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Explains how signal words WARNING and CAUTION are used in the manual to highlight hazards.
Explains the use of signal words on product labels, often combined with colors or pictures.
Indicates manufacturer's participation in the AHRI certification program for verification of product performance.
Details hazards like carbon monoxide poisoning, explosion, fire, and electrical shock from improper installation or maintenance.
Cautions against improper installation affecting unit component damage, especially regarding vent sizing, material, gas input, and leveling.
Provides essential safety rules including wearing protective gear, reading instructions, and following codes like NFGC and NEC.
Specifies minimum required clearances from combustible materials for furnace installation, varying by orientation.
Describes the multipoise furnace, its design certification, fuel type, and installation limitations for mobile homes and outdoors.
Lists national and local codes and standards required for installation, including NFGC, NFPA 90B, NEC, and others.
Provides detailed steps to prevent damage to electronic components from static electricity during installation and servicing.
Outlines general requirements for furnace installation, including electrical protection from water and placement relative to combustible materials.
Details the need for adequate air supply for combustion, ventilation, and dilution, considering various environmental exposures.
Specifies safety requirements for installing furnaces in residential garages, including burner height and protection from vehicles.
Lists conditions and precautions for using the furnace for heating buildings under construction to prevent negative pressure and ensure proper operation.
Warns against installing the furnace on its back or hanging it with the control compartment facing downward, as it affects safety control operation.
Warns that air for combustion must not be contaminated by halogen compounds, which can corrode heat exchangers and shorten furnace life.
Details the requirements for providing sufficient outdoor air for combustion, ventilation, and dilution, including specific methods and opening sizes.
Instructions for installing the bottom closure panel for upflow applications with a bottom return air inlet.
Guidance on using side return air inlets in upflow and horizontal configurations, noting restrictions for downflow.
Provides diagrams and dimensions for floor and plenum openings required for downflow installations, including combustible flooring.
Describes methods for supporting the furnace in horizontal installations, including suspended and platform supports.
Notes that an external filter rack is required and specifies the filter size needed for the furnace.
Outlines standards for designing duct systems, including ACCA, SMACNA, and ASHRAE, and connection requirements for supply and return air.
Discusses the need for acoustical lining or fibrous ductwork for metal duct systems to reduce noise transmission.
Details requirements for gas piping installation, including local codes, pipe length, support, and leak testing procedures.
Explains how to connect return air ducts for downflow, upflow, and horizontal furnace orientations, referencing specific figures.
Illustrates the top view of the burner and manifold assembly, showing gas valve and piping connections.
Depicts typical gas pipe arrangements, including sediment traps, unions, and test gauge connections.
Provides instructions for relocating the electrical junction box (J-Box) if the factory location is not suitable.
Warns about electrical shock and fire hazards, emphasizing proper grounding, wire gauge, and disconnect switch requirements.
Details 115-V wiring requirements, including polarity, grounding, separate fused circuits, and the use of copper wire.
Guides on installing electrical boxes, including J-box relocation and connecting field-supplied electrical boxes to the furnace casing.
Provides a table with electrical specifications, including voltage, ampacity, wire size, and fuse/breaker requirements for various furnace models.
Instructions for installing BX cable and power cords into the furnace J-box, ensuring proper connections and grounding.
Details the furnace control board, including LED status indicators, terminal connections, and fuse protection for the 24-V circuit.
Presents wiring diagrams for heating and cooling applications with single-stage thermostats, including 24-V and 115-V wiring configurations.
Explains how to connect accessories like Electronic Air Cleaners (EAC) and humidifiers to the furnace control board.
Outlines essential requirements for vent sizing and installation, adhering to NFGC and local codes.
Addresses hazards related to carbon monoxide poisoning when venting appliances, including proper testing procedures and system corrections.
Details requirements for using masonry chimneys, including inspection, relining, and the use of adapter kits, referencing NFPA standards.
Provides precautions to prevent condensation in the furnace and vent system, including return-air temperature, gas input rate, and air temperature rise adjustments.
Specifies requirements for masonry chimney installations with Type-B double wall vent connectors, including input ratings.
Details requirements for vent connector sizing and the use of increaser fittings when required for specific furnace models.
States that sidewall venting is not approved for direct horizontal venting and outlines requirements when a mechanical venter is used.
Provides a table specifying minimum vertical vent heights for various furnace orientations and inputs, adhering to NFGC codes.
Shows diagrams for upflow furnace applications with vent elbows directed up or to the right.
Illustrates downflow furnace applications with vent elbows configured up, or up then left.
Shows diagrams for downflow furnace applications with vent elbows directed left then up, or up then right.
Illustrates various vent elbow configurations for horizontal furnace installations, including left and right orientations.
Covers initial checks before operating the furnace, including electrical connections, thermostat settings, and safety control verification.
Outlines steps for safely starting the furnace, including purging gas lines and checking for leaks using a non-flammable method.
Provides a table for adjusting gas input rates based on altitude and specific gravity of natural gas, with corresponding orifice sizes and manifold pressures.
Details the procedure for verifying the natural gas input rate by clocking the meter and adjusting manifold pressure.
Explains how to set the air temperature rise by adjusting blower speed for optimal furnace operation.
Warns about potential furnace overheating and the importance of checking temperature rise within specified limits.
Guides on setting the thermostat heat anticipator and adjusting the heat off delay for optimal system performance.
Outlines procedures for checking main limit switches and draft safeguard switches to ensure proper safety function.
Provides a checklist of tasks to be completed after installation and before final handover, including tool cleanup and user guidance.
Offers a table to determine gas rate based on test dial revolutions, aiding in input rate verification.
Specifies filter sizes required for side and bottom return configurations, noting filter types.
Presents a detailed table for orifice size and manifold pressure settings based on altitude, heat value, and natural gas specific gravity.
Explains the furnace control's LED status codes and troubleshooting guide, referencing the service label.
Introduces the service section, emphasizing the need for qualified personnel and proper safety precautions before performing maintenance.
Covers electrical safety, wiring requirements, control board status codes, and troubleshooting tips for electrical issues.
Stresses the importance of periodic maintenance for high performance and equipment longevity, recommending consultation with a dealer.
Warns against storing flammable materials near the furnace and highlights electrical safety precautions before servicing.
Warns about carbon monoxide hazards and the necessity of using a filter with the access door installed.
Provides detailed instructions for cleaning the blower motor and wheel to ensure long life and efficiency, emphasizing safety during the process.
Warns that improper air temperature rise adjustment can shorten heat exchanger life and must be corrected.
Outlines steps for cleaning heat exchangers, emphasizing the need for qualified personnel and specific cleaning agents if necessary.
Describes the step-by-step sequence of operation during a heating call, from thermostat activation to burner ignition and blower operation.
Explains the furnace operation sequences for cooling mode and heat pump applications, including blower timing and control logic.
Provides a flowchart to diagnose and troubleshoot single-stage furnace operation issues based on LED status codes and basic checks.
General