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From inside (document excerpt):
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 170 ama A93040 CERTIFIED 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 4 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 12-13 General 12 Furnace Location Relative to Cooling Equipment 13 Hazardous Locations .13 INSTALLATION 13-14 Leveling Legs (If Desired) 13-14 Installation In Upflow and Downflow Applications .14 Installation In Horizontal Applications 14 AIR DUCTS 14-19 General 14 Ductwork Acoustical Treatment .16 Supply Air Connections 16-17 Return Air Connections 17 Filter Arrangement 17 Bottom Closure Panel .18 Gas Piping 18-19 ELECTRICAL CONNECTIONS .19-20 115-v Wiring 19-20 24-v Wiring .20 Accessories 20 DIRECT VENTING .20-30 Removal of Existing Furnaces from Common Vent Systems .23 Combustion-Air and Vent Piping .23-29 Concentric Vent and Combustion-Air Termination Kit Installation 29-30 Multiventing and Vent Termination .30 CONDENSATE DRAIN 30-34 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 General .30-32 Application 32 Condensate Drain Protection .32-34 SEQUENCE OF OPERATION 34-36 Heating Mode 34 Cooling Mode 34-35 Continuous Blower Mode .35 Heat Pump Mode 35 Component Test .35-36 START-UP PROCEDURES 36-44 General 36 Prime Condensate Trap With Water 36 Purge Gas Lines 36 Adjustments .36-44 Set Gas Input Rate 36-44 Set Temperature Rise 44 Blower Off Delay (Heat Mode) .44 Set Thermostat Heat Anticipator 44 CHECK SAFETY CONTROLS 44 Check Primary Limit Control .44 Check Pressure Switch .44 CHECKLIST 45 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. 535-80091 Printed in U.S.A. Form 58MCA-10SI Pg 1 12-02 Replaces: 58MCA-9SI Tab 6a 8a 26 15/16 ” 26 15/16 ” AIRFLOW 26 1/4 ” 22 5/16 ” 19 ” OUTLET 2-IN. COMBUSTIONAIR CONN DIA GAS CONN