Greystone Energy Systems DSD240 User manual

DSD240 Duct Smoke Detector
INSTALLATION AND MAINTENANCE INSTRUCTIONS
TABLE OF CONTENTS PAGE
[1] Limitations of Duct Smoke Detectors. . . . . . . . . . . . . . . . . . . . . . . . . . 1
[2] Exploded View of Duct Smoke Detector Components .............2
[3] General Description ......................................2
[4] Contents of Duct Smoke Detector Kit. . . . . . . . . . . . . . . . . . . . . . . . . . 2
[5] Detector Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
[6] Sampling Tube Installation .................................3
[7] Measurement Tests. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
[8] Field Wiring Installation Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . 4
[9] Detector Status Indication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
[10] Interconnection (Multiple Fan Shut Down). . . . . . . . . . . . . . . . . . . . . 4
[11] Verification of Operation ..................................5
[12] Detector Cleaning Procedures ..............................6
[13] Sensor Replacement .....................................6
[14] Optional Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Wiring Diagrams. ............................................... 4- 6
Detector Status ........................................... 7
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
BEFORE INSTALLING
Read the Applications Guide for Duct Smoke Detectors, which provides
information on detector spacing, placement, zoning, wiring, and special
applications. This manual is available online at www.greystoneenergy.com.
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.
I56-9200-001
SPECIFICATIONS
Operating Temperature: –4° to 158° F (–20° to 70° C)
Storage Temperature: –22° to 158° F (–30° to 70° C)
Humidity: 0% to 95% Relative Humidity Non-condensing
Air Velocity: 100 to 4000 ft./min. (0.5 to 20.3 m/sec.)
DSD240 Footprint Dimensions: Rectangular - 14.38 in L x 4.57 in W x 2.67 in D (37cm L x 11.6cm W x 6.8cm D)
Square - 7.75 in L x 9 in W x 2.67 in D (19.7cm L x 22.9cm W x 6.8cm D)
DSD240 Weight: 2.5 pounds; 1.14 kg
Electrical
Power supply voltage: 20-29 VDC 24 VAC 50-60-Hz 240 VAC 50-60 Hz
Input capacitance: 270 µF max. 270 µF max. N/A
Reset Voltage: 3.0 VDC min. 2.0 VAC min. 10 VAC min.
Reset Time (with RTS451/RTS151): .03 to 0.3 sec. .03 to 0.3 sec. .03 to 0.3 sec.
Reset Time (by power down): 0.6 sec. max. 0.6 sec. max. 0.6 sec. max.
Power Up Time: 35 sec. max. 35 sec. max. 35 sec. max.
Alarm response time: 15 sec. 15 sec. 15 sec.
Sensitivity Test: See detector label See detector label See detector label
Current Requirements (Using No Accessories)
Max. standby current 21 mA @ 24 VDC 65 mA RMS @ 24VAC 60Hz 10 mA RMS @ 240 VAC 60 Hz
Max. alarm current 65 mA @ 24 VDC 135 mA RMS @ 24 VAC 60 Hz 18 mA RMS @ 240 VAC 60 Hz
CONTACT RATINGS
Alarm initiation contacts (SPST) 2.0A @ 30 VDC (resistive)
Alarm auxiliary contacts (DPDT) 10A @30 VDC (resistive)
10A @250 VAC (resistive)
1/2HP @240 VAC
1/4HP @120 VAC
NOTE: Alarm auxiliary contacts shall not be connected to initiating circuits of
control panels. Use the alarm initiation contact for this purpose.
Supervisory Contacts (SPDT) 2.0A @ 30 VDC (resistive)
2.0A @ 125 VAC (resistive)
ACCESSORY CURRENT LOADS AT 24 VDC
DEVICE STANDBY TROUBLE ALARM
APA151 12.5mA n/a 30mA Max.
MHR/MHW 0mA n/a 29mA Max.
RA100Z 0mA n/a 12mA Max.
RTS151 0mA n/a 12mA Max.
RTS151KEY 12mA n/a 12mA Max.
NOTE: Any combination of accessories may be used such that the given
accessory loads are: 110mA or less at the Aux output, and 50mA or less at the
Alarm output.
[1] LIMITATIONS OF DUCT SMOKE DETECTORS
WARNING
The National Fire Protection Association has established that DUCT DETEC-
TORS 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.
Greystone Energy supports this position and strongly recommends that the user
read NFPA Standards 90A, 72, and 101. The DSD240 Air Duct Smoke Detector
is listed per UL 268A.
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.
This device will not sense smoke unless the ventilation system is operating and
the cover is installed.
For this detector to function properly, it MUST be installed according to the
instructions in this manual. Furthermore, the detector MUST be operated within
ALL electrical and environmental specifications listed in this manual. Failure to
comply with these requirements may prevent the detector from activating when
smoke is present in the air duct.
150 English Drive, Moncton, NB E1E 4G7 Canada
Tel: [phone] Fax: [phone]
www.greystoneenergy.com
IN-GE-DSD240-01-01 1 I56-9200-001
5/6/2019

POWER BOARD
EXHAUST TUBE
METAL SAMPLING TUBE
(sold separately)
POWER BOARD
MODULE COVER
SENSOR HEAD
SENSOR MODULE
COVER
MAGNET TEST
SMOKE TEST PORT
[3] GENERAL DESCRIPTION
Smoke introduced into an air duct system will be distributed throughout the
entire building. Smoke detectors designed for use in air duct systems are used to
sense the presence of smoke in the duct.
Model DSD240 Duct Smoke Detector utilizes 4-wire photoelectric technology
for the detection of smoke. This detection method, when combined with an
efficient housing, samples air passing through the duct allowing detection of
a developing hazardous condition. When sufficient smoke is sensed, an alarm
signal is initiated and appropriate action can be taken to shut off fans, blowers,
change over air handling systems, etc. These actions can facilitate the manage-
ment of toxic smoke and fire gases throughout the areas served by the duct
system.
The DSD240 detector is designed to operate on 24 VDC/VAC or 240 VAC. Alarm
and supervisory relay contacts are available for control panel interface (alarm
initiation), HVAC control, and other auxiliary functions. The fire alarm control
panel is NOT notified when sensor maintenance its required. Auxiliary relays
are provided for fan shut down. Detector interconnection provides signaling of
up to 30 other detectors in the loop for multiple fan shut down. These detectors
are not designed for 2-wire applications.
[3.1] DETECTOR FEATURE SET
-Utilizes 2D51 plug-in head
-Cover missing signal
-Sampling tubes install from front or rear of detector
-Compatible with existing accessories
[4] CONTENTS OF THE DUCT SMOKE DETECTOR KIT
1. Sensor/power board assembly and cover(s)
2. Three #10 sheet metal screws for mounting
3. Drilling template
4. One sampling tube end cap
5. One plastic exhaust tube
NOTE: A sampling tube must be ordered to complete the installation. It must be
the correct length for the width of the duct where it will be installed. See Table 1
on page 3 to determine the inlet tube required for different duct widths.
[5] DETECTOR INSTALLATION
[5.1] VERIFY AIR FLOW DIRECTION AND VELOCITY
Model DSD240 detectors are designed to be used in air handling systems with
air velocities of 100 to 4000 feet per minute. Duct widths from 6 inches to 12 feet
can be accommodated. 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 (anemometer) to check the air velocity in the duct.
[5.2] 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.
Exception: Installation of duct detectors can be on or within a commercial
packaged rooftop heating and air-conditioning system, fire/smoke dampers and
economizers. They may be mounted in either the supply and/or return air sec-
tion as determined by local code.
Once a suitable location is selected, determine if the detector is to be mounted
in a side-by-side “rectangular” configuration or a top-over-bottom “square”
configuration as shown in Figure 2. If mounting in the square configuration,
remove the rear attachment pin, rotate the unit at the hinge, and replace the
pin into the new attachment hole as shown in Figure 2. Do NOT remove the
hinge screw during this process. Final installation approval shall be based upon
passing section 7.2.
FIGURE 2:
REMOVE PIN AND PIVOT
DETECTOR AS SHOWN BELOW.
REPLACE PIN TO
SECURE DETECTOR
IN PLACE.
H0638-00
[5.3] DRILL THE MOUNTING HOLES
Remove the paper backing from the mounting template supplied. Affix the tem-
plate to the duct at the desired mounting location. Make sure the template lies
flat and smooth on the duct.
[5.3.1] FOR RECTANGULAR SIDE-BY-SIDE MOUNTING CONFIGURATION:
Center punch at (4) target centers: (2) “A” for sampling tubes and (2) “B” for 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
13/8inch hole saw or punch. Drill .156 inch diameter holes using a 5/32 inch drill
at target “B” centers.
[5.3.2] 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 a
13/8inch hole saw or punch. Drill .156 inch diameter holes using a 5/32 inch drill
at target “C” centers. If desired, drill an additional .156 inch hole at the location
of one of the mounting tabs on the lower housing.
[5.4] SECURE THE DUCT DETECTOR TO THE DUCT
Use two (rectangular configuration) or three (square configuration) of the pro-
vided sheet metal screws to screw the duct detector to the duct.
CAUTION: Do not overtighten the screws.
[2] FIGURE 1. EXPLODED VIEW OF DUCT SMOKE DETECTOR COMPONENTS:
H0637-00
IN-GE-DSD240-01-01 2 I56-9200-001
5/6/2019

[6] SAMPLING TUBE INSTALLATION
[6.1] SAMPLING TUBE SELECTION
The sampling tube 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 recom-
mended that the sampling tube length extend at least 2/3across the duct width
for optimal performance.
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
4 to 8 ft. DST5
8 to 12 ft. DST10 (2-piece)
*Must extend a minimum of 2/3the duct width.
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
arrow. Make sure the sampling tube is mounted so that the arrow points into
the airflow as shown in Figure 3. Mounting the detector housing in a vertical
orientation is acceptable provided that the air flows directly into the sampling
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.
FIGURE 3. AIR DUCT DETECTOR SAMPLING TUBE:
SAMPLING TUBE ENDCAP
ARROW MUST FACE
INTO AIR FLOW
AIR FLOW
DIRECTION
H0551-00
CAUTION: The sampling tube end cap, included with the detector, is critical to
proper operation of the duct smoke detector. The end cap is needed to create
the proper air flow to the sensor of the duct smoke detector. Once any sampling
tube length adjustments are made, plug the end of the sampling tube with the
provided end cap.
A plastic exhaust tube is included with the unit to be installed if needed. Install
into the housing connection that is downstream from the sampling tube connec-
tion. The exhaust tube can be installed from the front or back of the detector.
A longer 1 foot exhaust tube, model ETX, is available as an accessory in cases
where the molded exhaust tube does not extend at least 2 inches into the duct.
[6.2] SAMPLING TUBE INSTALLATION
1. For tubes shorter than the width of the duct, slide the sampling tube,
with installed end cap, into the housing connection that meets the airflow
first. Position the tube so the arrow points into the airflow as shown in
Figure 3. Per NFPA sampling tubes over 3 feet long should be supported at
the end opposite the duct detector. In ducts wider than 8 feet, work must
be performed inside the duct to couple the other section of the sampling
tube to the section already installed using the 1/2inch conduit fitting. Make
sure that the holes on both sections of the air inlet sampling tube are lined
up and facing into the airflow.
2. For tubes longer than the width of the duct, the tube should extend out
of the opposite side of the duct. Drill a 3/4inch hole in the duct opposite
the hole already cut for the sampling tube. Ensure that the sampling tube
is angled downward from the duct smoke detector to allow for 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 width of
the duct. If there are more than 2 holes in the section of the tube extending
out of the duct, select a shorter tube using Table 1. Otherwise, trim the
tube to leave approximately 1 to 2 inches extending outside the duct. Plug
the end with the end cap and tape closed any holes in the protruding sec-
tion of tube. Be sure to seal the duct where the tube protrudes.
FIGURE 4.
DETECTOR
3/4˝
HOLE
12˝
1/4˝
2˝
H0215-00
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 sampling
tube to the other side of the duct. When using the flange/connector mounting
technique, drill a 1 to 1
1/4inch hole where the flange will be used.
[6.3] MODIFICATIONS OF SAMPLING TUBES
There may be applications where duct widths are not what is specified for the
installation. In such cases, it is permissible to modify a sampling tube that is
longer than necessary to span the duct width.
Use a 0.193 inch diameter (#10) drill and add the appropriate number of holes
so that the total number of holes exposed to the air flow in the duct is 10 to 12.
Space the additional holes as evenly as possible over the length of the tube.
NOTE: This procedure should only be used as a temporary fix and is not in-
tended as a substitute for ordering the correct length tubes.
[6.4] REMOTE SAMPLING TUBE INSTALLATION
The detector arrangement can also incorporate remote mounting of the sam-
pling tube and/or exhaust tube. In this case both the detector, sampling tube
and exhaust tube (if included) should be rigidly mounted to withstand the pres-
sure 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 cross section
area.
The pressure differential across the sampling and exhaust ports in the detector
housing shall be verified to be between 0.01 and 1.11 inches of water. Do so
by measuring the pressure difference between the inlet and outlet ports on the
detector housing using a manometer as described in Section 7.1.
[7] MEASUREMENT TESTS
[7.1] AIR FLOW
The DSD240 is designed to operate over an extended air speed range of 100
to 4000 FPM. To verify sufficient sampling of ducted air, turn the air handler
on and use a manometer to measure the differential pressure between the two
sampling tubes. The differential pressure should measure at least 0.01 inches of
water and no more than 1.11 inches of water. Because most commercially avail-
able manometers cannot accurately measure very low pressure differentials, ap-
plications with less than 500 FPM of air speed may require one of the following:
1) the use of a current-sourcing pressure transmitter (Dwyer Series 607) per
Section 7.2, or 2) the use of aerosol smoke per section 11.4.2.
[7.2] 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 least
100 FPM. Wire the Dwyer transmitter as shown in Figure 5. Connect the leads
of the meter to either side of the 1000Ωresistor. 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 1000Ωresistor (measurement 1), 4.00
volts is typical. Using flexible tubing and rubber stoppers, connect the HIGH
side of the transmitter to the sampling tube of the duct smoke detector hous-
ing, and the LOW side of the transmitter to the exhaust tube of the duct smoke
detector housing. Measure and record the voltage drop across the 1000Ωresistor
(measurement 2). Subtract the voltage recorded in measurement 1 from the
voltage recorded in measurement 2. If the difference is greater than 0.15 volts,
there is enough air flow through the duct smoke detector for proper operation.
IN-GE-DSD240-01-01 3 I56-9200-001
5/6/2019

[8] FIELD WIRING INSTALLATION GUIDELINES
All wiring must be installed in compliance with the National Electrical Code
and the local codes having jurisdiction. Proper wire gauges should be used. The
conductors used to connect smoke detectors to control panels and accessory de-
vices should be color-coded to prevent wiring mistakes. Improper connections
can prevent a system from responding properly in the event of a fire.
For signal wiring, (wiring between interconnected detectors or from detectors to
auxiliary devices), it is recommended that single conductor wire be no smaller
than 18 AWG (0.82 mm²).
Smoke detectors and alarm system control panels have specifications for al-
lowable loop resistance. Consult the control panel manufacturer’s specifications
for the total loop resistance allowed for the particular control panel being used
before wiring the detector loop.
[8.1] WIRING INSTRUCTIONS
The DSD240 detector is designed for easy wiring. The housing provides a termi-
nal strip with clamping plates. See Figure 6 on page 4 for system wiring.
*Trouble is indicated when the Supervisory Relay, switches state-Terminals
3 and 14 are open in a Trouble Condition
Causes of a Trouble Condition may be:
• Unit loses Power
• Cover Tamper Feature times out
• When in “Standby” mode, the product goes into “Cover Tamper Violation”
if the cover has been removed or improperly replaced and remains so for
at least 7 minutes. As soon as the cover is properly reseated, the product
reverts to “Standby” automatically.
HIGH LOW
9 VOLT
BATTERY
9 VOLT
BATTERY
9 VOLT
BATTERY
TO SAMPLING TUBE
TO EXHAUST TUBE
DIFFERENTIAL
PRESSURE
TRANSMITTER
MODEL #607-01
15 TO 36
VDC SUPPLY
1000 OHM 5%
1 WATT RESISTOR
VOLT METER FLUKE
MODEL 87 OR
EQUIVALENT
+–
FIGURE 5. PROCEDURE FOR VERIFYING AIR FLOW LESS THAN 500 FPM:
H0163-01
FIGURE 6. SYSTEM WIRING DIAGRAM FOR 4-WIRE DUCT SMOKE DETECTORS:
CAUTION
Do not loop wire under terminals when wiring detectors. Break wire runs to provide system supervision of connections.
24VAC/DC
9 10
AUXILIARY CONTACTS
FOR FAN SHUTDOWN, ETC. (NOTE 2)
16 6178187
N.O.
C.
N.C.
N.O.
C.
N.C.
16 6178 18 7
N.O.
C.
N.C.
N.O.
C.
N.C.
SUPERVISORY CONTACTS
(NOTE 3)
24V
9 10
AUXILIARY CONTACTS
FOR FAN SHUTDOWN, ETC. (NOTE 2)
SUPERVISORY CONTACTS
(NOTE 3)
SUP N.O. SUP C SUP C
SUP N.O.
4
5
ALARM
INITIATION
CONTACTS
(NOTE 4)
4
5
ALARM
INITIATION
CONTACTS
(NOTE 4)
ALARM
INITIATION
LOOP
UL/FM LISTED
4-WIRE
CONTROL PANEL
+
240
VAC
240
VAC
OR OR
AUX A AUX B
AUX A AUX B
ALARM N.O.ALARM N.O.
ALARM C
ALARM C
33
14 14
FIRST DETECTOR IN THE LOOP
POWER INPUTS (NOTE 1) POWER INPUTS (NOTE 1)
LAST DETECTOR IN THE LOOP
EOL RESISTOR
SPECIFIED BY
PANEL
MANUFACTURER
NOTE 1: 24V Power Inputs accept 24VDC of either polarity or 24VAC 50-60Hz.
120VAC Power Inputs accept only 120VAC 50-60Hz. Connect power source to
appropriate terminals of each detector. See specifications for additional power
supply information.
NOTE 2: Auxiliary contacts shown in standby position. Contacts switch during
alarm as indicated by arrows. Auxiliary contacts are not to be used for connec-
tion to the control panel. See specifications for contact ratings.
H0558-12
NOTE 3: Supervisory contacts shown in standby position. Open contacts indi-
cate a trouble condition to the panel. See specifications for contact ratings.
NOTE 4: Alarm Initiation contacts shown in standby position. Closed contacts
indicate an alarm condition to the panel. See specifications for contact ratings.
IN-GE-DSD240-01-01 4 I56-9200-001
5/6/2019

ALARM TEST
OPTIONS
TEST METHOD DETECTOR RESET
Test/Reset
Button
Press and hold test/reset button
for at least 7 seconds
Press and release the
test/reset button
Magnet Test
(M02-04-00)
Place magnet on sensor cover in
designated location for 5 seconds
Press and release the
test/reset button
Remote Test
Accessory
Red LED on sensor and acces-
sory will latch on: verify control
panel alarm status and execu-
tion of all intended auxiliary
functions (i.e. fan shutdown,
damper control, etc.)
Reset at accessory, at
system control panel,
quick press and release
the test/reset button
Smoke Test
Port
1. Put detector into Speed-Up
Test mode
Press and release the
test/reset button
a. Press and hold Test/Reset but-
ton for 2 to 7 seconds
b. When in Speed-Up Test mode
sensor LEDs will alternately
flash Red and Green
2. Lift tethered plug sealing the
smoke test port via pull tab
3. Spray canned smoke into the
test port
4. After test complete, tethered
plug MUST be reinserted
TABLE 2.
FIGURE 7. MULTIPLE FAN SHUTDOWN
(INTERCONNECTION OF DSD240’S):
DETECTOR 1
240 VAC DSD240 DSD240
C, AUX A
NC, AUX A
30
DET.
MAX.
INT/AUX–
INT+
SYSTEM CONTROL
POWER, FAN
CONTROL OR
THERMOSTAT
SYSTEM CONTROL
POWER, FAN
CONTROL OR
THERMOSTAT
12
1
–
+
2
11
15
20
19
9
10
16
6
5
13
3
14
17
8
18
7
4
DETECTOR 2
240 VAC
C, AUX A
NC, AUX A
INT/AUX–
INT+
12
1
–
+
2
11
15
20
19
9
10
16
6
5
13
3
14
17
8
18
7
4
[9] DETECTOR STATUS INDICATION
Detector Status is indicated by the sensor LEDs. Refer to Table 3 on page 7 for
more details.
Note: The power board contains a diagnostic status indicator LED. However,
this LED is not visible under normal operating circumstances.
[10] INTERCONNECTION (MULTIPLE FAN SHUT DOWN)
When using the interconnect feature, an alarm from an initiating device will
switch the Aux Relays on the other devices interconnected.
[10.1] IMPORTANT INTERCONNECTION NOTES:
• When using the interconnect feature, all interconnected units must be
powered using the same independent supply.
• Polarity must be maintained throughout the interconnect wiring. Connect
the INT+ terminal on unit 1 to the INT+ terminal on unit 2 and so on.
Similarly, connect the INT/AUX- terminal on unit 1 to the INT/AUX- ter-
minal on unit 2 and so on.
• Up to 30 DSD240 units may be interconnected.
NOTE: Alarm can be reset only at the initiating device and not at the devices
interconnected.
[11] VERIFICATION OF OPERATION
[11.1] POWERING THE UNIT
Apply 24 VDC power to 9 and 10 terminals on the power board or apply 240
VAC on terminals named 240VAC. See Figure 7 and electrical specifications for
details.
[11.2] PERFORM DETECTOR CHECK
VERIFY STANDBY AND TROUBLE TEST per Table 3 on page 7. The use of a
remote accessory for visible indication of power and alarm is recommended.
[11.3] SENSITIVITY VERIFICATION
The sensitivity of the sensor is confirmed to be operating within its allowable
range each time the sensor LEDs blink green every 5 seconds. Note in a main-
tenance condition, the sensor LEDs will blink red every 5 seconds as depicted
in Table 3 on page 7. The maintenance condition indicates that the sensor is
operating outside its original factory preset sensitivity and shall be cleaned or
replaced. Replacement 2D51 sensors are available as a separate item. See Sec-
tion 9 for reference. This is a valid UL test.
[11.4] DETECTOR TESTING AND MAINTENANCE PROCEDURES
Notify the proper authorities that the smoke detector system is undergoing
maintenance, and that the system will temporarily be out of service. Disable the
zone or system undergoing maintenance to prevent unwanted alarms and pos-
sible dispatch of the fire department.
[11.4.1] SMOKE RESPONSE TESTS
Option 1: Utilize smoke test port as described in Table 2.
Option 2: 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 cotton wick, or punk directly at the head to cause an alarm.
REMEMBER TO REMOVE THE PLUGS AFTER THIS TEST, OR THE DETECTOR
WILL NOT FUNCTION PROPERLY.
H0639-01GS
[11.4.2] SMOKE ENTRY USING AEROSOL SMOKE
This test is intended for low-flow systems (100-500 FPM). If the air speed is
greater than 500 FPM, use a conventional manometer to measure differential
pressure between the sampling tubes, as described in Section 7.1.
Drill a 1/4inch hole 3 feet upstream from the duct smoke detector. With the air
handler on, measure the air velocity with an anemometer. Air speed must be
at least 100 FPM. Spray aerosol smoke* into the duct through the 1/4inch hole
for five seconds. Wait two minutes for the duct smoke detector to alarm. If the
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
chamber and reset the duct smoke detector. Use duct tape to seal the aerosol
smoke entry hole.
*Aerosol smoke can be purchased from Home Safeguard Industries at home-
safeguard.com, model 25S Smoke Detector Tester, and Chekkit Smoke Detector
Tester model CHEK02 and CHEK06 available from SDi. When used properly,
the canned smoke agent will cause the smoke detector to go into alarm. Re-
fer to the manufacturer’s published instructions for proper use of the canned
smoke agent.
CAUTION
Canned aerosol simulated smoke (canned smoke agent) formulas will vary by
manufacturer. Misuse or overuse to these products may have long term ad-
verse effects on the smoke detector. Consult the canned smoke agent manufac-
turer’s published instructions for any further warnings or caution statements.
[11.5] INSTALL THE COVER
Install the covers making sure that the cover fits into the base groove. Tighten
the seven screws that are captured in the covers.
[11.6] DUCT CLEARING
After an ALARM event occurs, the unit may be reset by pressing the RESET
pushbutton. If the duct is not clear of smoke, the AUX relay will open for 20
seconds, to allow the fans to run and clear the duct of smoke. If the smoke
has cleared the unit will go into STANDBY, otherwise the unit will remain in
ALARM.
IN-GE-DSD240-01-01 5 I56-9200-001
5/6/2019

10
9
19
20
1
12
15
3
2
1
DSD240
APA151
(GREEN LED) POWER
FIELD
INSTALLED
JUMPER
11
2
+
–
AUX OUT +
AUX OUT –
ALARM
R TEST
ACC +
ACC –
R RESET
7
18
8
17
6
16
14
3
13
5
4
SUP, NO
SUP, C
NOTE: WIRING DIAGRAM SHOWN IS FOR DUCTSD 4-WIRE DUCT
SMOKE DETECTOR SYSTEM EQUIPPED WITHOUT A CONTROL PANEL.
NOTE: A TROUBLE CONDITION IS INDICATED
BY LOSS OF GREEN LED
COMMON
(RED LED) ALARM
H0642-01GX
10
9
19
20
1
12
15
2
6
1
5
4
3
DSD240
RTS151/RTS151KEY
(GREEN LED)
POWER
(RED LED)
ALARM
FIELD
INSTALLED
JUMPER
11
2
+
–
AUX OUT +
AUX OUT –
ALARM
R TEST
ACC +
ACC –
R RESET
7
18
8
17
6
16
14
3
13
5
4
SUP, NO
SUP, C
FOR RTS151KEY ONLY WITHOUT A CONTROL PANEL
FIELD
INSTALLED
JUMPERS
H0643-01GX
FIGURE 10. WIRING DIAGRAMS FOR OPTIONAL ACCESSORIES:
[12] DETECTOR CLEANING PROCEDURES
Notify the proper authorities that the smoke detector system is undergoing
maintenance, and that the system will temporarily be out of service. Disable the
zone or system undergoing maintenance to prevent unwanted alarms and pos-
sible dispatch of the fire department.
[12.1] DETECTOR SENSOR
1. Remove the sensor to be cleaned from the system.
2. Remove the sensor cover by pulling outward on each of the four removal
tabs that hold the cover in place. See Figure 9.
3. Vacuum the screen carefully without removing it. If further cleaning is
required continue with Step 4, otherwise skip to Step 7.
4. Remove the chamber cover/screen assembly by pulling it straight out.
5. Use a vacuum cleaner or compressed air to remove dust and debris from
the sensing chamber.
6. Reinstall the chamber cover/screen assembly by sliding the edge over the
sensing chamber. Turn until it is firmly in place.
7. Replace the cover using the holes for the LEDs for alignment and then
gently pushing it until it locks into place.
8. Reinstall the detector.
FIGURE 9. DETECTOR SENSOR EXPLODED VIEW:
SENSOR
COVER
SENSING
CHAMBER
COVER AND
SCREEN
SENSOR
CHAMBER
COVER
REMOVAL
TABS
C1009-00
[12.2] REINSTALLATION
1. Reinstall the detector in its housing.
2. Restore system power.
3. Perform Detector Check, Section 11.2.
4. Notify the proper authorities testing has been completed and the smoke
detector system is back in operation.
NOTICE: If any unitary packaged air conditioning units are run during the
drywall installation phase of any building under construction to accelerate the
drying of joint compound, the subsequent sanding of those drywall joints and
resulting dust may compromise the sensor heads in duct smoke detectors. To
avoid this condition it is recommended that the sensor heads be removed during
the construction phase.
[13] SENSOR REPLACEMENT (PART NO. 2D51)
1. Remove the sensor head by rotating counterclockwise.
2. Pull gently to remove it.
3. To replace the sensor head, align the mounting features and rotate clock-
wise into place.
[14] OPTIONAL ACCESSORIES
[14.1] RTS151/RTS151KEY REMOTE TEST STATION
The RTS151/RTS151KEY Remote Test Station facilitates test of the alarm capabil-
ity of the duct smoke detector as indicated in the RTS151/RTS151KEY manual.
The DSD240 duct smoke detector can be reset by the RTS151/RTS151KEY. To
install the RTS151/RTS151KEY, connect the device as shown in Figure 12; wire
runs must be limited to 25 ohms or less per interconnecting wire. If a system
control panel is used, the panel itself may require testing.
ALARM
AUX OUT –
15
20
(+)
(–)
ALARM
AUX OUT –
15
20
(+)
(–) RED
MHR/MHW
(OPTIONAL) AUDIO
ALERT
DSD240
DUCT DETECTOR
DSD240
DUCT DETECTOR
RA400Z(OPTIONAL)
REMOTE (LED)
ANNUNCIATOR
H0641-01GX
FIGURE 11. WIRING DIAGRAM FOR DSD240 TO APA151:
FIGURE 12. WIRING DIAGRAM FOR DSD240 TO RTS151/RTS151KEY:
IN-GE-DSD240-01-01 6 I56-9200-001
5/6/2019

TABLE 3. DETECTOR STATUS INDICATION
NOTE: Power Board LED is not visible unless the power board cover is removed. If any other visual indication is noted contact technical support at 1-506-853-3057.
DETECTOR
STAT E
SENSOR LED POWER BOARD LED COMMENTS RELAY STATES
Power Up Red Blink every 5
seconds
Alternating Green/
Amber Blink every 1
second
Initialization completes in
approximately 30 sec
Supervisory relay: Terminals 3 and 14 are closed.
Alarm Relay: Terminals 4 and 5 are open
Aux Relay does not switch states: Terminals 6 and 16
are closed; Terminals 8 and 18 are closed
Standby Green Blink every 5
seconds
Green Blink every 5
seconds
Supervisory relay: Terminals 3 and 14 are closed.
Alarm Relay: Terminals 4 and 5 are open
Aux Relay does not switch states: Terminals 6 and 16
are closed; Terminals 8 and 18 are closed
Maintenance Red Blink every 5
seconds
Amber Blink every 5
seconds
The 2D51 sensor is outside it’s
UL approved sensitvity limits and
needs to be cleaned or replaced.
Supervisory relay: Terminals 3 and 14 are closed.
Alarm Relay: Terminals 4 and 5 are open
Aux Relay does not switch states: Terminals 6 and 16
are closed; Terminals 8 and 18 are closed
Speed-Up Alternating Red/
Green Blink every 0.5
seconds
Green Blink every 0.5
seconds
Alternating red /green blink
pattern exists until unit either
enters Alarm or reverts to
Standby (within approximately 60
seconds).
Supervisory relay: Terminals 3 and 14 are closed.
Alarm Relay: Terminals 4 and 5 are open
Aux Relay does not switch states: Terminals 6 and 16
are closed; Terminals 8 and 18 are closed
Trouble Red Blink every 5
seconds
Amber Solid Supervisory relay: Terminals 3 and 14 are open.
Alarm Relay: Terminals 4 and 5 are open
Aux Relay does not switch states
Cover Tamper
Violation
Red Blink every 5
seconds
Amber Solid When in “Standby” mode,
the product goes into “Cover
Tamper Violation” if the cover
has been removed or improperly
replaced and remains so for at
least 7 minutes. As soon as the
cover is properly reseated, the
product reverts to “Standby”
automatically.
Supervisory relay: Terminals 3 and 14 are open.
Alarm Relay: Terminals 4 and 5 are open.
Aux Relay does not switch states
Communication
Error
Off Amber Solid Sensor LED state cannot be
guaranteed since there is a
communication error.
Supervisory relay: Terminals 3 and 14 are open.
Alarm Relay: Terminals 4 and 5 are open
Aux Relay does not switch states
Alarm Red Solid Red Solid Supervisory relay: Terminals 3 and 14 are closed
Alarm Relay: Terminals 4 and 5 are closed
Aux Relay switches states: Terminals 6 and 16 are
open; Terminals 8 and 18 are open
Unit Loses
Power
Off Off Supervisory relay: Terminals 3 and 14 are open.
Alarm Relay: Terminals 4 and 5 are open
Aux Relay does not switch states
IN-GE-DSD240-01-01 7 I56-9200-001
5/6/2019

THREE-YEAR LIMITED WARRANTY
Greystone Energy warrants its enclosed product to be free from defects in materials and
workmanship under normal use and service for a period of three years from date of
manufacture. Greystone Energy makes no other express warranty for the enclosed prod-
uct. No agent, representative, dealer, or employee of the Company has the authority to
increase or alter the obligations or limitations of this Warranty. The Company’s obligation
of this Warranty shall be limited to the replacement of any part of the product which is
found to be defective in materials or workmanship under normal use and service during
the three year period commencing with the date of manufacture. After phoning Greystone
Energy at 1-506-853-3057 for a Return Authorization number, send defective units post-
age prepaid to: 150 English Drive, Moncton, N.B. Canada E1E 4G7. Please include a note
describing the malfunction and suspected cause of failure. The Company shall not be
obligated to replace units which are found to be defective because of damage, unreason-
able use, modifications, or alterations occurring after the date of manufacture. In no case
shall the Company be liable for any consequential or incidental damages for breach of
this or any other Warranty, expressed or implied whatsoever, even if the loss or damage
is caused by the Company’s negligence or fault. Some states do not allow the exclusion
or limitation of incidental or consequential damages, so the above limitation or exclusion
may not apply to you. This Warranty gives you specific legal rights, and you may also
have other rights which vary from state to state.
Please refer to insert for the Limitations of Fire Alarm Systems
IN-GE-DSD240-01-01 8 I56-9200-001
©2019 Greystone Energy. 5/6/2019