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Model SS4-A/-A2 Multi-Spectrum Digital Electro-Optical Fire Detector
Installation Guide and Operating Manual
MAN0931_V3_1510-001_RevH_06-13
1.1.2
Applications
Applications of the Model SS4-A/-A2 Detectors include warehouses, aircraft hangars, petrochemical
facilities, Silane gas storage, Gas turbines, and Power plants, among others.
1.1.3
Detector Locations
For unobstructed performance, considering Detector locations in application areas, avoid sources, other
than fire, which may cause false alarms, such as operations utilizing welding or gas torch equipment, high
power sources of EMI or RFI, or artificial lighting pointed directly at the Detector. Locations experiencing
strong mechanical or acoustical vibrations should also be avoided. For optimum performance, locate the
Detector(s) as close as possible to the potential fire source, preferably, along the axis of the vision cone.
Install enough Detectors to completely eclipse the fire hazardous area. Assure accessibility for the
Detector lens cleaning, as well as best possible protection and/or cleaning from fog, rain, ice, dust,
hazardous atmospheres, and other adverse elements. If necessary, utilize the Steel Swivel Mount (Model
SM2) or 316 Stainless Steel Swivel Mount (Model SM4) for greater flexibility in mounting locations (See
Figures 4 and 5).
1.2
Stand-Alone Operation
For Stand-Alone operation, the Model SS4-A/-A2 Detector may be connected to a suitably approved
transmitter or control system/panel. The Detector operated in the Stand-Alone mode uses the Fire, Fault,
and Verify (optional) relays to interface to the Fire/Security Panels. For Stand-Alone operation, the
Detector's Fault relay is automatically configured by the on-board microprocessor. The input current of
the Model SS4-A/-A2 Detector is about 15 mA higher in the Stand-Alone mode compared to FS2000
System operation.
NOTE: The Fault relay is not available when the Detector is wired to the FS2000 System.
1.3
FS2000 System Operation
For FS2000 System operation, the Detector Fire and Fault signals are sent digitally to the FS2000 System
Controller using the four wire FS2000 FireBus. The FireBus provides the 24 Volt DC power for the
Detector and RS-485 digital communication (Refer to Fire Sentry document MN0003 entitled "FS2000
FIRE EARLY WARNING SYSTEM - INSTALLATION and OPERATIONS GUIDE"). For special remote
alarm applications, users may also connect directly to the Detector's Fire alarm relay.
NOTE:
When the Model SS4-A/-A2 Detector is connected to the FS2000 System using FireBus
communication, the Controller automatically disables the Detector's Fault relay.
3
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