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, Each Model HI921 unit is UL listed including advanced built-in ISOtechnologyTM - a “True Class-X” SLC operation (use is optional) greatly improving system reliability and circuit integrity while providing advanced addressable fault finding.

Each model 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 combined 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) ─ 17 5 °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 /FV 922 or FC /FV 924 FACPs ) − serves as prevention of

water freezing in pipes for sprinkler systems, meeting NFPA 72