING COULD
RESULT IN PROPERTY DAMAGE, PERSONAL INJURY
OR DEATH.
If the furnace is shut down during the cold weather
months, provisions must be taken to prevent freeze-up
of all water pipes and water receptacles.
BURN HAZARD
DO NOT ATTEMPT TO MANUALLY LIGHT THE FUR-
NACE.
Never operate your unit for either heating or cooling
with filters removed.
Do NOT touch igniter. It is extremely hot.
The combustion air for your furnace must be fresh un-
contaminated 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 types of products near your furnace.
© 2007 American Standard Inc. All Rights Reserved 32-5035-05

User's Information
General Information
SAFETY HAZARD
Sharp Edge Hazard. Be careful of sharp edges on equip-
ment or any cuts made on sheet metal while installing or
servicing. Personal injury may result.
SAFETY HAZARD
IMPROPER INSTALLATION, ADJUSTMENT, ALTER-
ATION, SERVICE OR MAINTENANCE CAN CAUSE IN-
JURY OR PROPERTY DAMAGE. FOR ASSISTANCE OR
ADDITIONAL INFORMATION CONSULT A QUALIFIED
INSTALLER, SERVICE AGENCY OR THE GAS SUP-
PLIER.
FAILURE TO FOLLOW THIS WARNING COULD RESULT
IN PROPERTY DAMAGE, PERSONAL INJURY OR
DEATH.
The combustion air for your furnace must be fresh un-
contaminated 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 types of products near your furnace.
IMPORTANT FACTS
The flow of combustion and ventilating air must not be
obstructed from reaching the furnace. Air openings pro-
vided in the easing of the furnace must be kept free of
obstructions which would restrict airflow, thereby af-
fecting efficiency and safe operation of your furnace.
Also, air openings provided to the area in which the fur-
nace 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 fur-
naee. 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 in-
sulating materials are combustible.
Furnaces must have air for proper performance. There
must be a free flow of fresh air sut_cient for efficient
combustion and safe ventilation of your furnace.
Never store gasoline, combustible materials, or
other flammable liquids or vapors near your fur-
nace.
Carbon monoxide, fire or smoke can cause serious
bodily injury, death, and/or property damage.
A variety of potential sources of carbon monoxide can be
found in a building or dwelling such as gas-fired clothes
dryers, gas cooking stoves, water heaters, furnaces and
fireplaces. The U.S. Consumer Product Safety Commis-
sion recommends that users of gas-burning appliances
install carbon monoxide detectors as well as fire and
smoke dectectors, listed by a nationally recognized
agency (e.g. Underwriters Laboratories or International
Approval Services), to help alert dwelling occupants of
the presence of fire, smoke or unsafe levels of carbon
monoxide.
NOTE: The manufacturer of your furnace does not test
any detectors and makes no representations regarding
any brand or type of detector.
Installing and servicing heating equipment can be haz-
ardous 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 filters. All
other operations must be performed by trained service
personnel.
Parts and controls of this furnace are unique. Should
service or modification be required, be sure your ser-
vicer uses only factory authorized parts, kits, or acces-
sories for this furnace.
If you experience a problem with the operation of your
furnace, check the "Problem Solver" section of this
manual before you call for a possibly unneeded service
call.
32-5035-05 3

User's Information
To Start the Furnace
Lighting instructions.
Your furnace does not use a continuously burning pilot
flame. Therefore, manually lighting your furnace is not
required. Your furnace is equipped with an automatic ig-
nition system. It uses a hot surface ignition device that
automatically lights the burners each time the comfort
control signals the furnace to start.
BURN HAZARD
DO NOT ATTEMPT TO MANUALLY LIGHT THE FUR-
NACE.
If the furnace is shut down during the cold weather
months, provisions must be taken to prevent freeze-up
of all water pipes and water receptacles.
1. Please read all safety information in this book be-
fore operating furnace.
2. Set comfort control to lowest setting. Turn off all
electric power to furnace.
3. Remove the furnace front panel to gain access to
the main gas valve.
4. Turn external main gas shutoff valve or the toggle
switch located on the main gas valve inside the unit
to the "OFF" position (see illustration on this page).
If an external main gas shutoff valve is used, turn
to "OFF" position (see illustration on next page). Al-
low 5 minutes for any gas within the unit to escape.
LP gas being heavier than air may require forced
ventilation. If you smell gas STOP! Follow the
%Vhat To Do If You Smell Gas" instructions on
the front cover of this book. If you don't smell
gas, go to next step.
5. Turn the external main gas shutoff valve and the
toggle switch located on the main gas valve inside
the unit to the "ON" position (see illustration on
this page).
6. Replace the furnace front access panel.
7. Turn on main electrical supply and set comfort con-
trol to desired setting. Combustion blower will start
and ignition device will start to heat up. After ap-
proximately 15 seconds main gas valve will open and
burners will ignite.
8. Restore electrical supply panel. When the comfort
control is satisfied, main burners will extinguish.
9. If main burners fail to ignite turn off the main elec-
trical supply power or lower the comfort control set-
ting and wait 5 minutes.
10. Raise the comfort control setting and restore elec-
trical supply power. Repeat steps 6 through 8.
11. If furnace still will not light, turn "OFF" all gas and
electricity to unit and call servicer or gas supplier.
For complete shutdown.
Turn the external main gas shutoff valve and the toggle
switch on the main gas valve inside the unit to the
"OFF" position. Disconnect electrical supply to unit.
Whenever your house is to be vacant, arrange to have
someone inspect your house for proper temperature. If
your furnace should fail to operate, damage could re-
sult, such as frozen water pipes.
Flame Roll-out Device.
All models are equipped with a manual resetting rollout
switch located near the burners. In case of flame roll-
out, the switch trips automatically shutting off all flow
of gas. The switch must be manually reset by pressing
the red reset button on the top of the switch.
On/Off Switch
On/OffSwitch
Your furnace will have a switch to turn the gas ON or OFF.
4 32-5035-05

User's Information
NOTE THE LOCATION OF THE MANUAL MAIN GAS SHUTOFF VALVE FOR YOUR FURNACE.
Have your installer or servicer show you the location if you have any questions.
MANUAL MAIN
SHUTOFF._.
UNION JOINT
AUTOMATIC GAS VALVE
WITH MANUAL SHUTOFF AUTOMATIC GAS VALVE
W_H; MANUAL SHUTOFF
UPFLOW FURNACE Manual Main Gas Shut-off Valve May Be Located on the Left or Right Side
AUTOMATIC GAS
VALVE W_H
MANUAL SHUTOFF
MANUAL MAiN
SHUTOFF VALVE
UN_N JOINT
HORIZONTAL FURNACE Manual Main Gas Shut-off Valve May Be Located on the Top or Bottom Side
MAIN MANUAL
._...._-..-" SHUTOFF
VALVE
\AUTOMATIC GAS VALVE
WITH SHUTOFF
_UTOMTAT'C GuAS FVFALVE
DOWNFLOW FURNACE Manual Main Gas Shutoff Valve May Be Located on the Right or Left Side
TOP VIEW OF RIGHT SIDE PIPING
32-5035-05 5

User's Information
Proper Maintenance
AIR FILTERS
NOTE: Filters are NOT included with all Furnaces, how-
ever; the Furnace should never be run without a filter.
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. Ex-
cessive 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 run-
ning with a dirty filter.
Never operate your unit for either heating or cooling
with filters removed.
To clean or replace filters, remove blower access door,
remove the filter from the retaining brackets or retain-
ing wires. After cleaning, replace the filter in the same
manner making sure that the filter wire is secured in
place in both front and back filter retaining brackets or
retaining wires. Replace blower access door.
A bottom return air inlet as shown features a 17" x 25"
x 1" filter in the 17-1/2" wide furnace cabinets; a 20" x
25" x 1" filter in the 21" wide models; and a 24"x 25" x
1" filter in the 24-1/2" wide cabinet.
Help ensure top efficiency by cleaning the filter once a
month. Clean it twice a month during seasons when the
unitrunsmo oof on.
................................................................................You can clean the filter with a vacuum, OR you can wash
it with a household detergent.
Your filter may or may not be framed.
Replacing your filter.
When replacing your furnace filters, always use a high
velocity type which are the same size as originally sup-
plied. Filters are available fi'om your dealer.
Where disposable filters are used, they must be a high
velocity type which are the same size as originally sup-
plied.
How to remove your filter.
ELECTRIC SHOCK HAZARD
DISCONNECT POWER TO UNIT BEFORE REMOVING
BLOWER DOOR.
UPFLOW
BOTTOM RETURN
FILTER
_-_BLOWER RETAINER
ACCESS BRACKET
DOOR
FILTER Airflow
BLOWER
UPFLOW _ "_ACCESS
SIDE RETURN_ DOOR
For vertical UPFLOW ONLY, a left or right return air
inlet as above (left side shown) requires trimming of the
factory supplied filter to 17" x 25" x 1" for both the 21"
and 24-1/2" wide furnaces.
Air filters may also be located outside of the furnace us-
ing a SIDE FILTER FRAME.
Upflow furnaces use a high velocity type air filter which
may be located within the furnace blower compartment
in either a BOTTOM or SIDE (left or right) return air
inlet. The furnace may be secured with filter retaining
brackets (as shown) or a filter retainer wire.
6 32-5035-05

UPFLOW
ONLY >FILTER
ACCESS
Upflow/Horizontal Furnace Filters
The Upflow/Horizontal furnace when installed horizon-
tally 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 loca-
tion of your filters.
An upflow/horizontal furnace in horizontal return air fil-
ter application, as shown, features two 16"x 20"x 1" fil-
ters in the 1%1/2", 21" and 24-1/2" wide furnace cabi-
nets.
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 bot-
tom filter brackets. Replace filter access door.
UPFLOW/HORIZONTAL WITH FILTER KIT
Air filters may also be located outside of the furnace us-
ing 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.
User's Information
REQUIRED FILTERS - BOTTOM
CABINET WIDTH FILTERQUANTITY & SIZE
17-1/2" 1 -17"X 25" X 1"
21" 1-20"X25"X 1"
24-1/2" 1 - 24" X 25" X 1"
REQUIRED FILTERS - SIDE **
CABINET WIDTH FILTER QUANTITY & SIZE
17-1/2" 1 - 17" X 25" X 1"
21" 1-20"X25"X 1"
24-1/2" 1 - 24" X 25" X 1"
**ONUPFLOW5 TONAIRFLOWMODELS, IFTHE
AIRFLOWREQUIREMENTEXCEEDS1800CFM, THESE
MODELSWILLREQUIREFILTERSONBOTHSIDESOR
1SIDEANDTHEBOTTOM, ORJUSTTHEBOTTOM
DOWNFLOW FILTER
UPFLOW (Vertical) FILTER TABLES
Downflow/Horizontal furnaces are factory supplied with
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 return air filter applica-
tion, as shown, features two 14" x 20" x 1" filters in the
1%1/2" wide furnace cabinets; or two 16" x 20" x 1" fil-
ters in the 21" and 24-1/2" wide furnace cabinets.
32-5035-05 7

User's Information
REQUIRED FILTERS - DOWNFLOW
CABINET WIDTH FILTERQUANTITY & SIZE
17-1/2" 2 -14" X 20" X 1"
21" 2- 16" X20" X 1"
24-1/2" 2- 16" X20" X 1"
DOWNFLOW/HORIZONTAL FILTER
DOWNFLOW (Vertical) FILTER TABLE
The Problem Solver
CARBON MONOXIDE POISONING HAZARD
DO NOT ATTEMPT TO CHANGE THE VENTING SYS-
TEM. FAILURE TO FOLLOW THE INSTALLATION AND
OPERATION INSTRUCTIONS FOR THE VENTING
SYSTEM'S OPERATION COULD RESULT IN CARBON
MONOXIDE POISONING OR DEATH.
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 in-
warranty unit may void the remainder of your war-
ranty.
Other than performing the simple maintenance recom-
mended 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.
In the event that electrical, fuel, or mechanical failures
occur, you should immediately turn the gas supply off at
the manual gas valve located in the burner compart-
ment. Also, turn off electrical power to the furnace and
contact a qualified service agency.
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 house-
hold detergent. Lacquer thinner or other synthetic sol-
vents may damage the finish.
Save time and money. Before calling for
Problem
No Heating --
Blower does not operate
Possible Trouble
1. Thermostat set incorrectly.
2. Blown fuse or tripped circuit breaker.
3. Burner does not ignite.
4. Main gas line turned off.
5. Blower door removed or ajar.
6. Lockout
service, check the following:
Possible Remedy
1. Adjust thermostat. See operating instructions.
2. Replace or reset protective device or call for servicer.
3. Call Servicer.
4. Have gas company check.
5. Close door securely to restore power to blower and gas
valve.
6. Turn power on-off-on-off twice in 30 seconds.
Insufficient Heating -- 1. Dirty air filters. 1. Clean or replace filters.
Blower operates continuously. 2. Blocked supply or return registers. 2. Make sure registers are open and no obstacles are blocking
off the air
Unusual Noise Call your servicer.
8 32-5035-05

The following warning complies with State of California law, Proposition 65.
User's Information
THIS PRODUCT CONTAINS FIBERGLASS WOOL INSULATION!
Fiberglass dust and ceramic fibers are believed by the State of California to cause cancer through inhalation.
Glasswool fibers may also cause respiratory, skin, or eye irritation.
PRECAUTIONARY MEASURES
•Avoid breathing fiberglass dust.
• Use a NIOSH approved dust/mist respirator.
• Avoid contact with the skin or eyes. Wear long-sleeved,
loose-fitting clothing, gloves, and eye protection.
• Wash clothes separately from other clothing: rinse
washer thoroughly.
• Operations such as sawing, blowing, tear-out, and
spraying may generate fiber concentrations requiring
additional respiratory protection. Use the appropriate
NIOSH approved respirator in these situations.
FIRST AID MEASURES
Eye Contact - Flush eyes with water to remove dust.
If symptoms persist, seek medical
attention.
Skin Contact - Wash affected areas gently with soap
and warm water after handling.
Regular Dealer Maintenance
Regular maintenace to be performed by a qualified ser-
vice professional ONLY.
The following warning complies with State of California law, Proposition 65.
HAZARDOUS GASES!
EXPOSURETO FUEL SUBSTANCES OR BY-PRODUCTS
OFINCOMPLETE FUEL COMBUSTIONIS BELIEVED BY
THE STATE OF CALIFORNIATO CAUSE CANCER, BIRTH
DEFECTS_OR OTHER REPRODUCTIVE HARM.
HAZARDOUS GASES
UNIT IS EQUIPPED WITH A BLOWER DOOR SWITCH
WHICH CUTS POWER TO BLOWER AND GAS VALVE
CAUSING SHUTDOWN WHEN DOOR IS REMOVED.
UNIT MUST NOT BE ALTERED TO ALLOW OPERATION
WITH THE BLOWER DOOR REMOVED. OPERATION
WITH DOORS REMOVED OR AJAR CAN PERMIT THE
ESCAPE OF DANGEROUS FUMES. ALL PANELS
MUST BE SECURELY CLOSED AT ALL TIMES FOR
SAFE OPERATION OF THE FURNACE.
ELECTRIC SHOCK HAZARD
IN THE EVENT THAT ELECTRICAL, FUEL OR ME-
CHANICAL FAILURES OCCUR, THE OWNER SHOULD
IMMEDIATELY TURN OFF THE GAS SUPPLY AT THE
MANUAL GAS VALVE LOCATED IN THE BURNER COM-
PARTMENT AND ELECTRICAL POWER TO THE FUR-
NACE AND CONTACT SERVICER.
FAILURE TO FOLLOW THIS WARNING COULD RESULT
IN PROPERTY DAMAGE, PERSONAL INJURY OR
DEATH.
Do NOT touch igniter. It is extremely hot.
32-5035-05
EXPLOSION HAZARD
SHOULD OVERHEATING OCCUR, OR THE GAS SUP-
PLY FAIL TO SHUT OFF, SHUT OFF THE MANUAL GAS
VALVE TO THE FURNACE BEFORE SHUTTING OFF
THE ELECTRICAL SUPPLY.
FAILURE TO FOLLOW THIS WARNING COULD RESULT
IN PROPERTY DAMAGE, PERSONAL INJURY OR
DEATH.
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 exces-
sive 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.
2. BLOWERS - The blower size and speed deter-
mine 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.

User's Information
BURNER
BRACKET
MAIN BURNER
ORIFICE (Typical)
3. IGNITER - This unit has a special hot surface di-
rect ignition device that automatically lights the
burners. Please note that it is very fragile and
should be handled with care.
4. BURNER - Gas burners do not normally require
scheduled servicing, however, accumulation of for-
eign material may cause a yellowing flame or de-
layed ignition. Either condition indicates that a set-
vice 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 burn-
ers, remove top burner bracket and lift burner from ori-
flee.
NOTE: Be careful NOT to break igniter when removing
burners.
Clean burners with brush and/or vacuum cleaner. Re-
assemble parts by reversal of the above procedure.
NOTE: On LP (propane) units, some light yellow tip-
ping 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, burn-
ers 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.
5. HEAT EXCHANGER/FLUE PIPE - These items
must be inspected for signs of corrosion, and/or de-
terioration 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 re-
set circuit breaker.
7. OPERATION - Your warm air furnace should not
be operated in a corrosive atmosphere. Paint sol-
vents, cleaning chemicals, spray propellants, and
bleaches should not be used in the vicinity of the
furnace during normal operation.
8. CONDENSATE DRAINS - If you have a cooling coil
installed with your furnace, condensate drains
should be checked and cleaned periodically to as-
sure that condensate can drain freely from coil to
drain. If condensate cannot drain freely water dam-
age could occur. Furnace drain should also be
checked & cleaned at the start of each heating sea-
son.
9. AIR CIRCULATION - To ensure increased comfort,
the blower on this unit may be operated continu-
ously 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 com-
fort control fan selector to "ON". Continuous fan
mode during COOLING operation may not be ap-
propriate in humid climates. If the indoor air ex-
ceeds 60% relative humidity or simply feels uncom-
fortably humid, it is recommended that the fan only
be used in the "AUTO" mode."
_l!Olllt_flk'if.'l1t
As an ENERGY STAR Partner, American
Standard Inc., has determined that this
product meets the ENERGY STAR guide-
lines for energy efficiency.
American Standard, Inc.
6200 Troup Highway
Tyler, TX 75707
www.americanstandard.com
For more information contact
your local dealer. The manufacturer has a policy of continuous product and product data improvement; it reserves the right to change design and specifications without notice.
10 32-5035-05

User's Information
Limited Warranty
High Efficiency
Condensing Gas Furnace
UH3, DH3, UX1, DX1, UXI-H, DXI-H, UX2, DX2,
UX, DX, UY, DY, UH2, and DH2 (First letter may be
preceded byan "A"or "T") (Parts Only)
Models Less Than 20 Tons for Residential Use*
This limited warranty is extended by American Standard Inc., to the original purchaser of the specified models for
life, under the conditions set forth below or to any succeeding owner for a period of twenty (20) years from the date of
installation, as originally affixed, for the original owner. This limited warranty applies to products purchased and
retained for use within the U.S.A. and Canada.
Limited Warranty
Ifany part of your furnace fails because of a manufacturing defect within five (5) years from the date of original
purchase, Warrantor will furnish without charge the required replacement part F.O.B. nearest Parts Distribution point.
Any local transportation, related service labor, air filters, and diagnosis calls, are not included.
Limited Lifetime Warranty
The primary and secondary heat exchanger, when installed to serve a single family residence or single condominium,
is warranted to the original purchaser for life, provided the installation is in the original purchaser's primary,
uninterrupted residence from the date of purchase until discovery of adefect in the primary heat exchanger or
secondary heat exchanger. The heat exchanger is warranted to a successor purchaser for a period of twenty (20)
years from the date of original installation of the furnace, subject to proof of original purchase. Warrantor WILL AT ITS
OPTION provide either a heat exchanger including secondary heat exchanger without charge F.O.B. nearest Parts
Distribution point, or allow a credit in the amount of the then current wholesale price of an equivalent heat exchanger
toward the purchase price of a comparable heating unit. Any local transportation, related service labor, air filters, and
diagnosis calls, are not included.
This limited warranty does not cover failure of your gas furnace if it isdamaged while in your possession, damage
caused by unreasonable use of the gas furnace and/or damage from failure to properly maintain the gas furnace as
set forth in the Use and Care manual (see Proper Maintenance section)..
THE LIMITED WARRANTY AND LIABILITY SET FORTH HEREIN ARE IN LIEU OF ALL OTHER
WARRANTIES AND LIABILITIES, WHETHER IN CONTRACT OR IN NEGLIGENCE, EXPRESS
OR IMPLIED, IN LAW OR IN FACT, INCLUDING IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR PARTICULAR USE, AND IN NO EVENT SHALL
WARRANTOR BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES.
Some states do not allow limitations on how long an implied limited warranty lasts or do not allow the exclusion or
limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This
limited warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
Parts will be provided by our factory organization through an authorized service organization in your area listed in the
yellow pages. Ifyou wish further help or information concerning this limited warranty, contact:
American Standard Inc.
6200 Troup Highway
Tyler,TX 75707
Attention: Manager, Field Operations Excellence
GW-671-1207
* This limited warranty isfor residential usage of this equipment and not applicable when this equipment is used for a
commercial application. A commercial use is any application where the end purchaser uses the product for other than
personal, family or household purposes.
32-5035-05 11

User's Information
Limited Warranty
Induced Draft Gas Furnace
UC1, DC1, UX1, DX1, UXI-H, DXI-H,
UX, DX, UY, DY, UD.R, DD.R, UD.RV,
DD-RV, UDI-H, DDI-H, UD1, DD1,
UD2, DD2, UE1, DE1, CUB1, CDB1,
UH2, and DH2
(First letter may be preceded by an "A" or "T") (Parts Only)
Models Less Than 20 Tons for Commercial Use*
This warranty is extended by American Standard Inc., to the original purchaser and to any succeeding owner of the
real property to which the Gas Furnace is originally affixed, and applies to products purchased and retained for use
within the U.S.A. and Canada. There is no warranty against corrosion, erosion or deterioration.
If any part of your Gas Furnace fails because of a manufacturing defect within one year from the date of the original
purchase, Warrantor will furnish without charge the required replacement part.
This limited warranty does not cover failure of your gas furnace if it is damaged while in your possession, damage
caused by unreasonable use of the gas furnace and/or damage from failure to properly maintain the gas furnace as
set forth in the Use and Care manual (see Proper Maintenance section).
In addition, ifthe steel heat exchanger fails because of a manufacturing defect within the second through twentieth
year from the date of original purchase, Warrantor shall furnish without charge a replacement heat exchanger.
Warrantor's obligations and liabilities under this warranty are limited to furnishing F.O.B. Warrantor factory or
warehouse replacement parts for Warrantor's products covered under this warranty. No liability shall attach to
Warrantor until products have been paid for and then liability shall be limited solely to the purchase price of the
equipment under warranty shown to be defective.
THE WARRANTY AND LIABILITY SET FORTH HEREIN ARE IN LIEU OF ALL OTHER
WARRANTIES AND LIABILITIES, WHETHER IN CONTRACT OR IN NEGLIGENCE, EXPRESS
OR IMPLIED, IN LAW OR IN FACT, INCLUDING IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR PARTICULAR USE, AND IN NO EVENT SHALL
WARRANTOR BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES.
Some states do not allow limitations on how long an implied warranty lasts or do not allow the exclusion or limitation
of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty
gives you specific legal rights, and you may also have other rights which vary from state to state.
American Standard Inc.
6200 Troup Highway
Tyler, TX 75707
Attention: Manager, Field Operations Excellence
GW-672-1207
*This warranty is for commercial usage of said equipment and not applicable when the equipment is used for a
residential application. Commercial use is any application where the end purchaser uses the product for other than
personal, family or household purposes.
12 32-5035-05