Siemens HI921 Addressable RoR & Fixed Heat Detector c/w. Base

The Intelligent Thermal (Heat) Detector (Model HI921) provides an advanced method of
detection, address programming supervision ─ combined with sophisticated FACP
communication. Model HI921 uses a state-of-the-art thermistor, microprocessor and
advanced signal analysis, providing high reliability and accuracy.
Additionally, Model HI921 is a cost-effective, two-wire / addressable thermal detector that
provides a distinctive, advanced feature: seven (7) field-selectable temperature settings
specially tailored for application-specific detection needs.
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.
Model HI921 can be configured 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