What actions are required before reusing space after discharge?

What actions are required before reusing space after discharge?

• A. Replacing hood grease filters only
• B. Waiting 24 hours
• C. Cleaning affected areas and recharging the system
• D. Repainting walls

Answer: (C)

When a wet chemical Class K fire suppression system discharges, the space must be returned to service only after thorough cleaning of all affected surfaces, equipment, and ductwork to remove the residue, and the extinguishing system must be recharged to restore full capacity. The agent leaves a residue throughout the hood area and piping, and the supply is depleted, so cleaning and recharging are necessary to ensure safe, effective future protection. Simply replacing filters won’t remove residue or restore the agent supply, and waiting, or repainting, doesn’t address the essential cleaning and recharge needs. Perform cleaning and recharge in accordance with the system manufacturer’s instructions and NFPA 17A.

When a wet chemical Class K fire suppression system discharges, the space must be returned to service only after thorough cleaning of all affected surfaces, equipment, and ductwork to remove the residue, and the extinguishing system must be recharged to restore full capacity. The agent leaves a residue throughout the hood area and piping, and the supply is depleted, so cleaning and recharging are necessary to ensure safe, effective future protection. Simply replacing filters won’t remove residue or restore the agent supply, and waiting, or repainting, doesn’t address the essential cleaning and recharge needs. Perform cleaning and recharge in accordance with the system manufacturer’s instructions and NFPA 17A.