ETL 1110-3-484
26 Sep 97
systems should be closely matched to automatic sprinkler temperature ratings. Thus, designers
should specify detector temperature ratings of 71oC to 76oC (160oF to 170oF) unless other ratings
are mandated by applicable design criteria or ambient conditions.
10.7.2.2 Optical Detectors. Where required by applicable design criteria, provide optical
detectors of the dual spectrum ultraviolet-infrared type. Specify detectors to be certified by a
nationally recognized testing laboratory to be capable of detecting a fully developed 3 m x 3 m.
(10 ft x 10 ft) JP-4, JP-8 or JET-A fuel fire at minimum distance of 45 m (148 ft) within 5
seconds. Provide a sufficient number of detectors at approximately 3 m (10 ft) above the hangar
floor so the a fire developing in the under-aircraft area will be in the cone of vision of at least one
detector. Connect detectors to the foam system control panel (FSCP) and arrange for alarm-only
unless design direction from the customer requires arranging detectors for nozzle system
actuation. Do not arrange optical detectors to actuate overhead sprinkler systems.
10.7.2.3 Nozzle System Manual Actuation Stations. Provide manual stations for activation of
foam-water nozzle systems. Specify stations to have distinctive labeling and coloring to
differentiate these stations from manual fire alarm stations. Provide a clear plastic tamper-
resistant enclose to protect the station from accidental operation.
B-17
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