From inside (document excerpt):
58STA/STX 4-WAY MULTIPOISE INDUCED-COMBUSTION GAS FURNACE Input Capacities: 45,000 thru 155,000 Btuh Product Data THE CARRIER 58STA/STX GAS FURNACE The 58STA/STX 4-way Multipoise Gas Furnaces feature Carrier’s QuieTecht noise reduction system for incredibly quiet induced draft operation. Applications are easy with 4-way multipoise design, through-the-furnace downflow venting, 13 different venting options, and a door designed for easy service access.
Heating, Ventilating and Air Conditioning User Manual Free Download. HAVC Operator’s Manual. Gas Furnace and AC Free Instruction Manual Download PDF.
An inner blower door is provided for tighter sealing in sensitive applications. The 58STA/STX furnaces are approved for use with natural or propane gas, and the 58STX is approved for use in Low NOx Air Management Districts. STANDARD FEATURES — — QuieTecht noise reduction system Microprocessor based control center LED diagnostics and self test feature Adjustable heating air temperature rise Adjustable cooling airflow 4-way Multipoise furnace, 13 vent applications Compact design – only 33-1/3 in. (847 mm) tall Power Heatt Igniter Draft safeguard switch to ensure proper furnace venting Inner door for tighter sealing HYBRID HEATr Dual Fuel System compatible All models are chimney friendly when used with accessory vent kit Twinning in Upflow, Downflow and Horizontal Residential installations eligible for consumer financing through the Retail Credit Program A04039 58STA/STX A02169 A02015 A02170 HEAT EXCHANGER CONTROL BOARD INDUCER BLOWER MODEL NUMBER NOMENCLATURE 58STA 58STA 4–Way Multipoise 58STX Low NOx version 045 100 08 Nominal Cooling Size (Airflow at .5 e.s.p.) (400 CFM per 12,000 Btuh) 08 800 CFM 12 1200 CFM 14 1400 CFM 16 1600 CFM Input Capacity 045 44,000 Btuh 070 66,000 Btuh 090 88,000 Btuh 110 110,000 Btuh 135 132,000 Btuh 155 154,000 Btuh Series Number 20 2000 CFM 22 2200 CFM 2 FURNACE COMPONENTS INDUCER MOROR ASSEMBLY VENT ELBOW* PRESSURE SWITCHES MAIN LIMIT SWITCH (BEHIND DRAFT SAFEGUARD SWITHCH GAS MANIFOLD GAS VALVE GAS BURNER FLAME SENSOR BLOWER DOOR SAFETY SWITCH MANUAL RESET LIMIT SWITCHES HOT SURFACE IGNITER CONTROL BLOWER AND MOTOR RATING PLATE NOT SHOWN (LOCATED ON BLOWER DOOR) *Elbow may be turned to a different position, depending on type of installation. A04138 NOTE: The 58STA/STX Furnaces are factory shipped for use with natural gas. These furnaces can be field-converted for propane gas with a factory-authorized and listed accessory conversion kit. 3 58STA/STX FLUE COLLECTOR BOX CARRIER ACCESSORIES A97432 CONTROLS: THERMOSTATS AND ZONING Available in programmable and non-programmable models, Carrier thermostats maintain a constant temperature level in the home. For the ultimate in home comfort, Carrier’s 2, 4, and 8-zone systems allow temperature control of individual “zones ” of the home. This is accomplished through a series of electronic dampers and remote room sensors. The 4-zone system is shown. EXTERNAL FILTER RACK (SIDE OR BOTTOM) A02121 A01484 58STA/STX Custom-made filter rack for easy connection when a return plenum already exists. Provides easy access for cleaning filter. MECHANICAL OR ELECTRONIC AIR CLEANER A04008 MODEL HUMCCLFP HUMIDIFIER By adding moisture to winter-dry air, a Carrier humidifier can often improve comfort and keep furniture, rugs, and draperies in better condition. Moisturizing household air also helps to retain normal body heat and provides comfort at lower temperatures. Cleans the air of smoke, dirt, and many pollens commonly found. Saves decorating and cleaning expenses by keeping carpets, furniture, and drapes cleaner. Electronic air cleaner is shown. Accessories ELECTRONIC AIR CLEANER (EAC) MECHANICAL AIR CLEANER HUMIDIFIER HEAT RECOVERY VENTILATOR ENERGY RECOVERY VENTILATOR UV LIGHTS.