What testing does NFPA 2001 require after system installation?

• A. Acceptance testing for alarm sounds and manual release procedures.
• B. Functional check of all devices with no concentration verification.
• C. Inspection of the physical integrity of the piping.
• D. Acceptance testing for detection, release actuation, alarm signals, and attainment of the design agent concentration.

Answer: (D)

The main idea is that after installation, the system must undergo an acceptance test that proves everything works together as designed. This test verifies four critical elements: the detection system properly triggers the release, the release actuation devices operate to discharge the agent, the alarm signaling functions to alert occupants, and the space reaches the design agent concentration needed to suppress the fire. Verifying the actual concentration ensures the chosen clean agent will provide the intended protection, not just that components activated or alarms sounded. Options that test only alarms and manual release, or only check individual devices without concentration verification, or only inspect piping integrity, don’t demonstrate the system’s full readiness. Hence, acceptance testing that covers detection, release actuation, alarm signals, and attainment of the design agent concentration is required.