Carrier Owners Manual - Enlarge page 1 of 8
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From inside (document excerpt):
Product Data ® 58RAV High-Efficiency Downflow/Horizontal Induced-Combustion Gas Furnace Input Capacities: 50,000 thru 135,000 Btuh 80% AFUE At Budget Price Carrier provides an 80% Annual Fuel Utilization Efficiency (AFUE) gas furnace for the budget conscious consumer and builder. The 58RAV offers the same high quality you demand and receive from Carrier. The cabinet is constructed from a specially selected galvanized steel.
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There is also double protection for the cabinet. First, a galvlanized steel substrate provides resistance to rusting. Then the cabinet is constructed of prepainted steel — the same highquality finish found on refrigerators and dishwashers. The 58RAV offers a hot surface ignition system which provides a superior and more reliable ignition than older spark relight systems. The heat exchangers are constructed of aluminized steel and covered by a 20-year Limited Warranty. They are Carrier’s patented Super-S heat exchangers that improve heat transfer and enable downsizing of this furnace to only 40-in. tall. To improve the sound level, we have incorporated a soft mount inducer assembly and a slow opening gas valve. The control board is the brain of this induced-combustion gas furnace. It offers a unique self-test feature that checks all the major functions of the furnace within 1 minute. The control board also features a 3-amp fuse that protects the transformer and control board. Another feature on the control board is an LED status indicator light to ensure top furnace performance. Form No. 58RAV-5PD DOWNFLOW HORIZONTAL 1995 Carrier Corporation SERVICE G 1 SW1 BLOWER OFF DELAY 32615 Y W BLOWER-OFF DELAY SWITCH SETTING P5 UNITED TECHNOLOGIES ELECTRONIC CONTROLS HUNTINGTON, IN 46750 FURNACE CONTROL 1012-940 MODEL HK42FZ011 FOR USE WITH ALL GASES CAN/CSA – C22.2 NO. 199-M89 320791-102 REV.