Heat Detector

Intelligent Heat Detector

FireWatcher 521

The Heat Detector FW521 is addressable, intelligent and UL and ULC listed device according to UL 521 and ULC-S530 for Fire Protective Signaling Systems for indoor use with both fixed-temperature alarm and rate-of-rise alarm characteristics.
The heat fire alarm has a Microcontroller Unit (MCU) performing comprehensive self-diagnostic tests, and result analysis


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        The heat detector has a slim design that combines visual appeal with a high standard of reliability.

        It responds quickly and dependably to a broad range of fires. Thanks to its Microcontroller Unit (MCU), Maple Armor heat detector makes a complete comprehensive self-diagnostic test and result analysis.

        The FW521 is intelligent, addressable, and takes one address on the Signaling Line Circuit (SLC) of the fire alarm control panel.

        Ul approved alarm products
        UlC approved alarm products
        FM approved alarm products
        FCC approved alarm products
        • UL521/ULC S530
        • Addressable and intelligent Heat Detector
        • Fixed Temperature and rate-of-rise
        • Comprehensive self diagnostics
        • Slim design – visually appealing
        • Nominal Voltage: 24VDC
        • Voltage Range: 17.6 to 25.5VDC
        • Standby Current: 0.1mA
        • Alarm Current: 1mA
        • Fixed Temperature Rating: 135°F (57.5°C)
        • Rate-of-Rise Detection: 15°F min. (8.3°C min.)
        • Installation Temperature: 32°F to 100°F (0°C to 38°C)
        • The diameter of the heat detector: 4.13 in. (105mm)
        • Height (with base): 1.87 in. (47.5 mm)
        • Weight (with base): 4.3 oz (121 g)
        • Mounting :FW500 Base
        • Mounting Orientation: Ceiling only
        • Spacing: 50 feet (15 m)

        Intelligent addressable heat detectors are vital for life safety, as often the heat from a fire can be detected before smoke buildup happens. This can give the few extra minutes needed to evacuate and save lives. The FW521 offers both fixed temperature and rate-of-rise detection in a single unit.

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