Historical
ANSI Z21.20-2007/C22.2 No. 199-2007
Automatic Gas Ignition Systems and Components
Details test and examination criteria for complete burner ignition systems, and components that perform one or more of the following functions: Ignite the fuel at the main burner(s), or at the pilot burner(s); Prove the presence of either the ignition source, or main burner flame; Automatically act to shutoff the fuel supply to the burner(s), when the supervised flame or ignition source is not proved; and Shutoff the the gas supply when the oxygen content in the room is reduced to a predetermined level.
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