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Explains the use of signal words like WARNING and CAUTION within the manual.
Describes how signal words are used on product labels with colors and pictures.
Warns about hazards related to improper installation, alteration, or service.
Advises turning off power before servicing to prevent electrical shock.
Warns about the risks of carbon monoxide poisoning and fire.
Alerts to sharp edges on sheet metal parts during servicing.
Procedure to prime the condensate trap to prevent carbon monoxide entry.
Instructions for purging gas lines and checking for leaks to prevent fire or explosion.
Warns against improper gas valve regulator adjustment to prevent hazards.
Caution against redrilling orifices to prevent burner noise and damage.
Guidance on adjusting manifold pressure based on altitude and gas heat value.
Caution against overheating and shortened furnace life when checking temperature rise.
Warning about electrical hazards when adjusting blower speed for temperature rise.
Instructions for adjusting the blower off-delay timer for heating mode.
Guidance on setting cooling airflow using blower speed taps.
Procedure for setting the thermostat heat anticipator based on amp draw.
Procedures for checking main limit switch and pressure switches.
Lists critical warnings for fire, injury, death, environmental, and electrical hazards.
Advises on labeling wires and avoiding dangerous operation.
Steps to retrieve fault codes from the furnace control for diagnostics.
Procedure to initiate a self-test of furnace components.
Emphasizes precautions against fire, explosion, and electrical hazards.
Instructions for cleaning or replacing the external air filter.
Procedure for cleaning primary heat exchangers for light dirt or dust.
Notes that secondary heat exchangers require complete removal for inspection.
Steps for winterizing the furnace in freezing temperatures to prevent damage.
Instructions on how to initiate status code recall and component testing.
Explains the meaning of various LED status codes for troubleshooting.
Starting point for troubleshooting, checking power and basic conditions.
Steps for interpreting status codes and checking thermostat signals.
Detailed steps of the furnace operation during a heating cycle.
Detailed steps of the furnace operation during a cooling cycle.
How the blower operates in continuous fan mode.
How the furnace operates when connected to a heat pump.
Emphasizes safety hazards during installation and modification of the product.
General
