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Need help?Do you have a question about the Grandaire WFAR Series and is the answer not in the manual?
Explains signal word usage and meaning in the manual.
Describes signal words used on product labels and their meanings.
Details hazards related to personal injury and property damage during operation and maintenance.
Outlines risks of electrical shock and necessary precautions.
Warns about carbon monoxide and fire risks associated with furnace operation.
Advises on precautions for handling sharp metal parts.
Covers essential steps for initial furnace setup and power connection.
Highlights potential issues with unit operation and safety switch usage.
Instructions for priming the condensate trap to prevent CO leakage.
Procedure for purging gas lines and checking for leaks.
Warns against improper orifice drilling that can damage the furnace.
Explains how altitude affects gas input rate and orifice selection.
Warns against improper adjustment of gas valve regulator screws.
Details how to verify the gas input rate using a meter clocking.
Describes risks of overheating heat exchangers or causing condensate issues.
Warns about electrical hazards when changing blower speed taps.
Instructions for adjusting the blower off-delay timer for comfort.
Steps for setting the heat anticipator on mechanical thermostats.
Procedures for verifying the function of safety controls like limit switches and pressure switches.
A list of final checks before operating the furnace.
Explains the meaning of different LED status codes for diagnostics.
Guides on how to recall and interpret stored fault codes.
General safety guidelines and warnings for service personnel.
Information on electrical controls, wiring, and troubleshooting.
Details on pressure switch operation and specifications.
Warning about electrical hazards when performing self-tests.
A list of checks to perform before starting maintenance tasks.
Instructions for cleaning or replacing the furnace air filter.
Safety warnings related to electrical shock, fire, explosion, and carbon monoxide.
Safety warnings for electrical shock, fire, and explosion during burner maintenance.
Procedure for flushing the collector box and drainage system.
Instructions for cleaning the condensate drain and trap.
Guidance on checking the heat pad for freeze protection.
Safety warnings for electrical shock, fire, and explosion during heat exchanger maintenance.
Cautions regarding damage to unit components and property during winterization.
Specific warning about using ethylene glycol for winterization.
Describes the operational sequence during heating cycles.
Details the operational sequence during cooling cycles.
Explains operation when the blower runs continuously.
Describes operation when used with a heat pump system.
Guide to interpreting flashing LED codes for fault diagnosis.
Steps for verifying thermostat signals and control responses.
Illustrates the physical wiring connections to the furnace control board.
Provides the electrical schematic for furnace operation and control.
Explains the coding system used for furnace model numbers.
General