Det-Tronics X5200 UVIR Flame Detector - Manual (Page 8)

95-8546 6 13.1
ImPORTaNT SafETy NOTES
WarnIng
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.
CaUtIon
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.
CaUtIon
To prevent unwanted actuation or alarm,
extinguishing devices must be disabled prior to
performing detection system tests or maintenance.
CaUtIon
The UVIR flame detectors are to be installed in
places where the risk of mechanical damage is low.
attEntIon
Remove the protective cap from the front of the
detector before activating the system.
attEntIon
Observe precautions for handling electrostatic
sensitive devices.
attEntIon
The source tube is a flame-sealed gas tube
containing Neon, Hydrogen, and a trace amount
of Krypton 85 (Kr
85 ), a radioactive material. The
total volume of gas within the tube is 0.6 ml per
tube, making the gas mixture inside the tube
nonflammable. If the gas envelope is broken, it
will not produce a flammable mixture, and the gas
immediately disperses into the air and is unlikely
to present any type of hazard. Krypton gas and its
radioactive isotope are inert and are not absorbed
by the body. No special handling measure or
personal protection equipment is needed for the
UVIR detectors.
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 methyl methacrylate
acetone alpha-methylstyrene
acrylonitrile Naphthalene
Ethyl acrylate
Nitroethane
methyl acrylate Nitrobenzene
Ethanol Nitromethane
ammonia 1-Nitropropane
aniline 2-Nitropropane
benzene 2-Pentanone
1,3 butadiene
Phenol
2—butanone Pyridine
butylamine
hydrogen Sulfide
Chlorobenzene Styrene
1-Chloro-1-Nitropropane Tetrachloroethylene
Chloroprene Toluene
Cumene Trichloroethylene
Cyclopentadiene
Vinyl Toluene
O-Dichlorobenzene Xylene
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 .
absorption of infrared radiation in the range of 4 .2 to 4 .7
microns is not a significant problem with most organic
vapors, with the exception of those compounds that
have triple bonds such as acetylene, nitriles, silane, or
isocyanates . Carbon dioxide concentrations higher than
normally present in the atmosphere can also cause
substantial loss of fire detection sensitivity .
Table 3—UV and IR absorbing gases and Vapors