Carrier 58MCA 8SI Gas Furnace Owners Manual

58MCA 4-Way Multipoise Fixed-Capacity Direct-Vent Condensing Gas Furnace Visit www.carrier.com Installation, Start-Up, and Operating Instructions For Sizes 040-140, Series 150 and 160 AIRFLOW UPFLOW A93040 NOTE: Read the entire instruction manual before starting the installation. This symbol indicates a change since the last issue. Index Page DIMENSIONAL DRAWING 2 SAFETY CONSIDERATIONS .3 Clearances to Combustibles 3 ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS 3-4 INTRODUCTION 4 APPLICATIONS 4-11 General 4 Upflow Applications 4-7 Downflow Applications .7-8 Horizontal Left (Supply-Air Discharge) Applications .8-10 Horizontal Right (Supply-Air Discharge) Applications .10-11 LOCATION 12-13 General 12 Furnace Location Relative to Cooling Equipment 13 Hazardous Locations .13 INSTALLATION 13-15 Leveling Legs (If Desired) .13 Installation In Upflow and Downflow Applications .13 AIR DUCTS 15-18 General .15-16 Ductwork Acoustical 16 Supply Air Connections 16 Installation In Horizontal Applications 15 Filter Arrangement 16 Bottom Closure Panel .16 Gas Piping 17-18 ELECTRICAL CONNECTIONS .18-19 115-v Wiring 18-19 24-v Wiring .19 Accessories 19 DIRECT VENTING .19-28 Removal of Existing Furnaces from Common Vent Systems 19-21 Combustion-Air and Vent Piping .21-27 Concentric Vent and Combustion-Air Termination Kit Installation 27-29 Multiventing and Vent Termination .29 CONDENSATE DRAIN 28-32 HORIZONTAL LEFT DOWNFLOW AIRFLOW HORIZONTAL RIGHT AIRFLOW AIRFLOW Fig.

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1–Multipoise Orientations A93041 ama CERTIFIED As an ENERGY STAR® Partner, Carrier Corporation has determined that this product meets the ENERGY STAR® guidelines for energy efficiency. REGISTERED QUALITY SYSTEM General .28-30 Application 30 Condensate Drain Protection 32 SEQUENCE OF OPERATION 32-34 Heating Mode 32 Cooling Mode3 32-33 Continuous Blower Mode .33 Heat Pump Mode 33 Component Test .33-34 START-UP PROCEDURES 34-42 General 34 Prime Condensate Trap With Water 34 Purge Gas Lines 34 Adjustments .35-43 Set Gas Input Rate 35-42 Set Temperature Rise 42 Blower Off Delay (Heat Mode) .42 Set Thermostat Heat Anticipator 42 CHECK SAFETY CONTROLS 43 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 4 PC 101 Catalog No. 535-765 Printed in U.S.A. Form 58MCA-8SI Pg 1 10-00 Replaces: 58MCA-6SI Tab 6a 8a Check Primary Limit Control .43 Check Pressure Switch .43 CHECKLIST 43 SAFETY CONSIDERATIONS Installing and servicing heating equipment can be hazardous due to gas and electrical components. Only trained and qualified personnel should install, repair, or service heating equipment. Untrained personnel can perform basic maintenance functions such as cleaning and replacing air filters. All other operations must be performed by trained service personnel. When working on heating equipment, observe precautions in literature, on tags, and on labels attached to or shipped with unit and other safety precautions that may apply. Follow all safety codes. In the United States, follow all safety codes including the National Fuel Gas Code (NFGC) NFPA No. 54-1999/ANSI Z223.1-1999 and the Installation Standards, Warm Air Heating and Air Conditioning Systems (NFPA 90B) .

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