From inside (document excerpt):
58CTA/CTX 2 Stage Deluxe, Induced Combustion 4 Way Multipoise Gas Furnace Installation, Start up, Operating and Service and Maintenance Instructions Series 140/E SAFETY CONSIDERATIONS 2 INTRODUCTION 3 CODES AND STANDARDS 5 Safety . 5 General Installation 5 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 Venting .
5 ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS PROCEDURE . 5 LOCATION . 6 AIR FOR COMBUSTION AND VENTILATION . 7 INSTALLATION 10 UPFLOW INSTALLATION 10 DOWNFLOW INSTALLATION . 11 HORIZONTAL INSTALLATION 11 FILTER ARRANGEMENT . 15 AIR DUCTS . 15 GAS PIPING 17 ELECTRICAL CONNECTIONS 21 VENTING 26 START-UP, ADJUSTMENT, AND SAFETY CHECK . 33 General 33 Start-Up Procedures 34 Adjustments . 34 Check Safety Controls . 39 NOTE: Read the entire instruction manual before starting the installation. Portions of the text and tables are reprinted from NFPA 54/ANSI Z223.1-2009E, with permission of National Fire Protection Association, Quincy, MA 02269 and American Gas Association, Washington DC 20001. This reprinted material is not the complete and official position of the NFPA or ANSI on the referenced subject, which is represented only by the standard in its entirety. Use of the AHRI Certified TM Mark indicates a manufacturer’s participation in the program. For verification of certification for individual products, go to www.ahridirectory.org. C DE S I GN ISO 9001:2000 Checklist . 39 SERVICE AND MAINTENANCE PROCEDURES . 44 Introduction . 44 Care and Maintenance . 45 Sequence of Operation . 49 Wiring Diagrams