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User's Information Manual
Residential Gas Furnaces
FOR YOUR SAFETY
!
WARNING:
FIRE OR EXPLOSION HAZARD
Failure to follow safety precautions exactly could
result in serious injury, death or property damage.
— 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:
Do not try to light any appliance.
Do not touch any electrical switch;
do not use any phone in your
building.
Immediately call your gas sup
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80+ AFUE 8 1 Ignitor 2 Flame Sensor 14 (Not Shown) 13 3 Gas Valve 6 4 Flame Roll-out 3 Switch(s) 5 Pressure Switch 1 5 6 Control Board 7 Blower Door 9 10 Switch(s) 8 Exhaust Adapter 7 9 Low Voltage 11 Transformer 10 Burner Assembly 4 11 Supply Air Limit Switch 12 Blower Assembly 13 Induced Draft Blower 12 14 Vent Transition Upflow/Horizontal Furnace 80+ AFUE 15 8 13 11 9 1 4 9 2 7 12 3 16 5 10 14 6 14 6 10 7 5 12 2 3 4 13 1 11 Upflow/Horizontal Furnace Downflow Furnace 1 Ignitor 8 Vent Assembly
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90+ AFUE 19 18 10 18 12 19 4 7 16 1 8 6 2 15 3 11 5 5 15 7 10 13 17 17 13 9 9 14 11 2 8 12 3 1 14 16 4 Upflow/Horizontal Condensing Furnaces Downflow Condensing Furnace 1 Ignitor (Not Shown) 8 Blower Door Switch 14 Condensate Drain 2 Flame Sensor (Not 9 Vent Safety Switch Tube Shown) 10 Low Voltage 15 In-Line Drain 3 Gas Valve Transformer Assembly 4 Flame Roll-out 11 Supply AIr Limit 16 Burner View Port Switch Switch(s) 17 Front Header Box 5 Pressure Switch 12 Circulating Air 18 Combustion Air 6
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90+ AFUE Two - Stage Models 20 19 20 11 5 7 17 8 7 12 9 16 3 4 6 6 16 8 14 11 18 14 18 10 9 10 4 12 3 13 5 17 15 15 Upflow/Horizontal Furnace Models Downflow Furnace Models 1 Ignitor (Not Shown) 10 Vent Safety Switch 16 In-Line Drain 2 Flame Sensor (Not 11 Low Voltage Assembly Shown) Transformer 17 Burner View Port 3 Primary Gas Valve 12 Supply Air Limit Switch 18 Front Header Box 4 Secondary Gas Valve 13 Circulating Air Blower 19 Combustion Air 5 Flame Roll-out Switch(s) Assembly (Not Shown Int
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80+ AFUE Two - Stage Models 10 1 2 4 5 3 11 8 6 9 13 7 12 Upflow/Horizontal Furnace 1 Ignitor 7 Blower Door 11 Supply Air Limit 2 Flame Sensor Switch Switch 3 Gas Valve 8 Vent Assembly 12 Blower Assembly 4 Flame Roll-out 9 Low Voltage 13 Induced Draft Switch(s) Transformer Blower 5 Pressure Switch 10 Burner Assembly 6 Control Board Figure 4. Furnace Parts Identified 6
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under water. A flood-damaged furnace is GENERAL INFORMATION extremely dangerous. Attemps to use the furnace can result in fire or explosion. A qualified service This furnace has been designed and built to agency should be contacted to inspect the provide many years of safe and dependable furnace and to replace all gas controls, control home comfort, providing it is properly installed system parts, electrical parts that have been and maintained. With regular maintenance, this wet or the furnace i
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To maximize heat exchanger life, the combustion be connected to any other heat producing device air must be free of chemicals which form corrosive such as a fireplace insert, stove, etc. Doing so may result in fire, explosion, personal injury, acidic compounds in the combustion gases. Some examples of these chemicals are chlorine, carbon monoxide poisoning, or property damage. fluorine, and sulphur. Some common sources of these chemicals are detergents, bleaches, Use a type high velocity air fi
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air blower motors used in these furnaces are 5. Maintenance pre-lubricated and sealed at the factory. No Proper maintenance is most important to achieve further oiling of the bearings is required for the the best performance from this furnace and life of the motor. should be performed by a qualified service technician. Follow the maintenance schedule Blower Compartment — The blower (see Table 1) and the following instructions for compartment should be cleaned monthly during years of safe, trou
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6. Operating Instructions ! READ THE SAFETY INFORMATION ON WARNING: THE FOLLOWING PAGE BEFORE Do not operate your furnace if you OPERATING. find any of the following conditions. Such conditions may allow toxic ! WARNING: fumes to escape into your home: Obstructions or restrictions in Should overheating occur, or the gas the vent pipe and/or chimney. supply fail to shut off, shut off the Holes or cracks in the vent pipe. manual gas valve to the furnace Visible corrosion in the vent pipe.
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If the combustion and circulating air blowers are IMPORTANT: If the furnace operates after operating, and items 1 through 6 have been depressing the reset button on the vent limit checked without identifying the cause of the or roll out limit, it is an indication of a problem, press the red reset buttons on the vent potentially serious problem in the installation. safety and the roll out limit switches. (See Contact a qualified serviceman to identify Figures 1, 2, 3 and 4). and repair the prob
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7082220 (Replaces 7081670) ¢708222y¤ Specifications and illustrations subject to change without notice and without incurring obligations. Printed in U.S.A. (01/03) 7082220
