Carrier 58MCA 1SI Gas Furnace Owners Manual

58MCA 4-Way Multipoise Fixed-Capacity Condensing Gas Furnace Installation, Start-Up, and Operating Instructions For Sizes 040–120 Series 121 ® ama CANADIAN GAS ASSOCIATION A PP R O VED R As an ENERGY STAR Partner, Carrier Corporation has determined that this product meets the ENERGY STAR guidelines for energy efficiency. A93040 AIRFLOW NOTE: Read the entire instruction manual before starting the installation.

This symbol indicates a change since the last issue. Index Page UPFLOW 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 4-6 Downflow Applications .7-8 Horizontal Left (Supply-Air Discharge) Applications .8-9 Horizontal Right (Supply-Air Discharge) Applications .9-11 LOCATION 11-12 General .11-12 Furnace Location Relative to Cooling Equipment 12 Hazardous Locations .12 INSTALLATION 12-16 Leveling Legs (If Desired) 12-13 Installation On a Concrete Slab .13 Installation On a Combustible Floor (Downflow Applications) 13-14 Installation In Horizontal Applications 14 Filter Arrangement 15 Bottom Closure Panel .15 Gas Piping 15-16 ELECTRICAL CONNECTIONS .16-19 115-v Wiring 16-17 24-v Wiring 17-19 Accessories 19 DIRECT VENTING .20-27 Removal of Existing Furnaces from Common Vent Systems .20 Combustion-Air and Vent Piping .20-25 Concentric Vent and Combustion-Air Termination Kit Installation 25-27 Multiventing and Vent Termination .27 HORIZONTAL LEFT DOWNFLOW AIRFLOW HORIZONTAL RIGHT AIRFLOW AIRFLOW Fig. 1–Multipoise Orientations A93041 CONDENSATE DRAIN 27-29 General 27 Application .27-29 Condensate Drain Protection 29 SEQUENCE OF OPERATION 29-31 Heating Mode 29-30 Cooling Mode .30 Continuous Blower Mode .30 Heat Pump Mode 30 Component Test .30-31 START-UP PROCEDURES 31-35 General 31 Prime Condensate Trap With Water 31 Purge Gas Lines 32 Adjustments .32-35 Set Gas Input Rate 32-34 Set Temperature Rise 34 Blower Off Delay (Heat Mode) .35 Set Thermostat Heat Anticipator 35 CHECK SAFETY CONTROLS 35 Check Primary Limit Control .35 Check Pressure Switch .35 CHECKLIST .35-36 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. 565-907 Printed in U.S.A. Form 58MCA-1SI Pg 1 7-95 Replaces: 58MXA-3SI Tab 6a 8a