Which option is not a pilot for a gas burner?

In the context of gas burners, a manual pilot refers to a traditional ignition method that requires human intervention to light the pilot flame. In contrast, other options such as electronic pilots, hot surface pilots, and infrared pilots are all automated systems designed to ignite the burner without direct human involvement in the lighting process.

Electronic pilots utilize a spark or a constant flame from an igniter to automatically light the burner when gas flows. Hot surface pilots employ heating elements that glow red hot, igniting the gas when it is released. Infrared pilots utilize infrared radiation to ignite the gas, functioning effectively even with lower gas flows.

These automated systems enhance safety and efficiency in gas burner operations, eliminating the need for manual lighting, which can be less reliable and poses a greater risk of accidental ignition or extinguishment. Thus, the manual pilot is the only option listed that does not fall under the category of automated ignition systems used in contemporary gas burners.