Detection devices that are bulb-type automatic sprinklers and fusible links not of metal alloy type shall be examined and cleaned or replaced at least what interval?

• A. Daily
• B. Weekly
• C. Monthly
• D. Annually

Answer: (D)

Bulb-type detection elements and non-metallic fusible links are heat-activated release devices used in kitchen hood suppression systems. They can be affected by cooking vapors, grease buildup, moisture, and aging, which can compromise their ability to trigger the system when needed. Because of these potential issues, they should be examined and cleaned or replaced on a once-a-year basis. This interval provides a reliable balance between ensuring system readiness and avoiding excessive maintenance.

During the annual inspection, look for broken or discolored glass bulbs, damaged protective covers, corrosion, or any buildup that could insulate heat or physically impede the device. Clean any residue that could affect performance, and replace components that show damage or degradation. Daily, weekly, or monthly checks aren’t practical for these release devices; annual maintenance keeps them dependable without unnecessary disruption.