Carrier Owners Manual - Enlarge page 1 of 8
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From inside (document excerpt):
Product Data ® 58GFA Induced-Combustion Upflow Furnace Heating Inputs: 65,000 thru 150,000 Btuh 78% AFUE With ContinuousPilot Ignition Carrier is the first manufacturer to provide a 78% Annnual Fuel Utilization Efficiency (AFUE) gas furnace for the budget conscious consumer and builder. The 58GFA offers the same high quality you demand from Carrier. The superior attention to cabinet detail is obvious.
The Carrier 58GFA features 1-piece, seamless, wrap-around construction. There are no spot welds on the exterior surfaces of the furnace. There is also double protection for the cabinet. First, a galvanized steel substrate provides resistance to rusting; then the cabinet is constructed of prepainted steel — the same highquality finish found on refrigerators and dishwashers. The 58GFA offers a proven continuous-pilot ignition system which provides superior reliability. Carrier’s patented Super-S heat exchanger improves heat transfer and enables downsizing of this furnace to only 40-in. tall. It is covered by a 10-year heat exchanger Limited Warranty. The solid-state control board is the brain of this induced-combustion gas furnace. The control board features a 3-amp fuse which protects the 24-v control transformer. 1996 Carrier Corporation Form 58GFA-3PD 1 COM EAC-2 PR-2 CFR LO 3 EAC-1 HI L2 HFR L1 PR-1 1 2 3 4 5 6 7 8 9 PL-1 SPARE-1 IDR SPARE-2 SEC-2 SEC-1 W Y1 R C G FU 3-AMP FUSE GROUND SCREW REQUIRED CES0110074-01 24VAC COMMON BLOWER OFF-DELAY A96287 A89217 HEAT EXCHANGER PRINTED-CIRCUIT BOARD A92074 INDUCER BLOWER MEETS DOE RESIDENTIAL CONSERVATION SERVICES PROGRAM STANDARDS. ® ama CANADIAN GAS ASSOCIATION A PP R O VED R Before purchasing this appliance, read important energy cost and efficiency information available from your retailer. Model number nomenclature 58GFA Induced-Combustion Upflow Furnace Series Number Cooling Size (Airflow) (400 CFM per 12,000 Btuh)