Manual actuation shall be permitted under what condition?

• A. Manual actuation is allowed in all situations.
• B. Manual actuation is permitted only with written authorization.
• C. Manual actuation is never permitted.
• D. Manual actuation is permitted if acceptable to the authority having jurisdiction.

Answer: (D)

Manual actuation is allowed only if acceptable to the authority having jurisdiction. In clean agent systems, release can be automatic or manual, but the option to actuate manually must be reviewed and approved by the AHJ to ensure safe and appropriate use for that occupancy. The AHJ weighs factors such as occupant presence, egress considerations, potential for inadvertent activation, and how the manual release integrates with alarms and detection. If the AHJ approves, a labeled, accessible manual release can be incorporated under the system design; if not approved, manual actuation is not permitted.