INSTALLATION AND MAINTENANCE INSTRUCTIONS

I56-3255-003R
One FireLite Place
Northford, CT 06472
D355PL Duct Smoke Detector Phone: 203.484.7161
Specifications
Operating Temperature: –4° to 158°F (–20° to 70°C)
32° to 120°F (0° to 49°C) with module installed in the D355PL ACCESSORY CURRENT LOADS AT 24 VDC
Storage Temperature: –22° to 158°F (–30° to 70°C) DEVICE STANDBY ALARM
Humidity: 0% to 93% Relative Humidity Non-condensing RA400Z/RA100Z 0mA 12mA Max.
Air Velocity: 100 to 4000 ft./min. (0.5 to 20.3 m/sec.) RTS451/RTS151 0mA 12mA Max.
Rectangular Footprint Dimensions: 14.38 in L×5 in W×2.5 in D (37 cm L×12.7 cm W×6.36 cm D)
RTS451KEY/
Square Footprint Dimensions: 7.75 in L×9 in W×2.5 in D (19.7 cm L×22.9 cm W×6.35 cm D) 12mA 12mA Max.
RTS151KEY
Weight: 1.8 pounds; 0.82 kg
Operating Voltage Range: 15 to 32 VDC
Standby Current: 300µA @ 24 VDC (one communication every 5 seconds with LED blink enabled)
Max. Alarm Current (LED on): 6.5 mA @ 24 VDC
NOTE: The D355PL come with the sensor head factory installed, part number SD355R. [2]General Description
Table of Contents Page Smoke introduced into this air duct system will be distributed throughout the
[1] Limitations of Duct Smoke Detectors. . . . . . . . . . . . . . . . . . . . . . . . . 1 entire building. Smoke detectors designed for use in air duct systems are used
[2] General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 to sense the presence of smoke in the duct.
[3] Contents of the Duct Smoke Detector Kit. . . . . . . . . . . . . . . . . . . . . . 1 Model D355PL Air Duct Smoke Detector utilizes photoelectric technology for
[4] Detector Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 the detection of smoke. This detection method, when combined with an ef-
[5] Sampling Tube Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 ficient housing design, samples air passing through the duct and allows detec-
[6] Measurement Tests. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 tion of a developing hazardous condition. When sufficient smoke is sensed,
[7] Field Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 an alarm signal is initiated at the fire control panel monitoring the detector,
[8] Verification of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 and appropriate action can be taken to shut off fans, blowers, change over air
[9] Dectector Cleaning Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 handling systems, etc. These actions can facilitate the management of toxic
[10] Sensor Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 smoke and fire gases throughout the areas served by the duct system.
[11] Optional Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 The D355PL incorporates a sensor cover tamper feature that provides a trou-
ble signal at the panel immediately if the cover is removed or improperly in-
Before Installing
stalled. Proper installation of the sensor cover removes the trouble condition.
Read the System Sensor Guide for Proper Use of Smoke Detectors in Duct Appli-
cations (A05-1004), which provides detailed information on detector spacing, If programmed with the system control panel, two LEDs on each duct smoke
placement, zoning, wiring, and special applications. Copies of this manual detector light to provide local visible indication.
are available online at www.systemsensor.com. NFPA Standards 72 and 90A The D355PL provides a remote alarm output for use with auxiliary devices,
should also be referenced for detailed information. such as the RA400Z/RA100Z remote LED annunciator, as well as remote test ca-
NOTICE: This manual shall be left with the owner/user of this equipment. pability with the RTS451/151 or RTS451KEY/RTS151KEY Remote Test Stations.
IMPORTANT: This detector must be tested and maintained regularly following [2.1] DETECTOR FEATURE SET
NFPA 72 requirements. The detector should be cleaned at least once a year. – Utilizes plug-in head, part number SD355R
[1]Limitations Of Duct Smoke Detectors – Sampling tubes install from front and rear
– Compatible with existing accessories
WARNING – Able to address detector per code switches on sensor head.
The National Fire Protection Association has established that DUCT DETEC-
[3]Contents Of The Duct Smoke Detector Kit
TORS MUST NOT BE USED AS A SUBSTITUTE FOR OPEN AREA DETECTOR
1. Sensor/power board assembly and covers sensor head is factory installed
PROTECTION as a means of providing life safety. Nor are they a substitute for
2. Three #10 sheet metal screws for mounting
early warning in a building’s regular fire detection system.
3. One test magnet
System Sensor supports this position and strongly recommends that the user 4. Drilling template
read NFPA Standards 90A, 72, and 101. The D355PL Air Duct Smoke Detectors 5. One sampling tube end cap
are listed per UL 268A. 6. One plastic exhaust tube
This device will not operate without electrical power. Fire situations may NOTE: A sampling tube must be ordered to complete the installation. It must
cause an interruption of power. The system safeguards should be discussed be the correct length for the width of the duct where it will be installed. See
with your local fire protection specialist. Table 1 on page 3 to determine the inlet tube required for different duct widths.

This device will not sense smoke unless the ventilation system is operating [4]Detector Installation
and the cover is installed. [4.1]Verify Duct Air Flow Direction And Velocity
Model D355PL detectors are designed to be used in air handling systems hav-
For this detector to function properly, it MUST be installed according to the in- ing air velocities of 100 to 4000 feet per minute. Duct widths from 6 inches to
structions in this manual. Furthermore, the detector MUST be operated within 12 feet can be accommodated. Be sure to check engineering specifications to
ALL electrical and environmental specifications listed in this manual and the ensure that the air velocity in the duct falls within these parameters. If neces-
sensor head installation manual. Failure to comply with these requirements sary, use a velocity meter (anemometer) to check the air velocity in the duct.
may prevent the detector from activating when smoke is present in the air duct.
[4.2]Determine Mounting location and Configuration
On ducts wider than 18 inches it is recommended that the detector be
mounted downstream of a bend, obstruction in the duct, or the supply or
return air inlet.

FL-300-000 1 I56-3255-003R
Figure 1. Exploded View of Duct Smoke Detector Components:
EXHAUST TUBE

WIRING COMPARTMENT

WIRING COMPARTMENT COVER

SAMPLING
TUBE
SOLD
SEPERATELY

SENSOR MODULE
SENSOR HEAD

SENSOR MODULE COVER

H0569-02

Exception: Installation of duct detectors can be on or within a commercial [4.4]Secure the Duct Detector to the Duct
packaged rooftop heating and air-conditioning system, fire/smoke dampers Use two (rectangular configuration) or three (square configuration) of the pro-
and economizers. They may be mounted in either the supply and/or return air vided sheet metal screws to screw the duct detector to the duct.
section as determined by local code. CAUTION: Do not overtighten the screws.
Once a suitable location is selected, determine if the detector is to be mounted [5]Sampling Tube Installation
in a side-by-side “rectangular” configuration or a top-over-bottom “square” [5.1]Sampling Tube Selection
configuration as shown in Figure 2. If mounting in the square configuration, The sampling tube must be purchased separately. Order the correct length,
remove the rear attachment screw, rotate the unit at hinge, and replace the as specified in Table 1, for width of the duct where it will be installed. The
screw into the new attachment hole as shown in Figure 2. Do NOT remove sampling tube length must extend at least 2/3 across the duct width for optimal
the hinge screw during this process. Final installation approval shall be based performance.
upon passing differential pressure and smoke entry tests described in the Mea-
surement Tests section. The sampling tube is always installed with the air inlet holes facing into the
air flow. To assist proper installation, the tube’s connector is marked with an
Figure 2: arrow. Make sure the sampling tube is mounted so that the arrow points into
REMOVE SCREW AND PIVOT REPLACE SCREW the airflow as shown in Figure 3. Mounting the detector housing in a vertical
DETECTOR AS SHOWN BELOW. TO SECURE DETECTOR orientation is acceptable provided that the air flows directly into the sam-
IN PLACE.
pling tube holes as indicated in Figure 3. The sampling tube and exhaust tube
can be mounted in either housing connection as long as the exhaust tube is
mounted downstream from the sampling tube.
Table 1. Sampling tubes recommended for
different duct widths:
Outside Duct Width Sampling Tube Recommended*
Up to 1 ft. DST1
1 to 2 ft. DST1.5
2 to 4 ft. DST3
H0550-00 4 to 8 ft. DST5
[4.3]Drill the Mounting Holes 8 to 12 ft. DST10 (2-piece)
Remove the paper backing from the mounting template supplied. Affix the
template to the duct at the desired mounting location. Make sure the template *Must extend a minimum of 2⁄3 the duct width
lies flat and smooth on the duct.
Figure 3. Air duct detector sampling tube:
[4.3.1]For rectangular side-by-side mounting configuration:
Center punch at (4) target centers: (2) “A” for sampling tubes and (2) “B” for
SAMPLING TUBE ENDCAP
the rectangular configuration mounting tabs as shown on mounting template.
Drill pilot holes at target “A” centers and cut two 1.375 inch diameter holes
using a 13⁄8-inch hole saw or punch. Drill .156 inch diameter holes using a 5⁄32
inch drill at target “B” centers.
[4.3.2]For square top-over-bottom mounting configuration:
Center punch at (4) target centers: (2) “A” for sampling tubes and (2) “C” for
the square configuration mounting tabs as shown on mounting template. Drill
pilot holes at target “A” centers and cut two 1.375 inch diameter holes using ARROW MUST FACE AIR FLOW
a 13⁄8-inch hole saw or punch. Drill .156 inch diameter holes using a 5⁄32 inch INTO AIR FLOW DIRECTION
drill at target “C” centers. If desired, drill an additional .156 inch hole at the H0551-00
location of one of the mounting tabs on the lower housing.

FL-300-000 2 I56-3255-003R
 CAUTION: The sampling tube end cap, included with the detector, is criti- [5.4]Remote Sampling Tube Installation
cal to proper operation of the duct smoke detector. The end cap is needed to The detector arrangement can also incorporate the remote mounting of the
create the proper air flow to the sensor of the duct smoke detector. Once any sampling tube and/or exhaust tube. In this case both the detector, sampling
sampling tube length adjustments are made, plug the end of the sampling tube tube and exhaust tube (if included) should be rigidly mounted to withstand
with the provided end cap. the pressure and vibrations caused by the air velocity. The location of the
detector’s sampling tube should be such that there is uniform airflow in the
A plastic exhaust tube is included with the unit to be installed if needed. In-
cross section area.
stall into the housing connection that is downstream from the sampling tube
connection. The exhaust tube can be installed from the front of the detector Pressure differential across the sampling and exhaust ports in the detector hous-
or the back. A longer 1 foot exhaust tube, model ETX, is available as an acces- ing shall be verified to be between 0.01 and 1.11 inches of water. Do so by mea-
sory in cases where the molded exhaust tube does not extend at least 2 inches suring the pressure difference between the inlet and outlet ports on the detector
into the duct. housing using a manometer as described in the Measurement Tests sectiont of
this manual.
[5.2]Sampling Tube Installation
1. For tubes shorter than the width of the duct, slide the sampling tube, [6]Measurement Tests
with installed end cap, into the housing connection that meets the air- [6.1]Air Flow
flow first. Position the tube so that the arrow points into the airflow as The D355PL is designed to operate over an extended air speed range of 100
shown in Figure 3. Per NFPA sampling tubes over 3 feet long should be to 4000 FPM. To verify sufficient sampling of ducted air, turn the air handler
supported at the end opposite of the duct detector. In ducts wider than 8 on and use a manometer to measure the differential pressure between the two
feet, work must be performed inside the duct to couple the other section sampling tubes. The differential pressure should measure at least 0.01 inches
of the sampling tube to the section already installed using the ½-inch of water and no more than 1.11 inches of water. Because most commercially
conduit fitting supplied. Make sure that the holes on both sections of the available manometers cannot accurately measure very low pressure differen-
air inlet sampling tube are lined up and facing into the airflow. tials, applications with less than 500 FPM of duct air speed may require one
2. For tubes longer than the width of the air duct, the tube should extend of the following: 1) the use of a current-sourcing pressure transmitter (Dwyer
out of the opposite side of the duct. Drill a ¾-inch hole in the duct op- Series 607) or 2) the use of aerosol smoke, see below for test descriptions.
posite the hole already cut for the sampling tube. Ensure that the sam- Figure 5. Procedure for verifying air flow:
pling tube is angled downward from the duct smoke detector to allow for TO SAMPLING TUBE
TO EXHAUST TUBE
moisture drainage away from the detector. The sampling tube should be
angled at least 1⁄4˝ downward for every 12˝ of duct width per Figure 4.
There should be 10 to 12 holes spaced as evenly as possible across the HIGH LOW
DIFFERENTIAL
width of the duct. If there are more than 2 holes in the section of the tube PRESSURE
TRANSMITTER
extending out of the duct, select a shorter tube using Table 1. Otherwise, MODEL #607-01

trim the tube to leave approximately 1 to 2 inches extending outside the 15 TO 36

VDC SUPPLY
duct. Plug the end with the end cap and tape closed any holes in the 9 VOLT
BATTERY
protruding section of the tube. Be sure to seal the duct where the tube 1000 OHM 5% 9 VOLT
BATTERY
1 WATT RESISTOR 9 VOLT
protrudes. BATTERY

Figure 4.
VOLT METER FLUKE
MODEL 87 OR
EQUIVALENT
H0163-01
12˝ + –

/˝
1 4

[6.2]Low Flow Air Flow Test using Dwyer Series 607

Differential Pressure Transmitter
Verify the air speed of the duct using an anemometer. Air speed must be at
2˝ least 100 FPM. Wire the Dwyer transmitter as shown in Figure 5. Connect the
leads of the meter to either side of the 1000Ω resistor. Allow unit to warm up
for 15 seconds. With both HIGH and LOW pressure ports open to ambient air,
measure and record the voltage drop across the 1000Ω resistor (measurement
/˝
3 4
DETECTOR 1), 4.00 volts is typical. Using flexible tubing and rubber stoppers, connect the
HOLE HIGH side of the transmitter to the sampling tube of the duct smoke detec-
tor housing, and the LOW side of the transmitter to the exhaust tube of the
H0215-00
duct smoke detector housing. Measure and record the voltage drop across the
NOTE: Air currents inside the duct may cause excessive vibration, especially 1000Ω resistor (measurement 2). Subtract the voltage recorded in measure-
when the longer sampling tubes are used. In these cases, a 3-inch floor flange ment 1 from the voltage recorded in measurement 2. If the difference is greater
(available at most plumbing supply stores) may be used to fasten the sam- than 0.15 volts, there is enough air flow through the duct smoke detector for
pling tube to the other side of the duct. When using the flange/connector proper operation.
mounting technique, drill a 1 to 1¼-inch hole where the flange will be used
[7]Field Wiring; Installation Guidelines
[5.3]Modifications of Sampling Tubes All wiring must be installed in compliance with the National Electrical Code
There may be applications where duct widths are not what is specified for the and the local codes having jurisdiction. Proper wire gauges should be used.
installation. In such cases, it is permissible to modify a sampling tube that is The conductors used to connect smoke detectors to control panels and acces-
longer than necessary to span the duct width.
Please refer to insert for the Limitations of Fire Alarm Systems sory devices should be color-coded to prevent wiring mistakes. Improper con-
nections can prevent a system from responding properly in the event of a fire.
Use a 0.193-inch diameter (#10) drill and add the appropriate number of holes
Three-Year Limited Warranty so that the total number of holes exposed to the air flow in the duct is 10 to 12. For signal wiring (the wiring between detectors or from detector to auxiliary
System Sensor warrants its enclosed product to be free from defects in materials and #__________, 3825 Ohio Avenue, St. Charles, IL 60174. Please include a note describing Space the additional holes as evenly as possible over the length of the tube.
workmanship under normal use and service for a period of three years from date of
devices), it is usually recommended that single conductor wire be no smaller
the malfunction and suspected cause of failure. The Company shall not be obligated to
manufacture. System Sensor makes no other express warranty for the enclosed product. replace units which are found to be defective because of damage, unreasonable use, CAUTION: This procedure should only be used as a temporary fix. It is not than 18 gauge. The duct smoke detector terminals accommodate wire sizes up
No agent, representative, dealer, or employee of the Company has the authority to in- modifications, or alterations occurring after the date of manufacture. In no case shall the intended as a permanent substitute for ordering the correct length tubes. to 12 gauge. Flexible conduit is recommended for the last foot of conduit; solid
crease or alter the obligations or limitations of this Warranty. The Company’s obligation Company be liable for any consequential or incidental damages for breach of this or any conduit connections may be used if desired.
of this Warranty shall be limited to the replacement of any part of the product which other Warranty, expressed or implied whatsoever, even if the loss or damage is caused by
Duct smoke detectors and alarm system control panels have specifications for
is found to be defective in materials or workmanship under normal use and service the Company’s negligence or fault. Some states do not allow the exclusion or limitation of
during the three year period commencing with the date of manufacture. After phoning
Signaling Line Circuit (SLC) wiring. Consult the control panel manufacturer’s
incidental or consequential damages, so the above limitation or exclusion may not apply
System Sensor’s toll free number 800-SENSOR2 (736-7672) for a Return Authorization to you. This Warranty gives you specific legal rights, and you may also have other rights specifications for wiring requirements before wiring the detector loop.
number, send defective units postage prepaid to: System Sensor, Returns Department, RA which vary from state to state.

FL-300-000 6 I56-3255-003R FL-300-000 3 I56-3255-003R

©2009 System Sensor
[7.1]Wiring Instructions [8.4.1]Test THE UNIT [10]Sensor Replacement [11.2] Option 2:
Disconnect power from the communication line before installing the D355PL 1. M02-04-00 Magnet Test – This sensor can be functionally tested with a 1. Remove the sensor head by rotating counterclockwise. remote test using a test coil:
duct smoke detector. test magnet. The test magnet electronically simulates smoke in the sensing 2. Pull gently to remove it. The use of a remote test station requires the installation of an accessory
chamber, testing the sensor electronics and connections to the control panel. 3. To replace the sensor head, align the mounting features and rotate clock- coil, part number DCOIL, sold separately.
The D355PL detectors are designed for easy wiring. The housing provides a
2. Remote Test Accessory – The use of a remote accessory for visible indica- wise into place.
terminal strip with clamping plates. Wiring connections are made by sliding
tion of power and alarm is recommended. 1) Install DCOIL in housing pocket insuring that arrow is pointing toward detector
the bare end under the plate, and tightening the clamping plate screw. See [11] OPTIONAL ACCESSORIES
2) Install DCOIL mounting screw
Figure 6 below for system wiring. Verify system control panel alarm status and control panel execution of all Optional accessories include RA400Z/RA100Z, RTS451/RTS151 and
3) Connect each DCOIL lead to a Test Coil Terminal
intended auxiliary functions (i.e. fan shutdown, damper control, etc.). RTS451KEY/RTS151KEY.
Figure 6. System wiring diagram for D355PL: See Figure 10 below for reference.
Two LEDs on the sensor are controlled by the panel to indicate sensor sta- NOTE: Ensure blue wire always remains connected to RA+ on the field
tus. Coded signals, transmitted from the panel, can cause the LEDs to blink, connector side of the terminal block.
latch on, or latch off. Refer to the control panel technical documentation for Figure 10. D355PL using A Test Coil
sensor LED operation and expected delay to alarm. Figure 8. Wiring Diagram for D355PL to RA400Z/RA100Z:
COMM.
LINE (+) [8.4.2] The detector must be reset by the system control panel
COMM. [8.4.3]Smoke Entry test using Aerosol Smoke + RA
LINE This test is intended for low-flow systems (100-500 FPM). If the air speed is (+)
COMM. greater than 500 FPM, use a conventional manometer to measure differential RA400Z/RA100Z
LINE (–) pressure between the sampling tubes, as described under Measurement Tests
on Page 3. – RA
(-)
Drill a 1⁄4-inch hole 3 feet upstream from the duct smoke detector. With the air
UL/FM LISTED 1ST 2ND handler on, measure the air velocity with an anemometer. Air speed must be REMOTE ALARM LED
CONTROL DETECTOR DETECTOR at least 100 FPM. Spray aerosol smoke* into the duct through the 1⁄4-inch hole OPTION 1 PER UNIT
PANEL IN LOOP IN LOOP for five seconds. Wait two minutes for the duct smoke detector to alarm. If the
HO572-00 duct smoke detector alarms, air is flowing through the detector. Remove the
duct smoke detector cover and blow out the residual aerosol smoke from the H0570-03
[7.2] SET THE ADDRESS chamber and reset the duct smoke detector at the panel. Use duct tape to seal
Set the desired address on the sensor head code wheel switches. on the back the aerosol smoke entry hole. Remember to replace the cover after the test or Note: If using a RA400Z, the tab should be broken for use with the intelli-
DCOIL
of the sensor head. the detector will not function properly. gent duct smoke detector. If using RA100Z, ensure that jumper is removed. TEST COIL SCREW H0561-01
figure 7. Rotary address switches *Aerosol smoke can be purchased from Home Safeguard Industries at home- TEST COIL TERMINALS
safeguard.com, model 25S Smoke Detector Tester, and Chekkit Smoke Detector
Tester model CHEK02 and CHEK06 available from SDi. When used properly, Figure 11. Wiring Diagram from D355PL to RTS451/RTS151/
The RTS451/RTS151/RTS451KEY/RTS151KEY Remote Test Station facilitates RTS451KEY/RTS151KEY Using A Test Coil:
the canned smoke agent will cause the smoke detector to go into alarm. Re-
test of the alarm capability of the duct smoke detector. These accessories pro-
fer to the manufacturer’s published instructions for proper use of the canned
vide the stimulus to initiate an alarm condition at the detector. The D355PL
smoke agent.
duct smoke detector must be reset by the system control panel. TEST COIL +
CAUTION [11.1] Option 1: * EXTERNAL
4 5
Canned aerosol simulated smoke (canned smoke agent) formulas will vary by remote test using sensor with remote test capability TEST COIL – (-) POWER (+)
SUPPLY
manufacturer. Misuse or overuse to these products may have long term adverse (without a test coil): COMM + 1 2 3
effects on the smoke detector. Consult the canned smoke agent manufacturer’s A sensor with suffix "R" is available for use inside the D355PL. Suffix "R"
published instructions for any further warnings or caution statements. represents a head with Remote Test Capability. Using this head inside the OUT (CONV ONLY) +
RTS451/151,
D355PL eliminates the need for a test coil when wired to a RTS451/RTS151/ RTS451/151KEY
[9]Detector Cleaning Procedures RTS451KEY/RTS151KEY Remote Test Station. COMM –
HO112-00 REMOTE TEST STATION
Notify the proper authorities that the smoke detector system is undergoing To install the RTS451/RTS151/RTS451KEY/RTS151KEY, using the sensor with RA/RTS –
[8] VERIFICATION OF OPERATION maintenance, and that the system will temporarily be out of service. Disable remote test capability connect the device as shown in Figure 9; wire runs must LED OPTION
[8.1]Install The Cover the zone or system undergoing maintenance to prevent unwanted alarms and be limited to 25 ohms or less per interconnecting wire. RA + 1 PER UNIT
10mA CURRENT DRAW
Install the covers making sure that the cover fits into the base groove. Tighten possible dispatch of the fire department.
NOTE: Resistor assembly must be in place between RA+ and OUT+ RTS +
the seven screws that are captured in the covers. Note that the cover must be [9.1]Detector Sensor inside the D355PL for Remote Test function to operate. TEST COIL OPTION
properly installed for proper operation of the sensor. 1. Remove the sensor to be cleaned from the system. 1 PER UNIT
95mA CURRENT DRAW
NOTE: Verify sensor cover gasket is properly seated on cover prior to cover 2. Remove the sensor cover by pressing firmly on each of the four removal
figure 9. RTS451/RTS451KEY/RTS151/RTS151KEY Using
installation. tabs that hold the cover in place. H0571-07
Sensor With Remote Test Capability
3. Vacuum the screen carefully without removing it. If further cleaning is re-
[8.2] POWER THE UNIT quired continue with Step 4, otherwise skip to Step 7.
Activate the communication line on terminals COM + and COM –. TEST COIL + NOTE: The RTS451/151, RTS451/151KEY test coil circuit requires an
4. Remove the chamber cover/screen assembly by pulling it straight out.
RTS451/RTS451KEY external 24 VDC power supply which must be UL listed.
[8.3] DETECTOR CHECK 5. Use a vacuum cleaner or compressed air to remove dust and debris from TEST COIL – RTS151/RTS151KEY
Standby – If programmed by the system control panel, look for the presence of the sensing chamber.
the flashing LEDs through the transparent housing cover. The LED will flash 6. Reinstall the chamber cover/screen assembly by sliding the edge over the COMM + [11.3] Additional Module Option
1 The D355PL can also accommodate a relay or control module (sold sepa-
with each communication. sensing chamber. Turn until it is firmly in place.
7. Replace the cover using the LEDs to align the cover and then gently pushing
OUT (CONV ONLY) + rately) within the power board side of the housing. The relay or control mod-
Trouble – If programmed by the system control panel and the detector LEDs 2 ule must be listed as compatible to the fire alarm control panel.
it until it locks into place. COMM –
do not flash, then the detector lacks power (check wiring, missing or improp-
8. Reinstall the detector. Physical Module Mounting
erly placed cover, panel programming, or power supply), the sensor head is 3 JUMPER
missing (replace), or the unit is defective (return for repair). [9.2]Reinstallation RA/RTS –
1) Remove the breakaway tabs at the four corners of the module
1. Reinstall the detector in its housing. 2) Locate the module at right most corner of the power board. The upper
[8.4]Duct Smoke Detector Test & Maintenance Procedures RA + 4
2. Restore system power. left corner mounting hole of the module will align with a screw boss in
Test and maintain duct smoke detectors as recommended in NFPA 72. The
3. Perform Detector Check. RTS + 5 the housing.
tests contained in this manual were devised to assist maintenance personnel
4. Notify the proper authorities testing has been completed and the smoke
in verification of proper detector operation. 3) Install a #8×3⁄8˝ Plastite screw at the screw boss location
detector system is back in operation. H0633-00
Before conducting these tests, notify the proper authorities that the smoke
Note: See the corresponding module Installation Instructions for general
detection system will be temporarily out of service. Disable the zone or system
description, control panel compatibility, wiring and ratings.
under test to prevent unwanted alarms.

FL-300-000 4 I56-3255-003R FL-300-000 5 I56-3255-003R