Carrier 58MSA 8SI 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 ama CERTIFIED A93040 NOTE: Read the entire instruction manual before starting the installation. This symbol indicates a change since the last issue. Index Page DIMENSIONAL DRAWING 3 SAFETY CONSIDERATIONS .2 Clearances to Combustibles 4 CODES AND STANDARDS 2 ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS 5 INTRODUCTION 5 APPLICATIONS 6 General 6 Upflow Applications .6 Downflow Applications 7 Horizontal Left (Supply-Air Discharge) Applications 9 Horizontal Right (Supply-Air Discharge) Applications 11 LOCATION 12 General 12 Furnace Location Relative to Cooling Equipment 13 Hazardous Locations .13 AIR FOR COMBUSTION AND VENTILATION 13 General 13 Unconfined Space .14 Confined Space .14 INSTALLATION .15 Leveling Legs (If Desired) .15 Installation in Upflow and Downflow Applications 15 Installation In Horizontal Applications 16 Air Ducts .16 General .16 Ductwork Acoustical Treatment .16 Supply Air Connections 16 Return Air Connections .18 Filter Arrangement 18 Bottom Closure Panel 18 Gas Piping 18 Electrical Connections 20 115-v Wiring 21 24-v Wiring 22 Accessories 23 Venting 23 Removal of Existing Furnaces from Common Vent Systems 23 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 Combustion-Air and Vent Piping .23 Vent Termination .32 Multiventing .32 Condensate Drain 33 General .33 Application .33 Condensate Drain Protection .33 START-UP, ADJUSTMENTS AND SAFETY CHECK .34 General 34 Prime Condensate Trap With Water 34 Purge Gas Lines 35 Sequence of Operation 35 Heating Mode 35 Cooling Mode 36 Continuous Blower Mode .36 Heat Pump Mode .36 Component Test .36 Adjustments .36 Set Gas Input Rate 36 Set Temperature Rise 41 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. 535-80118 Printed in U.S.A. Form 58MSA-8SI Pg 1 12-03 Replaces: 58MSA-7SI Tab 6a 8a Blower Off Delay (Heat Mode) 42 Set Thermostat Heat Anticipator 42 Check Safety Controls 42 Check Primary Limit Control .42 Check Pressure Switch 43 CHECKLIST .43 SAFETY CONSIDERATIONS The 58MSA Multipoise Condensing Gas-Fired Furnaces are CSA (formerly AGA and CGA) design-certified for natural and propane gases (see furnace rating plate) and for installation in alcoves, attics, basements, closets, utility rooms, crawlspaces, and garages. The furnace is factory-shipped for use with natural gas. A CSA (formerly AGA and CGA) listed gas conversion kit is required to convert furnace for use with propane gas.