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Explains signal words for hazards like death, injury, or property damage.
Lists numbered safety precautions for installation, servicing, and operation.
Details steps to prevent CO poisoning when placing appliances into operation.
Warns about hazards including fire, explosion, and damage.
Emphasizes adherence to local codes and National Fuel Gas Code.
Warns against use as a construction heater and in corrosive atmospheres.
Details requirements for furnace location, servicing space, and clearances.
Describes attaching cased coils to the furnace for upflow applications.
Details requirements for supporting furnaces and coils in horizontal installations.
Explains the need for adequate airflow for combustion and ventilation.
Lists specific installation types and chemical exposures requiring outdoor air.
Defines space types and their impact on air supply for furnaces.
Warns about filter placement in horizontal applications and safety during servicing.
Differentiates between direct and nondirect vent systems.
Mandates CO detectors and signage for side wall vented appliances.
Specifies compliance standards for carbon monoxide detectors.
Details requirements for permanent signage near exhaust vents.
Provides a wiring diagram for a single-stage furnace with thermostat.
Diagram for a furnace with a heating/cooling thermostat.
Covers safe electrical connections, grounding, and circuit protection.
Wiring diagram for twinning furnaces with single wire feature (heat only).
Details connecting gas supply, manual shut-off, drip leg, and safety cautions.
Details the process for adjusting manifold pressure on the gas valve.
Explains how to adjust input rate for installations above 2,000 ft.
Provides steps and safety warnings for lighting the furnace burners.
Explains how to test the safety limit switch for proper operation.
Table 21 lists error flash codes for the integrated furnace control.
General