Intelligent Base Mounted IR
³
Flame Detector,
Installation & Maintenance Guide
General
The Intelligent Base Mounted Triple Infra-red (IR
3
) Flame Detector, part no 55000-024, is
designed for use where open flaming fires may be expected. It is sensitive to low-frequency,
flickering infra-red radiation emitted by flames during combustion. False alarms due to such
factors as flickering sunlight are avoided by a combination of filters and signal processing
techniques. This product is not compatable with the 45681-321 isolator base.
Response to flames
In quiescent condition, i.e., in the absence of a flame, the detector returns an analogue
value of 25. When a flame is visible, the detector signals an alarm by increasing the ana-
logue value returned to 55, usually within 1.5 seconds. The analogue value may continue to
rise until it reaches a pre-set maximum of 64.
In the alarm state the IR
³
Flame Detector latches for 20 seconds, with the analogue value
decreasing to 25 once the flame is no longer detected.
Electrical considerations
The IR
³
Flame Detector is loop powered and needs no external supply. It is connected to a
control panel using either the XP95
®
or Discovery
®
protocol. A remote LED alarm indicator
may be connected to the flame detector.
Sensor window contamination
It is important to keep the sensor window clean and checks should be carried out at
regular intervals–determined locally according to the type and degree of contamination
encountered–to ensure optimal performance of the flame detector. Although flames can
be detected when the window is contaminated, there may be a reduction of sensitivity as
shown in the table overleaf.
It is recommended that the IR³ Flame Detector be disabled when the window is being
cleaned.
© Apollo Fire Detectors Limited 2010,
36 Brookside Road, Havant, Hants, PO9 1JR, UK
Tel +44 (0) 23 9249 2412 Fax +44 (0) 23 9249 2754
www.apollo-fire.co.uk
Technical Data
Supply voltage 17–28V DC
Protocol
5-9V
Quiescent current
2.5mA
Alarm current
4.2mA
Switch-on surge current 9mA (peak) for 85ms
Power-up time 4 seconds
Remote output characteristics
connects to positive through 4.5KΩ
(5mA Maximum)
Fire alarm threshold Analogue value 55 returned after 10Hz flame
flicker for 1.5 seconds
Operating range 25m for 0.1m² n-heptane fire
(EN54-10, Class 1)
Operating temperature –40°C to +70°C (no condensation or icing)
Storage temperature –40°C to +70°C
Relative humidity 0-95% (no condensation)
IP rating
66
Housing material white polycarbonate
V-0 rated to UL94
Dimensions 100mm diameter
40mm height, 48mm in base
Weight 150g detector, 210g in base
Additional Equipment
Portable flame detector test unit
Part no. 29600-226
Adjusted Mounting Bracket
Part no. 29600-458
PP2331/2010/Issue 4
8
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