035-17737-003 Rev. A (0504)2 Unitary Products Group7. NEVER . . .Store flammable materials of any kind near your fur-nace. Gasoline, solvents, and other volatile liquids should bestored only in approved containers outside your home. Thesematerials vaporize easily and are extremely dangerous.8. NEVER . . .Store cleaning materials near your furnace. Materialssuch as bleaches, detergents, powdered cleansers, etc., cancause corrosion of the heat exchangers.9. NEVER . . . Use the area around your furnace as a storage areafor items which could block the normal flow of air. This flow of air isrequired for ventilation of the various furnace components.INSTRUCTIONS FOR EXAMINING THE FURNACEINSTALLATIONIt is the owner’s responsibility to ensure that an annual inspection of theentire heating portion of the unit is made by a qualified service agency.1. Examine the heat exchanger, vent/combustion air piping, ventconnectors and chimney to be sure they are clear and free ofobstructions.2. Examine the vent pipe making sure it is firmly in place, that itslopes slightly upward and is physically sound without holes andall of the connections are secure.3. Examine the return-air duct connections to make sure they arephysically sound, sealed to the furnace casing, and the ducts ter-minate outside the space containing the furnace.4. Examine the furnace casing making sure the physical support issound without sagging, cracks or gaps. Examine the furnace basemaking sure it is physically sound without cracks, gaps or saggingand has a good seal.5. Examine the furnace casing for obvious signs of deterioration.6. Examine the burner flames to make sure they are in good adjust-ment. Refer to the pictorial sketch shown in Figure 2 as a compari-son to the actual flame.7. Examine the furnace as outlined above in steps “1 - 6” beforeeach heating season. Use Figure 3 for visual reference.FIGURE 1: Component LocationsFIRE OR EXPLOSION HAZARDThis furnace is designed and approved for use with Nat-ural Gas and (LP) Propane Gas ONLY. DO NOT BURNANY LIQUID FUEL OR SOLID FUEL IN THIS FURNACE.Burning any unapproved fuel will result in damage to thefurnace heat exchanger, which could result in Fire, Per-sonal Injury, and/or Property Damage.BURNERBOXLIMITSWITCHPRESSURESWITCHDOORSWITCHBLOWERGAS VALVEVENT PIPEINDUCERBLOWERCONDENSATETRAPCONTROLBOARDFIGURE 2: Burner Flame DrawingCOMBUSTION AIRINTAKEBURNERFLAMEMANIFOLDINNER FLAMECONESMAINBURNERFIGURE 3: Furnace Examination Checkpoints34 EXAMINEFURNACECASING3436EXAMINERETURN AIRDUCTCONNECTIONEXTERNAL HEAT EXCHANGER INTERNALVENT COMBUSTION AIR PIPE. MUSTREMOVE PANEL TO EXAMINE.EXAMINERETURN AIRDUCTCONNECTION(side or bottom)REMOVEPANELTO EXAMINEBURNERFLAMESEXAMINEFURNACECASING5 EXAMINE ENTIREFURNACE CASINGSHOWN IN ALLDRAWINGSEXAMINE EXTERNALVENT PIPE12BURNER DOORBLOWER DOOR