System Sensor Smoke Alarm DH400ACDCP User Manual

INSTALLATION AND MAINTENANCE INSTRUCTIONS  
3825 Ohio Avenue, St. Charles, Illinois 60174  
1-800-SENSOR2, FAX: 630-377-6495  
DH400ACDCP Air Duct Smoke Detector  
Before Installing  
[1] General Description  
Please thoroughly read the System Sensor Guide for  
Proper Use of Smoke Detectors in Duct Applications  
(A05-1004), which provides detailed information on de-  
tector spacing, placement, zoning, wiring, and special  
applications. Copies of this manual are available online  
fax-back service, Documents on Demand at 800/736-7672.  
NFPA Standards 72 and 90A should also be referenced for  
detailed information.  
An HVAC system supplies conditioned air to virtually ev-  
ery area of a building. Smoke introduced into this air duct  
system will be 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.  
Model DH400ACDCP Air Duct Smoke Detector utilizes  
photoelectric technology for the detection of smoke. This  
smoke detection method, when combined with an efficient  
housing design, samples air passing through the duct and  
allows detection of a developing hazardous condition.  
When sufficient smoke is sensed, an alarm signal is initi-  
ated at the fire control panel monitoring the detector, and  
appropriate action can be taken to shut off fans and blow-  
ers, change over air handling systems, etc. These actions  
can facilitate the management of toxic smoke and fire gases  
throughout the areas served by the duct system.  
NOTICE: This manual should 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.  
Table of Contents  
[1] General Description  
Page  
1
DH400ACDCP detectors are designed to operate from 24  
VDC, 24 VAC, 120 VAC, or 240 VAC. Alarm and supervisory  
relay contacts are available for control panel interface  
(alarm initiation), HVAC control, and other auxiliary func-  
tions. These detectors are not designed for 2-wire appli-  
cation.  
[2] Exploded View of Duct Detector Components  
[3] Contents of the Duct Detector Kit  
[4] Limitations of Duct Detectors  
[5] Installation Sequence  
[6] Duct Detector Maintenance and Test Procedures  
[7] Detector Cleaning Procedures  
[8] Specifications  
2
2
2
2
8
10  
12  
13  
16  
For testing, the alarm can be enabled by a magnet activated  
test switch, by insertion of a calibrated test card into the  
sensing chamber (photoelectronic version only), or by the  
optional remote test station. The duct smoke detectors latch  
into alarm state when alarm occurs. LEDs on each detector  
illuminate to provide local alarm indication, and optional  
accessories offer a variety of annunciation capabilities.  
Warranty  
Detector Test log  
List of Tables and Figures  
Page  
Fig. 1: Duct Detector Exploded View  
Fig. 2: Installation of Sampling Tube Gaskets  
Fig. 3: Mounting Location of Speed Nuts  
Table 1: Inlet Sampling Tube Selection  
Fig. 4: Inlet Sampling Tube  
2
3
3
3
4
The detector can be reset by a momentary power inter-  
ruption, by the magnet activated reset switch, or by the  
optional remote test station.  
Fig. 5: Sampling Tube Mounting Configurations  
Fig. 6: Wiring Diagram  
4
6
Fig. 7: Wiring Diagram – No Control Panel  
Fig. 8: Wiring Diagram – Accessories  
Fig. 9: Sampling Tube Filter Installation  
Fig. 10: Testing Detector Alarm  
7
8
8
9
Fig. 11: Detector Head Removal  
9
Fig. 12: RTS451/RTS451KEY Test Coil Installation  
Fig. 13: Photo Head Exploded View  
10  
11  
D400-13-00  
1
I56-555-09R  
 
feet per minute. Be sure to check engineering specifications [5.4] Install The Inlet  
to ensure that the air velocity in the duct falls within these The inlet tube (shown in Figure 4) is identified by a series  
parameters. If necessary, use a velocity meter to check the of air inlet holes on the tube. This tube must be purchased  
air velocity in the duct.  
separately. Order the correct length, as specified in Table 1,  
for width of the duct where it will be installed. The exhaust  
tube is molded into the base of the duct housing, and the  
[5.2] Drill The Mounting Holes  
Remove the paper backing from the mounting template A2440-00 Exhaust Tube Extension is available as an ac-  
supplied. Affix the template to the duct at the desired cessory in those cases where the molded exhaust port does  
mounting location. Make sure the template lies flat and not extend at least 2 inches into the duct.  
smooth on the duct. Center punch holes A and B. Drill the  
holes as indicated on the template. Slide the two speed nuts The inlet tube is always installed in the centermost hous-  
over the two small holes (hole A) next to the sampling tube ing bushing, with air inlet holes facing into the air flow.  
bushing holes (hole B) previously drilled in the duct. (See To assist proper installation, the tube’s mounting flange is  
Figure 3.)  
marked with arrows. Make sure the inlet tube is mounted  
so that the arrows point into the air flow. Figure 5 shows  
the various combinations of tube mounting configurations  
[5.3] Secure The Detector Housing To The Duct  
Remove the duct housing cover. Slide the foam gaskets over with respect to air flow.  
the tube bushings as shown in Figure 2. Make sure the two  
small holes in the gaskets line up with the two base mount- Mounting the detector housing in a vertical orientation is  
ing holes. Put one 5/16-inch O-ring over each of the two acceptable, provided that the air flows directly into the  
#10 sheet metal screws. Use the two sheet metal screws to sampling tube holes as indicated in Figure 4.  
screw the detector housing to the duct. CAUTION: Do not  
overtighten the screws.  
Table 1. Inlet tubes required for different duct  
widths:  
Figure 2. Installation of foam gaskets over sampling  
tube bushings:  
Outside Duct Width  
1 to 2 ft.  
Inlet Tube Required  
ST-1.5  
ST-3  
ST-5  
2 to 4 ft.  
4 to 8 ft.  
8 to 12 ft.  
DUCT DETECTOR  
HOUSING  
INLET SAMPLING  
TUBE BUSHING  
MOUNTING  
SCREWS  
ST-10  
EXHAUST TUBE  
(EXTENSION BUSHING)  
O-RINGS  
FOAM GASKETS  
SCREW HOLES FOR ATTACHING  
DETECTOR HOUSING TO DUCT  
H0238-00  
Figure 3. Speed nut mounting location:  
HOLE B  
HOLE A  
DUCT  
WALL  
SPEED  
NUT  
H0116-00  
D400-13-00  
3
I56-555-09R  
 
Figure 4. Air duct detector inlet sampling tube:  
AIR HOLES  
FLANGE  
INLET  
TUBE  
END  
PLUG  
ARROWS  
MUST FACE  
INTO AIR FLOW  
AIR FLOW DIRECTION  
H0108-00  
Figure 5. Tube mounting configurations with varying air flow direction:  
DOTS INDICATE POSITION OF  
SAMPLING TUBE HOLES  
AIR FLOW  
DIRECTION  
AIR FLOW  
DIRECTION  
DETECTOR  
HOUSING  
DETECTOR  
HOUSING  
B.  
A.  
INLET  
TUBE  
EXHAUST  
TUBE  
EXHAUST  
TUBE  
INLET  
TUBE  
HORIZONTAL MOUNTING OF HOUSING  
EXHAUST  
TUBE  
DETECTOR  
HOUSING  
EXHAUST  
TUBE  
AIR FLOW  
DIRECTION  
AIR FLOW  
DIRECTION  
INLET  
INLET  
TUBE  
TUBE  
C.  
DETECTOR  
HOUSING  
D.  
H0109-00  
VERTICAL MOUNTING OF HOUSING  
[5.4.1] Installation For Ducts Less Than 8 Feet Wide  
1. If the tube is longer than the width of the air duct, drill  
a 3/4-inch hole in the duct directly opposite the hole  
already cut for the inlet tube. If the tube is shorter than  
the width of the air duct, install the end plug into the  
outside the duct. Plug this end with the end plug and  
tape closed any holes in the protruding section of the  
tube. Be sure to seal the duct when the tube protrudes.  
WARNING  
inlet tube as shown in Figure 4. Sampling tubes over 3 In no case should more than 2 air inlet holes be cut off the  
ft. long must be supported at the end opposite the duct tube. There must be a minimum of 10 holes in the tube ex-  
detector.  
posed to the air stream.  
2. Slide the tube into the centermost housing bushing. Po-  
sition the tube so that the arrows point into the air flow. [5.4.2] Installation For Ducts More Than 8 Feet Wide  
3. Secure the tube flange to the housing bushing with two NOTE: To install inlet tubes in ducts more than 8 feet  
#6 self-tapping screws.  
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 inlet sampling  
tube. If the tube is shorter than the width of the  
air duct, install the end plug into the inlet tube as  
shown in Figure 4 and support the end opposite  
the duct detector.  
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 inches of the tube extend  
D400-13-00  
4
I56-555-09R  
 
[5.5] Field Wiring  
Install the inlet tube as follows:  
Installation Guidelines  
1. Drill a 3/4-inch hole in the duct directly opposite the All wiring must be installed in compliance with the National  
hole already drilled for the inlet tube. Electrical Code and the local codes having jurisdiction.  
2. Slide the inlet tube with the flange into the centermost Proper wire gauges should be used. The conductors used  
housing bushing. Position the tube so that the arrows to connect smoke detectors to control panels and accessory  
point into the air flow. Secure the tube flange to the devices should be color-coded to reduce the likelihood of  
housing bushing with two #6 self-tapping screws.  
wiring errors. Improper connections can prevent a system  
3. From inside the duct, couple the other section of the from responding properly in the event of a fire.  
inlet tube to the section already installed using the 1/2-  
inch conduit fitting supplied. Make sure that the holes For signal wiring, (the wiring between interconnected de-  
on both of the air inlet tubes are lined up and facing into tectors or from detectors to auxiliary devices), it is usually  
the air flow.  
recommended that single-conductor wire be no smaller  
4. Trim the end of the tube protruding through the duct so than 18 gauge. The duct detector terminals accommodate  
that 1 to 2 inches of the tube extend outside the duct. wire sizes up to 14 gauge. The last foot of conduit should  
Plug this end with the end plug and tape closed any be flexible steel conduit (available in electrical supply  
holes in the protruding section of the tube. Be sure to houses), which facilitates installation and puts less strain  
seal the duct when the tube protrudes.  
on the conduit holes in the housing. Solid conduit connec-  
tions may be used, if desired.  
NOTE: An alternate method to using the ST-10 is to use  
two ST-5 inlet tubes. Remove the flange from one Smoke detectors and alarm system control panels have  
of the tubes and install as described above. After specifications for allowable loop resistance. Consult the  
the installation, use electrical tape to close off control panel manufacturer’s specifications for the total  
some of the sampling holes so that there is a to- loop resistance allowed for the particular model control  
tal of 10 to 12 holes spaced as evenly as possible panel being used before wiring the detector loop.  
across the width of the duct.  
Wiring Instructions  
Air currents inside the duct may cause excessive vibration, The DH400ACDCP detectors are designed for easy wiring.  
especially when the longer sampling tubes are used. In The housing provides a terminal strip with clamping plates.  
these cases a 3 inch floor flange (available at most plumb- Wiring connections are made by stripping about 3/8-inch  
ing supply stores) may be used to fasten the sampling tube of insulation from the end of the wire, sliding the bare end  
to the other side of the duct. When using the flange/con- under the plate, and tightening the clamping plate screw.  
nector mounting technique, drill a 1 inch to 1-1/4-inch hole  
where the flange will be used.  
The DH400ACDCP duct detector is designed to operate  
from 24 VDC, 24 VAC, 120 VAC, or 240 VAC.  
[5.4.3] Modifications Of Inlet Sampling Tubes  
There may be applications where duct widths are not what The detector may be wired for interconnection to UL listed  
is specified for the installation. In such cases, it is permis- control panels, or for stand alone service per NFPA 90A.  
sible to modify an inlet sampling tube that is longer than Refer to the wiring diagrams of Figures 6, 7, and 8 to select  
necessary to span the duct width.  
the appropriate circuit for your application.  
Use a 0.193-inch diameter (#11) drill and add the appro-  
priate 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.  
D400-13-00  
5
I56-555-09R  
 
Figure 6. System wiring diagram for duct detectors using a UL listed control panel (see Figure 8 for wiring of  
optional accessories):  
CAUTION  
Do not loop wire under terminals when wiring detectors. Break wire runs to provide system supervision of connections.  
H0252-00  
D400-13-00  
6
I56-555-09R  
 
Figure 7. Wiring diagram for duct detector systems equipped without a control panel (see Figure 8 for wiring  
of additional optional accessories):  
AVAILABLE POWER INPUTS  
POWER INPUTS ACCEPT  
24 VDC, 24 VAC 50-60 HZ,  
120 VAC 50-60 HZ, OR  
1
2
12  
13  
14  
SEE SPECIFICATIONS FOR  
ADDITIONAL POWER  
SUPPLY INFORMATION.  
220/240 VAC 50-60 HZ.  
CONNECT POWER SOURCE  
TO APPROPRIATE TERMINALS  
OF EACH DETECTOR.  
120  
VAC  
24V  
220/240  
VAC  
ALARM AUXILIARY CONTACT RATINGS  
10A @ 30 VDC  
ALARM AUXILIARY CONTACTS  
FOR FAN SHUTDOWN, ETC.  
10A @ 250 VAC  
15  
16  
17  
18  
19  
20  
500mA MINIMUM @ 24 VDC  
NOT INTENDED FOR CONNECTION  
TO CONTROL PANELS.  
FOR WIRING OF AUXILIARY  
DEVICES, REFER TO  
N.C.  
C.  
N.O.  
N.O.  
C.  
N.C.  
MANUFACTURER’S  
INSTALLATION INSTRUCTIONS  
OR CONTACT MANUFACTURER.  
ALARM AUXILIARY CONTACTS SHOWN IN  
STANDBY. CONTACTS TRANSFER DURING  
ALARM AS INDICATED BY THE ARROWS.  
ALARM INITIATION CONTACTS  
ALARM INITIATION CONTACT RATING  
2.0A @ 30 VAC/DC (0.6 POWER FACTOR)  
9
8
N.O.  
TROUBLE CONTACTS CLOSED IN ALARM AND STANDBY.  
CONTACTS OPEN WHILE DETECTOR HEAD OR POWER IS  
REMOVED, AND DURING RESET. OPEN CONTACTS  
SIGNAL TROUBLE CONDITION TO PANEL.  
5
2
1
ALARM  
(+) ALARM SIGNAL  
6
COMMON  
RED  
(–) AUX POWER  
7
TROUBLE CONTACT RATING  
0.3A @ 32 VAC/DC  
(+) AUX POWER  
FIELD  
INSTALLED  
JUMPER  
10  
TROUBLE CONTACTS CLOSED IN STANDBY AND ALARM.  
CONTACTS OPEN WHILE DETECTOR HEAD OR POWER  
IS REMOVED, AND DURING RESET. OPEN CONTACTS  
EXTINGUISH OPTIONAL APA451 GREEN “POWER” LED  
TO INDICATE TROUBLE CONDITION.  
GRN.  
TROUBLE  
CONTACTS  
11  
3
POWER  
DH400ACDCP  
DUCT DETECTOR  
APA451  
AUDIBLE PIEZO ALERT WITH ALARM AND  
POWER (TROUBLE) LEDS. FOR STAND ALONE  
APPLICATIONS ONLY. APA451 RECOMMENDED  
FOR COMPLIANCE TO NFPA 90A. LOCATE IN  
NORMALLY OCCUPIED AREA OF PREMISES.  
H0253-00  
D400-13-00  
7
I56-555-09R  
 
Figure 8. Wiring diagrams for optional accessories (see Figure 7 for APA451 wiring diagram):  
(+)  
(+)  
5
5
5
6
1
2
ALARM SIGNAL (+)  
AUX POWER (–)  
ALARM SIGNAL (+)  
AUX POWER (–)  
ALARM SIGNAL (+)  
AUX POWER (–)  
R
E
D
RED  
6
(–)  
6
(–)  
4
3
5
FIELD  
INSTALLED  
JUMPER  
3
4
DUCT DETECTOR  
DH400ACDCP  
PA400 (OPTIONAL)  
AUDIBLE ALERT  
DUCT DETECTOR  
DH400ACDCP  
RA400Z (OPTIONAL)  
REMOTE (LED)  
ANNUNCIATOR  
RESET (–)  
TEST (–)  
RESET  
TEST  
ACCESSORY CURRENT LOADS AT 24 VDC  
DEVICE  
APA451  
PA400  
STANDBY ALARM  
12mA MAX 30mA MAX  
DUCT DETECTOR  
DH400ACDCP  
RTS451/RTS451KEY  
(OPTIONAL) REMOTE  
TEST STATION  
0mA  
0mA  
15mA MAX  
10mA MAX  
10mA MAX*  
RA400Z  
RTS451/RTS451KEY 0mA*  
ANY COMBINATION OF ACCESSORIES MAY BE USED SUCH THAT THE GIVEN  
CURRENT LOADS TOTAL:  
100mA OR LESS IN THE STANDBY STATE,  
150mA OR LESS IN THE ALARM STATE.  
*NOTE: WHEN INITIATING AN ALARM, THE RTS451/RTS451KEY REQUIRES 95mA MAXIMUM  
IN PRE-ALARM AND 103mA MAXIMUM IN ALARM. NOMINAL STANDBY  
CURRENT IS 0mA. ALARM CURRENT IS 10mA MAXIMUM WHEN TEST  
MAGNET IS REMOVED.  
H0254-00  
[5.6] Install The Filters  
[5.7] Perform Detector Check  
To install the sampling tube filters, simply push the filter 1. Perform the STANDBY AND TROUBLE TEST per Section  
adapter into the exhaust tube, and push the filter onto the [6.2.1].  
adapter tube on the left, as shown in Figure 9. Install the 2. Perform the MAGNET TEST per Section [6.2.2.1]. The  
other filter over the end of the inlet sampling tube.  
RTS451 test of Section [6.2.2.2] may substitute for this  
requirement.  
Figure 9. Sampling tube filter installation:  
3. Perform the AIR FLOW TEST per Section [6.1.1].  
4. Perform the SMOKE RESPONSE TEST per Section  
[6.1.2].  
INLET SAMPLING TUBE  
5. Perform the SENSITIVITY TEST per Section [6.2.3].  
6. Record all test results in the Detector Test Log at the end  
of this manual.  
FOAM GASKET  
[5.8] Install The Cover  
SAMPLING TUBE  
MOUNTING  
SCREWS  
Install the cover using the four screws that are fixed in the  
housing cover. Be certain filters are installed as specified  
in Section [5.6]. Make sure that the cover fits into the base  
groove and that all gaskets are in their proper positions.  
Tighten the four screws to 10 in-lbs.  
DETECTOR BASE  
EXHAUST  
FILTER ADAPTER  
DETECTOR HEAD  
SAMPLING TUBE  
[6] Duct Detector Maintenance And Test Procedures  
Test and maintain duct detectors as recommended in NFPA  
72. The tests contained in this manual were devised to  
assist maintenance personnel in verification of proper de-  
tector operation.  
FILTERS  
H0239-00  
CAUTION  
Filters require periodic cleaning or replacement, depending  
on the amount of dust and dirt accumulated. Visually in-  
spect the filters at least quarterly; inspect them more often  
if the dust accumulation warrants it. See Section [6] for  
more information. Replacement filters can be ordered from  
System Sensor, 3825 Ohio Ave., St. Charles, IL 60174. (Ex-  
haust tube/intake tube filter P/N F36-05-00).  
Before conducting these tests, notify the proper authorities  
that the smoke detection system will be temporarily out of  
service. Disable the zone or system under test to prevent  
unwanted alarms.  
After conducting these tests, record the appropriate infor-  
mation in the Detector Test Log at the end of this manual.  
D400-13-00  
8
I56-555-09R  
 
Figure 10. Testing detector alarm:  
Figure 11. Detector head removal:  
DETECTOR  
HEAD  
DETECTOR  
HEAD  
TWIST  
COUNTERCLOCKWISE  
TO REMOVE  
DUCT  
HOUSING  
TEST  
RESET  
LOCATOR  
TEST  
LOCATOR  
MAGNET  
PAINTED SIDE  
TOWARD HOUSING  
DUCT  
HOUSING  
TWIST  
CLOCKWISE  
TO INSTALL  
H0250-00  
H0251-00  
[6.1] Smoke Entry Tests  
[6.1.1] Air Flow  
Trouble- If the detector LEDs do not blink or if the APA451  
Power LED is not illuminated, the detector lacks  
power (check wiring, panel, or power supply),  
the head is missing (install), or the unit is defec-  
tive (return for repair).  
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 0.01 inches of water and no greater than 1.20  
inches of water.  
Test-  
The trouble condition can be caused  
intentionally to verify correct operation of the  
system. Remove power to the unit, remove the  
detector head (see Figure 11), or place the M02-  
04-00 magnet into the Reset locator, as shown in  
Figure 10. These actions should cause a trouble  
condition locally and at the system control  
panel.  
[6.1.2] Smoke Response  
To determine if smoke is capable of entering the sensing  
chamber, visually identify any obstructions. Plug the ex-  
haust and inlet tube holes to prevent ducted air from car-  
rying smoke away from the detector head, then blow smoke  
such as cigarette, cotton wick, or punk directly at the head  
to cause an alarm. REMOVE THE PLUGS AFTER TESTING  
OR THE DETECTOR WILL NOT FUNCTION PROPERLY.  
[6.2.2] Alarm Tests  
[6.2.2.1] M02-04-00 Magnet Test  
1. Place the painted surface of the magnet into the Test  
locator molded into the side of the housing (see Figure  
10).  
[6.1.3] Filter Replacement  
The filters do not substantially affect smoke behavior  
even when they are up to 90% clogged. Quarterly visual  
inspection is usually often enough to determine if filters 2. The red alarm LEDs on the detector should latch on,  
should be replace because only a high percentage of con-  
tamination affects duct detector performance.  
as should any accessories (PA400, RA400Z, RTS451,  
APA451). Verify auxiliary functions (such as fan shut-  
down) and system control panel alarm status.  
[6.2] Standby, Alarm, And Sensitivity Tests  
[6.2.1] Standby And Trouble  
3. Place the painted surface of the magnet into the Reset  
locator molded into the side of the housing (see Figure  
10). This should clear the latched alarm condition at the  
detector. If a system control panel is used, the panel may  
also require resetting.  
Standby- Check for the presence of the blinking red LEDs  
(blinks about every 10 seconds) through the  
transparent housing cover. If the APA451 ac-  
cessory is used, its green Power LED should be  
illuminated continuously.  
[6.2.2.2] RTS451/RTS451KEY Remote Test Station  
The RTS451/RTS451KEY Remote Test Station facilitates test  
of the alarm capability of the duct detector as indicated in  
D400-13-00  
9
I56-555-09R  
 
Figure 12. RTS451/RTS451KEY test coil installation:  
TEST COIL  
DETECTOR  
HEAD  
H0245-00  
the RTS451/RTS451KEY manual. The DH400ACDCP duct  
detector can be reset by the RTS451/RTS451KEY. If a sys-  
tem control panel is used, the panel itself may also require  
resetting.  
ing and wait 50 seconds for power up. Do not hold the  
swirl chamber to twist the detector head.  
5. Insert the NO ALARM end of the test card into the test  
slot (see Figure 13) and slide it counterclockwise until it  
stops. The detector should not alarm after 20 seconds.  
6. Remove the card and then insert the ALARM end into  
the slot and slide it counterclockwise until it stops. The  
LEDs should latch on within 20 seconds. Remove card  
and reset detector.  
7. Put the cover back by gently rotating it clockwise until it  
locks in place. Secure the duct housing cover using the  
4 cover screws.  
To install the RTS451/RTS451KEY, connect the device as  
shown in Figure 8; wire runs must be limited to 25 ohms or  
less per interconnecting wire. Place the coil in the detector  
housing with the arrow facing up and pointing toward the  
detector as in Figure 12. Attach the coil leads to the hous-  
ing terminals as shown; polarity is not important. Firmly  
screw the bracket in place over the test coil.  
[6.2.3] Sensitivity Tests  
[6.2.3.1] MOD400R Sensitivity Test  
After verification of alarm capability, use the MOD400R test  
module with a voltmeter to check detector sensitivity as  
described in the test module’s manual. The housing cover  
must be removed to perform this test.  
[7] Detector Cleaning Procedures  
Notify the proper authorities that the smoke detector sys-  
tem is undergoing maintenance, and that the system will  
be temporarily out of service. Disable the zone or system  
undergoing maintenance to prevent unwanted alarms and  
possible dispatch of the fire department.  
If test module readings indicate that the detector head is  
outside of the acceptable range that is printed on the back  
of the detector head, the detector head requires cleaning  
per Section [7].  
[7.1] Air Filters  
1. Turn off power to the system.  
2. Remove and inspect the sampling tube filters.  
3. If the filters are heavily coated with dirt, replace them  
with new filters. If they are not heavily coated, use a  
vacuum cleaner or compressed air nozzle to remove  
dust, then reinstall the filters.  
[6.2.3.2] R59-18-00 CALIBRATED TEST CARD (photo-  
electronic units only)  
After verification of alarm capability, the R59-18-00 test  
card may be used to verify correct sensitivity of the de-  
tector head.  
1. Remove the duct housing cover.  
2. Remove the detector head from the housing as shown in  
Figure 11.  
[7.2] Photo Heads  
1. Remove the detector cover by inserting a small bladed  
screwdriver into the slot located 90 degrees from the  
field test port. Rotate the cover counterclockwise to re-  
move (see Figure 13).  
3. Remove the detector head cover by placing a small  
blade screwdriver in the side slot of the detector cover,  
twisting it slightly until the cover can be turned counter-  
clockwise.  
2. Lift the screen from the photo chamber. Vacuum the  
screen and cover before using clean, compressed air to  
loosen and blow out any remaining debris. Replacement  
screens (RS24) are available.  
4. Carefully reinsert the detector head into the duct hous-  
D400-13-00  
10  
 
I56-555-09R  
Figure 13. Photo head exploded view:  
REMOVABLE HEAD COVER  
TEST SLOT  
CLEANABLE SCREEN  
P/N RS24 (W/O THERMAL)  
HEAD COVER  
REMOVAL SLOT  
VANED CHAMBER  
H0261-00  
3. Vacuum the photo chamber. Use clean compressed air to  
blow it clean.  
4. Replace the screen by aligning the arrow on top with  
the field test port on the detector. Press the screen into  
place. It should fit tightly on the chamber.  
5. Replace the detector cover and rotate it clockwise to lock  
it in place.  
[7.4] Reinstallation  
1. Reinstall the detector in its housing.  
2. Restore system power.  
3. Perform Detector Check, Section [5.7].  
4. Notify the proper authorities testing has been completed  
and the smoke detector system is back in operation.  
D400-13-00  
11  
 
I56-555-09R  
[8] Model DH400ACDCP Air Duct Smoke Detector Specifications  
Description  
HVAC air duct mounted ionization or photoelectronic smoke detector for separately powered systems or stand alone sys-  
tems. Auxiliary alarm relay contacts provide fan contactor shutdown to prevent HVAC circulation of smoke.  
Environmental Limits  
Temperature:  
32°F to 120°F  
0°C to 49°C  
Humidity:  
Air Velocity:  
10% to 93% R.H. non-condensing  
500 to 4000 Ft/min.  
2.54 to 20.3 m/sec.  
Test Features  
Magnetic test switch, magnetic reset switch, MOD400R test module (optional), RTS451 Remote Test Station (optional).  
Mechanical Specifications  
Length:  
14.5 inches 37 cm  
Width:  
Depth (installed):  
Weight:  
5 inches  
4 inches  
4 pounds  
13 cm  
10 cm  
1.8 kg  
Terminals  
Captive universal terminal screws with sems plates accept wire sizes of 14 gauge or smaller. The screws can withstand 10  
in-lbs of tightening torque without damage.  
Accessories  
MOD400R  
RA400Z  
Sensitivity Test Module  
Remote Annunciator  
RTS451/RTS451KEY  
PA400  
Remote Test Station, test & reset switch with alarm LED  
Piezo Sounder  
APA451  
Annunciator with piezo, alarm & power LEDs  
Replacement Air Filter (two per package)  
Replacement Test Magnet  
Replacement End Plug for inlet sampling tube  
Replacement Calibrated Test Card (For photo units only)  
Replacement Screen, Photo  
F36-05-00  
M02-04-00  
P48-21-00  
R59-18-00  
RS24  
A2650-01  
Replacement Installation Kit (mounting hardware)  
Sampling (Inlet) Tubes  
TUBE  
ST-1.5  
ST-3  
OUTSIDE DUCT WIDTH  
1 to 2 feet  
2 to 4 feet  
4 to 8 feet  
(0.3 to 0.6 m)  
(0.6 to 1.2 m)  
(1.2 to 2.4 m)  
ST-5  
ST-10  
8 to 12 feet (2.4 to 3.7 m)  
Exhaust Tube Extension  
A2440-00  
5.75 in. (14.6 cm.) additional  
D400-13-00  
12  
I56-555-09R  
 
Electrical Specifications  
Power supply voltage:  
Input capacitance:  
20-29 VDC  
270 µF max.  
3.0 VDC min.  
.03 to 0.3 sec.  
0.6 sec. max.  
34 sec.max.  
2 to 17 sec.  
24 VAC 50-60-Hz  
270 µF max.  
2.0 VAC min.  
.03 to 0.3 sec.  
0.6 sec. max.  
34 sec. max.  
2 to 17 sec.  
120 VAC 50-60 Hz 220/240 VAC 50-60 Hz  
N/A  
N/A  
Reset voltage:  
10 VAC min.  
.03 to 0.3 sec.  
0.6 sec. max.  
34 sec. max.  
2 to 17 sec.  
See head label  
20 VAC min.  
.03 to 0.3 sec.  
0.6 sec. max.  
34 sec. max.  
2 to 17 sec.  
See head label  
Reset time (with RTS451):  
Reset time (by power down):  
Power up time:  
Alarm response time:  
Sensitivity Test:  
See head label  
See head label  
Electrical Ratings  
Power Supply Voltage  
20 - 29 VDC  
24 VAC 50 - 60 Hz  
120 VAC 50 - 60 Hz  
220/240 VAC 50 - 60 Hz  
CURRENT REQUIREMENTS (USING NO ACCESSORIES)  
Max. standby current  
25 mA  
95 mA  
35 mA AC avg.  
55 mA AC avg.  
20 mA AC avg.  
55 mA AC avg.  
20 mA AC avg.  
30 mA AC avg.  
Max. alarm current  
CONTACT RATINGS  
ACCESSORY CURRENT LOADS AT 24 VDC  
Alarm initiation contacts (SPST)  
Alarm auxiliary contacts (DPDT)  
2.0A @ 30 VAC/DC (0.6 power factor)  
ALARM  
DEVICE  
APA451  
PA400  
STANDBY  
12mA MAX  
0mA  
30mA MAX  
15mA MAX  
10mA MAX  
10mA MAX*  
10A @ 30 VDC  
10A @ 250 VAC  
RA400Z  
0mA  
RTS451/ RTS451KEY 0mA*  
ANY COMBINATION OF ACCESSORIES MAY BE  
USED SUCH THAT THE GIVEN CURRENT LOADS TOTAL:  
Note: Alarm auxiliary contacts must switch 500 mA minimum at 24VDC. Alarm auxiliary contacts shall not be  
connected to inititaing circuits of control panels. Use the alarm initiation contact for this purpose.  
100mA OR LESS IN THE STANDBY STATE,  
150mA OR LESS IN THE ALARM STATE.  
*NOTE: WHEN INITIATING AN ALARM, THE RTS451/  
RTS451KEY REQUIRES 95 mA MAXIMUM IN  
PRE-ALARM AND 103 mA MAXIMUM IN ALARM.  
NOMINAL STANDBY CURRENT IS 0mA. ALARM  
CURRENT IS 10 mA MAXIMUM WHEN TEST  
MAGNET IS REMOVED.  
Trouble contacts (SPST)  
0.3A @ 32 VDC (resistive)  
Please refer to insert for the Limitations of Fire Alarm Systems  
Three-Year Limited Warranty  
System Sensor warrants its enclosed air duct smoke detector to be free from defects  
RA #__________, 3825 Ohio Avenue, St. Charles, IL 60174. Please include a note  
describing the malfunction and suspected cause of failure. The Company shall not  
be obligated to repair or replace units which are found to be defective because of  
damage, unreasonable use, modifications, or alterations occurring after the date of  
manufacture. In no case shall the Company be liable for any consequential or inci-  
dental damages for breach of this or any other Warranty, expressed or implied what-  
soever, 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.  
in materials and workmanship under normal use and service for a period of three  
years from date of manufacture. System Sensor makes no other express warranty  
for this air duct smoke detector. 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  
repair or replacement of any part of the air duct smoke detector 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 System  
Sensor’s toll free number 800-SENSOR2 (736-7672) for a Return Authorization num-  
ber, send defective units postage prepaid to: System Sensor, Repair Department,  
D400-13-00  
13  
 
I56-555-09R  
NOTES  
D400-13-00  
14  
I56-555-09R  
 
NOTES  
D400-13-00  
15  
I56-555-09R  
 
DETECTOR TEST LOG  
Detector Identification Information  
Manufacturer and  
Serial  
Date  
Detector Model:______________________ Number:______________________ Installed: ___________________  
Description of Detector Location:  
________________________________________________________________________________________________  
________________________________________________________________________________________________  
________________________________________________________________________________________________  
Test Results and Maintenance Data  
Date  
Tested  
Test  
Description  
Test  
Results  
Maintenance  
Performed  
Comments  
________  
________  
________  
________  
________  
________  
________  
________  
________  
________  
________  
________  
________  
________  
________  
________  
________  
________  
________  
________  
________  
________  
________  
________  
________  
________  
________  
________  
________  
________  
________  
___________  
___________  
___________  
___________  
___________  
___________  
___________  
___________  
___________  
___________  
___________  
___________  
___________  
___________  
___________  
___________  
_______  
_______  
_______  
_______  
_______  
_______  
_______  
_______  
_______  
_______  
_______  
_______  
_______  
_______  
_______  
_______  
______________  
______________  
______________  
______________  
______________  
______________  
______________  
______________  
______________  
______________  
______________  
______________  
______________  
______________  
______________  
______________  
___________________________  
___________________________  
___________________________  
___________________________  
___________________________  
___________________________  
___________________________  
___________________________  
___________________________  
___________________________  
___________________________  
___________________________  
___________________________  
___________________________  
___________________________  
___________________________  
D400-13-00  
16  
I56-555-09R  
© System Sensor 1997  
 

Sharp PDAs Smartphones OZ 290 User Manual
Shure Microphone 27C687 User Manual
Sierra Wireless Network Card MP 595 User Manual
Silvercrest Food Processor SKM 550 A1 User Manual
Snapper Lawn Aerator 4559 User Manual
Sony Blu ray Player 4 169 142 111 User Manual
Sony CD Player CDX A251C User Manual
Sony Flat Panel Television SL Series User Manual
Sony Microphone AU User Manual
Speco Technologies Security Camera PVS CAMC User Manual