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From inside (document excerpt):
58MTB Deluxe 4Way Multipoise 2-Stage Condensing Gas Furnace Visit www.carrier.com Installation, Start-up, and Operating Instructions Sizes 060-120, Series 100 NOTE: Read the entire instruction manual before starting the installation. NOTE: This furnace can be installed as a direct vent (2-pipe) or non-direct vent (1-pipe) condensing gas furnace. This symbol indicates a change since the last issue.
Supply Air Connections 21 Return Air Connections .21 Filter Arrangement 21 Bottom Closure Panel .23 Gas Piping .24 Electrical Connections 25 115-V Wiring .25 24-V Wiring .27 Accessories 27 Removal of Existing Furnaces from Common Vent Systems 28 Combustion-Air and Vent Pipe Systems .28 Condensate Drain 42 General .42 Application .42 Condensation Drain Protection .43 START-UP ADJUSTMENT AND SAFETY CHECK 43 General 43 Prime Condensate Trap With Water 44 Purge Gas Lines 44 Sequence of Operation 44 Two-Stage Heating With Single-Stage Thermostat (Adaptive Mode) 45 Two-Stage Heating With Two-Stage Thermostat (Non-Adaptive Heating Mode) .45 Cooling Mode 46 Thermidistat Mode 46 Continuous Blower Mode .50 Heat Pump .50 Component Self-Test .50 Operate Furnace .51 Furnace Restart 51 Adjustments .51 Set Gas Input Rate 51 Set Temperature Rise 56 Adjust Blower Off Delay (Heat Mode) 57 Set Thermostat Heat Anticipator 57 Check Safety Controls 57 Checklist 58 A93040 TABLE OF CONTENTS SAFETY CONSIDERATIONS .2 CODES AND STANDARDS 3 Safety .3 General Installation .3 Combustion and Ventilation Air 5 Duct Systems 5 Acoustical Lining and Fibrous Glass Duct 5 Gas Piping and Gas Pipe Pressure Testing 5 Electrical Connections 5 ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS 6 INTRODUCTION 6 APPLICATIONS 6 General 6 Upflow Applications .6 Downflow Applications 8 Horizontal Left (Supply-Air Discharge) Applications 10 Horizontal Right (Supply-Air Discharge) Applications 11 LOCATION 14 General 14 Furnace Location Relative to Cooling Equipment .15 Hazardous Locations .15 Furnace Location and Application .15 AIR FOR COMBUSTION AND VENTILATION 16 INSTALLATION .19 Leveling Legs (If Desired) .19 Installation in Upflow and Downflow Applications 19 Installation in Horizontal Applications 19 Air Ducts .19 General Requirements .19 Ductwork Acoustical Treatment .21 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 Printed in U.S.A. Catalog No. 58MTB-1SI Pg 1 8-05 Replaces: 58MTA-8SI Tab 6a 8a AIRFLOW UPFLOW HORIZONTAL LEFT DOWNFLOW AIRFLOW HORIZONTAL RIGHT AIRFLOW SAFETY CONSIDERATIONS AIRFLOW A93041 FURNACE RELIABILITY HAZARD Improper installation or misapplication of furnace may require excessive servicing or cause premature component failure.