Owner's Manual

Introduction
The Cerberus Pyrotronics air duct detector housings are
designed to be used with Cerberus Pyrotronics Series IL,
ID-60 and Series 3 ionization or photoelectric detectors.
Designed for installation directly to heating, ventilating and
air conditioning duct systems, they comply with National
Fire Protection Association Standard No. 90A. When
equipped with ionization or photoelectric detectors, these
units will signal the presence of hazardous quantities of
products of combustion or smoke being carried through
the duct system. Air duct detectors are not intended to be
substituted for open area detection.
Air duct housings can be equipped with optional relays.
These relays are utilized to operate any supplementary
equipment when smoke or particles of combustion are
detected.
Note:
Most control equipment including System 3 guaran-
tees only one detector per zone is permitted when the
detector operated relay function is critical. The connection
of a remote lamp or a remote relay per detector is allowed,
but not both.
The XL3 control panel assures operation of all detector
operated relays, therefore up to 30 detectors per circuit
having relays for critical functions may be used. For the
MXL control panel, up to 60 detectors per circuit having
relays may be used. The connection of a remote lamp or a
remote relay is allowed for each detector but not both.
Air duct housings (see Ordering Information) are Under-
writers Laboratories, Inc.listed.
Description
The Cerberus Pyrotronics air duct housing is uniquely
designed to use the highly sensitive yet stable Series IL,
ID-60 and Series 3 detectors.
The sensitivity of Series 3 detectors can be checked in
place under actual dynamic air flow conditions using a
Cerberus Pyrotronics sensitivity test module. The sensitivity
of Series IL detectors can be checked in place under
actual dynamic conditions at the XL3 control panel, MXL
control panel or IXL respectively or may be printed by
command on the optional printer.
The detector unit employs a cross-sectional sampling
principle of operation. Inlet sampling tubes are available in
four lengths (see table on reverse side). Outlet sampling
tubes are one common length. A continuous cross-
sectional sample of air moving through the duct is taken.
This averages the effects of laminar flow, stratification or
skin effect phenomena occurring in the duct that could
prevent combustion product or smoke (especially in large
ducts) from reaching a spot type detector.
In addition, the unique design of the Cerberus Pyrotronics
sampling chamber insures uniform sensitivity in air veloci-
ties, ranging from a low of 300 feet per minute to as high
as 4000 feet per minute.
6124
CATALOG NUMBER
Air Duct Housings
ENGINEER AND ARCHITECT SPECIFICATIONS
l Series IL, and Series 3 Ionization or
Photoelectric Detectors
l Optional Relays for Supplementary
Equipment Operation
l Optional Control Module for Self-contained
Operation (Series 3 Detectors Only)
l Alarm LED Visible from Front
l Clear Housing Cover for Quick
Identification of Detector Type
l Listed, ULC Listed, NYMEA, FM,
CSFM and City of Chicago Approved
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