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Describes furnace models, stages, and motor type.
Highlights critical safety warnings for installation and operation.
Warns against flammable vapors and gas leak procedures.
Details safety precautions for servicing electrical components.
Stresses proper venting to prevent CO escape.
Warns about propane gas collection in confined spaces.
Caution against bypassing door switch or touching controls.
Emphasizes blower door security for fume containment.
Alerts to hazards of electrical components and fans during installation.
Instructs to shut off gas valve during overheating.
Advises against connecting furnace to GFCI protected circuits.
Advises caution with sharp metal edges during installation/servicing.
Warns not to touch the igniter as it is extremely hot.
Discourages use as a construction heater to prevent damage.
Warns about UV light exposure damaging plastic blower housing.
Provides steps for safe venting system commissioning.
Lists major components of the furnace.
Details technical data for various furnace models.
Lists essential safety measures for furnace installation.
Provides general advice on following codes and handling equipment.
Specifies minimum clearances to combustible materials for furnace placement.
Illustrates physical dimensions and connection points of furnace cabinets.
Shows typical wiring connections for thermostats and furnaces.
Details the Integrated Furnace Control (IFC) terminal layout.
Provides data on airflow (CFM) at different static pressures for models.
Shows CFM vs. temperature rise for single-stage heating.
Shows CFM vs. temperature rise for two-stage heating.
Instructions for removing furnace front panels for access.
Guidelines for installing furnaces in horizontal positions.
Illustrates gas piping configurations for various furnace orientations.
Provides tables for gas pipe sizing and orifice drill sizes.
Details procedures for checking combustion and gas input rates.
Explains how to adjust manifold pressure and gas valve settings.
Covers derating for altitude and selecting replacement orifices.
Outlines general principles for furnace venting.
Provides guidance for connecting to masonry chimneys.
Specifies rules for venting into internal masonry chimneys.
Warns about chimney liner inspection to prevent CO leaks.
Details type of chimney lining and venting practices.
Discusses practices to minimize corrosion in external chimneys.
Specifies requirements for combustion and ventilation air supply.
Provides guidelines for connecting supply and return air ducts.
Illustrates supply duct connections for various furnace orientations with coils.
Details requirements for return duct system installations.
Specifies rules for return duct placement and installation.
Shows mounting and filter box options for upflow furnaces.
Illustrates duct connections for downflow furnaces with top returns.
Lists filter sizes and preparation steps for upflow installations.
Explains filter installation for horizontal furnace configurations.
Details wiring requirements and safety precautions.
Provides diagrams for connecting thermostats to furnace controls.
Illustrates wiring diagrams for connecting two furnaces together.
Lists checks to perform before initial furnace start-up.
Describes the automated ignition sequence for furnace start-up.
Details how to adjust and check safety switches like limit switches.
Shows approved venting configurations for upflow furnaces.
Illustrates venting options for horizontal right furnace installations.
Displays approved venting configurations for downflow furnaces.
Explains how to orient flue outlets and cutouts for combustion air.
Outlines the menu structure for single-stage S8B1/S8X1 furnaces.
Details the menu structure for two-stage S8X1 furnaces.
Describes the menu structure for single-stage S8X2 furnaces.
Outlines the menu structure for two-stage S8X2 furnaces.
Explains how to enter and perform diagnostic tests on the furnace.
Describes how to view the furnace’s current operating status.
Shows measurements for belly band placement to minimize motor vibration.
Guides on measuring ESP and setting blower speed taps for optimal airflow.
Lists available menu options for the Integrated Furnace Control.
Provides a list of error codes and their explanations.
Instructions for viewing, clearing faults, and resetting factory defaults.
Lists the troubleshooting flowcharts available in the manual.
Initial steps for troubleshooting furnace issues.
Troubleshooting flowchart for 2.1 Fault Code related to ignition.
Troubleshooting flowchart for 2.2 Fault Code concerning flame sensing.
Troubleshooting flowchart for 2.3 Fault Code related to gas valve energization.
Troubleshooting flowchart for 3.1 Fault Code concerning pressure switch 1.
Troubleshooting flowchart for 3.2 Fault Code concerning pressure switch 1 errors.
Troubleshooting flowchart for 3.3 Fault Code concerning pressure switch 2.
Troubleshooting flowchart for 3.4 Fault Code concerning pressure switch 2 errors.
Troubleshooting flowchart for 4.0 Fault Code related to blower motor and limits.
Procedure to check the reverse flow switch operation.
Troubleshooting flowchart for flame rollout faults.
Troubleshooting flowchart for 5.0 Fault Code related to flame sensing.
Troubleshooting flowchart for 6.1 Fault Code concerning polarity.
Troubleshooting flowchart for 6.2 Fault Code concerning ground connections.
Troubleshooting flowchart for 6.3 Fault Code related to igniter issues.
Troubleshooting flowchart for 7.1 Fault Code concerning external gas valve circuit.
Troubleshooting flowchart for 08 Fault Code related to flame sense current.
Troubleshooting flowchart for 11 Fault Code related to internal gas valve relays.
Troubleshooting flowchart for 12 Fault Code related to the onboard fuse.
Steps for troubleshooting the constant torque blower motor.
Describes timing for EAC and HUM relays during operation.
Details the operational sequence for 1st stage gas heating.
Explains the operational sequence for 2nd stage gas heating.
Outlines the operational sequence for single-stage cooling.
Details the operational sequence for two-stage cooling.
Explains the operational sequence for single-stage heat pump operation.
Describes the operational sequence for two-stage heat pump operation.
Annual inspection checklist for furnace installation and components.
Recommendations for filter cleaning or replacement frequency.
Guidance on blower motor lubrication and annual cleaning.
Information on the hot surface igniter and handling precautions.
Instructions for burner cleaning and troubleshooting yellow flames.
Guidance on inspecting and cleaning heat exchangers and flue pipes.
Importance of checking and cleaning condensate drains to prevent water damage.
General