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From inside (document excerpt):
58MXA 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 .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 .27-29 Application 29 Condensate Drain Protection 29 SEQUENCE OF OPERATION 30-31 Heating Mode 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 31 Adjustments .31-35 Set Gas Input Rate 31-34 Set Temperature Rise 34-35 Adjust Blower Off Delay (Heat Mode) .35 Set