From inside (document excerpt):
58DL Single Stage Deluxe Induced Combustion 4 Way Multipoise Furnace Installation, Start up, Operating and Service and Maintenance Instructions Series 120/C SAFETY CONSIDERATIONS 2 INTRODUCTION 3 CODES AND STANDARDS 4 Safety 4 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 PRECAUTIONS PROCEDURE .
5 LOCATION . 6 INSTALLATION 11 Upflow Installation 11 Downflow Installation . 11 Horizontal Installation . 13 Filter Arrangement 14 Air Ducts . 14 Gas Piping 17 115- Wiring 23 -V START-UP, ADJUSTMENT, AND SAFETY CHECK . 37 General . 37 Start- Procedures . 37 -up Adjustments . 37 Check Safety Controls . 40 Checklist 41 SERVICE AND MAINTENANCE PROCEDURES . 44 Introduction . 44 Care and Maintenance . 47 NOTE: Read the entire instruction manual before starting the installation. Portions of the text and tables are reprinted from NFPA 54/ANSI Z223.1-2006E, 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. REGISTERED Sequence of Operation . 50 Wiring Diagrams . 52 Troubleshooting 52 ama ISO 9001:2000 CERTIFIED 26-1/8 ” (FLUE COLLAR) the bottom only will ensure adequate return air openings for airflow requirements above 1800 CFM. Fig. 1 – Dimensional Drawing – SAFETY CONSIDERATIONS ! WARNING FIRE, EXPLOSION, ELECTRICAL SHOCK, AND CARBON MONOXIDE POISONING HAZARD Failure to follow this warning could result in dangerous operation, serious injury, death, or property damage. Improper installation, adjustment, alteration, service, maintenance, or use could cause carbon monoxide poisoning, explosion, fire, electrical shock, or other conditions which may cause personal injury or property damage. Consult a qualified service agency, local gas supplier, or your distributor or branch for information or assistance. The qualified service agency must use only factory-authorized and listed kits or accessories when modifying this product. such as cleaning and replacing air filters. All other operations must be performed by trained service personnel. When working on heating equipment, observe precautions in literature, on tags, and on labels attached to or shipped with furnace and other safety precautions that may apply.