The Siemens HI921 Intelligent Heat Detector provides an advanced method of detection, address programming supervision─combined with sophisticated FACP communication. Also, the Siemens HI921 uses a state-of-the-art thermistor, microprocessor, and advanced signal analysis, providing high reliability and accuracy. Additionally, Each Model HI921 unit is UL list including advance built-in ISOtechnology™ – a “True Class-X” SLC operation greatly improving system reliability and circuit integrity while providing advanced addressable fault finding.
In general, each Siemens HI921 is a cost-effective, intelligent, addressable thermal detector that provides distinctive, advanced features: seven (7) field-selectable temperature settings specially tailored for application-specific detection needs to be combine with Class-X SLC operation built-in avoiding additional installation and material cost. The temperature-range settings for each Model HI921 detector is between 135°F (57°C) ─ 174°F (79°C) with fixed and rate-of-rise programmability. This variance provides the customer with maximum flexibility to program the temperature settings to suit multiple application needs and changing environmental conditions.
Besides, model HI921 can be configure to provide a low-temperature warning signal at 40°F (4.4°C). This feature − along with a compatible FACP (Cerberus PRO Modular | FireFinder XLS/V or with Cerberus PRO FC/FV922 or FC/FV924 FACPs) − serves as prevention of water freezing in pipes for sprinkler systems, meeting NFPA 72 Model HI921 also utilizes a modern; accurate and shock-resistant thermistor to sense significant changes in temperature. Furthermore, each Model HI921 detector has seven (7) pre-programmed parameter sets that can be select by the Siemens FACP.
Features / Specifications
- Provides a low-temperature warning of 40°F (4.4°C)
- Field programmable as rate-of-rise or fixed temperature
- Tri-color detector-status light-emitting diode (LED) with 360 ° view
- Utilizes advanced, microprocessor-based signal processing
- Functions with Model DB11–series mounting bases
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