EMS FireCell Wireless Heat Detector | Choice of A1R (Rate of Rise) or CS (Fixed Temp)

FAQs

Which heat detector model should I choose – A1R or CS?

Select the FCX-175-001 A1R rate of rise detector for normal ambient temperature environments (typically 25°C, maximum 50°C) where rapid fire development detection is required, such as offices, residential areas, circulation spaces, and general commercial buildings. The A1R responds to both rate of temperature rise and fixed temperature (57°C typical), providing early warning of fast-developing fires. Choose the FCX-176-001 CS fixed temperature detector for areas with higher normal ambient temperatures (typically 55°C, maximum 80°C) where rate of rise detection could cause false alarms, such as kitchens, boiler rooms, plant rooms, laundries, and manufacturing facilities with heat-producing processes. The CS responds at a higher fixed temperature (90°C typical), preventing nuisance alarms from normal operational heat while reliably detecting fire conditions.

What wireless bases are compatible with these heat detectors?

Both the FCX-175-001 (A1R) and FCX-176-001 (CS) heat detector heads must be used with one of the following compatible FireCell wireless bases: FCX-170-001 (standard wireless detector base), FCX-170-101 (wireless detector base variant), FCX-191-000 (wireless sounder base), or FCX-191-200 (wireless sounder base variant). The detector heads alone do not provide wireless communication capability or power – they must be mounted on a compatible base that provides the 868 MHz wireless interface, battery power (6 x AA alkaline), and communication with the FireCell control panel. Standard bases provide detection-only functionality, while sounder bases add integrated audible alarm capability at the detection point for enhanced local warning.

Can heat detectors be used instead of smoke detectors?

Heat detectors should not automatically replace smoke detectors – the appropriate detector type depends on the specific application and fire risk assessment. Smoke detectors (like the FCX-177-001 optical) provide earlier fire detection by sensing smoke particles before significant temperature rise occurs, making them essential for sleeping areas, escape routes, and most general areas. Heat detectors are specified for environments where smoke detectors would cause false alarms due to steam, cooking fumes, dust, or other airborne particles, or in areas with very high ceilings where smoke would not reach detectors quickly. Many systems use both detector types strategically – smoke detectors for early warning in critical areas and heat detectors in challenging environments where smoke detection is impractical.

What is the difference between the A1R and CS EN54-5 classifications?

EN54-5 defines different heat detector classes based on their response characteristics and intended applications. Class A1R detectors combine rate of rise sensing (responding to rapid temperature increases of typically 10°C per minute) with fixed temperature response, providing early detection of fast-developing fires while maintaining a backup static response temperature. Class CS detectors are fixed temperature devices that respond when ambient temperature reaches a specific threshold, offering reliable detection in environments with higher normal temperatures or gradual temperature changes. The “A” in A1R indicates a lower response temperature range suitable for normal environments, while “CS” indicates a higher static temperature classification for hotter ambient conditions where lower-temperature detectors would false alarm during normal operations.

How does the FasTest maintenance feature work on heat detectors?

The FasTest maintenance feature enables rapid functional testing of the heat detector heads during routine service visits without requiring specialized test equipment or heat application. Service engineers can quickly verify the detector’s thermal sensing capability, alarm response, LED indication, and communication with the system through the wireless base using simplified test procedures. This streamlined testing process significantly reduces maintenance time compared to traditional heat detector testing methods that often require heat sources or aerosols, particularly valuable in large installations with numerous detectors requiring periodic verification. FasTest ensures the detector meets EN54-5 performance requirements while minimizing system downtime and service costs.