GENERAL INFORMATION
This furnace has been designed and built to provide many years of safe and dependable home comfort, providing it is properly installed and maintained. With regular maintenance, this furnace will operate satisfactorily year after year. Abuse, improper use, and/or improper mainte- nance can shorten the life of the furnace and create hazards for you. Please read this manual carefully to familiarize yourself with operation, maintenance, and safety procedures for this furnace.
A regular service and maintenance schedule should be established to insure efficient and safe operation of the furnace. See Section 5 for maintenance procedures and schedules.
Devices attached to the flue or vent for the purpose of reducing heat loss up the chim- ney have not been tested and have not been included in the design certification of this furnace. We, the manufacturer, can not and will not be responsible for injury
1. Safety Information
The furnace area and the vicinity of any other gas appliance must be kept clear and free of combustible materials, gasoline, and other flammable vapors and liquids. Do not store or use flammable items such as paint, varnish, or strippers in the vicinity of the furnace.
Do not use the furnace closet or area next to the furnace as a storage area. This area must be kept clear, clean, and free of lint. The furnace must also be kept clear of loose or exposed insulation materials. Examine the furnace area when the furnace is installed or when insulation is added. Some insulation materials may be combustible.
For proper and safe operation, the furnace needs air for combustion and ventilation. Do not block or obstruct air openings on the furnace, or any air openings where the furnace may be installed, including any surrounding spaces.
Should the gas supply fail to shut off or if overheating occurs, shut off gas valve to the furnace before shutting off electrical supply.
Do not use this furnace if any part has been
under water. A
Familiarize yourself with the controls that shut off the gas and electrical power to the furnace. If the furnace is to be shut down for an extended period of time, turn off both the gas and electrical power. For your safety always turn off both the gas and electrical power before performing service or maintenance on the furnace.
2. Combustion Air Supply
A furnace needs an adequate supply of combustion and ventilation air for proper and safe operation. Follow the installation instructions included with the furnace to properly vent air to the combustion air inlet and exhaust the products of combustion to the outside from the exhaust vent.
For 90+ and 93+ Models: If the furnace is operated with a restricted combustion air supply, the pressure switch will open, turning off the gas supply to the burners. (See Figures 2 and 3). DO NOT install a jumper wire across this switch to defeat its function. If this switch must be replaced, use only the replacement part specified in the Replacement Parts List.
For 80+ Models: If the furnace is operated with inadequate combustion air supply, the flame roll- out control switch located above the burners may open, turning off the gas supply to the burners. The flame
Air openings in warm air registers, and return air grilles must not be restricted.
!CAUTION:
Combustion air must not be drawn from a corrosive atmosphere.
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