Carrier 58MCA 6SI 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 140 ® ama CANADIAN GAS ASSOCIATION A PP R O VED R 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 .8-9 Horizontal Right (Supply-Air Discharge) Applications .10-11 LOCATION 11-13 General .11-12 Furnace Location Relative to Cooling Equipment 12 Hazardous Locations .13 INSTALLATION 13-18 Leveling Legs (If Desired) .13 Installation In Upflow and Downflow Applications .13 Installation In Horizontal Applications .13-14 Air Ducts 15-16 Ductwork Acoustical Treatment .15-16 Supply Air Connections 16 Return Air Connections 16 Filter Arrangement 16 Bottom Closure Panel 16-17 Gas Piping 17-18 ELECTRICAL CONNECTIONS .18-19 115-v Wiring 18-19 24-v Wiring .19 Wiring Diagram 20 Accessories 19 DIRECT VENTING .19-30 Removal of Existing Furnaces from Common Vent Systems 19-20 Combustion-Air and Vent Piping .20-27 Concentric Vent and Combustion-Air Termination Kit Installation 27-30 Multiventing and Vent Termination .30 CONDENSATE DRAIN 30-32 General 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 Application .30-32 Condensate Drain Protection 32 SEQUENCE OF OPERATION 32-34 Heating Mode 32 Cooling Mode 32-33 Continuous Blower Mode .33 Heat Pump Mode 33 Component Test .33-34 START-UP PROCEDURES 34-41 General 34 Prime Condensate Trap With Water 34 Purge Gas Lines 35 Adjustments .35-41 Set Gas Input Rate 35-41 Set Temperature Rise 41 Blower Off Delay (Heat Mode) .41 Set Thermostat Heat Anticipator 41 CHECK SAFETY CONTROLS 42 Check Primary Limit Control .42 Check Pressure Switch .42 CHECKLIST .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. 535-749 Printed in U.S.A.