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�DWARDS <br />LIFE SAFETY �- INCIDENT MANAGEMENT <br />Intelligent Heat <br />Detectors <br />SIGA-HRD, SIGA-HFD <br />Overview <br />The Signature Series smoke detectors bring advanced sensing <br />technology to a practical design that increases efficiency, saves <br />installation time, cuts costs, and extends property protection <br />capabilities. Continuous self -diagnostics ensures reliability over <br />the long -haul, while the latest thermister technology makes these <br />detectors ideal wherever dependable heat detection is required. <br />The SIGA-HRD is an intelligent fixed temperature/rate-of-rise fire <br />detector. It monitors the temperature of the surrounding air and <br />analyzes the data from the sensor to determine whether to initiate <br />an alarm. The rate -of -rise heat function quickly detects a fast, <br />flaming fire. The fixed -temperature heat function detects fire when <br />the air temperature near the detector exceeds the alarm point. <br />The SIGA-HFD is an intelligent fixed -temperature heat detec- <br />tor that contains a fixed -temperature heat sensor rated at 135 °F <br />(57.2 °C). It does not have a rate -of -rise function. The heat sensor <br />monitors the temperature of the air in its surroundings and the <br />detector analyzes the data to determine when the air temperature <br />near the detector exceeds the device's alarm point. <br />EDWARDS° Catalog ► Intelligent Initiating Devices <br />S853 <br />Standard Features <br />Note: Some features described here may not be supported by <br />all control systems. Check your control panels Installation and <br />Operation Guide for details. <br />• Next Generation Heat Sensing Technology <br />• 135 °F (57 °C) fixed temperature alarm point (HRD and HFD) <br />• 15 °F (9 °C) per minute rate -of -rise alarm point (HRD) <br />• Uses existing wiring <br />• Automatic device mapping <br />• Sensor Markings Provide Easy Testing Identification <br />• Up To 250 Total Signature Devices Per Loop <br />• Non-volatile memory <br />• Electronic addressing <br />• Bicolor (green/red) status LED <br />• Standard, relay, fault isolator, and audible mounting bases <br />• 50 foot (15.2 meter) spacing <br />Page 1 of 4 <br />DATA SHEET E85001-0647 <br />Not to be used for installation purposes. Issue 2.2 <br />