5Component IdentificationProduct ApplicationThis furnace is primarily designed for residential home-heatingapplications.IMPORTANT:■ This furnace is not designed or certified for use in mobilehomes, trailers or recreational vehicles.■ This furnace is not designed or certified for outdoorapplications.■ The furnace must be installed indoors (for example, atticspace, crawl space or garage area provided the garage areais enclosed with an operating door).This furnace can be used in the following nonindustrialcommercial applications:NOTE: In such applications, the furnace must be installed withthe following stipulations:■ It must be installed according to the installation instructionsprovided and according to local and national codes.■ It must be installed indoors in a building constructed on site.■ It must be part of a ducted system and not used in a free airdelivery application.■ It must not be used as a “makeup” air unit.■ It must be installed with 2-pipe systems for combustion air,especially if VOC’s or other contaminants are present in theconditioned space.■ All other warranty exclusions and restrictions apply.A. Gas control valveB. Gas line entrance (alternate)C. Pressure switchD. Gas manifoldE. Combustion air intakeconnection/couplingF. Hot surface igniterG. Rollout limit switchH. BurnersI. Flame sensorJ. Flue pipe connection/couplingK. Flue pipeL. Primary limit switchM. Gas line entranceN. Flue pipe connection (alternate)O. Rubber elbowP. Induced draft blowerQ. Electrical connection inlets (alternate)R. Coil front cover pressure tapS. Coil front cover drain portT. Drain line penetrationsU. Drain trapV. Blower door interlock switchW. CapacitorX. 24-volt thermostat connectionsY. Integrated control module (withfuse and diagnostic LED)Z. Transformer (40VA)AA. Circulator blowerAB. Auxiliary limit switchAC. Junction boxAD. Electrical connection inletsAE. Coil front coverAF. Combustion air inlet pipeAI G H G DFLMUTSRAEABXWYAFE Z AA JCO NPRSTBKQVBlower Compartment Burner CompartmentABCDE F G H G I JKCLMNOPRS TWVACXZAAABUTS RAEQADDEHUMCUT FOR*********Blower CompartmentBurner CompartmentCounterflow/HorizontalUpflow/HorizontalYACAD■ Schools■ Office buildings■ Churches■ Retail stores■ Nursing homes■ Hotels/motels■ Common areas■ Office areas