Igniter: A permanently
installed device that provides proven ignition energy to light off the main
burner.
Class 1 Igniter. An igniter that is applied to ignite
the fuel input through the burner and to support ignition under any burner
light-off or operating conditions. Its location and capacity are such that it
will provide sufficient ignition energy, generally in excess of 10 percent of
full load burner input, at its associated burner to raise any credible
combination of burner inputs of both fuel and air above the minimum ignition
temperature.
Class 2 Igniter. An igniter that is applied to ignite
the fuel input through the burner under prescribed lightoff conditions.
It is also used to support ignition under low load or certain adverse operating
conditions. The range of capacity of such igniters is generally 4 percent to 10
percent
of full load burner fuel input.
Class 3 Igniter. Asmall igniter
applied particularly to fuel gas and fuel oil burners to ignite the fuel input
to the burner under prescribed light-off conditions. The capacity of such
igniters generally does not exceed 4 percent of the full load burner fuel input.
Class 3 Special Igniter. A special Class 3 high energy
electrical igniter capable of directly igniting the main burner fuel.