Honeywell FS20X Series User Manual page 10

FS20X Fire and Flame Detectors
2� Install the detector with the base horizontal� The view angle in this direction is 90° horizontal as shown
in the illustration� (The vertical angle is 80°, 45° below the center line and 35° above it)�
Figure 6� FS20X horizontal field of view
To comply with the requirements of FM3260, the maximum field of view (FoV) is the angle at which
the device can detect a flame at 50% of the maximum specified distance� Similarly, to comply with the
requirements of EN54-10:2002, the maximum field of view (FoV) is the angle at which the device can
detect a flame at 70% of the maximum specified distance� To comply with the directional dependence
requirements of EN 54-10:2002, an angle of ±40° (80°) from 0° (where 0° is the orientation of the
detector in the same axes as the flame source) must not be exceeded�
The FS20X UVIR Flame Detector Filed of View, as tested to EN54-10, is +/- 40 degrees in the
horizontal plane and +30/-40 degrees in the vertical plane, as shown below:
Figure 6b: FS20X EN54-10 FoV (Field of View)
14
FS20X Fire and Flame Detectors
Model SM4 is a 316 stainless steel swivel mount designed for the FS20X enclosure� The adapter plate
(with the two screw holes) is attached to the base of the detector (see
(four screw holes), can be secured to a solid surface� Angle adjustments are in 10° increments along
either axis� For single-axis adjustments, the center section need not be installed� Do not mount the
detector facing horizontally or above the horizon� Use at least a 30° downward angle with the swivel
mount� This is especially critical outdoors�
Adaptor plate
Mounting plate
Figure 7� SM4 swivel mount
3� Provide the detector an unobstructed view of the threat area� Obstructions between the detector and a
fire may prevent it from being detected�
4� Mount the detector in an area where temperatures will not exceed the specified operating temperature
range (see "Environmental" on page 35 and
5� Conduit entries
a� If only one conduit entry is used, install and seal the conduit plug on the unused entry (¾ in� NPT
or 25mm, as shown in Figure 8)�
Figure 8� Detector, front view
Figure 7)� The mounting plate
"Hazardous Area Classifications" on page 35)�
15