Owner's Manual

The inlet sampling tube length is determined by the width
of the air duct being protected. The inlet tube nearest to
but greater than the duct width should be used (see table).
The inlet tube can then be trimmed at the job site to the
exact width of the duct. The outlet sampling tube for all
ducts, irrespective of width, has a fixed length of approxi-
mately 3 inches (7.5 cm) and is supplied with the duct
housing.
When the use of a remote relay is required, a relay module
DA-3SR for conventional systems or DA-X3SR for MXL or
ICon-1 (IXL) systems is used to replace the existing
terminal strip in the air duct housing wiring compartment.
See installation diagram.
Sampling Tube Selection Table
Air handling equipment shall be shut down by a signal
from the fire detection system control equipment. When
the air duct housing incorporates the optional relay, the
shut down of air handling devices may be accomplished
by a signal directly from the detector.
The air duct housing shall be available with a self-con-
tained power supply so that it can function as a stand-
alone unit if desired. The self-contained stand-alone unit
will power and supervise two satellite units.
The air duct housing shall utilize a plug-in detector head
located in the air sampling chamber. The detector shall be
either ionization or photoelectric. There shall be provisions
to check the detector sensitivity in place under actual air
flow conditions.
The air duct housing shall be mounted directly outside of
the air duct by means of four bolts (supplied). A template
shall be provided for making necessary cut-outs and holes.
Complete instructions shall be supplied with the unit.
The air duct housing shall be a Cerberus Pyrotronics
Model _______ (See listing on back page) and shall be
Underwriters Laboratories, Inc. Listed, specifically for use
in air handling systems.
Note to Architect: When building codes regulate the
location of detectors within ventilating systems, make sure
that the number and locations of detectors is in accor-
dance with the code regulations.
(The “X” Series and the PEC-3 detectors are obsolete
as of 1/1/92. The IL Series are direct replacement for
the ID-60 and “X” Series and the PE-3 for the PEC-3.)
Dimensions
Duct Width Sampling Tube Model No.
9" to 1'9" (21 cm to 51 cm) STA-2
1'9" to 3'3" (51 cm to 97.5 cm) STA-3
3'3" to 6'3" (97.5 cm to 187.5 cm) STA-6
6'3" to 9'9" (187.5 cm to 292.5 cm) STA-10
Greater than 9'9" (292.5 cm) Consult Pyrotronics
International
Maintenance of the detector is easily accomplished by the
removal of the Series 3/X3 duct housing sampling cham-
ber cover. The detector, which plugs into the housing, is
easily removed for cleaning by a trained technician.
All that is necessary for the installation of the air duct detect-
or is the cutting of three small holes for the sampling tube
installation (template included) and the drilling of four holes
for mounting the air duct housing. The unit is then easily
mounted in place and connection made to the existing wires
or terminals if optional accessories are utilized.
Engineer and Architect Specifications
The air duct housing for the fire detection system shall be
a Cerberus Pyrotronics Series 3/X3 air duct housing.
The air duct housing shall incorporate the use of one of the
following detectors.
Series IL Photelectric Model ILP-1
Series IL Ionization Model ILI-1B
Series IL Ionization
(High Altitude 3000-8000 ft.) Model ILI-1BH
Series 3 Ionization Model DI-B3
Series 3 Ionization
(High Altitude 3000-8000 ft.) Model DI-B3H
Series 3 Photoelectric Model PE-3
Series ID-60 Ionization Model ID-60IB
Series ID-60 Ionization
(High Altitude 3000-8000 ft.) Model ID-60IBH
Series ID-60 Photoelectric Model ID-60P
The air duct housing unit shall be designed for detection of
combustion products and/or smoke in air conditioning and
ventilation system ducts in compliance with NFPA Stan-
dard 90A. The assembly shall consist of a housing to
accommodate sampling tubes which extend into and
across the duct of the ventilation system.
While the fans are operating, a continuous cross-sectional
sampling of air from the duct shall flow through the se-
lected ionization or photoelectric detector, after which the
sampled air shall be returned to the duct.
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