Manual operation only shall be permitted for foam-water deluge systems under what condition?

Manual operation only shall be permitted for foam-water deluge systems under what condition?

• A. If Manual Operation Is Available
• B. When Automatic Tripping Is Unavailable
• C. Where Acceptable to the AHJ
• D. For Testing Purposes Only

Answer: (C)

Manual operation is permitted only where acceptable to the Authority Having Jurisdiction. This ensures that any hand-actuated release is evaluated for safety, reliability, and proper coordination with the system’s automatic detection and alarms. With AHJ approval, explicit procedures, interlocks, and testing can be established to prevent unintended foam discharge and to maintain protection during maintenance or special conditions. Other options don’t capture the regulatory safety requirement that governs whether manual actuation is allowed at all.

Manual operation is permitted only where acceptable to the Authority Having Jurisdiction. This ensures that any hand-actuated release is evaluated for safety, reliability, and proper coordination with the system’s automatic detection and alarms. With AHJ approval, explicit procedures, interlocks, and testing can be established to prevent unintended foam discharge and to maintain protection during maintenance or special conditions. Other options don’t capture the regulatory safety requirement that governs whether manual actuation is allowed at all.