Carrier 58MCA 5SI 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 13-17 Leveling Legs (If Desired) .13 Installation In Upflow and Downflow Applications 13-15 Installation In Horizontal Applications 15 Filter Arrangement 16 Bottom Closure Panel .16 Gas Piping .17 ELECTRICAL CONNECTIONS .17-20 115-v Wiring 17-18 24-v Wiring 18-20 Wiring Diagram 19 Accessories 20 DIRECT VENTING .21-29 Removal of Existing Furnaces from Common Vent Systems .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 29-31 General 29 Application .29-31 Condensate Drain Protection 31 As an ENERGY STARSM 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 SEQUENCE OF OPERATION 31-33 Heating Mode 31-32 Cooling Mode .32 Continuous Blower Mode .32 Heat Pump Mode 32 Component Test .32-33 START-UP PROCEDURES 33-41 General 33 Prime Condensate Trap With Water 33 Purge Gas Lines 33 Adjustments .33-41 Set Gas Input Rate 33-41 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. 535-823 Printed in U.S.A. Form 58MCA-5SI Pg 1 6-98 Replaces