Carrier 58MSA 7SI Gas Furnace Owners Manual

58MSA 4-Way Multipoise Fixed-Capacity Condensing Gas Furnace Visit www.carrier.com Installation, Start-Up, and Operating Instructions For Sizes 040–120 Series 140 NOTE: Read the entire instruction manual before starting the installation. This symbol indicates a change since last issue. ama CERTIFIED A93040 Index Page DIMENSIONAL DRAWING 3 SAFETY CONSIDERATIONS .2 Clearances to Combustibles 4 CODES AND STANDARDS 2-5 ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS 5 INTRODUCTION 5 APPLICATIONS 6-12 General 6 Upflow Applications 6-7 Downflow Applications .7-9 Horizontal Left (Supply-Air Discharge) Applications .9-10 Horizontal Right (Supply-Air Discharge) Applications .10-12 LOCATION 12-14 General 12 Furnace Location Relative to Cooling Equipment .13-14 Hazardous Locations .14 AIR FOR COMBUSTION AND VENTILATION .14-15 General 14 Unconfined Space .14 Confined Space .15 INSTALLATION 15-17 Leveling Legs (If Desired) .15 Installation in Upflow and Downflow Applications 15-16 Installation In Horizontal Applications .15-17 AIR DUCTS 17-21 General 17 Ductwork Acoustical Treatment .17 Supply Air Connections 17 Return Air Connections 17 Filter Arrangement 19 Bottom Closure Panel .19 Gas Piping 19-21 ELECTRICAL CONNECTIONS .21-25 115-v Wiring 21-22 24-v Wiring .24 Accessories 24-25 VENTING .25-30 Removal of Existing Furnaces from Common Vent Systems .25 Combustion-Air and Vent Piping .25-29 Vent Termination .29-30 Multiventing 30 As an ENERGY STAR® Partner, Carrier Corporation has determined that this product meets the ENERGY STAR® guidelines for energy efficiency.

REGISTERED QUALITY SYSTEM AIRFLOW UPFLOW HORIZONTAL LEFT DOWNFLOW AIRFLOW HORIZONTAL RIGHT AIRFLOW AIRFLOW Fig. 1–Multipoise Orientations A93041 CONDENSATE DRAIN 30-32 General 30 Application 32 Condensate Drain Protection 32 SEQUENCE OF OPERATION 33-36 Heating Mode 33-34 Cooling Mode .34 Continuous Blower Mode .35 Heat Pump Mode 35 Component Test .35-36 START-UP PROCEDURES 36-42 General 36 Prime Condensate Trap With Water 36 Purge Gas Lines 36 Adjustments .36-42 Set Gas Input Rate 36-41 Set Temperature Rise 42 Blower Off Delay (Heat Mode) .42 Set Thermostat Heat Anticipator 42 CHECK SAFETY CONTROLS 42-43 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. 535-80113 Printed in U.S.A. Form 58MSA-7SI Pg 1 10-03 Replaces: 58MSA-6SI Tab 6a 8a Check Primary Limit Control .42 Check Pressure Switch .43 CHECKLIST 43 SAFETY CONSIDERATIONS utility rooms, crawlspaces, and garages. The furnace is factoryshipped for use with natural gas. A CSA listed gas conversion kit is required to convert furnace for use with propane gas. See Fig. 3 for required clearances to combustibles. Maintain a 1-in. clearance from combustible materials to supply air ductwork for a distance of 36 inches horizontally from the furnace. See NFPA 90B or local code for further requirements. These furnaces SHALL NOT be installed directly on carpeting, tile, or any other combustible material other than wood flooring. In downflow installations, factory accessory floor base MUST be used when installed on combustible materials and wood flooring. Special base is not required when this furnace is installed on manufacturer’s Coil Assembly Part No. CD5 or CK5, or when Coil Box Part No. KCAKC is used. The design of this furnace line is NOT CSA design-certified for installation in recreation vehicles or outdoors.