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UV Absorbing Gases and Vapors
The following is a partial list of compounds that exhibit
significant UV absorption characteristics. These are
also usually hazardous vapors. While generally of little
consequence in small amounts, these gases can restrict
UV detection if they are in the atmosphere in heavy
concentrations. It should also be determined whether or
not large amounts of these gases may be released as a
result of a fire-causing occurrence.
Acetaldehyde
Acetone
Acrylonitrile
Ethyl Acrylate
Methyl Acrylate
Ethanol
Ammonia
Aniline
Benzene
1,3 Butadiene
2—Butanone
Butylamine
Chlorobenzene
1-Chloro-1-Nitropropane
Chloroprene
Cumene
Cyclopentadiene
O-Dichlorobenzene
P-Dichlorobenzene
If UV-absorbing gases may be a factor in a given application,
precautionary measures should be taken. Detectors can
be placed closer to the potential hazard area, and/or
the sensitivity of the detection system can be increased.
Contact the factory for further details.
Substances such as methane, propane, butane, hexane,
camphor and octane are not UV absorbing.
8.3
Table 3
Methyl Methacrylate
Alpha-Methylstyrene
Naphthalene
Nitroethane
Nitrobenzene
Nitromethane
1-Nitropropane
2-Nitropropane
2-Pentanone
Phenol
Pyridine
Hydrogen Sulfide
Styrene
Tetrachloroethylene
Toluene
Trichloroethylene
Vinyl Toluene
Xylene
IMPORTANT SAFETY NOTES
Do not open the detector assembly in a hazardous
area when power is applied. The detector contains
limited serviceable components and should never
be opened. Doing so could disturb critical optical
alignment and calibration parameters, possibly
causing serious damage. This type of damage
could be undetected and could result in failure to
see a fire and/or false alarm.
The wiring procedures in this manual are intended
to ensure proper functioning of the device under
normal conditions. However, because of the
many variations in wiring codes and regulations,
total compliance to these ordinances cannot be
guaranteed. Be certain that all wiring complies
with the NEC as well as all local ordinances. If
in doubt, consult the authority having jurisdiction
before wiring the system. Installation must be
done by a properly trained person.
To prevent unwanted actuation or alarm,
extinguishing devices must be disabled prior to
performing detection system tests or maintenance.
The UV flame detectors are to be installed in places
where the risk of mechanical damages is low.
Remove the protective cap from the front of the
detector before activating the system.
Observe precautions for handling electrostatic
sensitive devices.
5
WARNING
CAUTION
CAUTION
CAUTION
ATTENTION
ATTENTION
95-8549
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