A cad cell control will go to the lock-out position when the reading is what?

A cad cell control (cadmium sulfide cell) is a type of safety device used in oil heating systems to monitor the presence of flame. When it detects a sufficient amount of light from the flame, it allows the burner to operate. However, if the light intensity falls below a certain threshold, indicating that the flame is not present or is inadequate, the cad cell control will enter a lock-out position to prevent the burner from continuing to try to operate.

In this context, the reading that triggers the lock-out condition is specifically set at 1601 or lower. This means that when the flame light intensity detected by the cad cell drops to 1601 or less, it indicates that the flame is either extinguished or not burning properly. As a safety measure, the burner is locked out to prevent unburned oil from accumulating, which could cause a hazardous situation.

This threshold is integral to ensuring the safety and efficiency of the heating system. Proper calibration and maintenance of the cad cell control are essential to ensure that it responds correctly to flame presence, thus safeguarding both the equipment and the environment.