30
SMOKE DETECTORS
Smoke detectors are available as factory--installed options
on 580J***D models. Smoke detectors may be specified
for Supply Air only or for Return Air without or with
economizer or in combination of Supply Air and Return
Air. Return Air smoke detectors are arranged for vertical
return configurations only. All components necessary for
operation are factory--provided and mounted. The unit is
factory--configured
for immediate
smoke
detector
shutdown operation; additional wiring or modifications to
unit terminal board may be necessary to complete the unit
and smoke detector configuration to meet project
requirements.
System
The smoke detector system consists of a four--wire
controller and one or two sensors. Its primary function is
to shut down the rooftop unit in order to prevent smoke
from circulating throughout the building. It is not to be
used as a life saving device.
Controller
The controller (see Fig. 45) includes a controller housing,
a printed circuit board, and a clear plastic cover. The
controller can be connected to one or two compatible duct
smoke sensors. The clear plastic cover is secured to the
housing with a single captive screw for easy access to the
wiring terminals. The controller has three LEDs (for
Power, Trouble and Alarm) and a manual test/reset button
(on the cover face).
Sensor
The sensor (see Fig. 46) includes a plastic housing, a
printed circuit board, a clear plastic cover, a sampling
tube inlet and an exhaust tube. The sampling tube (when
used) and exhaust tube are attached during installation.
The sampling tube is shipped in the blower section and is
wire tied to the blower housing. See Fig. 47. The clear
plastic cover permits visual inspections without having to
disassemble the sensor. The cover attaches to the sensor
housing using four captive screws and forms an airtight
chamber around the sensing electronics. Each sensor
includes a harness with an RJ45 terminal for connecting to
the controller. Each sensor has four LEDs (for Power,
Trouble, Alarm and Dirty) and a manual test/reset button
(on the left--side of the housing).
Air is introduced to the duct smoke detector sensor’s
sensing chamber through a sampling tube that extends into
the HVAC duct and is directed back into the ventilation
system through a (shorter) exhaust tube. The difference in
air pressure between the two tubes pulls the sampled air
through the sensing chamber. When a sufficient amount of
smoke is detected in the sensing chamber, the sensor
signals an alarm state and the controller automatically
takes the appropriate action to shut down fans and
blowers, change over air handling systems, notify the fire
alarm control panel, etc.
Duct smoke sensor
controller
Fastener
(2X)
Controller cover
Conduit nuts
(supplied by installer)
Conduit support plate
Cover gasket
(ordering option)
Conduit couplings
(supplied by installer)
Terminal block cover
Controller housing
and electronics
Alarm
Power
Test/reset
switch
Trouble
C08208
Fig. 45 -- Controller Assembly
Duct smoke sensor
Exhaust tube
Intake
gasket
Cover gasket
(ordering option)
TSD-CO2
(ordering option)
Sensor housing
and electronics
Sensor cover
Magnetic
test/reset
switch
Alarm
Trouble
Power
Dirty
C09070
Fig. 46 -- Smoke Detector Sensor
580J
***D
Summary of Contents for 580J***D series
Page 3: ...3 C09128 Fig 1 Unit Dimensional Drawing 17 and 20 Size Units 580J D ...
Page 4: ...4 C09129 Fig 1 Unit Dimensional Drawing 17 and 20 Size Units cont 580J D ...
Page 5: ...5 C09130 Fig 2 Unit Dimensional Drawing 24 and 28 Size Units 580J D ...
Page 9: ...9 C09052 Fig 5 Roof Curb Details 17 and 20 Size Units 580J D ...
Page 10: ...10 C09100 Fig 6 Roof Curb Details 24 and 28 Size Units 580J D ...
Page 22: ...22 C09115 Fig 29 RTU MP System Control Wiring Diagram 580J D ...
