System Sensor Smoke Alarm DH500ACDC User Manual

INSTALLATION AND MAINTENANCE INSTRUCTIONS  
DH500ACDC Intelligent Air Duct  
Smoke Detector Housing  
Specifications  
3825 Ohio Avenue, St. Charles, Illinois 60174  
1-800-SENSOR2, FAX: 630-377-6495  
Length:  
Width:  
Depth:  
Weight:  
14.5 inches  
5 inches  
4 inches  
4 lbs.  
(36.7 cm.)  
(12.7 cm.)  
(10.2 cm.)  
(1.8 kg.)  
Operating Temperature Range:  
Operating Humidity Range:  
Duct Air Velocity:  
32° to 120°F (0° to 49°C)  
10% to 93% Relative Humidity  
500 – 4000 ft./min. (91.4 – 1219.2 m/min.  
Power Supply Electrical Ratings For DH500ACDC  
24 VDC (20 - 30)  
mA DC MAX.  
Power  
Requirements  
120 VAC (102 - 132)  
mA rms MAX.  
240 VAC (204 - 264)  
mA rms MAX.  
24 VAC (20.6 - 26.4)  
mA rms MAX.  
Device  
Alarm  
Standby  
Alarm  
87  
Standby  
Alarm  
52  
Standby  
Alarm  
Standby  
DH500ACDC  
30  
1.5  
1
182  
29  
26  
--  
44  
--  
25  
--  
65  
PA400*  
15  
3
--  
--  
RA400ZA*  
17.3  
17.3  
157  
--  
10  
--  
1.5  
1.5  
13  
--  
RTS451/RTS451KEY*  
RTS451**/RTS451KEY  
1
--  
--  
10  
--  
--  
6.5  
140  
95  
103  
11.5  
5.5  
The currents shown for the DH500ACDC are maximum values with no accessories.  
* All accessory currents are additional to DH500ACDC. There are no additional currents for accessories in standby.  
** RTS451/RTS451KEY when the magnet is held in place to initiate an alarm.  
24V output maximum load is 80 mA; auxiliary alarm output maximum load is 20 mA.  
Auxiliary Relay Contacts  
Minimum contact current must be greater than 500 mA at 24 VDC  
10 amps maximum at 30 VDC  
10 amps maximum at 250 VAC  
Before Installing  
General Description  
Please thoroughly read the System Sensor Manual I56-  
473-XX, Guide for Proper Use of Smoke Detectors in Duct  
Applications, which provides detailed information on  
detector spacing, placement, zoning, wiring, and special  
applications. Copies of this manual are available at no  
charge from System Sensor. NFPA Standards 72 and 90A  
should also be referenced for detailed information.  
An HVAC system supplies conditioned air to virtually every  
area of a building. Smoke introduced into this air duct sys-  
tem will be distributed to the entire building. Smoke detec-  
tors designed for use in air duct systems are used to sense  
the presence of smoke in the duct.  
The DH500ACDC Air Duct Detector Housings are used with  
System Sensor’s Model 1551 ionization detector heads and  
Model 2551 photoelectronic detector heads (purchased sep-  
arately). These two smoke detection methods are combined  
with an efficient housing design that samples air passing  
through a duct and allows detection of a developing hazard-  
ous condition. When sufficient smoke is sensed, an alarm  
signal is initiated at the fire control panel monitoring the  
detector, and appropriate action can be taken to shut off  
fans and blowers, change over air handling systems, etc.  
This can prevent the distribution 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.  
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Figure 2. Speed nut mounting location:  
Figure 2A. Installation of foam gaskets over sam-  
pling tube bushings:  
HOLE B  
SAMPLING  
TUBE BUSHING  
DUCT DETECTOR  
HOUSING  
MOUNTING  
SCREWS  
HOLE A  
DUCT  
WALL  
O-RINGS  
EXHAUST TUBE  
(EXTENSION BUSHING)  
FOAM  
GASKETS  
SPEED  
NUT  
SCREW HOLES FOR ATTACHING  
DETECTOR HOUSING TO DUCT  
H0117-00  
H0116-00  
CAUTION: Do not overtighten the screws.  
Exception: Where it is physically impossible to locate the Step 4. Install The Inlet Tube  
detector accordingly, the detector can be positioned closer The inlet tube (shown in Figure 3) is identified by a series  
than six duct widths, but as far as possible from the open- of air inlet holes on the tube. This tube must be purchased  
ing, bend, or deflection plates.  
separately. Order the correct length, as specified in Table  
1, for the width of the duct where it will be installed. The  
exhaust tube is molded into the base of the duct housing.  
Step 3. Mount Duct Housing  
Remove the duct housing cover. Slide the foam gaskets over  
the tube bushings as shown in Figure 2A. Make sure the The inlet tube should be installed in the inlet sampling  
two small holes in the gaskets line up with the two duct tube bushing located in the center of the duct detector  
housing mounting holes. Put one 5/16-inch O-ring over housing. (See Figure 2A.) The air inlet holes must face into  
each of the two #10 sheet metal screws. Use the two sheet the air flow. To assure proper installation, the tube mount-  
metal screws to secure the duct housing to the duct.  
ing flange is marked with arrows. Mount the inlet tube so  
that the arrows point into the air flow. Figure 4 shows the  
various combinations of duct detector and tube mounting  
configurations with respect to air flow.  
Table 1. Sampling (Inlet) Tubes  
TUBE  
ST-1.5  
ST-3  
ST-5  
ST-10  
OUTSIDE DUCT WIDTH  
1 to 2 ft.  
2 to 4 ft.  
4 to 8 ft.  
8 to 12 ft.  
(0.3 to 0.6 m)  
(0.6 to 1.2 m)  
(1.2 to 2.4 m)  
(2.4 to 3.7 m)  
Figure 3. Air duct detector inlet sampling tube:  
AIR HOLES  
FLANGE  
INLET  
TUBE  
END  
PLUG  
ARROWS  
MUST FACE  
INTO AIR FLOW  
H0108-00  
AIR FLOW DIRECTION  
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Figure 4. Tube mounting configurations with varying air flow direction and orientation of detector housing.  
Vertical as well as horizontal mounting is acceptable.  
DOTS INDICATE POSITION OF  
SAMPLING TUBE HOLES  
AIR FLOW  
AIR FLOW  
DIRECTION  
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  
A. Installation for Ducts Less Than 8 Feet Wide  
1. If the inlet tube is longer than the width of the air duct, Install the inlet tube as follows:  
drill a 3/4-inch hole in the duct directly opposite the  
hole already cut for the inlet tube.  
If the inlet tube is shorter than the width of the air duct,  
1. Drill a 3/4-inch hole in the duct directly opposite the  
hole already drilled for the inlet tube.  
install the end cap into the inlet tube as shown in Figure 2. Slide the inlet tube into the bushing located in the center  
3.  
of the duct housing. Position the tube so that the arrows  
point into the air flow. Secure the tube flange to the  
housing bushing with the two #6 self-tapping screws.  
3. From inside the duct, couple the other section of the  
inlet tube to the section already installed using the 1/2-  
inch conduit fitting supplied. Make sure that the holes  
on both of the air inlet tubes are lined up facing the  
direction of air flow.  
2. Slide the inlet tube into the bushing located in the center  
of the duct housing. Position the tube so that the arrows  
point into the air flow.  
3. Secure the tube flange to the housing bushing with the  
two #6 self-tapping screws.  
4. For tubes longer than the width of the air duct, the tube  
should extend through the opposite side of the duct. If  
there are more than 2 holes in the section of the tube 4. Trim the end of the tube protruding through the duct so  
extending from the duct, select a different tube length  
using Table 1. Otherwise, trim the end of the tube pro-  
truding through the duct so that 1 to 2 inches of the tube  
extends outside the duct. Plug this end with the tube  
end plug and tape closed any holes in the protruding  
section of the tube. Be sure to seal the duct when the  
tube protrudes.  
that 1 to 2 inches of the tube extends outside the duct.  
Plug this end with the tube end plug and tape closed any  
holes in the protruding section of the tube. Be sure to  
seal the duct when the tube protrudes.  
5. Any tube (over 3 feet long) that doesn’t protrude through  
the duct (on the side opposite the housing) must be sup-  
ported by other means.  
5. Any inlet tube over 3 feet long must be supported on the  
opposite side of the duct detector housing.  
NOTE: An alternate method to using the ST-10 is to use  
two ST-5 inlet tubes. Remove the flange from one  
of the tubes and install as described above. After  
the installation, use electrician’s tape to close off  
some of the sampling holes so that there are a total  
of 12 holes spaced as evenly as possible across the  
width of the duct.  
WARNING  
In no case should more than 2 air inlet holes be cut off the  
tube. There must be a minimum of 10 holes in the tube  
exposed to the air stream.  
B. Installation for Ducts More Than 8 Feet Wide  
NOTE: To install inlet tubes in ducts more than 8 feet  
wide, work must be performed inside the air duct.  
Sampling of air in ducts wider than 8 feet is accom-  
plished by using the ST-10 inlet sampling tube.  
NOTE: Air currents inside the duct may cause excessive  
vibration. This vibration can slowly open the  
seal around the tube and permit air to escape. To  
prevent this from occurring, a 3-inch floor flange,  
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available at most plumbing supply houses, may be Notes on Jumper Wire J5 (See Figure 5A):  
used. This flange/connector mounting technique 1. When the detector is used in a 4-wire application (relay  
makes the initial installation easier because a 1-  
inch to 1-1/4-inch hole may be drilled where the  
flange/connector will be used. It is easier to push  
the inlet tube through the larger hole.  
circuit is being used to control fans, dampers, etc.),  
jumper wire J5, located between the two terminal strips  
on the printed circuit board, must be cut to insure power  
supply supervision.  
Modification Of Inlet Sampling Tubes  
2. When the detector is used in a 2-wire application (relay  
control is not being used for any control of fans, damp-  
ers, etc.), jumper wire J5 must be left in place.  
There may be situations where duct widths are not as  
specified for the installation. In such cases, it is permissible  
to modify an inlet sampling tube that is longer than neces-  
sary to span the duct width.  
120/240 VAC Operation  
To complete the wiring for 110/120 VAC operation, connect  
Use a 0.193-inch diameter (#11) drill and add the appro- the power supply wires to terminals 15 and 16 (see Figure  
priate number of holes so that the total number of holes 5A). If 220/240 VAC operation is preferred, connect the  
exposed to the air flow in the duct is 10 to 12. Space the power supply wires to terminals 16 and 17.  
additional holes as evenly as possible over the length of  
the tube.  
24 VAC/DC Operation  
To complete the wiring for 24 VAC or DC, connect the  
power supply wires to terminals 7 and 8. Polarity is not  
important.  
Step 5. Field Wiring  
Wiring Installation Guidelines  
All wiring must be installed in compliance with the  
National Electrical Code and the local codes having juris- Step 6. Install the Filters  
diction, using the proper wire size(s). The conductors used Most duct installations are subject to dust accumulation.  
to connect smoke detectors to control panels and accessory System filters remove a large percentage of this contami-  
devices should be color-coded to reduce the likelihood of nation, but cannot remove all of it. Dust inside the duct  
wiring errors. Improper connections can prevent a system detector causes problems. First, very fine particles of dust  
from responding properly in the event of a fire.  
can enter the detector sensing chamber and cause the unit  
to alarm. Second, the accumulation of dust and dirt neces-  
For signal wiring, (the wiring between interconnected sitates a more frequent periodic cleaning schedule, which  
detectors or from detectors to auxiliary devices), it is rec- can result in substantial cost and/or down time.  
ommended that single-conductor wire be no smaller than Disposable sampling tube filters can greatly reduce the  
18 gauge. The duct detector terminals accommodate wire nuisance alarms caused by dust, and can also significantly  
sizes up to 14 gauge. The last foot or so of conduit should extend the maintenance interval. To install the sampling  
be flexible steel conduit (available in electrical supply tube filters, insert the filter adapter into the exhaust tube  
houses) which facilitates installation and puts less strain and push the filter onto the adapter tube on the left, as  
on the conduit holes in the housing. Solid conduit connec- shown in Figure 6. Then, install the other filter over the  
tions may be used, if desired.  
end of the inlet sampling tube.  
CAUTION  
Smoke detectors and alarm system control panels have  
specifications for allowable loop resistance. Consult the Filters require periodic cleaning or replacement, depend-  
control panel manufacturer’s specifications for the total ing on the amount of dust and dirt accumulated. Inspect  
loop resistance allowed for the control panel being used the filters at least quarterly – more often if dust accumula-  
before wiring the detector loop.  
tion warrants it. Replacement filters can be ordered from  
Notifier. (Exhaust tube/intake tube filter P/N F36-05-00.)  
Wiring Instructions  
The DH500ACDC is designed for easy wiring. The housing Filters rarely have a significant effect on the behavior of  
provides a terminal strip with clamping plates. Wiring con- smoke. As a result, even a filter that is as much as 90%  
nections are made by stripping approximately 3/8-inch of clogged does not significantly affect the entry of smoke  
insulation from the end of the wire, sliding this bare end into the duct detector housing. Therefore, visual inspection  
under the plate, and tightening the clamping plate screw.  
is usually all that is necessary to determine if filters need  
replacement.  
The DH500ACDC is built for 120/240 VAC or 24 VAC/DC  
to operate auxiliary functions. See Figure 5A for operating  
and wiring details.  
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Figure 5. Wiring diagram:  
D500-07-00  
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I56-432-11R  
 
Step 7. Perform Detector Check  
7.1 Air Flow  
B. RTS451/RTS451KEY Remote Test Station  
The RTS451/RTS451KEY Remote Test Station facili-  
tates testing of the duct detector alarm capability.  
The DH500ACDC duct detector cannot be reset by the  
RTS451/RTS451KEY. It must be reset at the system con-  
trol panel.  
1. To verify sufficient sampling of ducted air, use a manom-  
eter 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.  
2. To determine that smoke is capable of entering the sens- To install the RTS451/RTS451KEY test coil, connect the  
ing chamber, conduct a visual examination to note any device as shown in Figure 9. Place the coil in the detector  
obscurations around the sensing chamber. If a smoke housing with the arrow facing up and pointing toward the  
test is required, blow smoke from a cigarette, cotton detector as in Figure 9. Attach the coil leads to the housing  
wick, or punk directly at the smoke detector head. It is terminals as shown; polarity is not important. Firmly screw  
important to plug the exhaust and sampling tube hole the test coil mounting bracket in place over the test coil.  
to prevent ducted air from blowing smoke away from The resistance of the wire connecting the remote test sta-  
the smoke detector head. Record all test records in the tion to the duct detector must be less than 25 ohms.  
Detector Test Log at the end of this manual.  
7.3 MOD400R Sensitivity Test  
After verification of alarm capability, use a MOD400R test  
CAUTION  
Remove the plugs after testing or the detector will not module with a voltmeter to check detector sensitivity as  
sense smoke in the air duct.  
described in the MOD400R installation manual. The hous-  
ing cover must be removed to perform this test.  
7.2 Alarm Tests  
Before replacing the duct housing cover, check the detector If the MOD400R readings indicate that the sensor head is  
interconnections. Check the DH500ACDC as follows:  
outside of the acceptable range, the sensor heads require  
cleaning (refer to Periodic Maintenance Requirements).  
A. M02-04-00 Magnet Test  
1. Make sure power is applied to the detector.  
7.4 Trouble Test  
2. Position the painted surface of the test magnet against The capability of trouble detection is tested by removing  
the housing next to the rib molded onto the outside of the detector head from the duct housing. The detector  
the housing (see Figure 7).  
head is removed by rotating it counterclockwise about  
3. The LEDs on the detector should latch on as should 10 degrees (Figure 8). The system control panel should  
any accessories (PA400, RA400ZA, RTS451) and the indicate a trouble condition. Reinstalling the detector head  
alarm condition verified at the control panel. The should clear the trouble condition.  
control panel must be active to initiate an alarm.  
Figure 6. Sampling tube filter installation:  
INLET SAMPLING TUBE  
FOAM GASKET  
SAMPLING TUBE  
MOUNTING  
SCREWS  
DETECTOR BASE  
EXHAUST  
FILTER ADAPTER  
DETECTOR HEAD  
H0239-00  
SAMPLING TUBE  
FILTERS  
D500-07-00  
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I56-432-11R  
 
Figure 7. Testing detector alarm:  
Figure 8. 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  
H0243-00  
H0244-00  
Step 8. Install the Cover  
It is recommended that a permanent Detector Test Log be  
Install the cover using the four screws. Be certain filters are set up and maintained, with a record for each individual  
installed as specified in Step 6. Make sure that the cover fits smoke detector in each building. Each detector should be  
into the base groove and that all gaskets are in their proper clearly described, with information on the type of detector,  
positions. Tighten the four cover screws to 10 in-lbs.  
the model number, the serial number (if any), the location,  
and the type of environment. Data entries should include  
test dates, type of test mode, test results, maintenance, and  
Step 9. Perform the Final System Check  
Position the test magnet as shown in Figure 7. The LEDs comments. A Detector Test Log is included at the end of  
on the detector should light. Any accessory LED(s) should this manual.  
also light and the system control panel should indicate an  
alarm condition.  
Recommended Detector Maintenance Procedure  
NOTE: Notify the proper authorities that the smoke detec-  
tor system is undergoing maintenance and will be  
temporarily out of service. Disable the zone or sys-  
tem undergoing maintenance to prevent unwanted  
alarms and possible dispatch of the fire depart-  
ment.  
Periodic Maintenance Requirements  
Air duct smoke detectors should be maintained at least  
once a year – more often if the detector heads become  
obviously dirty. The detectors must also be cleaned imme-  
diately after a fire. Failure to properly maintain air duct  
smoke detectors may cause unnecessary false alarms.  
Figure 9. RTS451/RTS451KEY Test Coil Installation:  
TEST COIL  
DETECTOR  
HEAD  
H0245-0  
D500-07-00  
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I56-432-11R  
 
1. Turn off power to the system.  
2. Remove and inspect sampling tube filters.  
12. Brush or vacuum the inside of the cover. The cover  
may then be blown out using clean compressed air.  
3. If filters are heavily coated with dirt, replace them with 13. Vacuum the sensing chamber before using clean,  
new filters. If they are not heavily coated, use a vacuum  
cleaner or compressed air nozzle to remove dust, then  
install the filters.  
compressed air to loosen and blow out any remaining  
debris.  
14. Press the screen back into the cover.  
15. Replace the detector cover on the sensing chamber.  
Rotate it clockwise to lock it in place.  
Both Types Of Units  
4. Remove the detector from the housing. (See Figure 8.)  
Photo Units  
5. Remove the detector cover by inserting a small-bladed 16. Reinstall the detector in its housing.  
screwdriver into the slot located approximately 90 17. Restore system power.  
degrees from the MOD400 test jack. Rotate the cover 18. Put detector into alarm using appropriate method  
counterclockwise to remove it. See Figure 10.  
described in STEP 7.  
6. Lift the screen from the photo chamber. Vacuum the Perform Detector Check  
screen and cover before using clean, compressed air to 19. Notify the proper authorities that testing has been  
loosen and blow out any remaining debris (replacement completed and the smoke detector system is back in oper-  
screens are available, part no. RS24).  
ation.  
7. Vacuum the photo chamber. Then, use clean compressed 20. Other checks that should be made during maintenance  
air to blow it clean.  
procedures:  
8. Replace the screen by aligning the arrow on top with the  
test slot in the base of the detector. Press the screen into  
place. It should fit tightly in the chamber.  
Ion Units  
— Holes or cracks in duct work near vicinity of detec-  
tor.  
— Air leaks where detector housing or sampling tubes  
are attached to duct.  
9. See Figure 11. Remove the cover and screen assembly  
by depressing the three lock prongs on the top of the  
cover and rotating the cover counterclockwise. The  
CRT400 Cover Removal Tool makes cover removal  
easier.  
— Dust accumulations in or on sampling tubes.  
— Wiring terminal screw tightness.  
10. Carefully pull the screen out of the cover.  
11. Clean the screen thoroughly with a soft brush or vacu-  
um cleaner (replacement screens, part no. RS14).  
Figure 10. Photo head exploded view:  
Figure 11. Ion head, exploded view:  
REMOVABLE HEAD COVER  
REMOVABLE  
COVER  
FOR  
CLEANING  
TEST SLOT  
REMOVABLE SCREEN  
(P/N RS14)  
CLEANABLE SCREEN  
LOCK PRONG  
P/N RS24 (W/O THERMAL)  
SENSING CHAMBER  
HEAD COVER  
REMOVAL SLOT  
VANED CHAMBER  
H0246-00  
H0261-00  
D500-07-00  
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2. The duct control circuitry (auxiliary relay contacts and  
auxiliary alarm output) may change states if the sensor  
is tested and the LED is turned on for more than 4 sec-  
onds. If the LED is latched on for less than 4 seconds,  
the control circuitry of the DH500ACDC will NOT oper-  
ate.  
3. The panel must not poll the same unit for more than  
4 seconds continuously or the auxiliary relay and aux-  
iliary alarm output may switch states. After 4 seconds  
of continual polling of a device, the panel must wait a  
minimum of 100ms before polling or communicating to  
that same device.  
Accessories  
Remote LED  
Part No.  
RA400ZA  
PA400  
F36-05-00  
M02-04-00  
P48-21-00  
A2650-01  
RS14  
Piezo Alert Sounder  
Replacement Filters  
Magnet  
End Plug For Sampling Tube  
Installation Kit (Parts bag)  
Ionization Replacement Screen  
Sensitivity Test Kit  
MOD400R  
CRT400  
RTS451/RTS451KEY  
Ionization Cover Removal Tool  
Remote Test Station  
4. Communications must not cease for more than 3 sec-  
onds without an additional clock pulse (after Pulse  
Width 5) to turn off the LED on the sensor.  
Programming Specifications/Requirements For  
Intelligent System Control Panels  
5. To allow the auxiliary relay and auxiliary alarm output  
to return to a standby condition, (after being in alarm)  
the panel must wait a minimum of 100ms after turning  
off the sensor LED before communicating to that device  
again.  
CAUTION  
Models 1551 and 2551 can be used with the DH500ACDC if  
the following constraints are observed.  
1. There may be a limit to the number of devices per zone  
that can have their LEDs latched on. The number of  
devices is determined by the control panel and its abil-  
ity to supply LED current. If more than the maximum  
number of devices is on the same loop, do NOT use  
the DH500ACDC for control purposes. Control for duct  
applications would need to come directly from the con-  
trol panel or by using control modules.  
D500-07-00  
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I56-432-11R  
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  
Avenue, St. Charles, IL 60174. Please include a note describing the mal-  
function and suspected cause of failure. The Company shall not be obli-  
gated 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 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.  
from defects in materials and workmanship under normal use and ser-  
vice 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 author-  
ity 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 number, send defective units postage prepaid  
to: System Sensor, Repair Department, RA #__________, 3825 Ohio  
D500-07-00  
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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  
_______  
_______  
_______  
_______  
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D500-07-00  
12  
I56-432-11R  
2001 System Sensor  
©
 

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