Electrical description
The detector signals an alarm state by switching an alarm latch
on increasing the current drawn from the supply from 550 µA to a
maximum of about 75 mA. This fall in impedance of the detector is
recognised by the control panel as an alarm signal.
The alarm current also illuminates the detectors integral LEDs. A
remote indicator connected between the L1 In terminal and the -R
terminal will have a voltage equal to the supply voltage less one
volt across it and so will illuminate.
To ensure correct operation of the detector the control panel must
be arranged to supply a maximum of 28 V dc and a minimum of
12 V dc in normal operation.
The supply may fall to 6 V dc in alarm conditions if a supply current
of at least 10 mA is available at this voltage.
To ensure effective illumination of the integral LEDs and any
remote indicator, the supply to the detector should exceed 12 V.
To restore the detector to a quiescent condition, ensuring all
flames are extinguished , interrupt the supply to the detector for a
minimum of one second.
Note:
When using the detector avoid; locating in an area with an
outside view, UV lamps, electrical sparking, welding and sources of
radiation, UV light sources, prolonged ambient temperatures above
60ºC and any obstruction to the field of view.
Installation
If fitting to an XP95 Zone Monitor do not fit more than one device
per zone.
If fitting to a conventional control panel, please verify the quantity
that can be fitted per zone with the panel manufacturer.
The field of view of the flame detector is shown in Figure 1, which
also gives information on the size of fire that is detectable at
various distances.
The flame detectors can also be ceiling mounted, positioned above
the anticipated flame source or at the centre of the area to be
protected, perpendicular to the floor below. If the detector cannot
see the whole of the area to be protected, one or more additional
detectors may be required. Refer to Figure 2 to establish the
detector performance. The area of detection is dependent on the
detectors height above the likely source of flame. The detector
has a 90º conical field of view or 45º either side of the viewing
axis centre. The maximum ceiling height is 20 m. If the detector is
perpendicular to the floor and at a height of 10 m then the detector
will view a circular floor area below with a 10 m radius - 20 m
diameter circle.
Figure 1: Field of view - wall mount
–90°
–75°
–60°
–45°
–30°
–15°
0°
15°
30°
45°
60°
75°
90°
0.1m² flame seen
at 25m in straight line
from flame detector
0.4m² flame seen
at 40m in straight line
from flame detector
0.1m² flame not seen
at 25m since it is not
in the field of view of
the flame detector
25m
m
0
4
0
centre line of detector
detection of 0.4m² flame
detection of 0.1m² flame
Figure 2: Field of view - ceiling mount
Vertical Plane
Ceiling
5m
10m
15m
20m
Floor
Plan View
10m Dia.
20m Dia.
30m Dia.
40m Dia.
Height
© Apollo Fire Detectors Limited 2009/TP
Marine Equipment Directive 2014/90/EU
The Series 65 Marine Base Mounted Flame Detector complies
with the essential requirements of the Marine Equipment Directive
2014/90/EU.
PP5071/2017/Issue 1
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