American Standard Gas Furnaces User's Manual
Contents
1. 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 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 FACTORY SUPPLIED UPFLOW FURNACE RETURN AIR FILTERS UPFLOW FURNACE RETURN AIR FILTERS 17 1 2 X 25 X 1 17 1 2 X 25 X 1 17 1 2 X 25 X 1 17 1 2 X 25 X 1 17 X 25 X 1 20 X 25 X 1 24 X 25 X 1 NOTE On 5 ton airflow models if the airflow requirement exceeds 1800 CFM these models will require filters on both sides OR 1 side and the bottom OR just the bottom 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 How to remove your filter The upflow furnace blower door has a hinge at the2. 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 CONDENSATE DRAINS If you have a cooling coil installed with your furnace condensate drains should be checked and cleaned periodically to assure that conden sate can drain freely from coil to drain If condensate cannot drain freely water damage could occur Furnace drain should also be checked amp cleaned at the start of each heating season 9 AIR CIRCULATION To ensure increased comfort the 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 tempera tures by avoiding temperature stratification throughout the conditioned area To accomplish constant air circulation set your thermostat fan switch to ON A WARNING Should overheating occur or the gas supply fail to shut off shut off the manual gas valve to the furnace before shut ting off the electrical supply 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 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
3. 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 32 5034 04 The following warning complies with State of California law Proposition 65 A WARNING Hazardous Gases Exposure to fuel substances or by products of incomplete fuel combustion is believed by the state of California to cause cancer birth defects or other reproductive harm 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 A WARNING 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 opera tion with th
4. 32 5034 04 Gas Furnaces Non Condensing Fan Assisted Combustion System Upflow Horizontal and Downflow Horizontal A 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 e Do not try to light any appliance e Do not touch any electrical switch do not use any phone in your building e Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions e 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 e 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 A WARNING DO NOT USE THIS UNIT IF ANY PART HAS BEEN UNDER WATER IMMEDIATELY CALL A QUALIFIED SERVICE TECHNICIAN TO INSPECT THE FURNACE AND TO RE PLACE ANY PART OF THE CONTROL SYSTEM AND ANY GAS CONTROL WHICH HAS BEEN UNDERWATER GENERAL INFORMATION Understand the signal words D
5. ANGER WARNING AND CAUTION These words are safety alert words DANGER indicates the most serious hazards which will result in severe personal injury or death WARNING indicates hazards which could result in personal injury or death CAUTION is used to indicate unsafe practices which could result in minor injury or property damage Contents Dangers Warnings amp Cautions General Information To Start the Furnace Proper Maintenance The Problem Solver Regular Dealer Maintenance Warranty O N O FP N IMPORTANT FACTS The flow of combustion and ventilating air must not be obstructed from reaching the furnace Air openings provided in the casing of the 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 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 insu lating materials as some insulating materials are combustible Furnaces must have air for proper performance There must be a free flow of fresh air suffi
6. MBUSTIBLE GAS FOR PROTECTION FROM THESE INHERENT HAZARDS DURING INSTALLATION AND SERVICING THE ELECTRICAL SUPPLY MUST BE DIS CONNECTED AND THE MAIN GAS VALVE MUST BE TURNED OFF 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 Untrained personnel can perform basic maintenance func tions such as cleaning and replacing filters All other opera tions must be performed by trained service personnel 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 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 A 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 con sult a qualified installer service agency or the gas supplier 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 ignition system It uses a hot s
7. 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 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 ai v 32 5034 04 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 FILTER RACK RAILS a SPRINGS gt AUTOMATIC ADJUSTMENT RETAINING PIN Both Sides FILTER RACK ASSEMBLY 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 man
8. call is required For best operation burners must be cleaned annually using brushes and vacuum cleaner BURNER BRACKET In the event that electrical fuel or mechanical failures occur the owner should immediately turn off the gas supply at the manual gas valve located in the burner compartment and electrical power to the furnace and contact servicer MANIFOLD MAIN BURNER ORIFICE Typical 8 32 5034 04 User s Information Limited Warranty High Efficiency Induced Draft Gas Furnace UD C DD C UD R DD R UD RV and DD RV First letter may be preceded by an 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 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 If any part of your Gas Furnace fails because of a manufacturing defect within five years from the date of the original purchase Warrantor will furnish without charge the required replacement part Any local transportation related service labor air filters and diagnosis calls are not included In addition if the steel heat exchanger fails because of a manufacturing defect within the sixth through twentieth year from the date of original purchase Warrantor will furnish without charge a replacement heat exchanger Any local tra
9. cient for efficient combustion and safe ventilation of your furnace The combustion air for your furnace must be fresh uncon taminated air Paints varnishes laundry bleaches deter gents 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 Never store gasoline combustible materials or other flam mable liquids or vapors near your furnace Carbon monoxide fire or smoke can cause serious bodily injury death and or property damage Users information 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 Commission recommends that users of gas burning appliances install carbon monoxide detectors as well as fire and smoke detectors 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 detec tors and makes no representations regarding any brand or type of detector A WARNING BODILY INJURY CAN RESULT FROM HIGH VOLTAGE ELECTRICAL COMPONENTS FAST MOVING FANS AND CO
10. 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 if the steel heat exchanger fails because of a manufacturing defect within the second through twenti eth year from the date of original purchase Warrantor shall furnish without charge a replacement heat ex changer 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 lim
11. e lower thermostat setting or disconnect electrical supply wait 5 minutes raise thermostat setting above indicated temperature 10 If furnace will not light turn OFF all gas and electric ity to unit and call servicer or gas supplier For complete shutdown Turn gas cock knob on main gas valve to OFF position Disconnect electrical supply to unit A CAUTION If this is done during the cold weather months provisions must be taken to prevent freeze up of all water pipes and water receptacles 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 result such as frozen water pipes Flame Roll out Device All models are equipped with a fusible link located near the burners In case of flame roll out the link will open melt and cause the circuit to open which shuts off all flow of gas 32 5034 04 User s Information Outlet Pressure Boss Your furnace may have a Knob Switch or a Toggle Switch to turn the gas ON or OFF Regulator Adjust Inlet Pressure j Boss opt N Y S y SWITCH TOGGLES ON OR OFF On Off Switch NOTE THE LOCATION OF THE MANUAL MAIN GAS SHUT OFF VALVE FOR YOUR FURNACE Have your installer or
12. e 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 Users information 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 SS SS ae 5 HEAT EXCHANGER FLUE PIPE These items A CAUTION must be inspected for signs of corrosion and or Do not touch igniter It is extremely hot deterioration at the beginning of each heating season by a qualified service technician and cleaned annually 4 BURNER Gas burners do not normally require for best operation scheduled servicing however accumulation of foreign 6 CIRCUIT PROTECTION If blower or gas valve fail to material may cause a yellowing flame or delayed igni operate the cause could be the circuit breaker or a loose NOTE On LP propane units due to variations in BTU content and altitude servicing may be required at shorter intervals tion Kither 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 or blown fuse Replace fuse or reset circuit breaker OPERATION Your warm air furnace should not be
13. er help or information concerning this limited warranty contact American Standard Inc Troup Highway Tyler TX 75711 9010 Attention Manager After Sales Support GW 629 1802 This limited warranty is for 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 Extended warranties are available from the manufacturer through your dealer The limited warranty is backed by the manufacturer and any representations made about extending the limited warranty would be backed by the manufacturer if and only if an extended warranty agreement was received from the manufacturer 11 2002 32 5034 04 9 Users information Limited Warranty High Efficiency Induced Draft Gas Furnace UD C DD C UD R DD R UD RV and DD RV 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
14. ey Before calling for service check the following Possible Trouble Possible Remedy No Heating Blower does not operate Blown fuse or tripped circuit breaker Defective component Burner does not ignite Main gas line turned off Blower door removed or ajar Lockout Insufficient Heating Blower operates continuously Dirty air filters registers No Heat Vent motor is running Condensate drain Thermostat set incorrectly Blocked supply or return Restricted or plugged furnace Adjust thermostat See operating instructions Replace or reset protective device or call for servicer Most controls are automatic and will recycle If your unit still does not operate call for servicer Call servicer Have gas company check Close door securely to restore power to blower and gas valve Turn power on off on off twice in 30 seconds Clean or replace filters Make sure registers are open and No obstacles blocking off the air Remove drain clamps to condensate trap and drain pan outlet Flush or clean drain blockage Reinstall clamps 32 5034 04 The following warning complies with State of California law Proposition 65 User s Information A WARNING 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 als
15. ilter and the method of changing the filters Users information Downflow Furnace Filters 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 DOWNFLOW FILTER A downflow horizontal furnace vertical 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 2 14 X20 X 1 X X 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 in warranty unit may void the remainder of your warranty 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 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 mon
16. itation 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 Troup Highway Tyler TX 75711 9010 Attention Manager After Sales Support GW 636 1802 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 Extended warranties are available from the manufacturer through your dealer The limited warranty is backed by the manufacturer and any representations made about extending the limited warranty would be backed by the manufacturer if and only if an extended warranty agreement was received from the manufacturer CERTIFIED 10 32 5034 04 User s Information Notes 32 5034 04 11 American Standard Inc Pl 11 02 6200 Troup Highway Tyler TX 75707 For more information contact Since the manufacturer has a policy of continuous product and product data improvement it reserves the right your local dealer distributor to change design and specifications without notice
17. ner making sure that filter is secured in place in both front and back filter retaining brackets of the unit Replace blower access door Air filters may also be located outside of the furnace using a SIDE FILTER FRAME 32 5034 04 User s Information FILTER ACCESS 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 UPFLOW HORIZONTAL WITH FILTER KIT 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 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 f
18. nsportation related service labor air filters and diagnosis calls are not included 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 This limited warranty applies to product installed on or after 10 1 2001 where product is manufactured after 1 1 2000 This limited warranty is not retroactive to any installations prior to 10 1 2001 or on product produced prior to 2000 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 If you wish furth
19. o 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 A 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 Regular Dealer Maintenance 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
20. servicer show you the location if you have any questions MANUAL MAIN SHUTOFF VALVE x lt ul gt D n KS S Q MAN UAL MAIN N A E SHUTOFF VALVE GROUND UNION JOINT im S GROUND UNION JOINT DRIP LEG 7 gt 7 DRIP LEG AUTOMATIC GAS VALVE AUTOMATIC GAS VALVE WITH MANUAL SHUTOFF WITH MANUAL SHUTOFF UPFLOW FURNACE Manual Main Gas Shut off Valve May Be Located on the Left or Right Side VALVE WITH MANUAL SHUTOFF MANUAL MAIN SHUTOFF VALVE AUTOMATIC GAS VALVE Teatro WITH MANUAL SHUTOFF GROUND m UNION JOINT DRIP LEG HORIZONTAL FURNACE Manual Main Gas Shut off Valve May Be Located on the Top or Bottom Side AUTOMATIC GAS VALVE WITH MANUAL SHUTOFF TOP VIEW TOP VIEW OF RIGHT SIDE PIPING 32 5034 04 User s Information Proper Maintenance Reduces Energy Use 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 A CAUTION
21. urface ignition device that automatically lights the burners each time the thermostat signals the furnace to start A WARNING Do not attempt to manually light the furnace 1 Please read all safety information in this book before operating furnace 2 Set thermostat 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 gas cock knob clockwise or the toggle switch located on the main gas valve inside the unit to OFF position see illustration on next page If external gas cock is used turn to OFF position see illustration on next page Allow 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 What 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 gas cock knob counterclockwise or the toggle switch to ON marker see illustration on next page 6 Replace the furnace front access panel 2002 American Standard Inc All Rights Reserved 7 Turn on main electrical supply and set thermostat to desired setting Combustion blower will start and ignition device will start to heat up After approximately 15 seconds main gas valve will open and burners will ignite 8 When thermostat is satisfied main burners will extinguish 9 If main burners fail to ignit
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