LST Smoke Alarm 2251CTLE User Manual

Multi-criteria Detector  
2251CTLE – COPTIR  
• ADM loop technology with  
System Sensor/200 protocol  
• Combines optical smoke sensor, heat  
detector, infrared sensor and carbon  
monoxide sensor  
• Highest false alarm immunity  
• Several sensitivity levels and thermal-  
only mode selectable  
• Constant response sensitivity  
Description  
The Multi-criteria Detector 2251CTLE incorporates four alarms, on the other hand fires are recognised quickly  
separate detection units, allowing to determine the four and safely.  
essential characteristics of fire:  
C – carbon monoxide  
The multi-criteria detector can operate in difficult fields  
of application, for instance  
OP – optically visible smoke  
T – temperature  
IR – infrared radiation  
The typical patterns of fire are recognised by means  
of intelligent analysis of the measured values of all four  
detection units. That way on the one hand the detector  
• workshops – e.g., welding shops, paint shops  
• hotel rooms with steam formation in the bathroom  
• smoking areas in bars or restaurants  
• discotheques with fog generators  
• garages or loading ramps  
shows an especially high insensitiveness to unwanted and is therefore suitable for virtually universal use.  
The optical measurement chamber uses the  
scattered light principle to detect visible smoke  
particles. The thermal unit responds to tempera-  
ture changes within defined time intervals (rate-  
of-rise principle according to class A1R) up to a  
maximum temperature of 58°C.  
Smouldering fires which spread out slowly can  
also be detected early and safely by using the  
durable carbon monoxide sensor. The infrared  
sensor responds to the flickering of flames and  
supports the detection of fires with low smoke  
development (e.g., alcoholic fires).  
The two LEDs with 360° visibility indicate the  
activated condition of the detector.  
0832–CPD–0518  
Building Safety. Building Security.  
A
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