Det-Tronics U5006 Air Duct Smoke Detector - Manual

APPLICATION
The Det-Tronics U5006 Air Duct Smoke Detector is
designed to detect the presence of smoke for the
primary purpose of controlling blowers and dampers in
air conditioning and ventilation systems and is intended
for use in classified areas in hazardous industrial and
commercial locations. The unit mounts directly to heating,
ventilating, and air conditioning ducts and utilizes a cross
sectional sampling tube arrangement that allows large
volume air sampling. The U5006 is intended to serve
as a supplement rather than a substitute for open area
detection.
The air duct smoke detector is intended to be connected
to a control unit and function as part of a fire protection
system. The U5006 is designed for use with a 4-wire
system fire alarm control panel (2 wires for detector
power and 2 wires for detector output).
The detector operates on the forward infrared light
scattering principle, a technology that is based on more
than 30 years of experience in advanced photoelectric
detection systems.
FEATURES
CSA Certified for Class I, Division 2, Groups A, B, C •
& D hazardous locations.
Trouble-free photoelectric operation.
•
Standard 4-wire 24 Vdc operation. •
Designed to meet ANSI/UL 268A smoke obscuration •
limits.
600 to 4000 ft/min airflow range.
•
Rugged design for environmental extremes. •
DESCRIPTION
The U5006 uses air sampling tubes to provide a cross
sectional sampling of air moving through the duct. Inlet
sampling tubes are available in four lengths: one foot,
three feet, six feet, and ten feet. The desired length
must be specified when ordering. See the “Ordering
Information” section for details.
The length of the inlet sampling tube is determined by the
width of the duct to be monitored. The inlet tube should
cover the entire width of the duct, therefore, specify the
shortest sampling tube that is at least the width of the
duct to be protected. It can then be cut to the exact
length at the job site.
Outlet tubes are one common length. Both inlet and
outlet tubes are furnished with each detector.
Detector operation
When smoke enters the detection chamber, the detector
latches into an alarm condition. This results in actuation
of an alarm relay, which is connected to the control panel.
In addition, an LED located on the detector housing is
illuminated to provide a visual indication that a smoke
alarm condition has occurred. An auxiliary set of Form
C alarm relay contacts is also provided for controlling
remote annunciation devices.
To reset the detector, operating power is temporarily
interrupted. This action resets the detector and any remote
alarm devices or other equipment that is connected to it.
It also causes a set of normally closed power supervisory
contacts to open, thus annunciating a trouble condition
at the control unit.
inStrUctionS
Air Duct Smoke Detector
for Classified Areas
U5006
2.2 ©Detector electronics corporation 2009 8/09 95-8456