7
95-8546
17.3
INSTALLATION
NOTE
The recommended lubricant for threads and O-rings
is a silicone-free grease (p/n 005003-001) available
from Detector Electronics. Under no circumstances
should a lubricant containing silicone be used.
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.
• Verify that all detectors in the system are properly
located and positioned so that any fire hazards are
within both the Field of View (FOV) and detection
range of the detector. The Q1201C Laser Aimer
is recommended for establishing the detector's
FOV. Refer to Appendix A for specific information
regarding detector range and FOV.
• 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 FOV does not cover areas outside the area
that requires flame detection monitoring.
This will
minimize the possibility of false alarms caused by
activities outside the area requiring protection.
• The detector must be mounted on a rigid surface in
a low vibration area.
• Dense fog, rain as well as certain gases and vapors
(see Table 3) can absorb UV and IR radiation and
reduce the sensitivity of the detector.
• If possible, fire tests can be conducted to verify
correct detector positioning and coverage.
• For ATEX/IECEx installations, the detector housing
must be electrically connected to earth ground.
DETECTOR ORIENTATION
Refer to Figure 2 and ensure that the
oi
plate will be
oriented as shown when the detector is installed and
sighted. This will ensure proper operation of the
oi
system and will also minimize the accumulation of
moisture and contaminants between the
oi
plate and the
viewing windows.
IMPORTANT
If removed, the
oi
plate
must
be securely
tightened to ensure proper operation of the
oi
system (40 oz./inches [28.2 N .cm] recommended).
CENTER AXIS
OF DETECTOR
FIELD OF VIEW
CENTER AXIS
OF DETECTOR
FIELD OF VIEW
INCORRECT
CORRECT
NOTE: DETECTOR MUST ALWAYS BE AIMED
DOWNWARD AT LEAST 10 TO 20 DEGREES.
D1974
Figure 1—Detector Orientation Relative to Horizon
IR VIEWING WINDOW
UV VIEWING WINDOW
DETECTOR STATUS INDICATOR
oi
PLATE
PLACE MAGNET
HERE TO INITIATE
MAGNETIC
oi
oi
MAGNET
B2134
Figure 2—Front View of the Detector
