Used to protect the total load or individual stages. High Rupture Capacity type (HRC Form 1).

Pilot lights are mounted on the control box to indicate that either a function of the heater is operating or a failure condition is present. The most commonly specified pilot lights functions are: power on, heating on, no airflow, overheating, stages on. The pilot lights' functio...

Safety feature, monitors the quantity of air flowing through the heater, adjusts the heater’s capacity to match the air flow available and shuts the heater down in case of a total loss of air. This feature is available only on heaters equipped with full SCR.