904 N9MP1 & N9MP2SingleStage *9MPDSAFETY REQUIREMENTSARecognize safety information. This is the safety-alert symbol/ ._\. When you see this symbol on the furnace and in instructions or manuals be alertto the potential for personal injury.Understand the signal words DANGER, WARNING, or CAUTION. These words are used with the safety-alert symbol. DANGER identifies themost serious hazards, those that will result in severe personal injury or death. WARNING signifies a hazard that could result in personal injury ordeath. CAuT__N is used t_ identify unsafe _ractices that c_u_d resu_t in min_r _ers_na_ injury _r _r_duct and _r__erty damage.Installing and servicing heating equipment can be hazardous due to gas and electrical components. Only trained and qualified personnel shouldinstall, repair, or service heating equipment.Untrained service personnel can perform basic maintenance functions such as cleaning and replacing air filters. All other operations must beperformed by trained service personnel. When working on heating equipment, observe precautions in the literature, on tags, and on labels attachedto or shipped with the unit and other safety precautions that may apply.Follow all safety codes. In the United States, follow all safety codes including the current edition National Fuel Gas Code (NFGC) NFPA No.54/ANSIZ223.1. InCanada, refer tothecurrent editionofthe NationalStandard Canada CAN/CGA-B149.1- and.2-M91 NaturalGasand PropaneInstallationCodes (NSCNGPIC). Wearsafetyglassesandworkgloves. Havefireextinguisher availableduringstart-upandadjustment proceduresand service calls.These instructions cover minimum requirements and conform to existing national sta nda rds and safety codes. In some insta rices, these instructionsexceed certain local codes and ordinances, especially those that may not have kept up with changing residential construction practices. We requrethese instructions as a minimum for a safe installation.FAN ASSISTED, DIRECT VENT GAS FURNACEManufactured by:International Comfort Products Corporation (USA)Lewisburg, TN 37097Table of Contents1. SafeInstallationRequirements................. 42. Installation................................ 53. Combustion& VentilationAir .................. 84.Vent& CombustionAirPiping ................ 115. GasSupply and Piping ...................... 306. ElectricalWiring ........................... 337. Ductworkand Filter ........................ 348. Checksand Adjustments.................... 389. FurnaceMaintenance ....................... 3910.Sequenceof Operation& Diagnostics.......... 4011.ConcentricVentTermination................. 4412.TechSupport and Parts ..................... 49FIRE OR EXPLOSION HAZARDThis furnace is not designed for use in mobilehomes, trailers or recreational vehicles.Such use could result in death, bodily injuryand/or property damage.PrintedinU.S.A. LPI 12/03/2002 440 01 1114 (00)