HOME OWNER’S INFORMATION High Efficiency Condensing Gas .

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HOME OWNER’S INFORMATIONHigh EfficiencyCondensing Gas FurnaceOur products are designed, tested and built in accordance with DOE standardized procedures; however, actual operatingresults and efficiencies may vary based on manufacturing and supplier tolerances, equipment configuration, operatingconditions and installation practices.NOTE TO INSTALLER:This manual must be left with the equipment user.USER: Please read all instructions in the manual andretain all manuals for future reference.!WARNINGFIRE OR EXPLOSION HAZARDFailure to follow safety warning exactly could result inpersonal injury, death, or property damage.Do not store or use gasoline or other flammable vapors andliquids in the vicinity of this or any other appliance.WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance. Do not touch any electrical switch; do not use anyphone in your building. Leave the building immediately. Immediately call your gas supplier from a neighbor’sphone. Follow the gas supplier’s instructions. If you cannot reach your gas supplier, call the firedepartment.Installation and service must be performed by a qualifiedinstaller, service agency or the gas supplier.!WARNINGCARBON MONOXIDE POISONING HAZARDFailure to follow this warning could result in personal injuryand/or death.Carbon Monoxide is invisible, odorless, and toxic! Install acarbon monoxide alarm in your home, even if you do notown a gas appliance. Locate the carbon monoxide alarm inthe living area of your home and away from gas appliancesand doorways to attached garages. Follow the alarmmanufacturer’s instruction included with the alarm.Illustrations and photographs are only representative. Some product models may vary.!WARNINGELECTRICAL OPERATION HAZARDFailure to follow this warning could result in personalinjury, death, or property damage.Do not use this furnace if any part has been underwater. A flood damaged furnace is extremelydangerous. Attempts to use the furnace can result in fireor explosion. A qualified service agency should becontacted to inspect the furnace and to replace all gascontrols, control system parts, or electrical parts thathave been wet, or the entire furnace if deemednecessary.!WARNINGELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARDUse of the AHRI Certified TM Mark indicates amanufacturer’s participation in the program. Forverification of certification for individual products,go to www.ahridirectory.org .Failure to follow this warning exactly could result indangerous operation, serious injury, death or propertydamage.Improper servicing could result in dangerous operation,serious injury, death or property damage.S Before servicing, disconnect all electrical power to furnace.S When servicing controls, label all wires prior todisconnecting. Reconnect wires correctly.S Verify proper operation after servicingSpecifications subject to change without notice.440 02 4501 001/17/2019

TABLE OF CONTENTSFURNACE COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . .IMPORTANT FACTS (DO’S AND DON’TS) . . . . . . . . . . . .SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . .BEFORE STARTING YOUR FURNACE . . . . . . . . . . . . . .STARTING YOUR FURNACE . . . . . . . . . . . . . . . . . . . . . . .STEPS FOR STARTING YOUR FURNACE . . . . . . . . . . .SHUTTING DOWN YOUR FURNACE . . . . . . . . . . . . . . . .MINIMUM AND MAXIMUM TEMPERATURESETTING FOR YOUR FURNACE . . . . . . . . . . . . . . . . . . .PERFORMING ROUTINE MAINTENANCE . . . . . . . . . . . .FILTERING OUT TROUBLE . . . . . . . . . . . . . . . . . . . . . . . .COMBUSTION AREA AND VENT SYSTEM . . . . . . . . . . .WINTERIZATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .BEFORE YOU REQUEST A “SERVICE CALL” . . . . . . . .MAINTENANCE CHECKLIST . . . . . . . . . . . . . . . . . . . . . . .222444666778910FURNACE COMPONENTS(Furnace shown in upflow position; may be used in downflowor horizontal orientation or applications. Vent Elbow may beturned to a different position, depending on type ofinstallation)Figure 1Furnace ComponentsGAS BURNERHOT SURFACEIGNITER MANUAL RESETROLLOUT SWITCHWARNING!FLAMESENSORMANUAL RESETROLLOUT SWITCHFIRE OR EXPLOSION HAZARDGAS VALVEMAIN LIMIT SWITCH(BEHIND GAS VALVE)OPERATING INSTRUCTIONSNOT SHOWN (LOCATED ONMAIN FURNACE DOOR, SEEOPERATING INSTRUCTIONSINSIDE DOOR FIGURE).INDUCER MOTORASSEMBLYFailure to follow warnings could result in personal injury,death, or property damage.Keep insulation and combustible materials clear of furnaceand maintain clearances shown on unit clearance label.Do not keep combustible materials, gasoline, and otherflammable liquids or vapors around your furnace.ELECTRICAL JUNCTIONBOX (IF REQUIRED,LOCATION MAY VARY)BLOWER DOORSAFETY SWITCHSAFETY CONSIDERATIONSBLOWER ANDMOTORFURNACECONTROLBOARDCAPACITOR/POWER CHOKERATING PLATE NOT SHOWN(LOCATED ON BLOWER DOOR)A170127REPRESENTATIVE DRAWING ONLY, SOME MODELS MAY VARY IN APPEARANCE.IMPORTANT FACTS (DO’S AND DON’TS)S DO: READ AND UNDERSTAND THIS MANUAL.S DO: Have your furnace and vent system inspected annuallyby a qualified service technician.S DO: Inspect your filter monthly and clean or replace whenneeded.S DO: Provide adequate airflow to the furnace for efficientcombustion and safe ventilation.S DO: Keep your furnace free and clear of combustiblematerial.S DO: Keep your furnace free and clear of insulating material.Some materials may be combustible. Examine the furnacearea when the furnace is installed or when insulation isadded.S DO NOT: Keep combustible materials, gasoline, and otherflammable liquids or vapors around your furnace.2S DO NOT: Cover your furnace in any manner.S DO NOT: Store anything (including trash or debris) near yourfurnace.S DO NOT: In any way block or restrict airflow around yourfurnace.S DO NOT: In any way block or restrict airflow to your supply airand return air grills.S DO NOT: Use your furnace room as a broom closet or a placeto store any kind of chemical or cleaner.S DO NOT: Contaminate the air used for combustion of yourfurnace with any kind of chemical or fumes. This could alsocause heat exchangers or components to deteriorate.NOTE: These chemicals or fumes are present in manyproducts around the home, such as: water softener salts, anytype of household cleaning product, any type of laundryproduct, adhesives, paints, varnishes, paint strippers, waxesand plastics, etc.During remodeling be sure the combustion air is fresh anduncontaminated. If these compounds are burned in yourfurnace, the heat exchangers may deteriorate.NOTE: The qualified installer or agency must use onlyfactory authorized replacement parts, kits, and accessorieswhen modifying this product.This furnace contains safety devices which must be manuallyreset. If the furnace is left unattended for an extended periodof time, have it checked periodically for proper operation. Thisprecaution will prevent problems associated with no heat,such as frozen water pipes, etc. See “Before You Request aService Call” section in this manual.Installing and servicing heating equipment can be hazardousdue to gas and electrical components. Only trained andqualified personnel should install, repair, or service heatingequipment.Untrained personnel can perform basic maintenancefunctions such as cleaning or replacing air filters. All otheroperations must be performed by trained service personnel.Observe safety precautions in this manual, on tags, and onlabels attached to the furnace, and other safety precautionsthat may apply.Recognize safety information. This is the safety alert symbol. When you see this symbol on the furnace and ininstructions or manuals, be alert to the potential for personalinjury.Understand the signal words DANGER, WARNING, andCAUTION. These words are used with the safety alertsymbol. DANGER identifies the most serious hazards whichwill result in severe personal injury or death. WARNINGsignifies hazards which could result in personal injury ordeath. CAUTION is used to identify unsafe practices whichwould result in minor personal injury or product and propertydamage. NOTE is used to highlight suggestions which willresult in enhanced installation, reliability, or operation.S Your new gas furnace may have been installed in one of twoways, as a direct vent (2 pipe, Figure 2) application or as anon direct vent (1 pipe, Figure 3) application.Specifications subject to change without notice.440 02 4501 00

S In a direct vent (2 pipe) application, your furnace uses airfrom outside the home for combustion and vents flue gas tothe outdoors. This type of application will have two pipesrunning from the furnace to the outdoors (see Figure 2). Inthis application, the vent and air intake pipes must terminateoutside the structure and must not be obstructed in any way.In some cases, the inlet air pipe may be located in an areathat has access to outdoor air, such as an attic. In all cases,the outlet vent pipe must be routed to the outdoors. Do notbock or obstruct air openings on furnace or spaces aroundfurnace.S In a non direct vent (1 pipe) application, your furnaceuses air from adjacent to the furnace for combustion andvents flue gas to the outdoors. This type of application willhave only one pipe running from the furnace to the outdoors.(see Figure 3) The other pipe will terminate in the samespace as the furnace and is the source of combustion air foryour furnace. Therefore, the furnace must not be enclosed inan airtight room or be sealed behind solid doors. It must haveadequate airflow for efficient combustion and safeventilation. Do not obstruct the combustion air pipe in anyway. The vent pipe must terminate outside the structure andmust not be obstructed in any way. Do not block or obstructair openings or space around furnace.!Figure 3L11F047S Keep the area around your furnace clear and free ofcombustible materials, gasoline, and other flammable liquidsand vapors.!WARNINGFailure to follow instructions could result in severe personalinjury or death due to carbon monoxide poisoning, ifcombustion products infiltrate into the building.Check that all openings in the outside wall around the vent(and air intake) pipe(s) are sealed to prevent infiltration ofcombustion products into the building.Failure to follow this warning could result in personal injury,death, or property damage.Do not keep combustible materials, gasoline, and otherflammable liquids or vapors around your furnace.Figure 4Check that furnace vent (and air intake) terminal(s) are notobstructed in any way during all seasons.NO Combustible materials nearfurnaceExterior Vent PipesL11F046440 02 4501 00WARNINGFIRE OR EXPLOSION HAZARDCARBON MONOXIDE POISONING HAZARDFigure 2Interior Combustion Air PipeS Do not cover the furnace, store trash or debris near it, or inany way block the flow of fresh air to the unit.In addition to the safety rules above, make sure that thefollowing combustion air requirements are met for non directvent applications:S Combustion air must be clean and uncontaminated withchlorine or fluorine. These compounds are present in manyproducts around the home, such as: water softener salts,laundry bleaches, detergents, adhesives, paints, varnishes,paint strippers, waxes, and plastics.S Make sure the combustion air for your furnace does notcontain any of these compounds. During remodeling be surethe combustion air is fresh and uncontaminated. If thesecompounds are burned in your furnace, the heat exchangersmay deteriorate.S A furnace installed in an attic or other insulated space mustbe kept free and clear of insulating material. Examine thefurnace area when the furnace is installed or when insulationis added. Some insulation materials may be combustible.Specifications subject to change without notice.3

!SWARNINGNever attempt to manually light the burners with amatch or other source of flame.Figure 6FIRE AND EXPLOSION HAZARDDo Not Light Burner with MatchFailure to follow this warning could result in personalinjury, death or property damage.Should the gas supply fail to shut off or if overheatingoccurs, turn off the manual gas valve to the furnaceBEFORE turning off the electrical supply and installlockout tag.This furnace contains SAFETY DEVICES which must beMANUALLY RESET. If the furnace is left unattended for anextended period of time, have it checked periodically forproper operation. This precaution will prevent problemsassociated with no heat, such as frozen water pipes, etc. See“Before You Request a Service Call” section in this manual.A92319SCAUTION!UNIT OPERATION HAZARDFailure to follow this caution may result in intermittent unitoperation.Read and follow the operating instructions on theinside of main furnace door (see Figure 7) , especiallythe item that reads as follows:“Wait 5 minutes to clear out any gas. Then smell forgas, including near the floor. If you smell gas, STOP!Follow “B” in the safety information on this furnacelabel. If you don’t smell gas, go to the next step.”Operating Instructions InsideDoorFigure 7FOR YOUR SAFETY READ BEFORE OPERATINGFor proper and safe operation the furnace needs air forcombustion and ventilation. Do not block or obstruct airopenings on the furnace, air opening to the area in whichthe furnace is installed, and the space around the furnace.BEFORE STARTING YOUR FURNACEExamine the furnace installation to determine that:1. All flue gas carrying areas external to the furnace areclear and free of obstructions.2. The vent connector is in place, slopes upward and isphysically sound without holes or gaps.3. The return air duct connection(s) is physically sound, issealed to the furnace casing, and terminates outside thespace containing the furnace.4. The physical support of the furnace is sound withoutsagging cracks, gaps, etc. around the base.5. There are no obvious signs of deterioration of thefurnace.6. The burner flames are in good adjustment, see Figure 5(by comparison with pictorial sketches or drawings of themain burner flame).Figure 5Burner Flame AdjustmentBurner FlameOPERATINGINSTRUCTIONSL11F048SSIf a suspected malfunction occurs with your gas controlsystem, such as the burners do not light when theyshould, refer to the shut down procedures on inside ofmain furnace door, or in the “Shutting Down YourFurnace” section and call your dealer as soon aspossible.CHECK AIR FILTER: Before attempting to start yourfurnace, be sure the furnace filter is clean and in place.See “Performing Routine Maintenance” section in thismanual. Do not run the furnace without a filter in place.Then proceed as follows:STEPS FOR STARTING YOUR FURNACEBurner1. Set your room thermostat mode to off and adjust the setpoint to the lowest temperature setting.Figure 8ManifoldA11461STARTING YOUR FURNACEYour furnace uses an automatic, hot surface ignition systemto light the burners each time the thermostat signals thefurnace to start.Follow these important safeguards:4Specifications subject to change without notice.Lowest Temperature Setting40L11F049440 02 4501 00

2. Close the external manual gas valve.Figure 9Figure 12Close ValveControl Switch to OFFTWO-STAGE GAS CONTROLSINGLE-STAGE GAS CONTROLCLSEOGAS CONTROL SWITCHSHOWN IN “OFF” POSITIONMODULATING GAS RETurn off Electrical SupplyNAT.GASONFigure 10OFF3. Turn OFF electrical supply to the furnace.GAS CONTROL SWITCHSHOWN IN “OFF” POSITIONA112926. Turn the control switch to ON.Figure 13Control Switch to ONTWO-STAGE GAS CONTROLSINGLE-STAGE GAS CONTROLA921854. Remove the outer door by turning knobs, then pull doorforward.Figure 11GAS CONTROL SWITCHSHOWN IN “ON” POSITIONRemove Furnace Door (upflow shown)MODULATING GAS PRESSUREGAS CONTROL SWITCHSHOWN IN “ON” POSITIONA112917. Replace the outer door by placing flange inside casing,push door firmly against casing and turn knobs to tighten.Figure 14Furnace Door ReplacedA113025. Turn the control switch on the gas control to the OFFposition and wait 5 minutes. See Figure 12. Then smellfor gas, including near the floor. If you smell gas, STOP!Follow “B” on furnace label and follow the safetyinformation on the cover of this manual. If you don’t smellgas, go to next step.A11301440 02 4501 00Specifications subject to change without notice.5

8. Turn ON the electrical supply to the furnace.Figure 15keeps the temperature level in your home more evenlybalanced. It also continuously filters the indoor air.Turn On Electrical SupplySHUTTING DOWN YOUR FURNACEA923599. Open the external manual gas valve.Figure 16Open ValveShould you ever suspect a malfunction in your furnace, youwill need to turn the furnace off. The following proceduresmust be followed:1. Set your room thermostat mode to the lowesttemperature setting and set to OFF. (See Figure 8)2. Close the external manual gas valve (See Figure 9).3. Turn off electrical supply to the furnace. (See Figure 10)4. Remove outer furnace door. (See Figure 11)5. Turn the switch on the gas control to the OFF position.(See Figure 12)6. Replace the outer furnace door. (See Figure 14)7. If the furnace is being shut down because of amalfunction, call your dealer as soon as possible.MINIMUM AND MAXIMUM TEMPERATURESETTING FOR YOUR FURNACEOPENThis furnace is designed for minimum continuous return airtemperature of 60 F (15 C) db or intermittent operation downto 55 F (15 C) db such as when used with a night setbackthermostat. Return air temperature must not exceed 80 F(27 C) db. Failure to follow these return air temperature limitsmay affect reliability of heat exchangers, motors, and controls.PERFORMING ROUTINE MAINTENANCEA0618910. Set the room thermostat mode to “heat” and adjust thesetpoint to a temperature slightly above the roomtemperature. This will automatically signal the furnace tostart. The combustion air draft inducer motor will startand the hot surface igniter will energize. When hot, theigniter will have an orange glow.11. After about seventeen (17) seconds, the gas valvepermits gas to flow to the main burners where it is ignited.Hot flames begin to warm the furnace’s heat exchanger.After a time delay of approximately twenty five to sixty(25 60) seconds the furnace blower is switched on.NOTE: If the main burners fail to ignite, the furnace controlsystem will go through three more ignition cycles. Then ifburners fail to ignite, the system will lockout. If lockout occurs orthe blower does not come on, shut down your furnace and callyour dealer for service.12. Set your thermostat to the temperature that satisfies yourcomfort requirements.SUGGESTION: Setting the thermostat back a fewdegrees—and compensating for the difference with warmerclothing—can make a big difference in your fuel consumptionon extremely cold days. The few degrees at the top of yourthermostat “comfort level” are the most costly degrees toobtain.When the room temperature drops below the temperatureselected on the thermostat, the furnace will switch onautomatically. When the room temperature reaches the settingselected on the thermostat, the furnace will be automaticallyswitched off.Continuous Fan Operation Some thermostats have a“FAN” switch with two (2) selections: AUTO and ON. Whenthermostat is set on AUTO, the furnace blower cycles on andoff, controlled by the thermostat. In ON position, the furnaceblower runs continuously except for a forty two to sixty two(42 62) second delay at the “call for heat.” Continuous fan6With proper maintenance and care, your furnace will operateeconomically and dependably. Instructions for basicmaintenance are found on this and the following pages.However, before beginning maintenance, follow these safetyprecautions:WARNING!ELECTRICAL SHOCK HAZARDFailure to follow this warning could result in personalinjury or death.Turn off electrical power supply to your furnace beforeremoving the access doors to service or performmaintenance.CAUTION!CUT HAZARDFailure to follow this caution may result in personalinjury.Although special care has been taken to minimizesharp edges, be extremely c

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