58DXC, 58SXCDeluxe Gas-Fired Condensing FurnacesHEATING & COOLINGService and Maintenance InstructionsFor Sizes 040-100, Series 100NOTE: Read the entire instruction manual before starting theinstallation.SAFETY CONSIDERATIONSInstalling and servicing heating equipment can be hazardous due togas and electrical components.' Only trained and qualified person¬nel should install, repair, or service heating equipment.Untrained personnel can perform basic maintenance functionssuch as cleaning and replacing air filters. All other operations mustbe performed by trained^rvice personnel. When working onheating equipment, obsen^recautiohs in the literature, tags, andlabels attached to or shipped with the unit and other safetyprecautions that may apply.Follow all safety codes, including NFPA 54/ANSI Z223.1-1988,National Fuel Gas Code. Wear safety glasses and work gloves.Have a fire extinguisher available during start-up and adjustmentprocedures and service calls.Recognize safety information. This is the safety-alert symbol ^ .When you see this symbol on the unit and in instructions ormanuals, be alert to the potential for personal injury.Understand the signal word-DANGER, WARNING, or CAU¬TION.’ These words are used with the safety-alert symbol, DAN¬GER identifies the.most serious hazards which will result in severepersonal injur^ or death. WARNING signifies hazards that couldresult in personal injury or death. CAUTION is used to identifyunsafe practices, which would result in minor personal injury orproduct and property damage.A WARNINGThe ability to properly perform maintenance on this equip¬ment requires certain expertise, mechanical skills, tools, andequipment. If you do not possess these, do not attempt toperform any maintenance on this equipment other than thoseprocedures recommended in the User’s Manual. FAILURETO FOLLOW THIS WARNING COULD RESULT INPOSSIBLE DAMAGE TO THIS EQUIPMENT, SERIOUSPERSONAL INJURY, OR DEATH.A WARNINGNever store anything on, near, or in contact with, the furnace,such as:1. Spray or aerosol cans, rags, brooms, dust mops, vacuumcleaners, or other cleaning tools.2. Soap powders, bleaches, waxes or other cleaning com¬pounds, plastic or plastic containers, gasoline, kerosene,cigarette lighter fluid, dry cleaning fluids, or other volatilefluids.3. Paint thinners and other painting compounds, paper bags orother paper products.Failure to follow this warning can cause corrosion of the heatexchanger, fire, personal injury, or death.Fig. 2—Model 58DXC Downflow FurnaceManufacturer reserves the right to discontinue, or change at any time, specifications or desigtTwtthout^oean^Ilt^^PC 101 Catalog No. 535-832 Printed in U.S.A. Form 58D,S-8SIVIBook 1 4Tab 6a 8a pgi 7-92 Replaces: 58D,S-6SM