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From inside (document excerpt):
58MTA Deluxe 4Way Multipoise 2-Stage Direct Vent Condensing Gas Furnace Visit www.carrier.com Installation, Start-up, and Operating Instructions Sizes 060-120 NOTE: Read the entire instruction manual before starting the installation. This symbol indicates a change since the last issue. Condensate Trap Freeze Protection 9 Horizontal Left (Supply-Air Discharge) Applications 9 Condensate Trap Location 9 Condensate Trap Tubing .10 Condensate Trap Field Drain Attachments 10 Pressure Switch Tubing .10 Condensate Trap Freeze Protection 11 Construct a Working Platform 11 Horizontal Right (Supply-Air Discharge) Applications 11 Condensate Trap Location 11 Condensate Trap Tubing .11 Condensate Trap Field Drain Attachment 12 Pressure Switch Tubing .12 Condensate Trap Freeze Protection 12 Construct a Working Platform 12 LOCATION 13 General 13 Furnace Location Relative to Cooling Equipment .13 Hazardous Locations .14 INSTALLATION .14 Leveling Legs (If Desired) .14 Installation in Upflow and Downflow Applications 14 Installation in Horizontal Applications 16 Air Ducts .16 General Requirements .16 Ductwork Acoustical Treatment .16 Supply Air Connections 16 Return Air Connections .16 Filter Arrangement 17 Bottom Closure Panel .18 Gas Piping .18 Electrical Connections 19 115-V Wiring .19 24-V Wiring .21 Accessories 21 Direct Venting .23 Removal of Existing Furnaces from Common Vent Systems 23 Combustion-Air and Vent Piping .24 Concentric Vent and Combustion-Air Termination Kit Installation .28 Multiventing and Vent Terminations 32 Condensate Drain 32 General .33 Application .33 Condensation Drain Protection .34 START-UP ADJUSTMENT AND SAFETY CHECK 34 General 34 Sequence of Operation 35 Two-Stage Heating With Single-Stage Thermostat (Adaptive Mode) 35 A93040 TABLE OF CONTENTS SAFETY CONSIDERATIONS .2 INTRODUCTION 2 CODES AND STANDARDS 3 Safety .3 General Installation .3 Combustion and Ventilation Air 3 Duct Systems 3 Acoustical Lining and Fibrous Glass Duct 3 Gas Piping and Gas Pipe Pressure Testing 3 Electrical Connections 5 ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS 5 APPLICATIONS 6 General 6 Upflow Applications .6 Condensate Trap Location (Factory-Shipped Orientation) 6 Condensate Trap Tubing (Factory-Shipped Orientation) 6 Condensate Trap Location (Alternate Upflow Orientation) 7 Condensate Trap Tubing (Alternate Upflow Orientation) .7 Condensate Trap Field Drain Attachment 8 Pressure Switch Tubing .8 Upper Collector Box and Inducer Housing (Unused) Drain Connections .8 Condensate Trap Freeze Protection 8 Downflow Applications 8 Condensate Trap Location 8 Condensate Trap Tubing .8 Condensate Trap Field Drain Attachment 9 Pressure Switch Tubing .9 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.