CERBERUS PYROTRONICS ASD-3 AnaLASER Air Sampling Detection Owner’s Manual
- June 9, 2024
- CERBERUS PYROTRONICS
Table of Contents
AnaLASER™
Air Sampling Detection
ENGINEER AND ARCHITECT SPECIFICATIONS
ASD-3, ASD-6, ASD-12 AnaLASER™ Detectors
- Air Sampling/Aspiration Smoke Detection
- Highly Sensitive Detection—1000 Times More than Spot Type Detectors
- Laser Light Scattering Technology
- Applicable to High Air Flow Environments
- Minimal Maintenance Required
- Engineered Air Sampling Pipe Network
- Meets NFPA 72 Standard for Smoke Detectors
- Listed, FM Approved (ASD-3, ASD-6), C.U.L. (Canada)
Introduction
The AnaLASER™ detection system is a high sensitivity, air sampling system.
Through the laser based light source fire can be detected in its incipient
stage. Smoke particles are drawn by a fan into an air sampling pipe network to
the detector. This allows detection over a large area, in confined spaces or
from air return ducts. The AnaLASER™
system is FM Approved and meets NFPA 72 requirements for smoke detectors.
Typical Applications
The AnaLASER™ detection system can be used in many applications where
conventional spot -type smoke detectors are used, but are stretched beyond
their reasonable capabilities. The Ana-LASER™ system can be used in envi-
ronments with high volume air movements such as clean rooms, or with
unpredictable airflow patterns such as atriums and hangars. It can provide
high sensitivity detection over a large area. Applications which require the
detector to be obscure, as in prisons and museums, are also well served by the
AnaLASER™ system. The following list in- cludes some of the many applications
for the AnaLASER™ detection system.
Aircraft hangars, anechoic chambers, art galleries, atriums, boiler rooms,
cable tunnels, cathedrals, clean rooms, computer rooms, concert halls,
container vessels, cruise ships,
dormitories, equipment racks, escalators, historical buildings, hospitals,
hotels, laboratories, libraries, machine rooms, motels, museums, nuclear
reactors, office buildings, particle accelerators, passenger rail cars,
prisons, radio transmitters, recording studios, satellite construction
facilities, schools, sports complexes, stadiums, switchboards, telephone
exchanges, theaters, underground railway stations, warehouses.
Description
The AnaLASER™ system consists of four components:
- Air Sampling Network,
- AnaLASER™ Detector Assembly,
- AnaLASER™ Control Unit (see Catalog No.1161)
- AnaLASER™ Power Supply (see Catalog No. 1161).
Air Sampling Network
The air sampling network is constructed of 1 inch,3/4 inch and 1/2 inch smooth
bore pipe which is distributed throughout the protected area. A sampling
network may employ only one length of pipe or up to 20 pipes which all return
to the detector. Air sampling holes are strategically placed along the pipes
according to code, per NFPA 72
guidelines or as required for maximum protection.
The AnaLASER™ air sampling network
may be placed in locations with airflow velocity as high as 20 feet/second.
The area protected by a single detector may be as large as
20,000 square feet, each sampling hole may protect up to 900 square feet.
Location and coverage of each sampling hole is governed by NFPA 72
requirements for spot type
smoke detectors.
The “SNIFF” computerized design program allows the installer to distribute the
piping throughout the hazard with minimal constraints. The program balances
the sampling network by sizing the holes and pipe diameters to insure equal
air intake from each hole with minimum air transport time to the detector.
Consult an authorized Cerberus
Pyrotronics Sales Outlet for assistance with the proper application of the
AnaLASER™ detection system.
The AnaLASER™ Detector Assembly
The AnaLASER™ detector assembly consists of a fan box with an AnaLASER™
detector. The fan box is an airtight enclosure which houses a high efficiency,
24 volt DC
centrifugal fan. Centrifugal fans are superior to axial fans and produce the
greater suction pressure necessary in an air sampling system. The fan draws
air from the air sampling network through the AnaLASER™ detector. The air
passes without filtration straight through the detection chamber.
The detector’s patented optical system focuses a 100 micron diameter laser
beam across the detector chamber, and a single photon detection device
collects scattered light from the individual particles of smoke as they
traverse the laser beam.
Smoke concentration is determined by counting these discrete events over a
period of time. These individual particles produce an analog signal which is
transmitted to the
control panel.
A large particle size discriminator prevents random large particles, present
in unfiltered air, from generating an alarm condition. Dust particles which
manage to defeat the large particle rejection circuitry only count as a single
particle, despite their size, and contribute little to the detector’s signal
level. Airflow is monitored with a bead type thermistor which is cooled by the
air passing through the detection chamber and compared to a reference
thermistor mounted outside the chamber. Should the airflow vary or stop, a
comparator circuit transmits a signal to the control panel.
The intensity of the laser is monitored and controlled with a closed-loop
control circuit that maintains the stability and accuracy of the AnaLASER™
detector over its life. Compensation is provided by changes in laser intensity
due to temperature, aging of components, or contaminant buildup. This circuit
also monitors or supervises the operation of critical components in the
system: laser, photo diode, and optical assembly. Failure or out of tolerance
will result in a detector fail signal being transmitted to the control panel.
Three detectors with different sensitivity dynamic ranges are available.
Sensitivity selection depends on the minimum level of smoke to be detected
plus the ambient level of air pollution. It is necessary to conduct an on-site
test to determine which sensitivity range is appropriate for the protection of
given hazard. This test should be conducted
before the installation is commissioned.
The AnaLASER™ Control Unit and Power Supply
Please see Catalog Number 1161.
Engineerand Architect Specifications
The Air Sampling Smoke Detection System shall be Cerberus Pyrotronics
AnaLASER”A. The detector shall be housed in an airtight enclosure with
straight- through airflow design. The air shall pass through the detector
without ob-struction or filter which requires maintenance and which may
inhibit the system s ability to detect smoke. An optional exhaust to a 3/4
inch pipe, shall be available to return the sample air back to the area or
duct being protected. The detector shall use a laser as the light source for
detect-ing particles of combustion. The laser light source life ex-pectancy
shall be a minimum of 10 years or greater and the output energy shall remain
constant over that period. The detector output shall be controlled with a
closed- loop control circuit to maintain the accuracy of the detector. The
light source, the photo diode, and all critical components shall be supervised
within the detector. Upon failure or sig-nificant variation, detector failure
shall be transmitted to the AnaLASERTM Control Panel. The detector shall also
super-vise the fan and upon failure or significant variation in air-flow, the
detector shall transmit a fault condition signal to the AnaLASERTM Control
Panel. The fan shall be a high-efficiency,ballbearing,electric commuted
centrifugal-type design for long life and shall create a minimum static
pressure of greater than 0.05 inches of water at all sampling points. The air
sampling piping network shall be a closed-end sys-tem, constructed of 1
inch,3/4 inch and V, inch pipe. The pipe ends shall be capped within 6 inches
of the last sampling point. The pipe system shall be supported as required by
local codes. The air sampling system shall be engineered for a maximum
transport time of 120 seconds and have equal sensitivity throughout the entire
system.
Before approval to proceed, install or invoice this contract, an engineering
report must be submitted with the following design information:
- Flow rate through detector in cfm
- Maximum calculated air transport time from the most distant hole
- Pipe diameter of each segment
- Sample hole diameters and location
- Calculated suction pressure and location of each sampling hole
- External air flow allowance in feet per second
- Isometric drawing describing the protected area with pipe segments number, air sampling holes number, and length of all pipe segments and distances between holes.
Upon completion of installation, the above-mentioned design information shall
be verified and empirical values recorded for periodic maintenance to the
system.
Suction pressure shall be measured with a magnehelic manometer and air
velocities with an anemometer.
The AnaLASER™ Display Control Panel shall be modular in construction and
consist of one or more Ana-LASER™ Display Control Cards.
The AnaLASER™ display control card shall monitor one AnaLASER™ detection zone
and indicate as a minimum the following information.
- Smoke intensity in 10% increments by means of an illuminating-type bar graph display.
- Three programmable alarm set points with red indicators labeled: Alarm, Pre-Alarm 2, Pre-Alarm 1.
Each alarm level shall have a programmable 0 to 60 second delay and a form C
contact output.
The following system conditions shall be annunciated and shall have a common
form C contact output:
| System Operation Normal: | steady green light |
|---|---|
| Power Supply Trouble: | flashing yellow |
| Detector Fail: | flashing yellow light |
| Air Flow Fail: | flashing yellow light |
| CPU Trouble: | flashing yellow light |
The AnaLASER™ Control Card shall store a history of smoke levels and events.
This information shall be accessible through a computer terminal. Obscuration
level storage
rates shall be programmable from 2 seconds to 60 seconds. The storage capacity
shall be at least 40,000 samples, and downloading shall be possible at
increments of 1 to 40,000 from the most recent data stored.
Each display control card unit shall have a 0 to 5 volt analog output for
connection to a strip chart recorder.
Ordering Information
AnaLASER Model No.| Detector Sensitivity| AnaLASERTM detection systems can be
assembled from the following items:
---|---|---
ASD 3
ASD-6
ASD-12| .003 to .03%/ft.
.006 to .06%/ft.
.012 to .12%/ft.| Item| Models| Catalog No.
Detectors| ASD-3. 6 & 12| 1160
Control Units| ACU-1. 2, 3 & 4| 1161
Power Supplies| APS-2| 1161
Control Cards| ACC| 1162
- For (Canada) ULC labeled models, add “-C” to the model number.
Mounting Dimensions
Cerberus Pyrotronics
8 Ridgedale Avenue
Cedar Knolls, NJ 07927
Tel: 201-267-1300
FAX: 201-397-7008
Website: www.cerbpyro.com
6/9710M
CPY-IG
Printed in U.S.A.
Cerberus Pyrotronics
50 East Pearce Street
Richmond Hill, Ontario
L4B, 1B7 CN
Tel: 905-764-8384
FAX: 905-731-9182
February 1996
Supersedes sheet dated 4/95
firealarmresources.com
References
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