Swastik Fire Protection

Siemens

Product Overview
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 135F (57C)
175F (79C) 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 40F
(4.4C). 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
Operation
Model HI921 also utilizes a modern, accurate and shock-resistant thermistor to sense
significant changes in temperature.
Each Model HI921 detector has seven (7) pre-programmed parameter sets that can be
selected by the Siemens FACP.

SPECIFICATIONS
Operating Voltage Range: 15 to 32 VDC
Operating Current @ 24 VDC: 200 uA (one communication every 5 seconds with green LED blink on communication)
Maximum Alarm Current: 2 mA @ 24 VDC (one communication every 5 seconds with red LED solid on)
Maximum Current: 4.5 mA @ 24 VDC (one communication every 5 seconds with amber LED solid on)
Operating Humidity Range: 10% to 93% Relative Humidity, Non-condensing
Operating Temperature Range: 32F to 100F (0C to 38C)
Air Velocity: 0 to 4000 ft./min. (0 to 1219.2 m/min.)
Height: 2.0˝ (51 mm) installed in B300-6 Base
Diameter: 6.2˝ (156 mm) installed in B300-6 Base; 4.1˝ (104 mm) installed in B501 Base
Weight: 3.4 oz. (95 g)
Isolator Load Rating: 0.0063*