F300-28-00
1
I56-1974-006R
Fire•Lite Alarms, Inc., One Fire-Lite Place, Northford, CT 06472, 203-484-7161
Before installing detectors, please thoroughly read the NEMA Guide for Proper Use of Smoke Detectors in Duct Applications, which
provides detailed information on detector spacing, placement, zoning, wiring, and special applications. Copies of this manual are avail-
able from NEMA (National Electrical Manufacturers Association, 2101 L Street NW, Washington, DC 20037). NFPA Standards 72 and
90A should also be referenced for detailed information.
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 D350RPL 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 D350RPL has remote test capability with the RTS451/RTS451KEY
Remote Test Station.
The D350RPL incorporates a cover tamper feature. When the cover is removed for more than 20 minutes, the unit loses communication
at the panel, a trouble is indicated at the panel and the alarm relay switches states thereby shutting down fans, dampers and blowers.
In the case when the sensor is removed or when there is no power to the unit, only a trouble is indicated at the panel (alarm relay
does not work any longer).
CONTENTS OF THE DUCT SMOKE DETECTOR HOUSING KIT
The D350RPL Duct Smoke Detector consists of the following items (See Figure 1.):
Figure 1. Exploded view of duct smoke detector components:
CONDUIT
HOLES
DETECTOR
HOUSING
SAMPLING
TUBE
FILTERS
TERMINAL
STRIP
POWER
BOARD
COVER MOUNTING SCREWS
FOAM GASKETS
SAMPLING
TUBE
DETECTOR
BOARD
DETECTOR
COVER
NOTE:
For ducts over 1
1
⁄
2
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.
Contents Of The Duct Smoke Detector
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 sam-
pling tube
NOTE:
A detector sensor board DOES NOT need
to be ordered separately.
D350RPL INTELLIGENT PHOTOELECTRONIC DUCT SMOKE DETECTOR
WITH EXTENDED AIR SPEED RANGE
INSTALLATION AND MAINTENANCE INSTRUCTIONS
H0129-00
I56-1974-006R
