How many different voltages are required for a hot surface ignition module using a 120V hot surface igniter?

A hot surface ignition module typically requires two different voltages to operate effectively, which aligns with the correct response. The hot surface igniter, which operates at 120V, is used to heat up and ignite the gas in the combustion chamber. However, the control circuitry within the ignition module often operates on a lower voltage, commonly 24V. This dual-voltage requirement allows the module to initiate the igniter's heat while ensuring safe operation and control of the appliance.

Using 120V for both the igniter and the control system would present safety risks and potential overloads, which is why the separation into 120V for the igniter and 24V for the control circuit is standard practice. This design approach is crucial in commercial food service equipment where safety and efficiency are paramount.