Fire-Lite D350RP Instruction Manual

F300-11-00 8 I56-0047-005R
[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.
[12] Model D350RP Air Duct Smoke Detector Specifications
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 500 to 4000 ft/min (2.54 to 20.32 m/sec)
Dimensions 143⁄8″ L x 51⁄2″ W x 23⁄4″ 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.
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 interfer-
ence 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 manufacturer’s 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
manufacturer’s 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.
Current Requirements (using no accessories)
Power supply voltage: 20-30 VDC 24 VAC, 50-60 Hz 120 VAC, 50-60Hz 220/240 VAC, 50-60Hz
Max. standby current: 26 mA 65 mA RMS 44 mA RMS 25 mA RMS
Max. alarm current: 87 mA 182 mA RMS 52 mA RMS 30 mA RMS
Alarm resonse time: 3 to 10 Sec. 3 to 10 Sec. 3 to 10 Sec. 3 to 10 Sec.
Power up time: 2 Sec. 2 Sec. 2 Sec. 2 Sec.
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
Accessories Part No.
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/relay) A5060
Accessory Current Loads at 24 VDC
Device Standby Alarm
PA400 0 mA 15 mA Max.
RA400Z 0 mA 12 mA Max.
RTS451/RTS451KEY 0 mA 10 mA Max.
Contact Ratings
Alarm auxiliary contacts* (DPDT) 10 A @ 30 VDC
10 A @ 277 VAC (.75 power factor)
240 VA @ 249 VAC (0.4 power factor)
1/8 HP @ 120 VAC
1/4 HP @ 240 VAC
Supervisory contact (SPST) 2.0 A @ 30 VDC (resistive)
*Minimum switching current for auxiliary contact must be 100 mA DC minimum @ 5 VDC.
F300-11-00 1 I56-0047-005R
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 available 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 D350RP 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 indica-
tion. There is also a remote alarm output for use with auxiliary devices. The D350RP has remote test capability with the
RTS451/RTS451KEY Remote Test Station.
The D350RP 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).
Figure 1. Exploded view of duct smoke detector components:
CONTENTS OF THE DUCT SMOKE DETECTOR HOUSING KIT
The D350RP Duct Smoke Detector consists of the following items
(See Figure 1.):
D350RP INTELLIGENT PHOTOELECTRONIC DUCT SMOKE DETECTOR
INSTALLATION AND MAINTENANCE INSTRUCTIONS
NOTE: For ducts over 11⁄2 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 11/4″ sheet metal 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.



















H0106-00
Please refer to insert for the Limitations of Fire Alarm Systems

F300-11-00 7 I56-0047-005R
[9.2.2] Alarm Tests
[9.2.2.1] M02-04-00 Magnet Test
1. Place the painted surface of the magnet onto the TEST locator
on the bottom of the detector housing (Figure 13).
2. Verify system control panel alarm status and control panel execution of
all intended auxiliary functions (i.e. fan shutdown, damper control, etc.)
3. The detector is self-restoring when the magnet is removed. Verify that
the system control panel has reset; the panel may have to be reset.
[9.2.2.2] RTS451/RTS451KEY Remote Station Test
The RTS451/RTS451KEY Remote Test Station facilitates test of the alarm
capability of the duct smoke detector. These accessories provide the
stimulus to initiate an alarm condition at the detector. The detector is
self-restoring when the accessory test stimulus is removed. Verify that
the system control panel has reset; the panel may have to be reset.
[9.2.3] Sensitivity Tests
Notify the proper authorities that the smoke detector system is undergoing
maintenance, and that the system will temporarily be out of service. Disable
the device or system undergoing maintenance to prevent unwanted alarms
and possible dispatch of the fire department.
[9.3] Maintenance of Duct Smoke Detectors
[9.3.1] Air Filters
1. Turn off power to the system.
2. Remove and inspect sampling tube filters.
3. If filters are heavily coated with dirt, replace them with new filters (p/n F36-09-11). If they are not heavily coated, use
a vacuum cleaner or compressed air nozzle to remove dust, then reinstall the filters.
[9.3.2] Photo Detector Boards
1. Remove the screen by gently grasping on each side and pulling straight off.
2. Lift the photo chamber in the same fashion. Vacuum the screen and cover. Use clean, compressed air to loosen and
blow out any remaining debris. Replacement screens (p/n S08-39-01) are available.
3. Vacuum photo chamber, then use clean compressed air to blow area clean.
4. Replace the chamber by pressing it onto the base. Press the screen into place. It should fit tightly on the chamber.
[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.
Figure 13. Testing detector alarm:
57PA400
5 = Alarm Signal
7 = Aux. Power (–)
Figure 11. Detector with optional PA400 Figure 12. Insulator card for D350RP.
F300-11-00 2 I56-0047-005R
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 building’s regular fire detection system.
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 11⁄2 feet wide .......................................................................... 2
Step 3. Secure the detector housing to the duct..................................................................................................... 3
Step 4. Install the sampling tube for ducts greater than 11⁄2 feet wide .................................................................... 3
Step 4.1 Installation for ducts greater than 11⁄2 feet but less than 8 feet wide .......................................................... 3
Step 4.2 Installation for ducts more than 8 feet wide ............................................................................................. 4
Step 5. Install the filters ....................................................................................................................................... 4
Step 6. Field wiring.............................................................................................................................................. 4
Step 7. Perform detector check ............................................................................................................................. 5
Step 8. Install the cover ....................................................................................................................................... 5
Step 9. Detector Maintenance and Test Procedures ................................................................................................ 5
[1] Verify Duct Air Flow Direction And Velocity
The D350RP duct smoke detector is designed to be used in air handling systems having air velocities of 500 to 4000
feet per minute. Be sure to check engineering specifications to ensure that the air velocity in the duct falls within these
parameters. If necessary, use a velocity meter to check the air velocity in the duct. See Air Flow Test, section 9.1.
[2] Drill The Mounting Holes
Remove the paper backing from the mounting template supplied. Affix the template to the duct at the desired mounting
location. Make sure the template lies flat and smooth on the duct. Center punch holes A and B. Drill the holes as indi-
cated on the template.
[2.1] Sampling Tube Installation for Ducts Less Than 11⁄2 Feet Wide (see Figure 2)
1. Remove the front cover.
2. Slide the plastic sampling tube into the housing bushing.
3. Align the holes in the bushing with the holes in the sampling
tube. Make sure there are 6 exposed holes on the plastic
sampling tube. Secure with the #8 self-tapping screw into the
bottom of the permanent tube (shown in Fig. 2).
NOTE: The sampling tube end cap is critical to the proper operation
of the duct smoke detectors. The end cap is needed to create
the proper air flow to the sensor of the duct smoke detector.
NOTE: For ducts greater than 11⁄2 feet in width, refer to sections [4], [4.1] and [4.2].
Figure 2. Plastic sampling tube
connected to duct smoke detector:

[9.1.2] Filter Replacement
The filters do not substantially affect smoke performance even when up to 90% of the filter is clogged. Quarterly visual
inspection usually suffices to determine whether the filters should be replaced because only a high percentage of con-
tamination affects performance. If further testing is required, compare differential pressure readings with and without
the filters installed using a manometer. If the difference exceeds 10%, replace the filters. In no case should the pressure
differential fall below 0.03 inches of water.
[9.2] Standby, Alarm, And Sensitivity Tests
[9.2.1] Standby And Trouble
Standby — If programmed by the system control panel, look for the presence of the flashing LEDs through the transpar-
ent housing cover. The LED will flash with each communication.
Trouble — If programmed by the system control panel and if the detector LEDs do not flash, then the detector lacks
power (check wiring, panel programming, or power supply), the detector board is missing (replace), or the
unit is defective (return for repair). Additionally, if the cover is removed for more than 20 minutes, the LEDs
of the detector will not flash.
Test — The trouble condition can be caused intentionally to verify correct operation of the system. Remove the
detector board to cause a trouble condition locally and at the system control panel.
F300-11-00 6 I56-0047-005R
Figure 8. Wiring Diagram for D350RP Duct Smoke
Detector using a UL listed control panel
Figure 10. System Wiring Diagram
for D350RP Duct Smoke Detector
with RTS451/RTS451KEY
Figure 9. Wiring Diagram for D350RP Duct Smoke
Detector with optional RA400Z
+
–
COM (+)
COM (-)
COM (+)
COM (-)
COMMUNICATION
LINE
UL LISTED CONTROL
PANEL 1ST DETECTOR
IN LOOP
2ND DETECTOR
IN LOOP
121
2
J1 JUMPER
J1 JUMPER
COIL NOTE
Please note that the magnetic coil supplied with the RTS451 and RTS451KEY is not
required when these accessories are used with the D350RP detectors. The functionality
of the magnetic coil has been designed into the circuitry of the duct smoke detector.
57RA400Z
5 = Alarm Signal
7 = Aux. Power (–)
DO NOT BREAK TAB ON RA400Z
NOTE: J1 jumper must be removed for
power board supervision. The J1 jumper
must be installed for 2W applications.
ALARM SIGNAL
AUX. POWER (–)
TEST +
TEST –
ALARM SIGNAL
NOT USED
NOT USED
CIRCUIT
REFERENCE
TEST
SWITCH
FOR RTS451, TERMINAL 3 IS NOT
USED. (RTS451 DOES NOT HAVE
A TERMINAL 6.) FOR RTS451KEY,
TERMINALS 3 AND 6 ARE NOT USED.
RTS 451/RTS451KEY
5
7
4
3
1
3
6
2
4
5
[3] Secure The Detector Housing To The Duct
Slide the foam gaskets over the tube bushings as shown in
Figure Use the two 11/4” long sheet metal screws to screw
the detector housing to the duct.
CAUTION: Do not overtighten the screws.
[4] Sampling Tube Installation for Ducts Greater
Than 11⁄2 Feet Wide
The sampling tube is identified by a series of air inlet holes
on the tube. A plastic tube is included for ducts up to 11⁄2
feet wide. All other lengths must be purchased separately.
Order the correct length, as specified in Table 1, for width
of the duct where it will be installed. It is recommended
that the sampling tube length extend at least 2⁄3 across the
duct width for optimal performance. The exhaust tube is
molded onto the base of the duct housing, and the A2440-
00 Exhaust Tube Extension is available as an accessory in
those cases where the molded exhaust port does not extend
at least 2 inches into the duct.
The sampling tube is always installed with the air inlet
holes facing into the air flow. To assist proper installation,
the tube’s mounting flange is marked with an arrow. Make
sure the sampling tube is mounted so that the arrow points
into the air flow (see Figure 4). Figure 5 shows the various
combinations of tube mounting configurations with respect
to air flow. Mounting the detector housing in a vertical ori-
entation is acceptable, provided that a metal sampling tube
is used and the air flows directly into the sampling tube
holes as indicated in Figure 4.
[4.1] Installation For Ducts Greater Than 11⁄2 Feet But
Less Than 8 Feet Wide
1. If the tube is longer than the width of the air duct, drill a
3⁄4″ hole in the duct opposite the hole already cut for the
sampling tube. Make sure the hole is 1″ to 2″ below the
inlet hole on the opposite side of the duct to allow mois-
ture drainage away from the detector. If the tube is shorter
than the width of the air duct, install the end cap into the
sampling tube as shown in Figure 4. Sampling tubes over
3 ft. long must be supported at the end opposite the duct
smoke detector.
2. Slide the tube into the housing bushing that meets the
air flow first. Position the tube so that the arrow
points into the air flow, as shown in Figure 4.
3. Secure the tube flange to the housing bushing with two
#6 self-tapping screws.
4. For tubes longer than the width of the air duct, the tube
should extend out of the opposite side of the duct. If
there are more than 2 holes in the section of the tube
extending out of the duct, select a different length using
Table 1. Otherwise, trim the end of the tube protruding
through the duct so that 1 ″ to 2 ″ of the tube extend out-
side the duct. Plug this end with the end cap and tape
closed any holes in the protruding section of the tube.
Be sure to seal the duct where the tube protrudes.
F300-11-00 3 I56-0047-005R
SCREW HOLES FOR
ATTACHING HOUSING
TO DUCT WORK.
Figure 3. Installation of foam gaskets over sampling
tube bushings:
Figure 5. Tube mounting configurations with varying
air flow direction:
Table 1. Sampling tubes recommended for different
Duct Widths:
Outside Duct Width Sampling Tube Recommended*
1 to 2 ft. (0.3 to 0.6 m) ST-1.5
2 to 4 ft. (0.6 to 1.2 m) ST-3
4 to 8 ft. (1.2 to 2.4 m) ST-5
8 to 12 ft. (2.4 to 3.7 m) ST-10
*Must extend a minimum of 2⁄3 the duct width
SAMPLING
TUBE
END CAP
AIR HOLES
ARROW
MUST FACE
INTO AIR FLOW
AIR FLOW DIRECTION
FLANGE
Figure 4. Air duct detector sampling tube:
AIR FLOW
DIRECTION
DETECTOR
HOUSING
DOTS INDICATE POSITION OF
SAMPLING TUBE HOLES
AIR FLOW
DIRECTION
DETECTOR
HOUSING
SAMPLING
TUBE
EXHAUST
TUBE
AIR FLOW
DIRECTION
EXHAUST
TUBE
SAMPLING
TUBE
SAMPLING
TUBE
EXHAUST
TUBE
DETECTOR
HOUSING
AIR FLOW
DIRECTION
DETECTOR
HOUSING
A. B.
C. D.
HORIZONTAL MOUNTING OF HOUSING
VERTICAL MOUNTING OF HOUSING
NOTE: Only metal sampling tubes can be installed in
orientations C and D.
NOTE: The sampling tube end cap is critical to the proper
operation of the duct smoke detectors. The end cap is
needed to create the proper air flow to the sensor of the
duct smoke detector.

F300-11-00 4 I56-0047-005R F300-11-00 5 I56-0047-005R
[4.2] Installation For Ducts More Than 8 Feet Wide
NOTE: To install sampling tubes in ducts more than 8 feet wide, work must be performed inside the air duct. Sampling
of air in ducts wider than 8 feet is accomplished by using the ST-10 sampling tube. If the tube is shorter than
the width of the air duct, install the end cap into the sampling tube as shown in Figure 4 and support the end
opposite the duct smoke detector.
Install the sampling tube as follows:
1. Drill a 3⁄4-inch hole in the duct directly opposite the hole already drilled for the sampling tube. Make sure the hole is
1 ″ to 2 ″ below the inlet hole on the opposite side of the duct to allow for moisture drainage.
2. Slide the sampling tube with the flange into the housing bushing that meets the air flow first. Position the tube so that
the arrow points into the air flow. Secure the tube flange to the housing bushing with two #6 self-tapping screws.
3. From inside the duct, couple the other sections of the sampling tube to the section already installed using the 1⁄2-inch
conduit fittings supplied. Make sure that the holes on both of the sampling tubes are lined up and facing into the air
flow.
4. Trim the end of the tube protruding through the duct so that 1 ″ to 2 ″ of the tube extend outside the duct. Plug this end
with the end cap and tape closed any holes in the protruding section of the tube. Be sure to seal the duct where the
tube protrudes.
NOTE: An alternate method to using the ST-10 is to use two ST-5 sampling tubes. Remove the flange from one of the
tubes and install as described above. After the installation, use electrical tape to close off some of the sampling
holes so that there are a total of 10 to 12 holes spaced as evenly as possible across the width of the duct.
NOTE: Air currents inside the duct may cause excessive vibration, especially when the longer sampling tubes are used.
In these cases a 3 inch floor flange (available at most plumbing supply stores) may be used to fasten the sam-
pling tube to the other side of the duct. When using the flange/connector mounting technique, drill a 1-inch to
11⁄4-inch hole where the flange will be used.
Figure 6. Sampling tube filter installation:
Wiring connections are made by stripping about 3/8-inch of insulation from the end of the wire, sliding the bare end under
the plate, and tightening the clamping plate screw.
Two LEDs on each duct smoke detector may light, if programmed by the system control panel, to provide a local, visible
indication. Remote LED annunciator capability is available as an option. Each duct smoke detector can only be wired
to one remote accessory.
Panels offer different feature sets across different panel models. As a result, certain features of the D350RP may be
available on some control panels, but not on others. The possible features available in the D350RP, if supported by the
control panel are:
1. Panel controls the LED operation on the duct smoke detector. Operational modes are RED blink, RED continuous,
GREEN blink, GREEN continuous, and off.
2. The remote output may be synchronized to the LED operation or controlled independent of the LEDs.
Please refer to the operation manual for the UL listed control panel for specific operation of the D350RP.
Wiring Instructions
Disconnect power from the communication line before installing the D350RP duct smoke detectors.
Wire the D350RP duct smoke detector per the Control Panel Installation Manual
and Figures 8, 9 or 10. Set the desired address on the sensor board code wheel
address switches.
NOTE: Some panels support extended addressing. In order to set the sensor above
address number 99 on compatible systems, remove the breakaway stop
on the left hand rotary switch. Using pliers, carefully twist and pull off
stop as shown in Figure 7.
[7] Perform Detector Check
1. Perform STANDBY AND TROUBLE TEST per Section [9.2.1].
2. Perform MAGNET TEST per Section [9.2.2.1]. The RTS451 test of Section [9.2.2.2] may substitute for this requirement.
3. Perform AIR FLOW TEST per Section [9.1].
4. Perform SMOKE RESPONSE TEST per Section [9.1.1].
[8] Install The Cover
Install the cover using the six screws that are captured in the housing cover. Be certain filters are installed as specified in
Section [5]. Make sure that the cover fits into the base groove and that all gaskets are in their proper positions. Tighten
the six screws.
[9] Duct Smoke Detector Maintenance and Test Procedures
Test and maintain duct smoke detectors as recommended in NFPA 72. The tests contained in this manual were devised
to assist maintenance personnel in verification of proper detector operation.
Before conducting these tests, notify the proper authorities that the smoke detection system will be temporarily out of
service. Disable the device or system under test to prevent unwanted alarms.
Smoke Entry Tests
[9.1] Air Flow
To verify sufficient sampling of ducted air, use a manometer to measure the differential pressure created from air flow
across the sampling tubes. The pressure should measure no less than 0.03 inches of water and no greater than 1.4 inches
of water. The air handler must be operating for this test.
[9.1.1] Smoke Response
To determine if smoke is capable of entering the sensing chamber, visually identify any obstructions. Plug the exhaust
and sampling tube holes to prevent ducted air from carrying smoke away from the detector head, then blow smoke such
as cigarette, cotton wick, or punk directly at the head to cause an alarm. REMEMBER TO REMOVE THESE PLUGS AFTER
THIS TEST, OR THE DETECTOR WILL NOT FUNCTION PROPERLY.
[5] Install The Filters
To install the sampling tube filters, simply push the filters
into the sampling and exhaust tube holes, as shown in
Figure 6. If a metal sampling tube is used, install the filters
over the tube end.
[6] Field Wiring Installation Guidelines
All wiring must be installed in compliance with the
National Electrical Code and the local codes having juris-
diction. Proper wire gauges should be used. The conduc-
tors used to connect smoke detectors to control panels and
accessory devices should be color-coded to prevent wiring
mistakes. Improper connections can prevent a system from
responding properly in the event of a fire.
CAUTION
Filters require periodic cleaning or replacement, depending on the amount of dust and dirt accumulated. Visually inspect
the filters at least quarterly; inspect them more often if the dust accumulation warrants it. See Section [9.1.2] for more
information. Replacement filters can be ordered (filter P/N F36-09-11).
For signal wiring, (the wiring between detectors or from detectors to auxiliary devices), it is usually recommended that
single conductor wire be no smaller than 18 gauge. The duct smoke detector terminals accommodate wire sizes up to 12
gauge. The last foot of conduit should be flexible conduit (available in electrical supply houses), which facilitates easier
installation and puts less strain on the conduit holes in the housing. Solid conduit connections may be used if desired.
Smoke detectors and alarm system control panels have specifications for Signaling-Line Circuit (SLC) wiring. Consult the
control panel manufacturer’s specifications for wiring requirements for the particular model control panel being used
before wiring the detector loop.
The D350RP detector is designed for ease of wiring. The housing provides a terminal strip with clamping plates.
BREAKAWAY STOP
Figure 7. Rotary Address Switches