What requirement is established regarding the operation of exhaust fans and dampers upon system actuation?

The requirement that exhaust fans and dampers shall not be required to shut down upon system actuation is based on the need to ensure that the dry chemical extinguishing system can function effectively without unnecessary disruptions.

When a fire occurs, the primary goal of an extinguishing system is to suppress the fire as quickly as possible. If exhaust fans and dampers were mandated to shut down, it could impede the overall effectiveness of the extinguishing agent being deployed. The continuous operation of these systems helps to ventilate smoke and heat, allowing the dry chemical to effectively reach and suppress the fire.

This operational flexibility is crucial in scenarios where maintaining some level of airflow can help mitigate hazardous conditions while the fire is being addressed. The design and operation of the extinguishing system must take into account the dynamics of airflow during an event to ensure optimal performance and safety.