In enclosed areas, if dense smoke is expected to accumulate at the onset of the fire, the detectors
should be mounted 1 to 2m below the ceiling level.
5.6
onse to a fire is a function of the fuel source and how it is released, fire size
and distance, orientation to the detector and local ambient conditions. The typical figures are
based on in-house tests except where marked with the FM logo these test were conducted and
certified by Factory Mutual. As with all tests the results must be interpreted according to the
individual application taking into account all possible variables.
The detector sensitivity to different fuel sources is dependent on the a
the detectors typical response is shown below (see table 6).
Table 4: T
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Fuel Fire Size Distance
Methane Jet Fire 3ft plume 30m (100 feet)
Ethanol 0.3m x 0.3m pan
25m (85 feet)
Diesel 0.3m x 0.3m pan
40m (130 feet)
Crude Oil (heavy fuel oil) Pan Fire 0.5m x 0.5m pan
40m (130 feet)
Wax Inhibitor (Clear 10) Pan Fire 0.3m x 0.3m pan
40m (130 feet)
Anti-Foam (Surflo AF-300) Pan Fire 0.3m x 0.3m pan
40m (130 feet)
Wood Stack 0.3m x 0.3m crib
40m (130 feet)
n-Heptane Pan Fire 0.3m x 0.3m pan
44m (144 feet)
n-Heptane Pan Fire in direct sunlight 0.3m x 0.3m pan
44m (144 feet)
n-Heptane Pan Fire in modulated sunlight 0.3m x 0.3m pan
44m (144 feet)
n-Heptane Pan Fire in the presence of modulated black
body radiation
0.3m x 0.3m pan
44m (144 feet)
n-Heptane Pan Fire in the presence of Arc welding 0.3m x 0.3m pan
44m (144 feet)
n-Heptane Pan Fire in the presence of a 1000watt lamp 0.3m x 0.3m pan
44m (144 feet)
Gasoline pan Fire 0.3m x 0.3m pan
44m (144 feet)
JP4 0.6m x 0.6m pan
61m (200 feet)
Silane 0.6m plume 13m(42 feet)
FDS301 Flame Detector FDS301 Safety and Technical Manual
23
Ref: 2200.5009 Rev: 2.3 ECN 4434
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