What is the maximum safety drop-out time for units equipped with thermocouples?

The maximum safety drop-out time for units equipped with thermocouples is set at 3 minutes to ensure rapid response in case of an emergency, such as the loss of flame or proper temperature. This relatively short duration helps to prevent the accumulation of unburned gas and reduces the risk of potential hazards associated with prolonged operation without a stable flame.

Thermocouples are widely utilized in safety systems due to their reliability and swift reaction to temperature changes. The decision to establish a 3-minute threshold stems from the balance between adequate time for potential system recovery and the necessity to prioritize safety in gas applications. Setting the drop-out time too long could lead to unsafe conditions if an ignition source is absent. Thus, 3 minutes provides a reasonable window for reaction while effectively mitigating risks.