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3.3
EMI/RFI Interference
The X3302 is resistant to interference by EMI and RFI,
and is EMC Directive compliant. It will not respond to a 5
watt walkie-talkie at distances greater than 1 foot. Do not
operate a walkie-talkie within 1 foot of the X3302.
Carbon Containing Fires
The X3302 is a multiple spectrum IR device with detection
limited to flames that produce water vapor as a by-product
of combustion. These include hydrogen, ammonia,
arsine, silane, and light hydrocarbons such as methane
and methanol. Some lighter carbonaceous fuels may be
detectable by the X3302, but heavier carbon containing
substances that burn with a dark yellow-orange flame
and emit dense sooty smoke may not be sensed with this
device. Other fuels that are not detectable include sulfur
and burning metals.
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. This type of damage
could be undetected and could result in failure to
see a fire and/or false alarm.
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 system tests or maintenance.
attEntIon
Remove the protective cap from the front of the
detector before activating the system.
attEntIon
Observe precautions for handling electrostatic
sensitive devices.
INSTallaTION
DETECTOR pOSITIONING
Detectors should be positioned to provide the best
unobstructed view of the area to be protected. The following
factors should also be taken into consideration:
Identify all high risk fire ignition sources.
•
Be sure that enough detectors are used to adequately
•
cover the hazardous area.
Be sure that the unit is easily accessible for cleaning
•
and other periodic servicing.
Locate and position the detector so that the fire
•
hazard(s) are within both the field of view and
detection range of the device. Refer to Appendix for
specific information.
Multispectrum IR detectors are less likely than
•
other detectors to false alarm to non-flame infrared
sources, as verified by the data shown in the “False
Alarm Immunity” table (page 19) in the Appendix.
However, in some instances, sustained modulation
of these sources will cause a level of desensitization
resulting in diminished detection range (refer to
“Modulated Source” table [page 20] in the Appendix).
For this reason, the X3302 should be sited/located to
avoid these sources if there is likely to be frequent,
sustained modulation of IR sources such as those
shown. It is important to point out that these same
sources have no effect on sensitivity if there is no
modulation (refer to “Unmodulated Source” table
[page 20] in the Appendix).
The detector should be aimed downward at least 10
•
to 20 degrees to allow lens openings to drain. See
Figure 1.
The detector should be positioned so
that its field of view does not cover areas outside
the hazardous area.
This will minimize the possibility
of false alarms caused by activities outside the area
requiring protection.
For best performance, the detector should be
•
mounted on a rigid surface in a low vibration area.
Dense fog, rain or ice can absorb IR radiation and
•
reduce the sensitivity of the detector.
For ATEX installations, the X3302 detector housing
•
must be electrically connected to earth ground.
