Design and Construction Handbook - Los Angeles World Airports

Guide Specification
4. The heat detector shall be rated for ceiling installation at a minimum of 70 ft (21.3m)
centers and be suitable for wall mount applications.
D. Standard Detector Bases, SIGA-SB/SIGA-SB4
1. Provide standard detector mounting bases SIGA-SB suitable for mounting on North
American 1gang, 3½” or 4” octagon box and 4” square box. The base shall, contain no
electronics, support all Signature Series detector types and have the following minimum
requirements:
a. Removal of the respective detector shall not affect communications with other
detectors.
b. Terminal connections shall be made on the room side of the base. Bases, which
must be removed to gain access to the terminals, shall not be acceptable.
c. The base shall be capable of supporting one (1) Signature Series SIGA-LED Remote
Alarm LED Indicator. Provide remote LED alarm indicators where shown on the
plans.
E. Relay Detector Bases, SIGA-RB / SIGA-RB4
1. Provide standard detector mounting bases SIGA-RB suitable for mounting on North
American 1gang, 3½” or 4” octagon box and 4” square box. The base shall support all
Signature Series detector types and have the following minimum requirements:
a. Removal of the respective detector shall not affect communications with other
detectors.
b. Terminal connections shall be made on the room side of the base. Bases, which
must be removed to gain access to the terminals, shall not be acceptable.
c. The relay shall be a bi-stable type and selectable for normally open or normally
closed operation.
d. The position of the contact shall be supervised.
e. The relay shall automatically de-energize when a detector is removed.
f. The operation of the relay base shall be controlled by its respective detector
processor. Detectors operating standalone mode shall operate the relay upon
changing to alarm state. Relay bases not controlled by the detector microprocessor
shall not be acceptable.
g. Form "C" Relay contacts shall have a minimum rating of 1 amp @ 30 Vdc and be
listed for pilot duty.
F. Duct Detector, SIGA-SD
1. Provide intelligent addressable photoelectric duct smoke detectors SIGA-SD. The analog
photoelectric detector shall utilize a light scattering type photoelectric smoke sensor to
sense changes in air samples from its surroundings. The integral microprocessor shall
dynamically examine values from the sensor and initiate an alarm based on the analysis
of data. Systems using central intelligence for alarm decisions shall not be acceptable.
The detector shall continually monitor any changes in sensitivity due to the
environmental affects of dirt, smoke, temperature, aging and humidity. The information
shall be stored in the integral processor and transferred to the analog loop controller for
retrieval using a laptop.
FIRE DETECTION AND ALARM
28 31 00 - 21 Fire Alarm