[F] 916.8 System Activation
A gas detection alarm shall be initiated where any sensor detects a concentration of gas exceeding the following thresholds:
- For flammable gases, a gas concentration exceeding 25 percent of the lower flammability limit (LFL).
- For nonflammable gases, a gas concentration exceeding one-half of the IDLH, unless a different threshold is specified by the section of this code requiring a gas detection system.
Upon activation of a gas detection alarm, alarm signals or other required responses shall be as specified by the section of this code requiring a gas detection system. Audible and visible alarm signals associated with a gas detection alarm shall be distinct from fire alarm and carbon monoxide alarm signals.