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Started by seuenergy, Dec 01 2022 10:47 AM

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Veteran Member

Posted 01 December 2022 - 10:47 AM

hi, all

There are three types(class 1/2/3) of igniters in NFPA85.

Where Class 1 igniters are provided, the main burner flame shall be proven either by the flame detector or by the igniter being proven.

Burners with Class 2 igniters shall have at least two flame detectors.

Burners with Class 3 igniters shall have at least one flame detector.

why the requirement of Class 3 is lower than Class 2?

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