so be referenced for detailed informa-
tion.
NOTICE: This manual shall be left with the owner/user of this equipment.
IMPORTANT: This detector must be tested and maintained regularly following NFPA 72 requirements. The detector should be cleaned at least once
a year.
GENERAL DESCRIPTION
An HVAC system supplies conditioned air to virtually every area of a building. Smoke introduced into this air duct system is distributed to the entire
building. Smoke detectors designed for use in air duct systems are used to sense the presence of smoke in the duct.
The D350PL air duct smoke detector is a photoelectric detector. This smoke detection method combines with an efficient housing design that samples
air passing through a duct and allows detection of a developing hazardous condition. When sufficient smoke is sensed, an alarm signal is initiated at
the fire control panel monitoring the detector, and appropriate action can be taken to shut off fans, blowers and change over air handling systems, etc.
This can prevent the distribution or it can isolate toxic smoke and fire gases throughout the areas served by the duct system.
Two LEDs on each detector may illuminate, if programmed by the system control panel, to provide a local alarm indication. There is also a remote
alarm output for use with auxiliary devices. The D350PL has remote test capability with the RTS451/RTS451KEY Remote Test Station.
CONTENTS OF THE DUCT SMOKE DETECTOR HOUSING KIT
The D350PL Duct Smoke Detector consists of the following items: (See Figure 1.)
D350PL INTELLIGENT PHOTOELECTRONIC DUCT SMOKE DETECTOR
WITH EXTENDED AIR SPEED RANGE
INSTALLATION AND MAINTENANCE INSTRUCTIONS
Figure 1: Exploded View Of Duct Smoke Detector Components
NOTE: For ducts over 1
1 2
(0.46m) feet, longer sampling tubes must be ordered to complete the installation. They must be the correct length for the
width of the duct where they will be installed. See Table 1 on page 3 to determine the sampling tube required for different duct widths.
1. Complete duct smoke detector assembly with
sensor
2. Two #10 x 1
1 4
sheet metal mounting screws
3. Two sampling tube filters
4. One test magnet
5. Drilling template
6. Two foam gaskets
7. Four #6-self tapping mounting screws for the
sampling tube and optional exhaust tube
extension
8. One sampling tube end cap
9. One plastic sampling tube
10. One #8 self-tapping screw for plastic sampling
tube
NOTE: A detector sensor board DOES
NOT need to be ordered separately.
Contents Of The Duct
Smoke Detector
FOAM
GASKETS
PLASTIC
SAMPLING TUBE
SAMPLING TUBE
FILTERS
PLASTIC SAMPLING TUBE
SELF-TAPPING SCREW
DETECTOR
COVER
DETECTOR BOARD
CONDUIT HOLES
DETECTOR
HOUSING
TERMINAL STRIP
POWER BOARD
COVER MOUNTING
SCREWS
[10] Board Replacement
[10.1] Sensor Board Replacement
1. Remove the two sensor board mounting screws.
2. Pull gently on the board to remove it.
3. To replace the board, align the board mounting features, holes, and the interconnect terminals. Push the board

into place.
4. Secure board with the two mounting screws.
[10.2] Power Board Replacement
1. Disconnect wiring from the terminal block.
2. Remove the two power board mounting screws.
3. Pull gently on the board to remove it.
4. To replace the board, align the board mounting features, holes, and the interconnect terminals. Push the board

into place.
5. Secure board with the two mounting screws.
6. Re-connect wiring to terminal block.
[11] Model D350PL Air Duct Smoke Detector Specifications
Operating Voltage Range
15 to 32 VDC
Standby Current
300 µA @ 24 VDC (one communication every 5 seconds with LED blink enabled)
Operating Temperature Range
32° to 131°F (0° to 55°C)
Storage Temperature Range
-22° to 158°F (-30° to 70°C)
Humidity Range
10% to 93% (non-condensing)
Air Velocity
100 to 4000 ft/min (0.5 to 20.32 m/sec)
Dimensions
14
3 8
L x 5
1 2
W x 2
3 4
D (37 cm L x 14 cm W x 7 cm D)
Programming Specifications/Requirements for Intelligent System Control Panels
There are a limited number of devices that can have their LEDs programmed to illuminate. The actual number of devices is
determined by the control panel and its ability to supply LED current. Refer to the Control Panel Installation Manual for details.

Accessories





Part No.

Remote LED





RA400Z

Magnetic Remote Test




RTS451

Key-Activated Remote Test



RTS451KEY

Replacement Filters



F36-09-11

Replacement Test Magnet




M02-04-00

Replacement Photo Insect Screen



S08-39-01

Replacement End Cap for Plastic Sampling Tube

P48-61-00

Replacement End Cap for Metal Sampling Tubes

P48-21-00

Replacement Photoelectric Sensor Board


A5053FL

Replacement Power Board (w/o relay)


A5067
F300-27-00
8
I56-1975-003R
© 2004 Fire Lite Alarms
FCC Statement
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this
device must accept any interference received, including interference that may cause undesired operation.
Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and,
if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference
will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:


Reorient or relocate the receiving antenna.


Increase the separation between the equipment and receiver.


Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.


Consult the dealer or an experienced radio/TV technician for help.
To keep your equipment in excellent working order, ongoing maintenance is required per the manufacturers recommendations and UL and NFPA standards. At a minimum,
the requirements of Chapter 7 of NFPA 72, the National Fire Alarm Code, shall be followed. A preventative maintenance agreement should be arranged through the local
manufacturers representative. Though smoke detectors are designed for long life, they may fail at any time. Any smoke detector, fire alarm equipment, or any component
of that system which fails shall be repaired or replaced as soon as possible.
Please refer to insert for the Limitations of Fire Alarm Systems
H0100-00
I56-
1975-003R F300-27-00
2
I56-1975-003R
WARNING
LIMITATIONS OF DUCT DETECTORS
WARNING
The National Fire Protection Association has established that DUCT DETECTORS MUST NOT BE USED AS A SUBSTITUTE FOR OPEN AREA
DETECTOR PROTECTION as a means of providing life safety. Nor are they a substitute for early warning in a buildings regular fire detection sys-
tem.
It is strongly recommended that the user read NFPA Standards 90A, 72, and 101.
WARNING
This device will not operate without electrical power. Fire situations may cause an interruption of power. The system safeguards should be discussed
with your local fire protection specialist.
WARNING
This device will not sense smoke unless the ventilation system is operating.
WARNING
In order to function properly, this detector must be installed according to the instructions. Do not exceed the electrical or ambient specifications or the
detector will not function properly. This detector must be protected from the elements.
INSTALLATION SEQUENCE
Step 1.
Verify duct air flow direction and velocity .....................................................................................................................................................2
Step 2.
Drill the mounting holes ...............................................................................................................................................................................2
Step 2.1
Install the sampling tube for ducts less than 1
1 2

feet (0.46m) wide .............................................................................................................2
Step 3.
Secure the detector housing to the duct ......................................................................................................................................................3
Step 4.
Install the sampling tube for ducts greater than 1
1 2

feet (0.46m) wide .......................................................................................................3
Step 4.1
Installation for ducts greater than 1
1 2

feet (0.46m) but less than 8 feet (2.4m) wide ................................................................................3
Step 4.2
Installation for ducts more than 8

feet (2.4m) wide ....................................................................................................................................4
Step 5.
Install the filters ............................................................................................................................................................................................4
Step 6.
Field wiring ...................................................................................................................................................................................................4
Step 7.
Perform detector check ............................................................................