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Back To Williams Wall Furnace       Model: 6508732 Williams CounterFlow Top Vent Gas Wall Furnaces
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INSTALLATION & OPERATING INSTRUCTION MANUAL owners COUNTERFLOW TOP VENT manual GAS WALL FURNACES MODEL NOS . READ THIS OWNERS MANUAL 3508332 CAREFULLY BEFORE YOU INSTALL 3508732 5008732 YOUR NEW WILLIAMS WALL FURNACE 5508332 6508732 WARNING : If the information in this manual is not followed exactly , a fire or ex - FOR USE WITH plosion may result causing property NATURAL GAS ONLY 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 • Open all windows . • Do not try to light any appliance . • Do not touch any electrical switch ; do MODEL NOS . not use any phone in your building . 3508331 • Extinguish any open flame . • Immediately call your gas supplier 3508731 from a neighbor's phone . Follow the 5008731 gas supplier's instructions . 5508331 • If you cannot reach your gas supplier , 6508731 call the fire department . Installation and service must be per - FOR USE WITH formed by a qualified installer , service LIQUEFIED agency or the gas supplier . PETROLEUM ( L . P . ) GAS ONLY WARNING : Improper installation , adjust - ment , alteration , service or maintenance Save This Manual For can cause injury or property damage . Refer to this manual . For assistance or Future Reference . additional information consult a qualified installer , service agency or the gas supplier . WARNING : Do not install any of these fur - I naces ( Natural or L . R Gas ) in mobile homes , trailers , or recreational vehicles . I ALL MODELS ARE CERTIFIED FOR USE IN CANADA EXCEPT 6508731 AND 6508732 . Williams Furnace Co . , 225 Acacia St . , Colton , CA 92324 , USA PRINTED IN U . S . A 6 / 98 P321005
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Contents Vent Installation . . . . . . . . . . . . . . . . . . . . . . . . 13 - 15 Your Williams Warranty . . . . . . . . . . . . . . . . . . . . . . . . . 2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Mounting Your Furnace . . . . . . . . . . . . . . . . . . . . . 15 - 17 Basic Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Gas Supply and Piping . . . . . . . . . . . . . . . . . . . . . . 17 - 18 Optional Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Electrical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 - 19 Thermostat Installation . . . . . . . . . . . . . . . . . . . . . . 20 - 21 Helpful Installation Information . . . . . . . . . . . . . . . . . . . 3 Safety Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Optional Accessory Installation . . . . . . . . . . . . . . . 21 - 23 Unpack Your Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Start Up Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Basic Tools Needed . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Operating Your Furnace . . . . . . . . . . . . . . . . . . . . . 25 - 30 Basic Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 How To Care For Your Furnace . . . . . . . . . . . . . . . 31 - 32 Installing Your Wall Furnace . . . . . . . . . . . . . . . . . . . . . 6 Furnace Technical Information . . . . . . . . . . . . . . . . . . 32 Locating Wall Furnace and Thermostat . . . . . . . . . . 6 - 7 TROUBLESHOOTING CHART . . . . . . . . . . . . . . . 33 - 36 Combustion and Ventilation Air . . . . . . . . . . . . . . . . 7 - 10 Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 - 38 Installation Repair Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 - 46 Recessed Mount Installation . . . . . . . . . . . . . 10 - 12 SERVICE HINTS . . . . . . . . . . . . . . . . . . . . . . Back Cover Surface Mount Installation . . . . . . . . . . . . . . . . 12 - 13 How To Order Repair Parts . . . . . . . . . . . . . Back Cover Your Warranty The Manufacturer , Williams Furnace Co . , warrants this wall furnace or heater to the original purchaser under the following conditions : LIMITED ONE - YEAR WARRANTY 1 . Any part thereof which proves to be defective in material or workmanship within one year from date of original purchase for use will be repaired or replaced al the Manufacturer's option , FOB its factory , 2 . No liability is assumed by the Manufacturer for removal or installation labor costs , nor for freight or delivery charges . LIMITED EXTENDED WARRANTY 1 , In addition to the above limited one - year warranty on the complete unit , any heat exchanger which burns out or rusts under normal installation , use and service conditions during a period of nine years following expiration of the one - year warranty period will be exchanged for a like or functionally similar part . 2 . No liability is assumed by the Manufacturer for removal or installation labor costs , nor for freight or delivery charges LIMITATIONS 1 . THIS LIMITED WARRANTY IS THE ONLY WARRANTY MADE BY THE MANUFACTURER . IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE ARE LIMITED TO THE SAME ONE YEAR TERM AS THIS EXPRESS WARRANTY . UNDER NO CIRCUMSTANCES SHALL THE MANUFACTURER BE LIABLE FOR INCIOENTAL , CONSEQUENTIAL , SPECIAL OR CONTINGENT DAMAGES OR EXPENSES ARISING DIRECTLY OR INDIRECT - LY FROM ANY DEFECT IN THE PRODUCT OR ANY COMPONENT OR FROM THE USE THEREOF THE REMEDIES SET FORTH HEREIN ARE THE EXCLUSIVE REMEDIES AVAILABLE TO THE USER AND ARE IN LIEU OF ALL OTHER REMEDIES Some states do not allow limitations on how long an implied warranty lasts , and some states do not allow the exclusion or limitation of incidental or consequential damages , so the above limitations or exclusions may not appty to you 2 . This warranty does not include any charge for labor or installation 3 . This warranty does not extend to painted surfaces nor to damage or defects resulting from accident , alleration , misuse or abuse , or improper installation . 4 This warranty does not cover claims which do not involve defective workmanship or materials . DUTIES OF THE CONSUMER 1 . The heating equipment must be installed by a qualified installer and operated in accordance with the installation and homeowner's instructions furnished with the equipment . 2 , Any travel , diagnostic costs , service labor , and labor to repair the defective unit will be the responsibility of the owne _ 3 , A bill of sale , cancelled check , payment record or permit should be kept to verify purchase date to establish the warranty period . 4 . Have the installer enter the requested information in the space below . GENERAL 1 The Manufacturer neither assumes nor authorizes any person to assume for it any other obligation or liability in connection with said equipment 2 . Service under this warranty should be obtained by contacting your dealer Provide the dealer with the model number , serial number and purchase date verification 3 . If . within a reasonable time after contacting your deale _ satisfactory service has not been received , contact : Customer Service Department , 225 Acacia St . , Colton , CA 92324 _ for assistance 4 THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS , AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE INSTALLATION INFORMATION Model No . Serial No Orig . Purchaser Address City and State Zip Dealer Address . City and State Zip Installation date Signed by ( Dealer or authorized representative who certifies that this appliance has been installed in accordance with Manufacturer's instructions and local codes . )
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introduction Please read our instructions before you install and use your furnace . This will help you obtain the full value from this furnace . It could help you avoid needless service costs , if the answer to the problem is found within this instruction manual . Basic Description The combustion system draws combustion air directly from Your Counterflow Top Vented Wall Furnace is shipped the room in which the furnace is installed , and through ven - ready to install on the surface of a wall or recessed up to tilation grills or ducts connected to the outdoors , such as an 9 - 1 / 4 inches in a wall , with wall studs spaced 16 inches attic or crawl space . The combustion gases are discharged center to center . through the roof within a listed vent pipe Vent piping and exhaust are not part of the Williams fur - The furnace heat exchanger is built of heavy gauge steel nace package and must be purchased separately . treated for corrosion resistance . The fan at the top forces Always consult your local heating or plumbing inspector , air down along the front , back and sides of the heat building department or gas utility company regarding exchanger where it is discharged into the room . The fur - regulations , codes or ordinances which apply to the in - nace cabinet is also constructed of heavy gauge steel and stallation of a counterflow top vented wall furnace . has an enamel paint finish . Air is drawn in at the top by the fan and discharges through Models 3508331 ; 3508332 ; 5508331 and 5508332 are a grille near the floor . A two - speed fan is used with Model equipped with an electronic ignitionautomatic pilot relight 50087 ; 55083 and 65087 series . A single speed fan is us - system . ed on all other models . The furnace contains a multi - slot This appliance is equipped with a vent safety shutoff sys - burner ( two on Model 50087 ; 55083 and 65087 series ) and tem designed to protect against improper venting of com - burns either Natural or L . P ( Liquefied Petroleum ) Gas , bustion products . Operation of this wall furnace when not depending on the model you have purchased . connected to a properly installed and maintained ventil - lating system or tampering with the vent safety shutoff sys - The furnace controls are located behind an access door tem can result in carbon monoxide ( CO ) poisioning and on the lower front of the furnace . All models are equipped possible death . with American Gas Association listed gas valves and pilots . Optional Accessories TRIM STRIP KIT 4701 OUTLET GRILLE REGISTER 6701 pg . 21 & 22 Lets you route some heated air to a second room . Mounts Provides finished edge at sides of wall furnace . Neutral on side wall of second room and must be within 10 inches beige enamel painted steel . of wall furnace . OVAL VENT KIT 9901 This U . L . listed B / W vent kit contains 4 feet of oval double - DIFFUSER GRILLE KIT 6703 Fig . 3 , pg . 7 walled vent pipe , plate spacers and starter or hold - down Lets you route some heated air in a two - way direction . Kit plate that starts the venting from the top of furnace . See 6704 for one - way direction . page 13 for additional items you will need . VENT ENCLOSURE KITS 9812 or 9824 REAR OUTLET KIT 6801 These kits are used only when the furnace is surface Lets you route some heated air to a second room behind mounted . They enclose the vent pipe from the top of the the furnace . Finished wall of second room must be within surface to the ceiling . 10 inches of furnace . Ref . Fig . D , pg . 7 . Built - in damper lets you shut off air flow to second room if desired . SIDE GRILLE KIT 6702 Allows you to direct heated air from the side of furnace SHORT REAR OUTLET KIT 6802 into the same room . Lets you route some heated air to a second room behind NOTE the furnace when furnace is recessed mounted . Finished All kits are identified on the carton by their Manufacturing wall cannot be more than 3 / 4 inches from rear of furnace . Number respectively , 6701 , 6703 , 6704 , 6801 , 6802 , 4701 , Built - in damper lets you control the air flow to the second 9901 , 9812 , 9824 and 6702 . These numbers are also listed room . on the furnace rating plate . Helpful Installation Information The following booklets will help you in making the installation : ANSI / NFPA 70 - 1990 or current edition " National Electrical Code . " In Canada : CSA C22 . 1 Canadian Electrical Code . American National Standard NFPA54 / ANSI Z223 . 1 1988 or current edition " National Fuel Gas Code . " Obtain from - - American National Standards Institute , Inc . , 1430 Broadway , New York , N . Y . 10018 . In Canada : CAN / CGA B149 Installation Code . m : _ m
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Safety Rules WARNING For L . IR gas , the minimum inlet gas supply pressure for the purpose of input adjustment is 11 " water col - READ THESE RULES AND THE INSTRUCTIONS umn . The maximum inlet gas supply pressure is 13 " CAREFULLY . FAILURE TO FOLLOW THESE water column . RULES AND INSTRUCTIONS COULD CAUSE A MALFUNCTION OF THE FURNACE . THIS COULD 7 . ANY SAFETY SCREEN , GUARD OR PARTS RE - RESULT IN DEATH , SERIOUS BODILY INJURY , MOVED FOR SERVICING THIS APPLIANCE MUST AND / OR PROPERTY DAMAGE . BE REPLACED PRIOR TO OPERATING THE AP - PLIANCE TO AVOID PROPERTY DAMAGE , BODILY INSTALLATION MUST CONFORM TO LOCAL CODES . IN INJURY OR DEATH . THE ABSENCE OF LOCAL CODES , INSTALLATION MUST 8 . CONFORM WITH THE NATIONAL FUEL GAS CODE , ANSI INSTALL the furnace vent directly to the outdoors , so Z223 . 1 . THE APPLIANCE , WHEN INSTALLED , MUST BE that harmful gasses will not collect inside the building . ELECTRICALLY CONNECTED AND GROUNDED IN Follow the venting instructions for your type installa - ACCORDANCE WITH LOCAL CODES OR , IN THE tion exactly . Use only the type and size of vent pipe ABSENCE OF LOCAL CODES , WITH THE CURRENT and fittings specified . NATIONAL ELECTRICAL CODE ANSI / NFPA NO . 70 . 9 . BE SURE to provide for adequate combustion and IN CANADA ventilation air . See page 6 . The flow of this air to the furnace must not be blocked . 1 . INSTALLATION MUST CONFORM TO LOCAL 10 . NEVER test for gas leaks with an open flame . Use CODES OR , IN THE ABSENCE OF LOCAL soap suds to check all gas connections . This will avoid CODES , THE CURRENT CAN / CGA B149 IN - the possibility of fire or explosion . STALLATION CODE . 11 . 2 . THE APPLIANCE , WHEN INSTALLED , MUST BE ALLOW furnace to cool before servicing . Always shut ELECTRICALLY CONNECTED AND GROUND - off electricity and gas to furnace when working on it . ED IN ACCORDANCE WITH LOCAL CODES OR , This will prevent any electrical shocks or burns . IN THE ABSENCE OF LOCAL CODES , WITH 12 . THE CURRENT CSA C22 . 1 CANADIAN ELEC - DUE TO HIGH TEMPERATURES , locate the furnace TRICAL CODE . out of traffic and away from furniture and draperies . 3 . REFERENCE IS MADE IN THIS MANUAL 13 . ALERT children and adults to the hazards of high sur - REGARDING GAS TYPE AS L . P . G . BE ADVISED face temperature and to keep away to avoid burns or THAT L . RG . IS NOT AVAILABLE IN CANADA , clothing ignition . REFER TO PROPANE / L . P . GAS . 14 . CAREFULLY supervise young children when they are in the same room with the furnace . 1 . USE ONLY MANUFACTURER'S REPLACEMENT 15 . DO NOT place clothing or other flammable material PARTS . USE OF ANY OTHER PARTS COULD CAUSE on or near furnace . INJURY OR DEATH . 2 , 16 . DO NOT install this furnace in an alcove . INSTALLATION and REPAIR must be done by a qualified service person . The appliance should be in - 3 _ DO NOT install these furnaces in a travel trailer , spected before use and at least annually by a profes - recreational vehicle or mobile home . sional service person . More frequent cleaning may be required due to excessive lint from carpeting , bedding 4 . MAINTAIN all clearances specified in section material , etc . It is imperative that control compart - " Locating Wall Furnace and Thermostat " and " Vent ments , burners and circulating air passages be kept Installation . " clean . 5 . BE SURE furnace is for type of gas to be used . Check 17 . BEFORE INSTALLING : To avoid electrical shock , turn the rating plate by the gas valve in the lower cabinet . off electrical circuits that pass through the wall where Do not change it to use other gases . Unsafe opera - you are going to install the furnace . tion could result and could cause bodily injury and death . 18 . CAUTION : Label all wires prior to disconnection 6 . For Natural gas , the minimum inlet gas supply when servicing controls . Wiring errors can cause im - pressure for the purpose of input adjustment is 5 " col - proper and dangerous operation . Verify proper oper - umn . The maximum inlet gas supply pressure is T ' ation after servicing water column . WARNING DO NOT USE THJS HEATER IF ANY PART HAS BEEN UNDER WATER . IMMEDIATELY CALL A QUALIFIED SERVICE TECHNICIAN TO INSPECT THE HEATER AND TO REPLACE ANY PART OF THE CONTROL SYSTEM I I AND ANY GAS CONTROL WHICH HAS BEEN UNDER WATER . - - 4 - -
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Unpack Your Furnace The furnace is shipped in one carton containing the fur - nace , installation instruction booklet and hardware bag . 1 . Lay carton horizontally . Remove top trim cover from its packing . Remove thumb screw at top of furnace , raise top front panel 1 / 2 inch and remove panel from cabinet . This is so you can get to the electrical con - nections later . 2 . Place these and other parts , as they are removed from furnace , where they cannot be lost or damaged before you need them . 3 . Bottom front panel can be removed by grasping just below handle and pulling it outward and then upward . See Fig . 1 . NOTE Check the burner rating plate , located in burner com - partment , to make sure your furnace is equipped to operate on the type of gas available ( either Natural or L . IRGas ) . Do NOT convert unit from Natural Gas to L . IR Gas or from L . F _ Gas to Natural . 4 . Remove all literature and package containing ther - mostat , wire and metal anchors used for free standing installation . 5 . Check the fan blade to be sure it spins freely . Basic Tools Needed 1 / 8 " Allen wrench Hand drill or properly grounded electric drill . Stud Locator or small finish nails Expansion bit 1 / 2 " to 1 - 5 / 8 " or 1 / 2 " and 1 - 1 / 2 " blade bits 1 / 8 " and 3 / 16 " drill bit ( metal ) Tin Snips 6 ft . folding rule or tape measure 8 " adjustable wrench Screwdriver ( med . blade ) 12 " adjustable wrench Screwdriver ( Phillips head ) Key hole saw or Sabre saw Hack saw Pliers ( wire cutting ) Hammer 2 - 10 " or 12 " pipe wrenches Hole Saw - 2 " Gloves and safety glasses Basic Materials Pipe and fittings to make connections to furnace ( see page 3 / 4 " Quarter Round or other wood trim molding approxi - 17 ) . mately 16 ' long or Trim Accessory 4701 is recommended . Caulking compound - silicone rubber with a temperature 2 " x 4 " x ( length as required ) Spacer Blocks ( see Close rating of 500 ° tE Off Stud Space , page 12 ) . DO NOT USE types advertised as paintable or for bath Oval Vent Kit 9901 is recommended . tub use as most contain fillers and will not withstand high Vent Enclosure Kit 9812 or 9824 if furnace is to be sur - temperatures . face mounted is recommended . Pipe Joint Compound resistant to L . P . Gases . 1 x 1 wood strips if Optional Side Outlet Grille Register Electrical wiring supplies as needed ( see page 18 ) . 6701 is used . Minimum wire size is # 14 gauge copper . - - 5 - -
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Installing Your Wall Furnace IMPORTANT The following steps are needed for proper installation and safe operation of your furnace . If you have any doubts as For satisfactory and trouble - free operation , be sure to : to any requirements , always consult your local Heating or 1 . Properly locate the furnace within the space to be Plumbing Inspector , Building Department or Gas Utility heated . Company regarding regulations , codes , or ordinances 2 . Install the furnace in accordance with local codes or which apply to the installation of a vented wall furnace . ordinances and instructions provided . Obtain professional help where needed . 3 . Maintain minimum clearance : Floor 0 inches or ceil - ing 4 inches , side wall 4 inches . For exception to The CHECK AND ADJUSTMENTS on page 24 are vital minimum side wall clearance , see Fig . 3 , pg . 7 . to the proper and safe operation of the furnace . Be sure 4 . Be sure to provide enough combustion and ventilation they are done . air . Locating Wall Furnace & Thermostat The top of the furnace must be at least 4 inches from the Consider the following points before attempting to install the furnace : ceiling . See Fig . 2 . With standard furnace discharge outlet , do not install CAUTION closer than 4 inches to intersecting wall . See Fig . 3B , Do not make cut - outs in wall or ceiling before check - page 7 . ing in the attic for ceiling joist locations and proposed When using optional kits 6703 or 6704 maintain clearances venting . as shown in Figs . 3A or 3C , page 7 . The counterflow vented wall furnaces are shipped ready When using optional kit 6704 maintain clearance as shown to install on the surface of the wall or recessed up to 9 - 1 / 4 in Figs . 3A and 3F , page 7 . Use only optional outlet and inches in the wall , with studs 16 inches center - to - center grille kits available from manufacturer . or stud space can be framed - in to 16 inches , see page 10 , Recessed Mounting . I _ [ { ' kIP _ ll Place the furnace near the center of the space to be heated for good air circulation . Do not put it behind a door or draperies . Do not install the furnace in a closet , alcove , or small hallway where the furnace could be isolated by closing doors to the heater space . See Fig . 2 for the minimum clearances . Do not install the furnace in a mobile home , trailer , or recreational vehicle . The bottom of the furnace may rest directly on a wood ore concrete floor . If floor is other than wood or concrete ther must be a piece of wood or sheet metal under the furnacee . that is at least the same size as the bottom of the furnac On recessed installations the recessed portion may have 0 inches clearance to combustible material . To provide adequate clearance and service access the front of the furnace must face the open room . Be sure that FOR EXCEPllONS gas piping and electrical wiring can be brought to the loca - TO MIN . SIDE WALL CLF _ CE tion . See sections covering piping and electrical wiring for your type of furnace mounting . _ RG . S 3A . , . 3C , ' . ' _ k 3F Furnace vent must be installed directly to the outdoors so that combustion gasses will not collect inside the building . Provide an adequate vent or flue in accordance with local codes or ordinances and instructions provided by the vent RNISHED FLOOR pipe manufacturer . O " MIN . Check the minimum spacing needs as shown in Figs . 2 and 3 , pages 6 and 7 . - - 6 - -
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Locating Wall Furnace & Thermostat ( Con't ) Choose a location for the thermostat about 5 feet above the floor on an inside wall . The thermostat wire supplied with your furnace is 20 feet long , which should be enough 0 _ I _ llM A X to run up through the attic so the thermostat can be a max - imum of 16 feet from the furnace measured in a straight line , or approximately 12 feet from the furnace if the wire _ / 4 " MIN WHEN is run under the floor . The thermostat should be sensing OPTIONAL ONE - WAY FRONT DEFLECTING average room temperature , avoid the following : GRILLE IS USED GRIU - E IS US [ D 1 _ 4 " _ . . . . , % HOT SPOTS : COLD SPOTS : B . A . 3 / 4 " _ - _ Concealed pipes or ducts Concealed pipes or ducts Fireplaces Stairwells - drafts KIT I _ 01 Registers OP _ IONA _ rWO - WA _ _ . Doors - odraftsoms REAR GRILLE 2 ¸ ' _ I TV sets Unheated r on Radios other side of wall DEAD SPOTS : Lamps Behind doors Direct sunlight 12 ¸ ' _ Kitchen Corners , and alcoves 12 " MIN WHEN OPTIONAL T W0 - WAY F _ ONT DEFL [ CTING GRILLE After picking a location that meets the requirements , check D . rS USED C . FJT 67 _ the walls , attic and roof to make sure there are no obstruc - tions such as pipes , electric wiring , etc . , which could in - OPTIONAL ON [ - _ ' _ I , _ - 3 / 4 MI % ; _ WAY f _ EAR GRILLE terfere with the installation of the furnace or vent pipe . If required , move them or pick a new location . WARNING DANGER OF PROPERTY DAMAGE , BODILY IN - _ IE - WAy JURY OR LOSS OF LIFE . DO NOT INSTALL FRONTTIONAo _ 0P _ GRILL [ - MI N FURNACE IN ANY AREA WHERE OXYGEN IS IN r2 USE . E . Combustion & Ventilation Air WARNING High humidity , especially during cold weather , may be damaging to buildings because condensation forms on DANGER OF PROPERTY DAMAGE , windows and inside walls . BODILY INJURY OR DEATH The combination of a tight energy efficient home with the THE FURNACE AND ANY OTHER FUEL BURNING use of exhaust fans , fireplaces , clothes dryers , and gas APPLIANCE MUST BE PROVIDED WITH ENOUGH appliances results in more and more air being drawn FRESH AIR FOR PROPER COMBUSTION AND from the house until fresh air may be sucked in to the VENTILATION OF FLUE GASES . MOST HOMES house down the furnace flue or fireplace chimney . WILL REQUIRE THAT OUTSIDE AIR BE SUPPLIED . Carbon monoxide can be the result . Carbon monoxide or " CO " is a colorless , odorless gas produced when fuel The high cost of energy for home heating has brought is not burned completely or when the flame does not about new materials and methods used to construct or receive sufficient oxygen . Automobiles , charcoal , wood remodel most current homes . The improved construction fires and improperly vented or air - starved coal , oil and gas and additional insulation has reduced the heat loss and furnaces or other appliances can produce carbon monoxide . made these homes much tighter around windows and doors so that infiltrated air is minimal . This creates a pro - blem to supply combustion and ventilation air for gas - fired Be aware of these air - starvation signals : or other fuel burning appliances . Any use of appliances 1 . Headaches , nausea , dizziness . that pull air out of the house ( clothes dryers , exhaust fans , fireplaces , etc . ) increases this problem and appliances 2 . Excessive humidity - heavily frosted windows , moist could be starving for air . " clammy " sensation . In addition , these energy measures mean that your 3 . Fireplace smokes , won't draw . home will retain more water vapor or a higher relative 4 . Furnace flue backs up . humidity . - - 7 - -
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Combustion & Ventilation Air ( cont . ) AIR REQUIREMENTS tion air . The doors should not fit tight . The cracks around windows should not be caulked or weather The requirements for providing air for combustion and stripped . ventilation are listed in the National Fuel Gas Code NFPA 54 / ANSI Z223 . 1 ( in Canada : CAN / CGA B149 ) . Most homes To determine if infiltration air is adequate , perform the will require that outside air be supplied to the furnace area following checks : by means of ventilation grilles or ducts connecting direct - 1 . Close all doors and windows . If you have a fire - ly to the outside or spaces open to the outdoors such as place , start a fire and wait until flames are burning attic or crawl space . The only exception is when the fur - vigorously . nace area meets the requirements and definitions for an unconfined space with adequate air infiltration . DRAFT HOOD SPILLAGE WARNING VENT PIPE _ _ L DANGER OF PROPERTY DAMAGE , BODILY INJURY OR DEATH DRAFT HOOD I _ _ MATCH THE FURNACE AND ANY OTHER FUEL BURNING APPLIANCE MUST BE PROVIDED WITH ENOUGH MATCH FRESH AIR FOR PROPER COMBUSTION AND VENTILATION OF FLUE GASES . MOST HOMES WATER WILL REQUIRE THAT OUTSIDE AIR BE SUPPLIED . DRAFT HEATER HOOD WALL OPENING FURNACE All air openings and connecting ducts must comply with the following : 2 , Turn on all exhausting devices , such as : IF THE FURNACE IS INSTALLED IN AN AREA WITH - kitchen and bathroom exhaust fans ANOTHER GAS APPLIANCE ( S ) , THE TOTAL INPUT - dryers ( gas and electric ) RATING OF ALL APPLIANCES MUST BE CONSIDERED 3 , Turn on all vented gas appliances , such as : WHEN DETERMINING THE FREE AREA RE - - heating equipment ( includes any room heaters ) QUIREMENTS FOR COMBUSTION AND VENTILATION - water heaters AIR OPENINGS . 4 . Wait ten ( 10 ) minutes for drafts to stabilize . Ducts must have the same cross - sectional area as the free area of the openings to which they connect . 5 . Check for draft hood spillage at each appliance . ( Hold a lighted match 2 inches from draft opening . The minimum dimension of rectangular air ducts must not See Fig . 4 . ) be less than 3 inches . B . No Spillage LOUVERS / GRILLES AND SCREENS Match flame pulls toward draft hood - this indicates COVERING FREE AREA OPENINGS sufficient infiltration air : If screen is used to cover opening ( s ) , it must not be smaller 1 . Return exhausting devices and appliances to the than 1 / 4 inch mesh . Use the free area of a louver or grille condition you found them . to determine the size opening required to provide the free area specified . If the free area is not known , assume a C . Draft Hood Spills 20 % free area for wood and a 60 % free area for metal louvers or grilles . If there is spillage at a draft hood ( match goes out or flame wavers away from draft hood ) : EXAMPLE 1 . 1 . Check for plugged flue connectors and chimneys . FURNACE LOCATED IN UNCONFINED SPACE . * Check and repair stoppage and test again . * An unconfined space must have a volume of a minimum 2 . If you have a fireplace , open a window or door near 50 cubic feet per 1000 Btuh of total of all appliances in the fireplace and then check for spillage . area . Adjoining rooms may be included only if there are no doors between the rooms , or if special provisions are a . If spillage stops , do not use the fireplace without made such as ventilation grilles installed between con - a nearby window or door open until you can necting rooms . supply fresh air by a permanent duct . Fig 6 , page 9 shows the minimum area in square feet , bas - 3 . If you have kitchen and bathroom exhaust fans , turn ed on 8 foot ceiling heights , required for different Btuh them off and check for spillage . input ratings . a . If spillage stops , do not use exhaust fans until A . If your furnace is in an open area ( unconfined space * ) you can supply fresh air by a permanent duct . Circuit breakers for fans should be turned off if the air that leaks through the cracks around doors and windows may be enough for combustion and ventila - possible . m8 - -
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Combustion & Ventilation Air ( cont . ) WARNING , provided with free air for proper combustion and ventila - tion of flue gases by one of the following methods . DANGER OF PROPERTY DAMAGE , A . All Air From Inside Building : BODILY INJURY OR DEATH DRAFT HOOD SPILLAGE , WITH UNOBSTRUCTED If the confined space adjoins an unconfined space as VENTS , INDICATES THAT ADDITIONAL AIR MUST defined in EXAMPLE 1 , provide two permanent openings , BE BROUGHT iNTO THE STRUCTURE FROM THE one within 12 inches of the top and one within 12 inches OUTSIDE . KEEP A WINDOW OPEN ( MINIMUM 2 of the bottom of the room connecting directly to unconfin - INCHES ) NEAR THE APPLIANCE UNTIL A PERMA - ed space . Each opening must have a free area of at least NENT AIR DUCT iS INSTALLED . 100 square inches or 1 square inch per 1000 Btuh com - bined input of appliances in one room if combined input exceeds 100,000 Btuh . 4 . Spillage means air starvation and a fresh air duct or air intakes must be installed to provide air directly WARNING to the furnace or other gas appliance . DANGER OF PROPERTY DAMAGE , D . If spillage exists or when the furnace is in a building BODILY INJURY OR DEATH of tight construction where the windows and doors are THE ADJOINING UNCONFINED SPACE MUST weatherstripped , air for combustion and ventilation HAVE ADEQUATE AIR INFILTRATION AS DEFINED must be obtained from outdoors or space open to the IN EXAMPLE 1 . outdoors . Provide an opening ( s ) having a total free area of 1 sq . FOR EXAMPLE : Your furnace is rated at 50,000 Btu per inch per 4000 Btuh of the total of all appliances . The hour . The water heater is rated at 30,000 Btu per hour . The required area is shown in Fig . 9 , page 10 under the column for ( 40,000 ) . totalis 80,000 Btu per hour . You need two grilles , each with 100 square inches of free opening . Metal grilles have about 60 % free area , so you need two metal grilles each with FRESH AIR DUCT 160 square inches of Iouvered area . HOLES FROM VENTILATED ATTIC INTO STUD SPACE Refer to Fig . 7 , page 10 , which shows grille installation . SEE FIG 8 Using the previous example , the two connecting rooms plus the closet must equal at least 500 sq . feet to handle the combined input 50,000 plus 30,000 . MINIMUM AREA IN SQUARE FEET 4000 Btuh Per Square lnch Max . Btuh * Unconfined Space Opening Min . Area In Sq . Ft . Input 8 ' Ceiling Height Round Rectangular Duct Duct AIR GRILLE TO STUD SPACE 188 4 " DIA . 3 " x3 " SQ . 30,000 219 4 " DIA . 3 " x3 " SQ . 35,000 250 4 " D [ A . 3 " x4 " SQ . 40,000 281 12 " MAXFROM FLOOR 4 " DIA , 3 " x4 " SQ . 45,000 312 4 " DIA . 3 " x5 " SQ . 50 _ 00 375 4 _ ' ' DIA 3 " x5 " SQ . 60 _ 00 HOLES FROM VENTILATED CRAWL SPACE INTO STUD SPACE SEE FIG 8 * Can be two or more rooms joined by ventilation grilles . HOLE IN BOTTOM OR BACK OF FURNACE INTO OPEN STUD SPACE OR CRAWL SPACE B . All Air From Outdoors : If confined space doesn't adjoin an unconfined space Fig . 5 shows a typical duct going into ventilated crawl ( defined in EXAMPLE 1 ) then air must be provided from space or attic . outdoors or spaces open to outdoors such as attic or crawl 1 . Duct must terminate at a point not more than 1 foot spaces . above the floor . Provide two permanent openings , one within 12 inches of 2 . Duct size must be at least 1 inch of free area for top , one within 12 inches of bottom of room connecting each 4000 Btuh of input of all appliances in area . directly , or by using ducts , with the outdoors or areas open to outdoors . EXAMPLE 2 . If opening connects directly to , or within vertical duets , FURNACE LOCATED IN CONFINED SPACE . the free area of each opening must be at least 1 square inch per 4000 Btuh combined input of appliances in area . If furnace is installed in a confined space , it must be m9 - -
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Combustion & Ventilation Air ( cont . ) If horizontal ducts are used , the free area of each open - ing must be at least 1 square inch per 2000 Btuh com - bined input of appliances in area . GRILLES CONNECTING ROOMS TO MAKE UNCONFINED SPACE * Openings for inlet or outlet air should not be made into attic area if attic is equipped with a thermostat controlled power vent . FREE AREA IN SQ . INCHES - EACHOPENING ( FURNACE ONLY ) - BASED ON ONE SQ . INCH PER 4000 8TUH Req'd Number of sHoles Furnace Sq , Inch Sill or Header Plate Btuh / Input of Opening 1 _ / 2 ' ' 2 " 3 " 7.5 7 4 2 30,000 FOR EXAMPLE : Your furnace is rated at 80,000 Btu per 8.75 8 5 2 35,000 hour . The water heater is rated at 30,000 Btu per hour . The 10.0 9 5 3 40,000 total is 80,000 Btu per hour . You need two grilles , each with 45,000 11.25 10 6 3 20 square inches of free opening , unless connected by 12.5 11 6 3 50,000 horizontal ducts which would require each grille or open - 15.0 13 8 4 60 , O00 ing to have a free area of 40 square inches . Recessed Mount Installation CUT WALL OPENING FIND THE STUDS ( See CAUTION on page 6 ) Use a stud Iocator or small finishing nails . Repeatedly Provide an opening as shown in Fig . 10 , page 11 . Work drive and remove a nail into the wall in the area of the from the top in the attic to cut away the ceiling plate . stud until it is located . Then find the inside edge of the stud . Leave the nail at this location . ATTACH HEADER PLATE MODELS : 5508331 ; 5508332 ; 6508731 ; 6508732 The other stud should be about 14 - 1 / 2 inches from the Locate header plate ( Fig . 10 , page 11 ) between wall studs one found . Drive finishing nails on the insides of this stud . at 88V2 inches from finished floor and nail into position Draw wall cut out to required size as shown in Fig . 13 , page 12 . If wall studs are not on 16 inch centers see with end flanges pointing up . " CLOSE OFF STUD SPACE , " Fig . 12 , page 12 . - - 10 - -
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Recessed Mount Installation ( cont . ) GAS SUPPLY OPENING See Fig . 10 . A hole must be drilled for the gas line supply . MODELS : 5008731 ; 5008732 Decide whether the gas line will come through the floor Locate header plate between wall studs at 821 / 2 inches or wall stud . from finished floor and nail into position with end flanges pointing up . NOTE MODELS : 3508331 ; 3508332 ; 3508731 ; 3508732 If a pre - existing gas piping stub location is not compati - ble with hole or knock - out provided in furnace , you may Locate header plate between wall studs at 74 inches from make an alternate entry hole in furnace back wall per Fig . finished floor and nail into position with end flanges point - 13 , page 12 . ing up , ALL MODELS CAUTION Hole for electrical conduit is located on left side of header Be careful not to damage any furnace components while making any alternate hole . plate as you face the wall . WARNING Locate and drill one ( 1 ) 1 - 1 / 2 inch hole at selected loca - tions per Fig . 11 and Fig . 13 , page 12 or Fig . 14 , page ! 3 . REMOVE 4x14 FIBERGLASS GASKET FROM BOT - TOM OF HEADER PLATE AND DISCARD . THIS Gas line can be run at this time or done after furnace GASKET IS NOT USED WHEN THE FURNACE IS is mounted , see section GAS SUPPLY AND PIPING , RECESSED IN THE WALL . page 17 . B / W VENT PIPE ( NOT SUPPLIED ) 7 _ r HOLD - DOWN OR N01 _ : STARTER PLATE WALL BOARD & FLOOR PLAI _ _ ( NOT SUPPLIED ) REMOVEDFOR F - / RECIE _ MOUNT ONLY _ LEXIBLE 2 " ELECTRIC , ONDUIT N THEADERE CONVENI ENCE - _ PLA OUTLET , ' - FINISH FLOOR SURFACE _ MOUNTING MOUNTING / CLOSE OFF STUD SPACE ( If Required ) If studs are not on 16 inch centers , cut the hole for the / furnace next to an existing stud and frame in the other side using a 2 x 4 and spacer blocks as required . See Fig . 12 , page 12 . f - - . j ELECTRICAL SUPPLY ROUGH - IN Run the electrical supply with the ground wire and ther - mostat cable into stud space above furnace location . - - 11 m
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Recessed Mount Installation ( cont . ) CAUTION CLOSE OFF STUD SPACE ( If Required ) Do not run wire behind flanges of header plate or in any location where it might be damaged . Avoid 7 splicing thermostat wire unless the spliced wires are PLA'I _ properly cleaned , soldered and taped . F I _ ] b - I1NG b - lUD Ill II NEW S'IUD . , _ , - FRONT TOP ELEC _ , / " CONN . 111 [ 41C " , + - - 141 / 6 " - _ - III E _ S71NG S31JDt % SPACER ] I - - 14 - _ / 8 " _ - 1 III H I . . . . . LI - 1 r - ! U - I . . . . . . If desired , the power supply and thermostat cable can come into the wall stud space from a basement , crawl space or an adjoining stud space . Terminate flexible electrical conduit at the junction box located on the underside of the header plate . Leave the wires long enough to connect inside the junction box to the convenience outlet . BOTTOM ( 1 ) MODELS : 5508331 ; 5508332 ; 6508731 ; 6508732 ( 2 ) MODELS : 5005731 ; 5008732 ( 3 ) MODELS : 3508331 ; 3508332 ; 3508731 ; 3508732 Surface Mount Installation FIND THE STUDS AND CEILING JOISTS CUT CEILING OPENING ( See CAUTION on page 6 ) Mark off and cut 3 - 1 / 2 x 12 inch rectangular hole in ceil - Find two studs at spot where furnace is to be placed . ing , centered between wall studs . The back edge of the Use a stud indicator or small finishing nails . Repeatedly opening should be about 1 / 8 inch from the wall . See Fig . drive and remove a nail into the wall in the area of the 16 , page 14 . stud until you find it . Then find one side . Leave the nail ELECTRICAL SUPPLY ROUGH - IN there . Drive another nail just on the other side of the same stud . The electrical supply openings must be made in the wall Inside edge of the other stud should be about 14 - 1 / 2 or ceiling above furnace to match holes in furnace top . inches from the one found . Drive finishing nail on inside Holes in furnace top are 1 inch from the left side of fur - edge of this stud . nace . See Fig . 13 . Using the nails as a guide , draw a line up both sides to If desired , the power supply and thermostat cable can the ceiling to locate hole cut out for vent pipe and elec - come into the wall stud space from a basement , crawl trical connections . space or an adjoining stud space . - - 12 - -
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Surface Mount Installation ( cont . ) CAUTION At selected location , drill a 1 inch hole for 115V power supply and a 1 / 2 inch hole for the thermostat cable . while making any alternate hole . I e careful not to damage any furnace components Run wiring through holes to above furnace top leaving enough excess wire to make electrical connections after mounting furnace . Locate and drill one ( 1 ) 1 - 1 / 2 inch hole at selected loca - tion per Fig . 11 , page 11 ; Fig . 13 , page 12 ; or Fig . 14 . Gas line can be run at this time or done after the furnace CAUTION is mounted , see section CONNECTING GAS LINE . Toavoid damage to wiring , be sure to route wire away from path of furnace vent . ALTERNATE GAS SUPPLY OPENING GAS SUPPLY OPENING r ; A hole may need to be drilled for the gas line supply . Decide whether the gas line will come through the floor or wall . NOTE If you decide to route gas line through right side of fur - nace , simply remove the knock - out provided in furnace side . ALTERNATE GAS SUPPLy - - - " % . _ I ) - - ' t NOTE ENTRy LOCA ] 10N If a pre - existing gas piping stub location is not compati - ? ble with hole or knock - out provided in furnace , you may GAS SUPPL _ make an alternate entry hole in furnace back wall per ENTRy HOLES Fig . 14 . General Vent Installation serves , the vent system may be completed with a type B The vent installation must comply with all local codes and gas vent , of the same manufacturer , and offsets or ordinances . If in doubt , consult your local codes or breakovers shall not be greater than 45 degrees from inspector . vertical . The furnace vent must be directed to the outdoors so that NOTE harmful combustion gases will not collect inside the building . The B / W vent must extend through the ceiling and roof terminating at least 12 feet above the finished floor on This furnace must not be connected to a chimney flue which the furnace rests . serving a separate solid - fuel burning appliance . First vent pipe offset ( if required ) is recommended not to Use U . L . listed B / W Vent Kit 9901 . You must provide other be any closer than 2 ' - 0 " from header plate . items , not contained in kit , necessary to complete your specific venting situation through the roof . Refer to typical ATTACH HEADER & HOLD - DOWN PLATE venting system shown in Fig . 18 , page 15 . ( SURFACE MOUNT ) Type B / W gas vent shall extend from the header plate of Remove the fiberglass flue collar from the furnace flue the vented wall furnace to a point above the highest ceil - extension . This gasket is not used when the furnace is sur - face mounted . ing plate within a stud space through which the vent passes , without any offsets or crossovers thei'ein . After a type B / W gas vent passes through the highest ceiling Make sure that the 4 x 4 inch gasket is in position on the plate within a stud space above the furnace which it header plate . - - 13 - -
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General Vent Installation ( cont . ) INSTALL CEILING PLATE SPACERS Discard the three ( 3 ) square gaskets , as they are not used when furnace is surface mounted . ( SURFACE MOUNT ) Slide header plate over the furnace flue extension with the Refer to Fig . 16 . junction box entering the opening in top of furnace . Only one ( 1 ) plate spacer is required for surface mount - Refer to Fig . 15 . ing within a single story dwelling . Fasten to matching holes in the furnace top through holes Cut 2 inches off each end of plate spacer . " A " in the header plate , using two ( 2 ) # 8 x 3 / 8 inch screws provided . Drill two ( 2 ) 3 / 16 inch holes in each end of plate spacer . See Fig . 18 , page 15 . Fasten the hold - down plate or starter plate to the top of the header plate using holes " B " in the header plate . Fasten plate spacer to wall by nailing through one ( 1 ) drilled hole in each end , into the wall board and ceiling plate . INSTALL CEILING PLATE SPACER j , , g , , ( RECESSED MOUNT ) Refer to Fig . 17 . Two ceiling plate spacers are in the B / W vent kit . They must be fastened along each longedge of the ceiling hole to hold the oval vent pipe in the center of the hole . ALL MODELS Nail the ceiling plate spacers either across or in between the cut out section of ceiling plate . If nailed between , ends ATTACH HOLD - DOWN PLATE ( RECESSED MOUNT ) must be bent at 90 degrees . NOTE CEILING PLATE SPACERS - RECESSED MOUNT Header plate should already be attached to wall studs . See ATTACH HEADER PLATE , page 10 and 11 . _ 14 318 Fasten hold - down plate to top of header plate using two ( 2 ) screws provided . CEILING PLATE " _ " r , _ 4 _ 3V2 CENTERED ON ! 1 a / w VENT TOP _ _ _ HOLE IN INSTALL SURFACE VENT ( SURFACE MOUNT ) NOTE HOLD - DOWN OR For surface mounting , it will be helpful to complete the gas RTER PLATE piping supply to the furnace before installing the vent pipe . See section GAS SUPPLY & PiPiNG , page 17 . r _ ( NOT SUPPLIED ) Carefully move the furnace into position under the ceiling FRONT HEADER PLATE cutout . SIDE Insert first lengths of oval , double wall vent pipe up through the ceiling cutout . - - 14 m
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General Vent Installation ( cont . ) Lower vent pipe to the hold - down plate . Push the vent TYPICAL VENT INSTALLATION pipe into the hold - down plate until it is completely 1 seated . ( Hold - down cleats will engage the groove in the Vl _ IT CAP " rOBE AMINo OF2 FT . HIGHER vent pipe . ) THANANY pOINT _ 10 FT . OF _ rr C _ Secure hold - down plate to vent pipe using two ( 2 ) screws . Using plumbers tape to secure vent to the plate spacer , nail through one ( 1 ) hole in each end of plate spacer , into the wall and ceiling plate . INSTALL FURNACE VENT ( RECESSED MOUNT ) Lower first lengths of oval , double wall vent pipe through the plate spacers to the hold - down plate . Push the vent pipe into the hold - down plate until it is com - pletely seated . ( Hold - down cleat will engage the groove in the vent pipe . ) Secure hold - down plate to vent pipe using two ( 2 ) screws . COMPLETE THE VENTING 2 E _ DS Refer to Fig . 18 . HEADER PLA1E Install oval to round adapter . Complete the piping extend - ing it through the roof . Use 4 " round , double wall ( Type B ) vent pipe , roof flashing , storm collar , and vent top as shown . The vent cap must be at least 2 feet higher than any point that is within 10 feet horizontally of the vent cap . There must be at least 1 inch clearance between the vent FLUE pipe and any combustible material . COLLAR QAS _ £ T IMPORTANT Area above header within the stud space MUST be kept clear of any attic insulation to allow the free circulation of air around oval vent piping . Mounting Your Furnace ALL OTHER MODELS To obtain adequate clearance for fastening furnace or to install gas supply fittings , it may be necessary to remove Disconnect two ( 2 ) 24 volt wires from the gas valve . the burner and control assembly as follows : Disconnect two ( 2 ) wire connectors from junction block midway on the thermocouple . Remove burner compartment door by pulling door top out and up . REMOVE BURNER AND CONTROLS Locate the air discharge shield . It is secured across the MODELS : 3508331 ; 3508332 ; 3508731 ; 3508732 top of the burner control compartment . Remove two ( 2 ) Locate the burner and screws that secure it . Remove the screws and shield and set aside . two ( 2 ) screws ( one from each end ) . Lift one end of the burner at a time until free . Remove burner and controls DISCONNECT WIRING from the compartment . MODELS 3508331 ; 3508332 ; 5508331 ; 5508332 ALL OTHER MODELS Remove the screws holding the ignition control unit and cover to the furnace casing . Locate the burner and hex nuts that secure it . Remove Disconnect wires to free control module from its mount - the two ( 2 ) hex nuts ( one from each end ) . Flip up the wire hinges . Lift one end of burner at a time until free . Remove ing location . Mark or tag each wire removed for its exact burner and controls from the compartment . reconnection . See Fig , 19 , page 16 , - - 15 - -
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Mounting Your Furnace ( cont . ) Straighten the furnace by pushing furnace bottom intothe stud space . IMPORTANT AFTER FURNACE HAS BEEN PLACED IN POSITION , MAKE SURE THE GASKETS ARE PRESSING AGAINST THE FURNACE TOP TO ELIMINATE AIR LEAKS . FASTEN FURNACE BOTTOM ( SURFACE AND RECESSED MOUNT ) 24V NOTE PV SEt6V Fasteners are not furnished because of different require - 24 ments of various types of wall construction . GND lnV Fasten furnace to floor through holes provided in furnace bottom . If you have concrete flooring , use an alternate GND fastening method . See Fig . 20 . If burner and control assembly were removed , replace them by reversing " DISCONNECT WIRING " and WILLIAMS IGNITION CONTROL " REMOVE BURNER AND CONTROLS " sections on PART NUMBER P321910 page 15 . LA707 - 01 . DWG FURNACE MOUNTING POSITION FURNACE ( RECESSED MOUNT ONLY ) - METAL ANOH ( _ NOTE TOP FASTENING If your furnace is surface mounted , your mounting was started during VENT INSTALLATION , page 13 . To complete furnace mounting , go on to FASTEN FURNACE BOTTOM on this page . II ALL MODELS I Make sure that the flue collar gasket , Fig . 18 , page 15 , is I in place over the flue extension . Check to see if header plate gaskets are in place . Hold the furnace at a slight angle ( top closer to the wall than bottom ) with the flue extension centered under the oval hole in the header plate . NOTE Electrical wiring should already be routed to the header plate . If not , see sections on ELECTRICAL SUPPLY ROUGH - IN , page 12 . Place three ( 3 ) square gaskets over the junction box . See Fig . 18 , page 15 . ALL MODELS Lift furnace up so that the flue extension enters the oval NOTE : DO NOT U _ BOTTOM DOOR _ FOR MOUNTING hole in the header plate . - - 16 - -
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Mounting Your Furnace ( cont . ) IMPORTANT over the back flange of furnace top and screwing to wall . See Fig . 20 , page 16 . TO PREVENT DAMAGE TO WIRING , MAKE SURE NOT TO PINCH THE WIRES BETWEEN FURNACE FASTEN FURNACE TOP ( RECESSED MOUNTING ) COMPONENTS . KEEP THEM ROUTED AWAY FROM THE BURNER . Fasten furnace top by drilling two ( 2 ) holes through the side flanges of furnace top and securing with two ( 2 ) Resecure the air discharge shield across the top of the screws or nails into the wall studs . See Fig . 20 , page 16 . burner and controls compartment , Small leg of " L " shape must be positioned toward floor , pointing away from front of furnace . CAUTION FASTEN FURNACE TOP ( SURFACE MOUNTING ) Be careful notto damage furnace components or wir - Fasten furnace top to wall using two ( 2 ) metal anchors ing when drilling holes , ( packed in plastic bag with thermostat ) by placing them Gas Supply and Piping GAS PIPING Gas control valve , within the furnace , is shipped with a seal over gas inlet tapping . Do not remove seal until ready The gas supply line must be of adequate size to handle to connect piping . the BTU / HR requirements and length of the run for the unit being installed . WARNING Determine the minimum pipe size from Fig . 23 , page 18 , DANGER OF PROPERTY DAMAGE , basing the length of the run from the gas meter or source BODILY INJURY OR DEATH . to the unit . MAKE SURE THE FURNACE IS EQUIPPED TO OPERATE ON THE TYPE OF GAS AVAILABLE . MODELS DESIGNATED AS NATURAL GAS ARE TO BE USED WITH NATURAL GAS ONLY , FURNACE DESIGNATED FOR USE WITH LIQUIFIED DROP I PIPED CR0UN0 JOINT PETROLEUM ( L . P ) GAS HAVE ORIFICES SIZED FOR COMMERCIALLY PURE PROPANE GAS , SSUPPLy i _ I GA aN , 0N THEY CAN NOT BE USED WITH BUTANE OR A MIXTURE OF BUTANE AND PROPANE . GAS SUPPLY For Natural gas , the minimum inlet gas supply pressure tlANUAL SHUT OFF for the purpose of input adjustment is 5 " water column . VALVE The Maximum inlet gas supply pressure is T ' water column . For L . E gas , the minimum inlet gas supply pressure for DF ( Op the purpose of input adjustment is 11 " water column . The maximum inlet gas supply pressure is 13 " water column . Gas pressure and input to the burners must not exceed the rated input and pressure shown on the rating plate . On Naturel Gas the manifold pressure should be 4 inches water column . The manifold pressure should be 10.5 inch - es water column for L . P . Gas . See page 32 for operation above 2000 feet altitude Office change may be required to suit gas supplied . Check with your local gas supplier . ORIFICE SIZES Furnace Technical Information , page 32 , shows the correct orifice sizes for the different input ratings when using Natural or L . P Gas . - - 17 - -
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Gas Supply and Piping ( cont . ) CHECKING THE GAS PIPING Test all piping for leaks . When checking gas piping to the PROPER PIPING PRACTICE furnace with gas pressure less than 1 / 2 PSI , shut off 2 IMPERFECT CONTRO L USE MODERATE AMOUNT OF DOPE manual gas valve for the furnace . If gas piping is to be checked with the pressure at or above 1 / 2 PSI , the fur - THREADS _ nace and manual shut off valve must be disconnected dur - ing testing . ( SEE WARNING BELOW . ) Apply soapsuds ( or THREAD PIPE RIGHT LENGTH LEAVE 2 END THREADS [ IARE " a liquid detergent ) to each joint . Bubbles forming indicates a leak . Correct even the slightest leak at once . All piping must comply with local codes and ordinances GAS PIPE SIZES or with the National Fuel Gas Code ( ANSI Z223 . 1 ) , whichever applies . In Canada : Follow CAN 1 - B149 Installa - NATURAL GAS tion Code . PIPE CAPACITY - BTU PER HOUR ( INCLUDES FITTINGS ) Refer to Fig . 21 , page 17 , for the general layout at the unit . PIPE SIZE It shows the basic fittings needed . LENGTH OF The following rules apply : PIPE - FEET 1 / 2 inch 3 / 4 inch 1 inch 1 . Use new , properly reamed pipe free from chips such 20 92,000 190,000 350,000 as steel or black iron pipe and fittings or other 40 63,000 130,000 245,000 approved by local codes . 60 50,000 105,000 195,000 2 . Do not thread pipe too far . Valve distortion or mal - L . P . GAS function may result from excess pipe within control . PIPE CAPACITY - BTU PER HOUR Apply moderate amount of good quality dope to pipe ( INCLUDES FITTINGS ) only , leaving 2 end threads bare . If LP Gas installation , LENGTH OF use compound resistant to action of liquified petroleum PIPE - FEET 1 / 2 inch 3 / 4 inch 1 inch gases . 20 189,000 393,000 732,000 3 . Use ground joint unions . 40 129,000 267,000 504,000 60 103,000 217,000 409,000 4 . Install a drip leg to trap dirt and moisture before it can enter the gas valve . Drip leg must be a minimum of 3 inches long . WARNING 5 . Install a manual shut - off valve . 6 . Provide a 1 / 8 NPT test gauge connection immediately DANGER OF PROPERTY DAMAGE , before the gas supply connection to the furnace . BODILY INJURY OR DEATH . NEVER USE A MATCH OR OPEN FLAME TO TEST GAS CONNECTION FOR LEAKS . NEVER EXCEED SPECIFIED If installation is for L . R Gas , have L . R installer use two - PRESSURES FOR TESTING . HIGH PRESSURES stage regulation and make all connections from storage MAY DAMAGE THE GAS VALVE AND CAUSE tank to furnace . OVER - FIRING WHICH MAY RESULT IN HEAT EXCHANGER FAILURE . LIQUID PETROLEUM Use two pipe wrenches when making the connection to ( L . P . ) IS HEAVIER THAN AIR AND IT WILL SETTLE the valve to prevent turning or damage to gas valve . IN ANY LOW AREA , INCLUDING OPEN DEPRES - Connection between manual shutoff valve and burner con - SIONS AND IT WILL REMAIN THERE UNLESS trol assembly can be made with an A . G . A . / C . G . A . design AREA IS VENTILATED . certified flexible connector if allowed by local codes . Drip NEVER ATTEMPT STARTUP OF UNIT BEFORE leg and ground joint union are still required . THOROUGHLY VENTILATING AREA . Tighten all joints securely . Electrical Wiring ELECTRICAL CONNECTION All electrical work must conform to your local codes and ordinances or in their absence , with National Electrical REMOVE FAN SHROUD Code , ANSI / NFPA 70 . If you are not familiar with wiring codes , in general , have a competent electrician do this Take out four screws holding fan shroud to side flanges job . In Canada : Follow C22 . 1 , Canadian Electrical Code . of cabinet and remove shroud . See Fig . 1 , page 5 . m18m
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WARNING LOW VOLTAGE CONNECTIONS DANGER OF PROPERTY DAMAGE , BODILY INJURY OR DEATH . CAUTION TURN OFF ELECTRIC POWER AT FUSE BOX The Heat Anticipator WILL BURN OUT if 24 voltsare OR SERVICE PANEL BEFORE MAKING ANY applied directly to thermostat by shorting out the gas ELECTRICAL CONNECTIONS . valve or primary control during testing or by incorrect INSULATE WHERE NECESSARY . wiring . ALL LINE VOLTAGE AND GROUND CONNEC - TIONS MUST BE COMPLETED BEFORE ELECTRICAL POWER IS RESTORED . WALL THERMOSTAT WIRING Run thermostat wire to the furnace . ELECTRICAL POWER SUPPLY Avoidsplicingthermostat wire unless the spliced wires are A branch circuit including this furnace must not exceed properly cleaned , soldered and taped . 15 Amperes , or run a separate 115V , 60 Hz , 15 Ampere circuit from a separate circuit breaker or fuse in your ser - Connect thermostat to two wires marked " Thermostat " vice entrance panel to the furnace junction box . Do not extending from top of furnace , using two wire nuts pro - run supply wires inside the furnace cabinet , except from vided . See Wiring Diagrams , pages 37 or 38 . the top of cabinet down to junction box . CAUTION JUNCTION BOX Do not connect 115V service line to the gas control valve or the wall thermostat . CAUTION ] Be careful not to damage the fan blade when mak - 1 ing the 115V connection to the convenience outlet . I 115V supply wiring connection is made within the upper left corner of the furnace cabinet . Locate 115V plug and push into the convenience outlet attached to the bottom of header plate . ( It protrudes through the rectangular opening in the furnace top . ) ALL MODELS Reinstall fan shroud to furnace front . Slots in fan shroud allow up / down adjustment . Make sure the fan blade spins freely . Tighten screws securely . Replace top front panel and secure with thumbscrew . Refer to paragraph covering GAS AND ELECTRICAL SUPPLY OPENINGS , page 13 . Follow Wiring Diagrams , pages 37 or 38 . If you have any doubt regarding electrical hookup , or com - pliance with code or ordinance , consult your electrical in - spector or a licensed electrician . GROUNDING A ground lug is installed for the ground connection . Use a copper conductor ( # 14 AWG ) from the unit to a ground - ed connection in the electric service panel or a properly COMPLETE WIRING DIAGRAMS ON PAGES 37 AND 38 . driven and electrically grounded ground rod . I19 - -
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Thermostat Installation 1 . If an old thermostat is being replaced and is in a ROUTE THERMOSTAT CABLE satisfactory location and the wiring appears to be in good condition , use existing wiring . If in doubt , use new wire . 2 . If a new location is chosen or if this is a new installa - tion , thermostat cable must first be run to the location selected . All wiring must agree with local codes and ordinances . These instructions cover bringing the wire down from the attic but it can be run from a basement or crawl space using similar methods . Refer to Fig . 24 . 3 . Before drilling hole in wall at selected location , drive a small finishing nail through the ceiling in the corner of the wall and ceiling above the thermostat location . Ske , AL t Pull the nail out and push a small stiff wire through the FINISH hole so it can be found in the attic . Drill a 1 / 2 inch hole NAIL TO LOCATE through the ceiling wall plate . HEADER 4 . Probe for obstructions in the partition . Then drill a 1 / 2 inch hole through wall at selected location for THERMOSIAT thermostat . CABLE 5 . From the attic , feed the thermostat cable or a stiff wire through wall until even with thermostat location . 6 . Snag thermostat cable through hole and pull cable STIFF WIRE through hole in wall so that 6 inches of cable protrudes . TO SNAG CABLE 7 . Route cable to wall furnace . MOUNTING THE THERMOSTAT ADJUST THERMOSTAT ANTICIPATOR 1 . To remove thermostat cover , squeeze both sides and Many factors affect this setting - - room size , length of ther - mostat wire , thermostat location , etc . Additional small lift . See Fig . 25 . adjustments to increase or decrease heating cycles ( 4 - 6 2 . ' Connect thermostat wires to the terminal screws on the per hour typical ) may be required . If an amp meter is thermostat base . available , see instructions supplied with thermostat . 3 . Push any excess wire back through hole in wall and plug hole with insulation to prevent drafts from affect - ing thermostat operation . 4 . Being sure to level thermostat for best appearance , fasten thermostat base to wall through mounting holes with screws provided . 5 . Replace the thermostat cover . THERMOSTAT HEAT ANTICIPATOR SQUEEZE RR _ 4LY SET THE THERMOSTAT HEAT ANTICIPATOR SOl1 " 1SIDES110 AND UFT R £ _ IO _ , _ COVER A simple method of setting the heat anticipator in a 24 - volt thermostat ( without an A . C . ammeter ) is to first read the label on the gas control valve and match its rating . t , / _ r / . . . oa . l = t _ Example : If the ampere draw for the valve is . 5 amps , NOTE set thermostat heat anticipator at the same Use heavier wire size if more than 20 ft . of wire is required . setting ( . 5 ) . ( Fig . 26 , page 21 . ) - - 20 - -
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Thermostat Installation ( ton't ) NOTE Refer to installation instructions packed in the thermostat carton if you have any doubt about the above procedures . MV " - - X . - _ J _ - LONGER When all is adjusted properly , the furnace burner should . - - - , . - 1.0 . - ' - - CYCLE HEAATN 0 , P TOR shut off slightly before the desired room temperature is reached . The stored heat in the appliance is enough to bring room temperature up to desired level . The heat SETTING ' _ u _ . - _ , . _ m anticipator thus makes it possible to maintain very close temperature control . For longer " ON " time , move anticipator clockwise . For shorter " ON " time , move anticipator counterclockwise . Optional Accessory Installation SIDE OUTLET NO . 6701 CUT WALL OPENING ( S ) REAR OUTLET NO . 6801 Make an opening ( s ) in the wall ( s ) for a Side and / or a Rear Outlet Register . See Fig . 27 . SHORT REAR OUTLET NO . 6802 CUT WALL OPENING SIDE OUTLET REAR OUTLET CAUTION II . II Use only Boots and Grilles provided by the FURNACE " BACK " manufacturer . AGAINST WALL _ ° IIs ' _ os / II CLEARANCES IMPORTANT Ill I IR , - v , - a - 1 / 4 " L _ Carefully follow all measurements and clearances given . - s / s ' ! I II ll - s / 8 " to ensure proper installation . l II 11 F1NI _ tlE9FLOOR , - J _ RNISHED FL _ When SiDE OUTLET 6701 is used , the furnace casing must be exactly 4 inches from an adjacent side wall ( except may be 3 / 4 " minimum when 1 - WAY FRONT DIFFUSING GRILLE is used ) . See Figs . 28 and 29 , page 22 . When REAR OUTLET 6801 or SHORT REAR OUTLET 6802 are used , the furnace casing must be a minimum of 12 inches from an adjacent side wall . See Figs . 3D and 3F , page 7 . CUT CASING OPENING ( S ) / 1 / 1 m ' " Before setting the furnace into position , cut a 5 x 7 inch rectangular opening for Side Register , or 7 x 11 inch open - ing for a Rear Outlet Register where marked on the fur - 3 / 4 " MIN WHEN OPTIONAl , " J _ - 6704 ONE - WAY 3 / 4 " nace casing . Cut carefully as edges must be straight and FRONT DIFFUSING smooth . See Fig . 13 , page 12 . GRILLE IS USED - - 21 - -
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Optional Accessory Installation ( cont . ) INSTALL PLASTERGROUNDS Install Plastergrounds as shown in Figs . 29 and 30 . Flanges of Plastergrounds extend the normal thickness - PLASTER GROUND of plaster . If " DRYWALL " or other thin material , flanges must be trimmed off flush with wall surface . REAR PLASTER GROUND CENTERS EXACTLY ON THE BACK OF THE HEATER t 1 / 4 ROUND METAL TRiM FILLER Press Inner Boot against furnace Inner Liner , mark and cut off flush with the wall surface . Fasten Outer Boot securely to furnace casing with screws provided . SIDE OUTLET ONLY EXACTLY 41 / 2 FROM BACK OF THE HEATER Position inner Boot against furnace Inner Liner and fasten securely through all holes with screws provided . REAR OUTLET ONLY " GROUND Ptace Inner Boot in position and fasten with screws along the top and bottom edges only . Place Damper Assembly inside Inner Boot and fasten with one ( 1 ) screw on each . _ . _ PLASTER side . Thread chain through key hole in clip on Outer Grille and attach the Bell end . 15 _ / 4 " FLOOR SIDE AND REAR OUTLETS Place Outlet Grille into position , drill through the wall material and Plasterground with a # 33 drill bit , using MOUNTING the holes in grille as a template and secure with screws provided . Refer to Fig . 31 . VENT ENCLOSURE KIT INSTALLATION BEFORE placing the furnace into position , place Out Boot ( SURFACE MOUNT ONLY ) against the furnace casing with inside of flanges exactly on edges of hole in casing . Mark hole locations on cas - Refer to Fig . 32 , page 23 . ing through the holes in Out Boot flanges Cut Side Panels to fit between the top of furnace casing Drill # 33 holes in casing at marked locations . and ceiling . Remove knockout plate and knockouts for screws from Fasten Side Panels to wall parallel to furnace casing sides . Inner Liner . Cut Front Panel height to fit . Note that the bottom edge of SIDE REGISTER ONLY Front Panel is notched to fit into the furnace casing recess . Secure a 1 x 1 wood strip ( not included in this kit ) to wall Fasten Front Panel to Side Panels with screws provided . surface next to side outlet as a backup for metal filler strips . SIDE CASING GRILLE KIT NO . 6702 Fasten metal filler strips to side of furnace casing with front surface exactly opposite front of wood backup strip . See clearances Fig . 33 , page 23 . Locate marked opening ( s ) on furnace casing . Mark SIDE AND REAR OUTLET REGISTERS and cut an opening 1 inch wider than opening already Place furnace in position . marked ( 1 / 2 inch larger on all four sides ) . See Fig . 13 , page 12 . With furnace in position , pass Outer Boot through Plaster - grounds , holding it firmly against furnace casing . Mark and Remove knockout plate and knockouts for screws from fur - cut off the end of the Outer Boot flush with the wall surface . nace inner liner . - - 22 - -
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Optional Accessory Installation ( cont . ) Fasten Boot to Inner Liner with screws provided . NOTE Using holes in grille as a template , drill two ( 2 ) # 33 holes Quarter - round wood molding may be used for trim if in out casing and fasten securely with screws provided , desired , which may be painted to match the wall . LOWER DOOR CASING CEILING JOIST B / W VENT OPTIONAL TWO - WAY DIFFUSING GRILLE 6703 : VENT C ENCLOSURE VENT ENCLOSURE FRONT _ OPTIONAL REAR DISCHARGE i ! ILING o - - 4 T W O - WAY ' ll \ \ k - , 2 OIFFU SING - - _ GRILLE KIT 6703 OPTIONA _ L _ I h _ OPTIONAL OUTLET _ II _ 0UTLET KIT6702 _ I _ ' " KIT 6702 o ( Nill KIT 470R _ OPTIONAL TRIM ST WALL WITH FASTENERS PROVIDED 2 - WAY FRONT DIFFUSING GRILLE KIT NO . 6703 Refer to Fig . 34 . CAUTION VENT COVER j For use only in conjunction with a front outlet when the furnace is spaced at least 12 inches from an in - , = = . . ] tersection wall ( see Fig . 35 ) . TRIM Metal clips on backside of grille snap into side louvers of MOULDING front warm air outlet . Adjust clips with pliers if necessary . ( OPTIONAL } Grille may also be attached with sheet metal screws . 1 - WAY FRONT DIFFUSING GRILLE KIT NO . 6704 Follow instructions for 2 - WAY FRONT DIFFUSING GRILLE 6703 above , except furnace clearance to an adjacent wall must be 3 / 4 inch minimum . See Fig . 28 , page 21 . TRIM STRIP KIT NO . 4701 INSTALL VENT COVER ( PROVIDED ) When desired , optional Trim Strip Kit may be used to cover ( RECESSED MOUNT ONLY ) the crack between furnace and wall . See Figs . 36 and 37 . Place strips tight against furnace with other edge against Place Vent Cover on top of furnace , see Fig . 37 . Press snug against wall and secure through bottom to top of furnace wall surface and fasten to wall with escutcheon pins pro - with screw provided . vided . Cut off trim strips to fit each furnace as required . - - 23 - -
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Start - Up Procedure Start the furnace using the procedures in section manometer having a scale range from 0 to 12 inches of OPERATING YOUR FURNACE . water should be used for this measurement . The manifold pressure must be measured with the burner and pilot WARNING operating . Any major changes in flow must be made by DANGER OF BODILY INJURY OR DEATH . changing the size of the burner orifice . Check with your local gas supplier for proper orifice sizing . LIQUIFIED PETROLEUM L . P . GAS IS HEAVIER THAN AIR AND IT WILL SETTLE IN ANY LOW CHECK THE GAS INPUT ( NATURAL GAS ONLY ) AREA , INCLUDING OPEN DEPRESSIONS AND IT WILL REMAIN THERE UNLESS AREA IS To measure the input using the gas meter , proceed as VENTILATED . follows : NEVER ATTEMPT START - UP OF UNIT BEFORE 1 . Turn off gas supply to all other appliances except the THOROUGHLY VENTILATING AREA . furnace . 2 , With the furnace operating , time the smallest dial on Check the furnace operation as outlined in the following the meter for one complete revolution . If this is a 2 cubic instructions . If any sparking , odors or unusual noises are foot dial , divide the seconds by 2 ; if it is a 1 cubic foot encountered , shut off electric power immediately . Recheck dial , use the time in seconds as is . This gives the for wiring errors , or obstructions in or near fan motor . seconds per cubic foot of gas being delivered to the furnace . WARNING 3 . Assuming natural gas with a heating value of 1000 Btu NATURAL GAS HEATING VALUE ( BTU PER CUBIC per cubic foot and 34 seconds per cubic foot used as FOOT ) CAN VARY SIGNIFICANTLY , THEREFORE , IT IS THE INSTALLER'S RESPONSIBILITY TO SEE determined by step ( 2 ) , then : THAT BTU INPUT TO THE FURNACE IS ADJUSTED Second per hour = 3,600 PROPERLY . FAILURE TO DO SO COULD CAUSE Input = 1,000 x 3,600 + 34 = 106,000 BTU Per Hour HEAT EXCHANGER FAILURE , ASPHYXIATION , FIRE OR EXPLOSION , RESULTING iN DAMAGE , BODILY This measured input must not be greater than the in - INJURY OR DEATH . REFER TO THE NATIONAL put indicated on the rating plate of the furnace . FUEL GAS CODE ( NFPA - 54 ) TO BE SURE THE FUR - 4 . Relight all other appliances turned off in step 1 above . NACE IS BURNING FUEL AT THE PROPER RATE . Be sure all pilot burners are operating . ADJUST PILOT BURNER Underfiring could cause inadequate heat , excessive conden - sation or ignition problems . Overfiring could cause soot - ( STANDING PILOT MODELS ONLY ) ing flame impingement or overheating of heat exchanger . Pilotflame should surround 3 / 8 inch to 1 / 2 inch of the ther - Before starting natural gas input check , obtain heating mocouple tip . Toadjust , remove pilot adjustment screw on value of gas ( BTU per cubic foot ) at standard conditions gas valve . Turnscrew counterclockwise to increase flame , from your local supplier . This factor is used in " Check the clockwise to decrease . Replace cap . Gas Input " section and procedure . CHECK THERMOSTAT CHECK GAS INPUT AND PRESSURES Check thermostat operation . When set above temperature For furnace located at elevations between sea level and shown on the thermostat , the main burner should light . 2000 feet , the measured input must not be greater than Make certain the thermostat turns off the furnace when the input shown on the rating plate of the furnace . For room temperature reaches the selected setting and starts elevations above 2000 feet , the measured input must not the furnace when room temperature falls a few degrees . exceed the input of the rating plate reduced by 4 percent MAKE SURE THERMOSTAT ANTICIPATOR IS SET for each 1000 feet that the furnace is above sea level . PROPERLY , SEE PAGE 20 . Gas supply pressure and manifold pressure with the burners operating must also be as specified on the rating plate . THERMOSTAT ( TYPICAL ) Type of Gas Manifold Pressure , In . W . C . Natural 4 LP . 10.5 Rated input will be obtained on 2500 Btu propane at 10.5 inch manifold pressure with factory - sized orfices . If LP gas having a different heating value is supplied , offices must be changed by a qualified service technician before the furnace is operated . CHECK THE MANIFOLD GAS PRESSURE SEI " _ G A tapped opening is provided in the gas valve to facilitate measuring the manifold gas pressure . A " U Tube " - - 24 m
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Operating Your Furnace STANDING PILOT MODELS * WARNING 3508731 ; 3508732 DANGER OF IGNITION FLASH 5008731 ; 5008732 AND EYE INJURY OR BLINDNESS 6508731 ; 6508732 PROTECT YOUR EYES . NEVER ATTEMPT TO NOTE : LIGHT PILOT WITH GAS CONTROL VALVE KNOB IN " ON " POSITION . FLASHBACK COULD OCCUR . For models equipped with WILLIAMS gas valve P322041Y or P322042 refer to this sheet and sheet 26 for " SAFET & LIGHTING INSTRUCTION " and " TURN GAS OFF TO APPLIANCE . " NOTE : Models 3508731 ; 3508732 are equipped with a single speed fan . For models equipped with WILLIAMS gas valve P321704 or P321705 refer to this sheet and sheet 27 for " SAFETY TWO - SPEED FAN OPERATION & LIGHTING INSTRUCTIONS " and " TURN GAS OFF TO MODELS : 5008731 ; 5998732 ; 6508731 ; 6508732 APPLIANCE . " For models equipped with WILLIAMS gas valve P322041 ( All other models refer to sheet 28 , 29 & 30 . ) or P322042 . On new installations , the gas lines will be filled with air Blower will first operate at low speed then shift to high and it may take several minutes to establish the pilot flame . speed as the furnace heats up . Keep all access doors and panels in place except for in - spection and maintenance . For models equipped with WILLIAMS gas valve P321704 or P321705 . WARNING Models are equipped with a two - rate control valve . The rate knob on the gas valve is marked " LO " and " HI . " Turn the THE SURFACE OF THE FURNACE IS HOT DUR - rate knob to the " LO " position and the room thermostat ING OPERATION . KEEP CHILDREN , CLOTHING , will operate the main burner at about 70 % of maximum FURNITURE , AND FLAMMABLE MATERIAL AWAY FROM IT . capacity , blower will operate at low speed . Turn the rate knob to the " HI " position only when a fast heat - up is desired during extremely cold weather . High operation DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE LIQUIDS OR VAPORS NEAR THE develops maximum capacity of the furnace , blower will first operate at low speed then shift to high speed as the fur - FURNACE . nace heats up . SAFETY LIMIT CONTROL IMPORTANT These furnaces are protected against unsafe operation by five automatic safety controls : ( 1 ) A safety pilot acts to shut KEEP BURNER AND CONTROL COMPARTMENT OFF the gas valve in case of pilot failure ; ( 2 ) A redundant CLEAN . gas valve ; ( 3 ) A limit switch shuts down the main burner to prevent overheating the furnace cabinet ; ( 4 ) A vent safe - ty shutoff device shuts down the main burner to protect WARNING against improper venting of combustion products . These limit switchs will reset when furnace cools ; and ( 5 ) A ther - DANGER OF PROPERTY DAMAGE mal overload protects the motor against burnout caused BODILY INJURY OR DEATH . by current surges or if anything should block the flow of IF THE FURNACE OVERHEATS OR FAILS TO air through the furnace . This switch will reset itself when SHUT OFF , CLOSE MANUAL GAS VALVE FOR THE the motor cools down and it cannot be adjusted . FURNACE BEFORE TURNING OFF ELECTRIC POWER . - - 25 - -
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FOR YOUR SAFETY , READ BEFORE LIGHTING I WARNING : If you do not follow these instructions exactly , a fire or explosion may result causing property damage , personal injury or loss of life , A , This appliance has a pilot which must be lighted by • If you cannot reach your gas supplier , call the fire department . hand . When lighting the pilot , follow these instructions exactly . C . Use only your hand to push in or turn the gas control B . BEFORE LIGHTING smell around the appliance area knob . Never use tools . If the knob will not push in or turn by hand , don't try to repair it , call a qualified serv - for gas . Be sure to smell next to the floor because some ice technician . Force or attempted repair may result in a gas is heavier than air and will settle on the floor . fire or explosion . WHAT TO DO IF YOU SMELL GAS D _ • Do not try to light any appliance or strike a match . Do not use this appliance if any part has been under • Do not touch any electric switch ; do not use any water . Immediately call a qualified service technician to phone in your building . inspect the appliance and to replace any part of the • Immediately call your gas supplier from a neighbor's control system and any gas control which has been under water . phone . Follow the gas supplier's instructions . NOTES : FOR ADDITIONAL INFORMATION REFER TO THE INSTALLATION AND OPERATION INSTRUCTION MANUAL SUPPLIED WITH THIS APPLIANCE OR CONTACT THE MANUFACTURER IDENTIFYING THE PRODUCT BY ITS MODEL NUMBER LOCATED ON THE RATING PLATE , FOUND NEAR THE GAS VALVE . LIGHTING INSTRUCTIONS 1 . STOP ! Read the safety information above . 8 . Find pilot - - follow metal tube from gas control . The pilot is mounted on side of burner . 2 . Set the thermostat to lowest setting . 9 . Turn knob on gas control counterclockwise 3 . Turn off all electric power to the appliance . J _ to " PILOT . " n 4 . Remove control access panel . 10 . Push in red reset button THERMO - JJ 5 . Turn gas control knob clockwise ( _ l _ to " OFF " . Immediately light the all the way and hold in , COUPIF _ _ . . _ POSITION - - _ RESET pilot . Continue to hold the red reset button in for about PILOT ( 1 ) minute after the pilot is lit . Release BURNER button and it will pop back up . Pilot should remain lit . If it goes out , repeat steps 5 through 10 . • If button does not pop up when released , stop and immediately call your service technician or gas supplier . • If the pilot will not stay lit after several tries , turn the gas control knob to " OFF " and call your service technician or gas supplier . 11 . Close pilot observation door , tighten wingnut ( if equipped ) . 12 . Turn gas control knob counterclockwise _ " _ to " ON " . 6 . Wait five ( 5 ) minutes to clear out any gas , then smell for Knob can be turned to " ON " only if red reset button is gas , including near the floor . If you then smell gas , stop ! up . Follow " B " in the safety information above . If you don't 13 . Replace control access panel . smell gas , go to next step . 14 . Turn on all electric power to the appliance . 7 . Loosen wingnut and open pilot observation door ( if 15 . Set thermostat to desired setting . equipped ) . TO TURN OFF GAS TO APPLIANCE 1 . Set the thermostat to lowest setting . 2 . Turn off all electric power to the appliance if service is to be performed ( if applicable ) . 3 . Remove control access panel . 4 . Push in gas control knob slightly and turn clockwise _ to " OFF ' . Do not Force . 5 . Replace control access panel . WARNING : DUE TO HIGH SURFACE TEMPERATURES - - KEEP CHILDREN , CLOTHING , FURNITURE OR ANY COMBUSTIBLE MATERIAL AWAY FROM FURNACE . IMPORTANT : KEEP BURNER AND CONTROL COMPARTMENT CLEAN . - - 26 - -
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FOR YOUR SAFETY , READ BEFORE LIGHTING I WARNING : If you do not follow these instructions exactly , a fire or explosion may result causing property damage , personal injury or loss of life . A . This appliance has a pilot which must be lighted by • If you cannot reach your gas supplier , call the fire hand . When lighting the pilot , follow these instructions department . exactly . C . Use only your hand to push in or move the selector B . BEFORE LIGHTING smell around the appliance area arm , Never use tools . If the arm will not push in or for gas . Be sure to smell next to the floor because some move by hand , don't try to repair it , call a qualified gas is heavier than air and will settle on the floor . service technician . Force or attempted repair may result in a fire or explosion , WHAT TO DO IF YOU SMELL GAS D . • Do not try to light any appliance or strike a match . Do not use this appliance if any part has been under • Do not touch any electric switch ; do not use any water . Immediately call a qualified service technician to phone in your building . inspect the appliance and to replace any part of the control system and any gas control which has been • Immediately call your gas supplier from a neighbor's under water . phone . Follow the gas supplier'a instructions , NOTES : FOR ADDITIONAL INFORMATION REFER TO THE INSTALLATION AND OPERATION INSTRUCTION MANUAL SUPPLIED WITH THIS APPLIANCE OR CONTACT THE MANUFACTURER IDENTIFYING THE PRODUCT BY ITS MODEL NUMBER LOCATED ON THE RATING PLATE , FOUND NEAR THE GAS VALVE . LIGHTING INSTRUCTIONS 8 . Find pilot - - follow metal tube from gas control . The pilot 1 . STOPT Read the safety information above . is mounted on side of burner . 2 . Set the thermostat to lowest setting . 9 . Hold lighted match at pilot 3 . Turn off all electric power to the appliance . burner . THERMO _ - 4 . Remove control access panel . 10 . Move selector arm to 5 . From " ON " position , depress and move selector " SET " position and light COUPLE _ arm on gas control to " OFF " position . Do not force . pilot . Hold in " SET " position for 1 / 2 minute after pilot is lit . PILOT GAS CONTROL NOTE : Sufficient time must be allowed BURNER SELECTOROWN for pilot flame to heat thermocouple ARM SH and hold safety magnet in locked - up position . IN * OFF " Also , time must be allowed for air to be purged POSI'nON from gas lines during first starting operation . 11 . Release selector arm , and if pilot remains lit , move selector arm to " ON " position . • If the pilot will not stay lit after several tries , move the selector arm to " OFF " and call your service technician or gas supplier . 12 . Close pilot observation door and tighten wingnut ( if equipped ) . 6 . Wait five minutes to clear out any gas , then smell for gas , 13 . Replace control access panel . including near the floor . If you then smell gas , stop ! Follow 14 . Turn on all electric power to the appliance . " B " in the safety information above . If you don't smell gas , go to next step . 15 . Set thermostat to desired setting . 7 . Loosen wingnut and open pilot observation door ( if equipped ) . TO TURN OFF GAS TO APPLIANCE 1 . Set the thermostat to lowest setting . 2 . Turn off all electric power to the appliance if service is to be performed ( if applicable ) . 3 . Remove control access panel . 4 . From " ON " position , depress and move selector arm on gas control to " OFF " position . Do not force . 5 . Replace control access panel . I WARNING : DUE TO HIGH SURFACE TEMPERATURES - - KEEP CHILDREN , CLOTHING , I FURNITURE OR ANY COMBUSTIBLE MATERIAL AWAY FROM FURNACE . IMPORTANT : KEEP BURNER AND CONTROL COMPARTMENT CLEAN . I - - 27 - -
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Operating Your Furnace ELECTRONIC IGNITION MODELS * WARNING 3508331 ; 3508332 DANGER OF IGNITION FLASH 5508331 , 5508332 AND EYE INJURY OR BLINDNESS NOTE : PROTECT YOUR EYES . NEVER ATTEMPT TO LIGHT PILOT WITH GAS CONTROL VALVE KNOB For models equipped with WILLIAMS gas valve P322043Y IN " ON " POSITION . FLASHBACK COULD OCCUR . or P322044 refer to this sheet and sheet 29 for " SAFET & LIGHTING INSTRUCTION " and " TURN GAS OFF TO APPLIANCE . " NOTE : Models 3508331 ; 3508332 are equipped with a For models equipped with WILLIAMS gas valve YP321897 single speed fan . or P321898 refer to this sheet and sheet 30 for " SAFET & LIGHTING INSTRUCTIONS " and " TURN GAS OFF TO TWO - SPEED FAN OPERATION APPLIANCE . " MODELS : 5508331 ; 5508332 ( All other models refer to sheet 25 , 26 & 27 . ) For models equipped with WILLIAMS gas valve P322043 or P322044 . THE FURNACE WORKS LIKE THIS : Blower will first operate at low speed then shift to high speed as the furnace heats up . 1 . Thermostat turns on the control module . For models equipped with WILLIAMS gas valve P321897 2 . Automatic relight system ( in module ) opens gas valve or P321898 . and electronically ignites pilot . After pilot flame has been established and proven by the control module , Models are equipped with a two - rate control valve . The rate main gas valve circuit opens and pilot lights main knob on the gas valve is marked " LO " and " HI . " Turn the burners . rate knob to the " LO " position and the room thermostat will operate the main burner at about 70 % of maximum 3 . Heat builds up in the furnace and starts the fan . The capacity , blower will operate at low speed . Turn the rate heated air comes out the front bottom Iouvered panel at floor level . knob to the " HI " position only when a fast heat - up is desired during extremely cold weather . High operation 4 . When the thermostat setting is reached , it shuts off the develops maximum capacity of the furnace , blower will first main burner . operate at low speed then shift to high speed as the fur - nace heats up . 5 . The fan runs until the heat is removed from furnace , then it turns off . IMPORTANT WARNING KEEP BURNER AND CONTROL COMPARTMENT THE SURFACE OF THE FURNACE IS HOT DUR - CLEAN . ING OPERATION . KEEP CHILDREN , CLOTHING , FURNITURE , AND FLAMMABLE MATERIAL AWAY FROM IT . SAFETY LIMIT CONTROL These furnaces are protected against unsafe operation by On new installations the gas lines will be filled with air and three automatic safety controls : ( 1 ) The electronic ignition it may take several minutes to establish the pilot flame . system ; ( 2 ) A limit switch shuts down the main burner to prevent overheating the furnace cabinet ; this limit switch Keep all access doors and panels in place except for in - will reset when furnace cools ; ( 3 ) A thermal overload pro - spection and maintenance . tects the motor against burnout caused by current surges or if anything should block the flow of air through the fur - nace , the switch will turn the main burner off . When motor cools down , this switch will reset itself . This switch can - WARNING not be adjusted . DANGER OF PROPERTY DAMAGE , BODILY INJURY OR DEATH IF THE FURNACE OVERHEATS OR FAILS TO SHUT OFF , CLOSE MANUAL GAS VALVE FOR THE FURNACE BEFORE TURNING OFF ELECTRIC POWER . - - 28 - -
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FOR YOUR SAFETY , READ BEFORE LIGHTING WARNING : If you do not follow these instructions exactly , a fire or explosion I may result causing property damage , personal injury or loss of life . I • If you cannot reach your gas supplier , call the fire A . This appliance is equipped with an ignition device which department . automatically lights the pilot . Do not try to light the pilot by hand . C . Use only your hand to push in or turn the gas control knob . Never use tools . If the knob will not push in or B . BEFORE LIGHTING smell around the appliance area turn by hand , don't try to repair it , call a qualified serv - for gas . Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor . ice technician . Force or attempted repair may result in a fire or explosion . WHAT TO DO IF YOU SMELL GAS O . Do not use this appliance if any part has been under • Do not try to light any appliance or strike a match . • Do not touch any electric switch ; do not use any water . Immediately call a qualified service technician to phone in your building . inspect the appliance and to replace any part of the • Immediately call your gas supplier from a neighbor's control system and any gas control which has been under water . phone . Follow the gas supplier's instructions . NOTES : FOR ADDITIONAL INFORMATION REFER TO THE INSTALLATION AND OPERATION INSTRUCTION MANUAL SUPPLIED WITH THIS APPLIANCE OR CONTACT THE MANUFACTURER IDENTIFYING THE PRODUCT BY ITS MODEL NUMBER LOCATED ON THE RATING PLATE , FOUND NEAR THE GAS VALVE . LIGHTING INSTRUCTIONS 8 , t . STOP ! Read the safety information above , Turn the gas control knob counterclockwise _ ' I to " ON " . 2 . Set the thermostat to lowest setting . 3 . Turn oft all electric power to the appliance . 9 . Replace control access panel . 4 . This appliance is equipped with an ignition device which 10 . Turn on all electric power to the appliance . automatically lights the pilot . Do not try to light the pilot 11 . Turn thermostat to on ( HEAT ) position . Set thermostat by hand . higher than room temperature . Pilot will automatically 5 . Remove control access panel . light and main burner ( s ) will light in approximately 45 6 , Turn gas control knob clockwise ( _ ! _ to " OFF " , seconds . NOTE : On initial start - up or after prolonged shot down , GAS CONTROL _ several ignition cycles may be required to purge gas KNOBSHOWN ! > F _ . lines . To accomplish the recycle - repeat steps 6 through 11 until pilot is established . 12 . Set thermostat to desired setting . 13 . After the room thermostat turns the system off , a delay of approximately one minute is required before the system can be turned on again . 14 . If the appliance will not operate , follow the instructions " To Turn Off Gas To Appliance " and call your service technician or gas supplier . 7 . Wait five ( 5 ) minutes to clear out any gas , then smell for gas , including near the floor . It you then smell gas , stop ! Follow " B " in the safety information above . If you don't smell gas , go to next step , TO TURN OFF GAS TO APPLIANCE 1 . Set the thermostat to lowest setting . 2 . Turn off all electric power to the appliance if service is to be performed . 3 . Remove control access panel . 4 . Push in gas control knob slightly and turn clockwise [ _ , to " OFF " . Do not Force . 5 . Replace control access panel . WARNING : DUE TO HIGH SURFACE TEMPERATURES - - KEEP CHILDREN , CLOTHING , FURNITURE OR ANY COMBUSTIBLE MATERIAL AWAY FROM FURNACE . IMPORTANT : KEEP BURNER AND CONTROL COMPARTMENT CLEAN . - - 29 - -
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FOR YOUR SAFETY , READ BEFORE LIGHTING I WARNING : If you do not follow these instructions exactly , a fire or explosion may result causing property damage , personal injury or loss of life . A . This appliance is equipped with an ignition device which • If you cannot reach your gas supplier , call the fire automatically lights the pilot . Do not try to light the pilot department . by hand . C . Use only your hand to push in or move the selector B . BEFORE LIGHTING smell around the appliance area arm . Never use tools . If the arm will not push in or for gas . Be sure to smell next to the floor because some move by hand , don't try to repair it , call a qualified gas is heavier than sir and will settle on the floor . service technician . Force or attempted repair may result in a fire or explosion . WHAT TO DO IF YOU SMELL GAS D . • Do not try to light any appliance or strike e match . Do not use this appliance if any part has been under • Do not touch any electric switch ; do not use any water . Immediately call a qualified service technician to phone in your building . inspect the appliance and to replace any part of the • Immediately call your gas supplier from a neighbor's control system and any gas control which has been under water . phone , Follow the gas supplier's instructions . NOTES : FOR ADDITIONAL INFORMATION REFER TO THE INSTALLATION AND OPERATION INSTRUCTION MANUAL SUPPLIED WITH THIS APPLIANCE OR CONTACT THE MANUFACTURER IDENTIFYING THE PRODUCT BY ITS MODEL NUMBER LOCATED ON THE RATING PLATE , FOUND NEAR THE GAS VALVE , LIGHTING INSTRUCTIONS 1 , STOP ! Read the safety information above , 8 . Move selector arm to " ON " position . 2 . Set the thermostat to lowest setting . 9 , Replace control access panel . 3 , Turn off all electric power to the appliance . 10 , Turn on all electric power to the appliance . 4 . This appliance is equipped with an ignition device which 11 . Turn thermostat to " ON " ( HEAT ) position . Set thermostat automatically lights the pilot . Do not try to light the pilot higher than room temperature . Pilot will automatically by hand . light and main burner ( s ) will light in approximately 45 5 . Remove control access panel . seconds , 6 . From " ON " position , depress and move selector arm on NOTE : On initial start - up or after prolonged shut down , gas control to " OFF " position , Do not force . several ignition cycles may be required to purge gas lines . To accomplish the recycle - repeat steps 6 GAS CON'n _ OL through 11 until pilot is established . SELECTOR 12 . ARM SHOWN Set thermostat to desired setting . IN " OFF " 13 . After the room thermostat turns the system off , a delay POSI'NON of approximately one minute is required before the system can be turned on again . 14 . If the appliance will not operate , follow the instructions " To Turn Off Gas To Appliance " and call your service technician or gas supplier . Wait five ( 5 ) minutes to clear out any gas , then smell for gas , including near the floor . If you then smell gas , stop ! Follow " B " in the safety information above . If you don't smell gas , go to next step . TO TURN OFF GAS TO APPLIANCE 1 . Set the thermostat to lowest setting . 2 . Turn off all electric power to the appliance if service is to be performed . 3 . Remove control access panel . 4 . From " ON " position , depress and move selector arm on gas control to " OFF " position . Do not Force . 5 . Replace control access panel . WARNING : DUE TO HIGH SURFACE TEMPERATURES - - KEEP CHILDREN , CLOTHING , FURNITURE OR ANY COMBUSTIBLE MATERIAL AWAY FROM FURNACE . IMPORTANT : KEEP BURNER AND CONTROL COMPARTMENT CLEAN . - - 30 - -
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How To Care For Your Furnace PILOT BURNER WARNING DANGER OF BODILY INJURY OR DEATH Light pilot using instructions in OPERATING YOUR FURNACE ( on pages 25 through 30 , depending on your TURN OFF ELECTRIC POWER SUPPLY AT model ) . Leave thermostat at lowest setting . DISCONNECT SWITCH , FUSE BOX OR SERVICE PANEL BEFORE REMOVING ANY DOORS OR Pilot flame should surround 3 / 8 to 1 / 2 inch of the thermo - ACCESS OR SERVICE PANELS FROM UNIT . couple tip . Refer to Fig . 42 , Page 32 . If flame needs adjusting , do it as follows : ADJUST PILOT BURNER ( see Fig . 42 , page 32 ) CABINET FINISH 1 . Remove screw cover over pilot adjusting screw . Clean cabinet with damp rag . Never use abrasive cleaners . 2 . Insert small screwdriver , Adjust flame as needed . Turn Cabinets are finished in heat resistant baked enamel - DO screw counterclockwise ( _ ) to increase flame , NOT refinish with wall paint . clockwise ( _ ) to decrease . 3 . Turnthermostat to highest setting . Main burnersshould light quickly and smoothly . Turn thermostat to lowest COMBUSTION AND VENTILATION AIR setting . Main burners should go out . Pilot should re - The combustion and ventilation air supply must not be main lit except for electronic ignition models . blocked . 4 . Replace screw cover over pilot adjusting screw . Do not put anything in or on the furnace cabinet . BURNER FLAME Start the furnace and let it operate about 10 minutes then For better circulation and more effective heating , do not look at the burner flame . Flames should be soft and blue , place obstructive furniture closer than four feet to the front see Fig . 40 . If flames appear abnormal , contact the gas of the cabinet or two feet to the side of the cabinet . company or a qualified service technician immediately . FURNACE AREA VENTING SYSTEM Keep the area near the furnace clear and free from com - Make sure that no parts of the vent air system are block - bustible materials , gasoline , and other flammable liquids ed or rusted . Clean or replace before using furnace . and vapors . MAIN BURNER FLAME PATTERN ANNUAL UPKEEP NEEDED It is recommended that a qualified service technician per - form these checks at the beginning of each heating season . CLEANING AND OILING Shut off electricity , then remove cabinet door and front panel . Clean any lint or dirt from fan blades , fan motor , and exposed air passages . Use a brush . Put 5 drops of SAE 20 oil in each of the two cups or oil tubes on the fan motor , See Fig . 39 , below . CORRECT MOTOR OIL HOLES OIL 1UBES OR OIL CUPS ON EACH _ ND OF MOTOR FAN MOTOR INNER CONES LIGHT BLUE POINTED TOP le4SUFflCiENE AIR LONG OPEN OUTER MANTLE LIGHT BLUE ENI ) ( _ ONES YELtOW IN COLOR PROPER FLAME I / 2 Io 3 / 4 HIGH - - 31 - -
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How To Care For Your Furnace ( Con't ) BURNER CLEANING Refer to " Mounting Your Furnace " section ( pages 15 , 16 and 17 ) . Check burner . If cleaning is required , contact a qualified service technician to clean and service burner . Check the spark gap . It must be carefully adjusted to specifications as illustrated ( Fig . 42 ) for ignition device to function properly . WARNING DANGER OF BODILY INJURY OR DEATH MAKE SURE ELECTRIC POWER AND GAS PILOT FLAME AND SPARK GAP SUPPLY ARE OFF BEFORE REMOVING PANELS OR DOORS , ETC . PILOT • 3 / 8 TO 112 HOOD CLEANING BURNER COMPARTMENT SENSOR SLIGHTGE ORAN TIP Because cold air is attracted to the flame during furnace operation , a build up of lint from bedding and dust , etc . , ELECTRODE TYPICAL in the burner area will occur each heating season . It is TYPICAL BLUE CONE N _ TUBRLAULE GCOASNE - - LP GAS NATURAL necessary to clean this area regularly . Use a vacuum cleaner with a narrow attachment to reach small areas . Be careful in and around the pilot . A change in its adjust - ment could be made if struck during cleaning . NATURAL BURNER GAS CASTING TO REMOVE BURNER ( S ) Disconnect gas line inside cabinet . Furnace Technical Information INPUT * * RATING MAIN BURNER ORIFICE MODEL TYPE NUMBER GAS HI - FIRE LO - FIRE DRILL DEC . QTY . 3508732 NAT # 38 . 1015 1 35,000 24,500 3508731 L . F : # 52 . 0635 1 35,000 24,500 3508332 NAT # 38 . 1015 1 35,000 24,500 35O8331 L . I _ # 52 . 0635 1 35,000 24,500 5008732 NAT # 43 . 089O 2 50,000 35,000 50O8731 L . P # 54 . 0550 2 50,000 35,000 NAT # 42 . 0935 2 5508332 55,000 38,500 L . R # 54 . O550 2 5508331 55,000 38,500 NAT # 38 . 1015 2 6508732 65,000 45,500 L . P # 52 . 0635 2 6508731 65,000 45,500 * * For elevations above 2000 feet reduce ratings 4 % for each 1000 feet above sea level The efficiency rating of these appliances is a product thermal efficiency rating system determined under continuous operating conditions and was determined independently of any installed system . m32 - -
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Troubleshooting Chart FOR MODELS : 3508731 ; 3508732 ; 5008731 ; 5008732 ; 6508731 ; 6508732 SYMPTOM CORRECTIVE ACTION POSSIBLE CAUSE ( S ) a . Thermocouple producing insuffi - a . Check pilotflame - - mustimpinge onthermocouple . Pilotflame 1 . Pilot willnot stay lit after following lighting cient millivoltage . maybe loworblowing ( high ) causing safetyto dropout . Pilo _ orifice instructions . or aeratinghole maybe plugged ( check for spiders , webs or other organic material ) . Be sure the thermocouple is fully insertedin bracket . b . Loose or dirty thermocouple b . Clean and / or tightenthermocouplefitting atconnectionto valve . connection at gas valve . c . Thermocouple defective . C . Check thermocouplewithmillivoltmeter - - shouldgenerateap - proximately30 millivolts when not connected to load . When con - nectedto load , should generateapproximately14millivolts . If below 7 miilivolts , replace . d . Thermomagnet pilot safety d . Replace gas valve after above is checked out . defective . e . Vent safety shutoff device . e . Check wiringconnectionsfrom valve to vent safetyshutoffdevice . Be sure all connections are tight . Check for blocked vent . 2 . Main burner will not come a . Gas valve not turned ON . a . Turngasvalve knob to " ON " position - - if no main gas flow , pro - ceed to Step . " b " . ON - - pilot burning and thermostat set for heat . b . b . Electric power to furnaceturned Check forline voltage at furnace - - if okayand no main gasflow , OFE proceed to Step " c " . C . Check for24 volts at the lowvoltage terminals of thetransformer . c . Low voltage transformeror limit switch defective . If novoltage , turn OFFelectric power to furnace . Removeone wire from limit switch and check for continuity across both terminals . No continuity - - replacelimit switch . With a good limit switchback in the circuitand the electric power turned ON - - if no voltage , replace transformer . NOTE : Before replacing the transformer or limit switch , check wiring for loose connections or broken wires and repair as needed . If voltage is present at transformer , pro - ceed to Step " d " . d . Wall thermostat defective . d . With thermostat set for heat ( contacts closed ) checkfor voltage at terminals on gas valve . If no voltage is present replace defec - tive thermostat . NOTE : Before replacing thermostat , be sureto checkwiring from furnace to thermostat for loose connectionsor broken wiresand replace as needed . If voltage is present at terminals on gas valve and still nogas flow to main burners , proceed to Step " e " . e . e . Burner orifice plugged . Clean or replace orifice - - if okay and still no gas flow to main burners , proceed to Step " f " . f . Gas valve defective . f . Replace defective gas valve . " 3 . Burner comes " ON " but a . a . Defective wiring . Turn OFF electric power to furnace . Remove top front panel , fan goes OFF before blower shroud and blower wheel . Refer to Wiring Diagram and check all turns ON . wiring inside junction box . Remove center front panel and check all wiring inside switch box containing fan , limit and selectorswit - ches . Correct if necessary . If correct , proceed to Step " b " . NOTE : Selectorswitch used only on Models 5008731 ; 5008732 ; 6508731 : 6508732 . b . Defective limit switch . b . If burner goes OFF in less than five minutes from room temperaturestart , check limit control switch . If defective , replace . NOTE : Blower should turn " ON " within three minutesafter burner is " ON " froma room temperaturestart . If not , proceedto Step " c " . * Also applicabLeto Models equipped with an electric intermittent pilot system . ( continued next page ) - - 33 - -
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Troubleshooting Chart FOR MODELS : 3508731 ; 3508732 ; 5008731 ; 5008732 ; 6508731 ; 6508732 SYMPTOM CORRECTIVE ACTION POSSIBLE CAUSE ( S ) 3 . Burner comes " ON " but C . c , Defectivemotor ( 2 - speed ) . Jumperacross fan switch , turnelectric powerON , motor should goes OFF before blower rotate . A 2 - speedmotor is used - - jumper from " brown " terminal on fanswitchto # 2 ( red ) terminalon selectorswitch , motorshould turns ON . ( cont . ) rotateon " LOW " speed . Jumperfrom same " brown " terminalon fan switchto # 3 ( black ) terminalon selectorswitch , motorshould rotateon " HIGH " speed . Replace motor if defective . d . d . Defective motor ( 1 - speed ) . Jumper across fan switch , turn electric power ON , motor should rotate . Replace motor if defective . e . Defective fan switch . e . If , after checkingabove possibilities , problem still exists , replace fan switch . a . * 4 . Burnercomes " ON " , blowe a . Furnace not operating at full Check for low gas pressure atgas valve - - should be 4 " W . C . for rate . Natural Gas , 11 " W . C . for L . R Gas . Check burner orifice . comes " ON " , but cyclese " ON " and " OFF " whil burner remains " ON " . a . * 5 . Burner comes " ON " , a . Furnace operating over - rate . Check for high gas pressure at gas valve - - correctif necessary . blower comes " ON " , but See correct pressure above . burner cycles " OFF " and . b . b . Line voltage too low . Check line voltage to motor , if below 115volts motor will run too " ON " with blower " ON " s _ ow . c . Recirculation . C , Heated air discharging against an object causing recirculation , such as a hall installation or a large piece of furniture within 4 ' of discharge . d , d . Loss of circulating air due to Check headerplate installation and proper use of gaskets . Repair leakage . as necessary . a . Thermostat location . a . " 6 . Furnace operates but turns Check location of thermostat . It should not be in the path of warm " OFF " before room tem - air discharge from furnace , near a lamp , or above a TV set or stereo . perature is attained . b . Defective thermostat . b . Check thermostatcalibration or replace . a . * 7 . Furnace operatesbut will not a . Thermostat wiring defective . Check thermostat wiringfrom furnace to thermostat - - may be shut " OFF " when room shorted together by a nail or staple . temperature is attained . b . Thermostat location , b . Check thermostat location - - if an outside wall or a hole in wall behind thermostatcausingcold air to contact thermostat , relocate . C . c Improper thermostat anticipator Set anticipator per THERMOSTATANTICIPATOR , page 20 . setting . a . Blower noise . * 8 . Abnormal operation . Check motor mounts - - they may be loose . Blower wheelcould be out of balance Setscrew may be looseon motor shaft . Blower may be rubbing on fan shroud . Motor may need oiling . Correct as needed . b . Expansion noise ticking , Check installation - - casing may be twisted or not level at time of installation causing combustion chamber to bind on its locating pros c . Burnerresonance . Usually associated with L . R Gas operation . Adjust primary air screw = nthroatof each cast iron burner after about 10 minutes of operation . Adjust to obtain a soft blue flame without streaming yellow tips , d . Seleclor switch defective . During normal furnace operation motor will be on " LOW " speed ( 2 - speed ) . when operatingon minimum inputcapacity and on " HIGH " speed whenoperating on maximum input capacity . Ifthere is no change in motor speed , replace selector switch . " Also applicableto Models with an electric intermittent pilotsystem . - - 34 - -
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Troubleshooting Chart FOR MODELS : 3508331 ; 3508332 ; 5508331 ; 5508332 CORRECTIVE ACTION SYMPTOM POSSIBLE CAUSE ( S ) 1 . Nospark - - nopilotgas . a . No main powe _ a . - e . Perform normalsystemchecks of main power , transformert , her - mostat , limit switch , and replace faulty component . b . Faulty transformer . With power ON , turn thermostatto the lowestsetting , wait 10 c . Faulty thermostat . seconds and return to HIGH setting . With power ON and ther - mostatset at its highest position , set voltmeterto 24V scale and d . Faulty limit switch . attach probes to terminals " TR " and " TH " on the ignition con - trol unit . e . Faulty ignitioncontrol . If you read 24V and there still is no sparkor pilot gas , the igni - tion controlis defective and must be replaced . f . Faulty wiring . f . Test wiring . Repair or replace . g . Vent safety shutoffdevice . g . Check wiring connectionsfromvalve tovent safetyshutoffdevice , be sure all connectionsare tight . Check for blocked vent . a . See le . 2 . Spark - - but no pilot gas , a . Faulty ignition . b . No gas supplied to pilot valve . b . Check for availabilityof gas at gascontrol . Makesure the manual valve ( gas cock ) on the gas control are in the full ON position . No pilot gas could be caused by a plugged pilot tubing . Also check the pilot adjustment at the gas control . c . See 2b . c . Manual valves in OFF position . d . See 2b . d . Faulty pilot valve . e . See lf . e . Faulty wiring . f . See 2b . f . Restricted pilot line or clogged pilot orifice . 3 . Pil _ gas - - but no spark . a . Faulty ignitioncontrol . a . With power ON , turn thermostat to the lowest setting , wait 10 secondsand return1ohighsetting Withpower ONand thermostat set at its highest position , set voltmeter to 24V scale and attach probes to terminals " 24V " ( * TH ) and " GRD " ( ' TR ) on the igni - tion control unit . If you read 24V and there is still no spark or pilot gas , the ignition control is detective and must be replaced . With thermostat turned to its highest setting , set test meter to 24Vscale.Touchprobes to " PV / MV " and " PV " terminals on Gas Valve . If you do not get a 24V reading , check wiring . If wiring tests okay , check ignition control . Connect probesto " PV / MV " AND " PV " terminals on ignitioncon - trol . If youdo not read24V , the ignition control must be replaced . b . Broken or shorted electrode Remove wire at " PV / MV " terminal at the ignition control , being assembly . careful not to touch any metal parts ; disconnect the electrode wire at the ignition control . Connect one end of a jumper wire to terminal " GND " ( DO NOT REMOVE EXISTING WIRE . ) At - tach the other end of the jumper wire to the metal blade of a smal ! screwdriver . Position end of metal blade approx . 1 / 8 " from ter - minal . Reconnect " PV / MV " terminal Sparking should occur be - tween screwdriver blade and terminal If no sparking occurs , the ignition control must be replaced . Check the pilot and electrode assembly for proper electrodegap ( 3 / 32 " to 1 / 8 " ) or any possible shorting of electrode 1osurroun - ding metal surfaces . Make sure the spark ignitor and electrode connections to the ignition control are tight . The ignition control and pilot burner musl both be chassis ground . If there is still no spark , the pilot and electrode assembly must be replaced . ( continuednextpage ) - - 35 - -
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Troubleshooting Chart FOR MODELS : 3508331 ; 3508332 ; 5508331 ; 5508332 SYMPTOM CORRECTIVE ACTION POSSIBLE CAUSE ( S ) a , See 3a . 4 . Pilotlit , butmainburner a . Faultyignitioncontrol . won't come ON . b . See if . b . Faultywiring . C . c . Low pilot flame . NOTE : Waitat least90 secondsafter pilotlightsbefore doing the check out procedures for problem number 4 . With thermostatON , be sure that the pilot and sensor are prop - erly aligned so that the pilot flame impinges the top 3 / 4 inch of the sensoi _ Be sure that the sensor is pushed allthe way into pilot bracket . Adjustpilot flame with pilot adjustment , if necessary . Also check inlet supply pressure and pilot orifice , if pilot hOOdor sen - sor is bent , the defective unit should be replaced . If main burner still won't comeON , make sure the main burner orifices are clear : . If orifices are clear , set voltmeter to 24V scale and touch probes to the terminals of the main gas operator : on the gas valve . Attach to terminal " MV " , " PV / MV " on Gas Valve . If you read24V and theburner won't turn ON , replace entire gas valve . d , d . Improper alignment of sensor in Whenmain burnercomesON , ensure thatthepilot flame is strong , sensor is properly aligned , and pilot flame impingesthe top 3 / 4 pilot flame . inch of the sensor : ( Seeproceduresforcheck for proper pilot flame and alignment in problem 4c . ) Check the pilot and electrode assembly for proper electrode gap ( 3 / 32 " to 1 / 8 " ) or any possi - ble shorting of electrodeto surrounding metal surfaces . Make sure the spark ignitor and electrode connections to the ignition con - trol are tight . The ignition control and pilot burner must both be chassis ground . _ fthere is still no spark , the pilot and electrode assembly must be replaced . e . BE SURE POWER IS " OFF " , BEFORE PERFORMING THIS e . Faulty flame sensor . TEST ! ! Settest meter to " ohm " scale or use continuity checker . Touch one end of probes to top of flame sensor , the other to " SENSE " terminal onthe ignitioncontrol . Ohmmeter should read " 0 " , continuity should be evident . If you don't obtain a reading , removewiring from sensor and test both individually , If continui - ty is not evident , replace wiring and / or sensor . There should be NOcontinuity between sensor and " GND " ter - minalontheignition control , Testingwiring and sensorindividually , determine which is shorted on ground . Replace or repair . Turn ON power . a . See 2b . PiJot cycles OFF and ON a . Faulty pilot valve . by itself , b . See lf . b . Faulty wiring . Main burner shuts down a . See 4c . a . Lowpilotflame . before thermostat is b . See 4d . b . Improperalignmentof sensor in satisfied . pilotflame . C , c . Pilot flame being drawn away Whenmainburner comes ON , ensurethat the pilot flame is strong , from sensor sensor is properly aligned and pilot flame impingesthe top 3 / 4 inch of the sensor . ( Seeprocedures for checking for proper pilot flame and alignment in problem 4d . ) If the pilot flame is drawn away from the sensor when the main burner comes " ON " , the cause could be the manual valve is not in the full ON position or the inlet gas pressure with the main burner ON . NOTE : Low inlet gas pressure to the gas control can be caused by several problemsand is notwithin the scope of the procedures outlined in this service guide Consult your local utility or gas supplier : d . See 6c . d . Improper heat anticipator Check the setting of the heat anticipator in the wall thermostat . setting . Set it to setting specified on the gas control . e . The system may be cycling on a faulty limit . Using a test meter e . Faulty limit . set to the 110volt scale , check for a voltage reading across the limitwhen the main burner shuts OFF . If you get a 24volt or 110 volt reading on shutdown , replace defeclive limit switch . - - 36 - -
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Wiring Diagrams FOR MODELS : FOR MODEL _ 5508331 and 5508332 3508331 ond 3508332 FOR 55M B . T . U . FOR 35M B . T . U . FAN TYPE VENTED WALL FURNACE FAN TYPE VENTED WALL FURNACE WITH INTERMITTENT IGNITION CONTROL SYSTEM WITH INTERMITTENT IGNITION CONTROL SYSTEM L1 • 115V BOHZ _ 19 L1 1.2 HOT 115V 80HZ NEUT FAN SWITCH FAN _ TCH _ TGPI ' v ' 3 _ w _ L COM 115V TR _ S . FLAME UMIT SWITCH r'mor _ • SENSOR SENSOR • @ THERMOSTAT IGN + 1 i I _ 10 O i TO + II PV ( P ) 7 z4v / mD 0 , , . v / Pv O _ - - r - _ O Z4V / GNDO , SENS 0 - - _ ; PV / _ IV ( C ) PVA = V ( c ) PV 0 MV ( M ) VENTETY PV O - 0 _ ( _ 0 VENT 24V 0 _ GAS SAF 24V O " SAFETY GAS SHUT OFF Mv0 L VALVE SHUT OFF VALVE MV O - DE _ CE s _ s O _ _ 0 IGN0 - - - DE'V1CE IGNO - IN'W . RMITW . NT IGN . IN1T - , RMI3 ' TENTIGN . CONTROL MODULE CONTROL MODULE LE _ NOTES : NOTES : m FACTORY _ LINE VOLTA _ - . 1 . Ifanyoftheoriginalwireassupplisd - - FACTORY _ LOW VOLTAGE . withtheappliancehastobereplac - _ FACTORy _ L _ VOLTAGE . 1 ffanyoftheoriginaJwireassupplied I / 4 . QUICK CONNECT " I _ UNAL ed , useonly 18 Ga . , 4 / 64 insulation , - - FA _ WM _ £ D LOW VOLTAGE . with the appliance has to be replac - FOR FACTORY V _ RtNG . 105 ° C . AWM copper wire or its 1 / / 4 QUICK CONNECT " I _ RMINAL ed , useonly 18Ga . , 4 / 64insulation , FACTORY WIRING . 105 ° C . AWM copper wire or its _ RE CONNECTOR FOR FACTORY equivalent 115V - 60Hz . - lessthen ' _ 4RINQ LINE VOLTAGE * 3 amps V4RE CONNECTOR FOR FAC'F ( _ Y equivalent 115V - 60Hz . - lessthan 2 . MOTOR IS THERMALLY OVER - _ R _ O LINE VOf . TA _ - 3 amps . SCREW / _ LOW _ OLTAGE , LOAD PROTECTED . 2 . MOTOR IS THERMALLY OVER - LOAD 115V 60Hz - LESS THAN 3 AMPS . ( _ SCREW " J _ E _ NAL LOW _ 31 . TAGF - PROTECTED . 115V . 60Hz - LESS THAN 3 AMPS " THERMOSTAT _ CONV . OU'I1 . . ET " n - IERMOSTAT r _ ] cONV - oUR - ET D D SPNtK GAP - - ARK 7 / ' G : 2 - oTR _ 1 / ELECTRODE _ _ 7 / a , r - - FSPA _ K S _ TCH @ uv ( _ ) - - " _ R - - BLACK ' t / - - 2 " - ' ff49 - T - - _ w - - Qg - I ' _ - uv ( M ) . _ = i _ . , ' = " l _ QN " 1 , VENT SAFETY _ 1 VENT SAFETY Z ] N'R _ MIT'Jl _ T IGNITIONCON _ I _ OLMODULESHUT OFF DEVICE NTERMIT _ T IGNITION CONTROL MODULE SHUT OFT " DEVICE - - 37 - -
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Wiring Diagrams FOR MODELS : { : ' OR MODELS : 5008731 and 5008732 3508731 and 3508732 6508731 ond 6508732 FOR 50M AND 65M B . T . U . FOR 35M B . T . U . FAN TYPE VENTED WALL FURNACE FAN TYPE VENTED WALL FURNACE WITH CONTINUOUS PILOT CONTROL SYSTEM WITH CONTINUOUS PILOT CONTROL SYSTEM u / / _ . z " I . T . oq - , sv . , z I _ r _ _ . oTo . I UMIT SWITCH ( _ TRANS . T = , , T I TO THE3 _ MOSTAT TO " IHE _ OSTAT l J - BLOCK " IN _ MOe _ UPI . E THERMOCOUPLE VENT _ _ SHUT OFF D SHUTOFFDE _ _ _ LE _ NOTES : LIEG _ qD NOTES : I FACTORY _ UN = ' VOLTAGE . 1 . Ifanyoftheorigina / wireassupplied - _ , FAC'R _ Y _ L _ IE VOLTAGE . 1 . Itanyof theoriginalwireassupp _ ied - - FACTORY _ R _ LOW _ 3LTAGF - . . wi ( h the appliance hasto be replac - - - FACTORY t _ RIED LOW VOLTAGE . with the appliance has to be replac - 1 / ' 4 QI _ C _ C _ CT " i _ AL ed , useonly 18Ga . , 4 / 64insula5on , EZ ] 1 / ' 4 QU ] C _ C _ NNECT " RE _ MINAL ed , useonly 18 Ga . , 4 / 64 insulation , F _ - _ ORy _ 105 ° C , AWM copper wire or its FACTORY ' / _ RJN P _ 105 = C AWM copper wire or its WIRE CQNNECTOR FOR FACTORy equivalent 115V - 60Hz . - lessthan _ RE CONNECTOR FOR FACTORY equivalent 115V - 60Hz , - less lha _ _ P _ NG lINE VOLTAGE . 3 amps , • IRSNG LINE VOLTAGE . 3 ampsR MOTO IS THERMALLY OVER - 2 MOTOR IS THERMALLY OVER - _ ERMJNAL LOW VIO _ TAG _ . LOAD PROTECTED . SCREW " I ] B _ . MINAL LOW VOLTAGE . 2 LOAD PROTECTED . 115V 60Hz - LESS THAN 3 AMPS . 115V . 60Hz LESS THAN 3 AMPS . THERMOSTAT [ _ CONV . OU _ THERMOSTAT _ . _ ] CONVO , U1LEr ON HEADER ON HEADER - ( : ) R _ . - _ BROWN BLUE 1 211t 11t UMIT SWITSH 1 2 BLOCK " I'HERMOCOUPLE - - BLOCKTHERMOCOUPLE TR TH VENT SAFELY 8LAOK . / YELLOW ( ' _ VENT SAF'E - - W GAS VALVE SHUT oFF DEVICE et . Aa < . / " Y _ EU . OW _ SHUT OFF DEVlC £ - - 38 - -
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Williams Top Vent Gas - Fired Wall Furnace REPAIR PARTS FOR MODELS 3508331 ; 3508332 ; 3508731 and 3508732 CABINET and BODY ASSEMBLY 28 16 28 17 18 19 20 3O 5 33 32 35 _ 4 USE ONLY MANUFACTURER'S AUTHORIZED PARTS FOR PARTS LIST SEE PAGES 41 AND 42 . - - 39 - -
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Williams Top Vent Gas - Fired Wall Furnace CONTROL ASSEMBLY FOR MODELS 3508731 and 3508732 FOR PARTS LISTING SEE PAGE 42 1 USE ONLY MANUFACTURER'S AUTHORIZED PARTS CONTROL ASSEMBLY FOR MODELS - 3508331 and 3508332 FOR PARTS LISTING SEE PAGE 42 - - 40 - -
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Williams Top Vent Gas - Fired Wall Furnace REPLACEMENT PARTS LIST FOR MODELS 3508331 ; 3508332 ; 3508731 and 3508732 PART NO . FOR MODEL : REF . NO . DESCRIPTION 3508332 3508731 35O8331 3508732 1 12C10 12C10 12C10 Outer Casing , Less Front Panel 12C10 2 tnner Liner 12B15 12B15 12B15 12B15 3 12C18 12C18 12C18 12C18 Heating Element 4 12B49 12B49 12B49 Bottom Front Panel 12B49 5 12B50 12B50 12B50 Top Front Panel 12B50 6 Fan Shroud 12B03 - 1 12B03 - 1 12B03 - 1 12B0 _ 1 7 Vent Cover 7B12 7B12 7B12 7B12 8 Draft Hood 12B12 12B12 12B12 12B12 9 Switch Box tlB05 tlB05 11B05 11B05 10 Center Front Panel 12C21 12C21 12C21 12C21 11 3508331 3508332 3508731 3508732 Internal Wires ( All Except Ign . Control ) 12 Header Plate 7B57 7B67 7B57 7B57 13 Junction Box 12B05 12B05 12B05 12B05 14 Gasket - Element Base P026500 P020500 P026500 P026500 15 Draft Hood Gasket P107900 P107900 P107900 P107900 18 Flue Collar Gasket P027100 P027100 P027100 P027100 17 Fan Blade P300500 P300500 P300500 P300500 18 Motor P322544 P322544 P322544 P322544 19 7B46 7B46 7S46 7B40 Motor Support ( 2 Req , ) 20 P022800 P022800 P022800 P022800 Vibration Isolators ( 4 Req . ) 21 Transformer , 116V - 24V P024200 P024200 P024200 P024200 22 Limit Switch P309600 P309600 P309600 P309600 23 Fan Switch P200200 P200200 P200200 P200200 24 Switch Box Cover 11C68 11C68 11C68 11C68 28 Limit Switch P321127 P321127 P321127 P321127 25 Deflector Baffle Handte 11C63 11C63 11C63 11C63 27 7A68 7A68 7A68 7A68 Header Gasket ( 3 Req . ) 27A 7Al17 7Al17 7A117 7Al17 Lower Element Base Angle 28 * Vent Enclosure Bide ( 2 Req . ) 9812 9812 9812 9812 29 _ r Vent Enclosure Front 28 - * Vent Enclosure Side ( 2 Req . ) 9824 9824 9824 9824 29 * Vent Enclosure Front 30 * Rear Grille , Two - Way 31 * Plaster Ground 32 * Rear inner Boot , 10 - 3 / 4 Inches Long 6801 6801 6801 6801 33 * Damper 34 * Rear Outer Boot , 10 Inches Long 3O Jr Rear Grille , Two - Way 31 J , Plaster Ground 32 6802 6802 6802 6802 * Rear Inner Boot , 1 - 5 / 8 Inches Long 33 * Damper 34 _ , Rear Outer Boot , 7 / 8 Inches Long 36 * Diffusing Grille Kit Two - Way 6703 6703 6703 6703 35 * Diffusing Grilte Kil - One - Way 6704 8704 8704 8704 * Trip Strip Kit ( Not Shown ) 4701 4701 470 ! 4701 * Oval B / W Vent Kit ( Not Shown ) 9901 9901 9901 9901 " _ Not available separately , in kit form only . For part illustration see pages 39 and 40 Note : Screws and bolts are standard hardware items , available locally ( continued on next page ) - - 41 - -
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Williams Top Vent Gas - Fired Wall Furnace REPLACEMENT PARTS FOR MODELS 3508531 ; 3508332 ; 3508731 AND 5508752 PART NO . FOR MODEL : REF . NO . DESCRIPTION 3508331 3508332 3508731 3508732 36 - - P322041 Valve , WILLIAMS Nat . - - P322043 Valve , WILLIAMS L . P . G . P322044 - - P322042 37 Manifold 12A01 12A01 12A01 12A01 38 P090500 P090500 Orifce Fitting , Specify Model & Gas P090500 P090500 39 P026200 P026200 Locknut P026200 P026200 40 P179800 Pilot , Cast Iron Burner , Robertshaw LP . G . P229200 - - - - P179700 Pilot , Cost Iron Burner , Robertshow Net . - - P229100 - - P321837 Pilot , Formed Steel Burner , Robertshaw Nat . - - P229300 41 Junction Block Thermocouple - - P321828 P321828 41 Flame Sensor P271100 P271100 - - - - 42 Burner , Cast Iron , Nat . or L . P . G . P025600 P025600 P025600 P025600 - - 7C52 - - 7C52 Burner , Formed Steel , Net . Gas Only P322017 P322017 P322017 P322017 43 Thermostat 44 P321910 P321910 - - - - Ignition Control 45 P321522 P321522 - - - - Wire Assembly 46 P321935 P321935 - - - - Wire Assembly 47 P321887 P321887 P321888 P321888 Manifold Adopter 48 7C79 7C79 - - - - Ignition Control Shield 49 - - - - P321935 P321935 Wire Assembly ( 2 Required ) 31B036 31B036 - - - - Ignition Control WIres ( Not Shown ) NOTE : Screws ond bolts are standard hardware items , available locally . For ports illustration see page 40 . - - 42 - -
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Williams Top Vent Gas - Fired Wall Furnace REPAIR PARTS FOR MODELS 5008731 ; 5008732 ; 5508331 ; 5508332 ; 6508731 and 6508732 CABINET and BODY ASSEMBLY 16 28 26 33 34 32 1 • 5 36 8 39 40 41 37 USE ONLY MANUFACTURER'S AUTHORIZED PARTS FOR PARTS LIST SEE PAGES 45 AND 46 . - - 43 - -
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Williams Top Vent Gas - Fired Wall Furnace CONTROL ASSEMBLY FOR MODELS 5008731 and 5008732 6508731 and 6508732 FOR PARTS LISTING SEE PAGE 46 USE ONLY MANUFACTURER'S AUTHORIZED PARTS CONTROL ASSEMBLY FOR MODELS - 5508331 and 5508332 FOR PARTS LISTING SEE PAGE 46 - - 441
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Williams Top Vent Gas - Fired Wail Furnace REPLACEMENTPARTSFORMODELS5008731 5008732 ; 5508331 ; 5508332 ; 6508731 AND 6508732 REF . PART NO . FOR MODEL : NO . DESCRIPTION 5008731 5008732 5508331 5508332 6508731 6508732 7055 - 4 7055 _ t 7C55 - 3 7C55 - 3 7C55 - 3 7C55 - 3 1 Outer Casing , Less Front Panel 2 Inner Liner 11B46 11B46 7879 7B79 7879 7B79 7C54 - 3 7054 - 3 7069 7C69 7C68 7C68 3 Heating Element 7D10 7D10 7D10 7D10 7D09 7D09 € Relief Opening Pan 7B126 78126 7B126 7B126 7B126 7B126 5 Top Front Panel 6 Center Front Panel 11060 11060 11059 11C59 11059 11059 11805 11805 7 Switch Box 11B05 11B05 11B05 118O5 8 Limit Switch P200300 P200300 P296001 P296001 P200300 P200300 P213400 P296201 P296201 9 Selector Switch P213400 P296201 P296201 P200200 P200200 10 Fan Switch P200200 P200200 P200200 P2O020O 11 Bottom Front Panel 11B103 11B103 11B103 11B103 11B103 118103 P026500 P026500 P026500 P026500 > 026500P02650C 12 Element Base Gasket 13 Fan Shroud 78106 78106 7B106 78106 78106 78106 P028300 P028300 : P028300 P02830C 14 Relief Pan Gasket = 028300 P028300 15 Vent Cover 7812 7B12 7812 7812 7B12 7812 7A68 7A68 7A68 7A68 7A68 7A68 16 Header Gasket ( 3 Req . ) 17 Flue Collar Gasket P027100 P027100 P027100 P027100 P027100 P027100 7811 € 78114 7B57 7B57 7857 7B57 18 Header 19 Limit Switch P321127 P32t127 P321127 P321127 P321127 P321127 11068 11068 11068 11068 11068 11068 20 Switch Box Cover 7Al17 7Al17 7Al17 7Al17 7Al17 7Al17 21 Lower Element Base Angle P024200 P02 € 200 P024200 P024200 P024200 P024200 22 Transformer , 115V / 24V 7B29 7B29 23 Junction Box 7829 7829 7B29 7829 5008731 5008732 5508331 5508332 6508731 6508732 2 ¢ Internal Wires ( All Except Ign . ControI 25 Vibration Isolators ( 4 Req . ) P022800 P022800 P022800 P022800 P022800 P022800 7B € 6 7846 7B46 7846 7846 7B46 26 Motor Support ( 2 Req . ) P062101 P062101 P321601 P321601 27 Motor P062101 P062101 28 Fan Blade P200600 P200600 P200600 P200600 P014300 P014300 11063 11063 11063 11063 11063 11063 29 Deflector Baffle Handle 30 _ Vent Enclosure Side ( 2 Req . ) 9812 9812 9812 9812 9812 9812 31 _ Vent Enclosure Front 30 _ r Vent Enclosure Side ( 2 Req . ) 9824 9824 9824 9824 9824 9824 31 " JrVent Enclosure Front 32 • Rear Grille , Two - Way 33 _ r Rear Outer Boot , 10 " Long 6801 6801 3 ¢ _ Plaster Ground 6801 6801 6801 6801 35 _ Rear Inner Boot , 10 - 3 / 4 " Long 36 _ " Damper 32 _ " Rear Grille , Two - Way 33 _ ' Rear Outer Boot , 7 / 8 " Long 34 _ Plaster Ground 6802 6802 6802 6802 6802 6802 35 . kRear Inner Boot , 1 - 5 / 8 " Long 36 11rDamper 6705 6705 6703 6703 6703 6703 37 _ Diffusing Gril ] e Kit ( Two - Way ) 6704 6704 6704 6704 6704 37 _ Diffusing Grille Kit ( One - Way ) 6704 i NOTE : Screws and bolts are standard hardware items , available locally . " k Not available separately , in kit form only . For parts illustration see pages 4.3 and 44 . m45 - -
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Williams Top Vent Gas - Fired Wall Furnace REPLACEMENT PARTS FOR MODELS 5008731 ; 5008732 ; 5508531 ; 5508332 ; 6508751 AND 6508732 PART NO . FOR MODEL : REF . NO . DESCRIPTION 5008731 5008732 5508331 5508332 6508731 6508732 38 _ Side Inner Boot , 10 - 3 / 4 " Long 39 _ rSide Outer Boot , 10 " Long 6701 6701 6701 6701 6701 6701 40 , k Side Plaster Ground 41 • Side Grille 38 _ r Side Inner Boot , 1 " Long 6702 6702 6702 6702 67O2 67O2 41 _ r Side Grille 4 - 701 4701 4 - 701 4 - 701 4 - 701 _ " _ " Trim Strip Kit ( Not Shown ) 4701 9901 9901 9901 _ " _ Oval B / W Vent Kit ( Not Shown ) 9901 9901 9901 42 Manifold 7B80 7B80 7B80 7B80 7B80 7B80 P090500 P090500 P090500 4 - 5 Orifice Fitting , Specify Model & Gas ( 2 Req . ) P090500 P090500 P09050C P026200 P026200 P026200 P026200 P026200 44 Locknut ( 2 Req . ) P02620C 45 Valve , _ LLIAMS Nat . P32204 - 1 - - P322043 P322041 P32204 - 2 - - P322044 - Valve , WILLIAMS L . P . O . P32204 - 2 46 Thermostat P322017 P322017 P322017 P322017 P322017 P322017 47 Junction Block Thermocouple P321828 P321828 - - P321828 P321828 47 Flame Sensor - - P271100 P271100 48 Pilot , Cast Iron Burner , Robertshow LP . G . P179800 - - P229200 P179800 Pilot , Cast Iron Burner , Robertshaw Net . P179700 - - P229100 P179700 Pilot , Formed Steel Burner , Robertshaw Not . P321837 - - P229300 P018 ! 00 P018100 P018100 P018100 P018100 P018100 4 - 9 Burner Spacer , Cast Iron Burner ( 2 Req . ) Burner Spacer , Formed Steel Burner ( 2 Req . ) P230500 - - P230500 P025600 50 Burner , Cost Iron , Nat . or L . P . G . ( 2 Req . ) P025600 P025600 P025600 P025600 iP025600 Burner , Formed Steel , Nat . Gas Only ( 2 Req . ) 7C52 7C52 - - P321910 P321910 51 Ignition Control 52 Wire Assembly - - P321524 - P321524 53 Wire Assembly - - P32204 - 8 P32204 - 8 54 - Wire Assembly ( 2 Req . ) P322048 P32204 - 8 - - P322048 P32204 - 8 P321888 P321888 P321887 P321888 P321888 55 Manifold Adapter P321887 56 Ignition Contro ; Shield - - 7C79 7C79 57 Ignition Control Wires ( Not Shown ) - - 31B036 31B036 NOTE : Screws and bolts are standard hardware items , available locally . • " Not available separately , in kit form only . For parts illustration see pages 4,3 and 44 .
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Notes
Page: 48

Service Hints If your furnace fails to work right , you may avoid inconvenience and the cost of a service call by checking the following points before you call for service . FOR YOUR SAFETY FOR YOUR SAFETY owners Do not store or use gasoline If you smell gas : or other flammable vapors and 1 . Open windows . manual liquids in the vicinity of this or any 2 . Don't touch electrical . 3 . Extinguish any open flame . other appliance . 4 . Immediately call your gas supplier . SERVICE POSSIBLE CAUSE WHAT TO DO If fan motor is noisy - - Housing rattling . Tighten screws . MODEL NOS . Clean fan blade . Fan dirty . Fan blade bent . Replace fan blade . Oil motor . 3508331 Motor bearings need oiling . 3508332 If fan does not run - - Fuse blown or tripped circuit Replace fuse or reset breaker . 3508731 breaker . 3508732 Oil motor . Motor bearings need oiling . 5008731 If your furnace is not heating or 5008732 not giving enough heat - - Fuse blown or tripped circuit Replace fuse or reset breaker . 5508331 breaker . 5508332 Reset thermostat to desired Thermostat is not set correctly . setting . 6508731 Air flow restricted . Check that doors , drapes or 6508732 furniture are not blocking furnace louvers . If your furnace short cycles - - Thermostat anticipator not set Set anticipator ( See Page 20 ) . correctly . If your furnace pops and cracks - - Heat exchanger expansion and Normal condition , especially contraction , with newer furnaces . See troubleshooting section for more detailed information . How to Order Repair Parts When ordering repair parts , always give the following All parts listed herein may be ordered from your equip - information : ment supplier . 1 . MODEL NUMBER The Model Number of your Williams wall furnace will be 2 MFG . DATE CODE found on the rating plate near gas valve , inside control 3 PART NUMBER compartment . 4 PART DESCRIPTION WILLIAMS FURNACE COMPANY MANUFACTURED 225 Acacia Street IN THE U . S . A . Colton , CA 92324 USA Established 1916 ( 909 ) 825 - 0993 FAX : ( 909 ) 824 - 8009 © 1998 The Williams Furnace Company Rev 6 / 98 Printed in U . S . A . P321005
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