System Sensor Smoke Alarm 24TSRB User Manual

INSTALLATION AND MAINTENANCE INSTRUCTIONS  
2112/24TSRB Photoelectronic  
Smoke Detector  
A Division of Pittway  
3825 Ohio Avenue, St. Charles, Illinois 60174  
1-800-SENSOR2, FAX: 630-377-6495  
Specifications  
Diameter:  
Height (including mounting bracket):  
Weight:  
5.5 inches (140 mm)  
1.7 inches (43 mm)  
5.3 oz. (150 g)  
Operating Temperature Range:  
Operating Humidity Range:  
Latching Alarm:  
32° to 100°F (0° to 39°C)  
10% to 93% relative rumidity, noncondensing  
Reset by momentary power interruption  
135°F fixed temperature electronic thermistor  
Heat Sensor:  
Electrical Ratings  
System Voltage  
nominal:  
Minimum:  
Maximum:  
12 or 24 VDC  
8.5 VDC  
35 VDC  
Maximum Ripple Voltage:  
Standby Current:  
30% of nom. voltage (peak to peak)  
15 mA maximum  
Alarm Current:  
at 12V: 38 mA maximum  
at 24V:  
45 mA maximum  
Reset Voltage:  
Reset Time:  
0.8 VDC minimum  
0.3 seconds maximum  
Start-up Time:  
30 seconds maximum (after 30 second reset)  
Supervision and Alarm Initiation Contact Ratings  
Resistive or inductive load (60% power factor)  
Form A:  
0.5A @ 30 VAC/DC  
Before Installing  
mounting bracket and plug-in screw terminal block that  
can be prewired to the system, allowing the detector to  
be easily installed or removed for cleaning. The detector’s  
sensitivity can be tested in place using the MOD400R Test  
Module (available separately from System Sensor).  
Please thoroughly read System Sensor manual I56-407,  
Guide for Proper Use of System Smoke Detectors, which  
provides detailed information on detector spacing, place-  
ment, zoning, wiring, and special applications. Copies of  
this manual are available at no charge from System Sensor.  
The 2112/24TSRB features a supervisory relay that super-  
vises the power and the sensitivity of the detector. When  
the power to the detector is lost, the supervisory relay  
opens instantaneously. Where as, when the detector devi-  
ates from its sensitivity range indicating the need for main-  
tenance, the supervisory relay opens after a maintenance  
condition has continuously existed for 30 to 35 minutes.  
NOTICE: This manual should be left with the owner/user  
of this equipment.  
IMPORTANT: This detector must be tested and maintained  
following NFPA 72 requirements. The detector should be  
cleaned at least once a year.  
General Description  
An LED on the detector provides a local visual indication  
of the detector’s status. If power is applied to the detector,  
and it is functioning normally in standby, the status LED  
blinks every ten seconds. The LED latches on in alarm and  
quits flashing when the detector deviates from its sensitiv-  
ity range.  
The Model 2112/24TSRB is a 4-wire photoelectronic smoke  
detector that uses a state-of-the-art optical sensing cham-  
ber. This detector is designed to provide open area pro-  
tection. It features a restorable, built-in, fixed-temperature  
(135°F) thermal sensor.  
Installation of this detector is simplified by the use of the  
D200-61-00  
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I56-930-02  
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Figure 3. Wiring diagram for the 2112/24TSRB detector:  
+
POWER  
TO  
DETECTORS  
+
+
+
P
+
P
W
R
W
R
UL LISTED  
CONTROL  
PANEL  
EOL RESISTOR  
SPECIFIED BY  
PANEL  
MANUFACTURER  
A78-2336-02  
+
INITIATING  
LOOP  
OPTIONAL CLASS A WIRING  
B. Test Module (System Sensor Model No. MOD400R).  
The MOD400R test module can be used with a DMM  
or analog voltmeter to check the detector sensitivity as  
described in the test module’s manual.  
CAUTION  
Dust covers are an effective way to limit the entry of dust  
into smoke detector sensing chambers. However, they may  
not completely prevent airborne dust particles from en-  
tering the detector. Therefore, System Sensor recommends  
the removal of detectors before beginning construction or  
other dust producing activity. Be sure to remove dust covers  
from any sensors that were left in place during construction  
as part of returning the system to service.  
C. Smoke Entry Test  
Hold a smoldering punk stick or cotton wick at the side  
of the detector and gently blow smoke through the de-  
tector until the unit alarms.  
D. Direct Heat Method (Hair dryer of 1000-1500 watts).  
Direct the heat toward either of the side thermistors.  
Hold the heat source about 12 inches from the detector  
in order to avoid damage to the plastic. The detector will  
reset only after it has had sufficient time to cool and the  
power source has been momentarily interrupted.  
Both smoke and heat detection testing are recommended  
for verifying system protection capability.  
Testing  
NOTE: Before testing, notify the proper authorities that the  
smoke detector system is undergoing maintenance  
and will be temporarily out of service. Disable the  
zone or system undergoing maintenance to prevent  
unwanted alarms.  
Detectors must be tested after installation and following  
periodic maintenance. Test the 2112/24TSRB as follows:  
A. Test Switch  
A detector that fails to activate with any of the above tests  
should first be cleaned as outlined in MAINTENANCE. If  
the detector still fails to activate, return it for repair.  
Notify the proper authorities the system is in operation.  
1. A recessed test switch is located on the detector hous-  
ing (See Figure 4).  
2. Press and hold the recessed test switch with a 0.1  
inch maximum diameter tool such as an allen wrench  
or small screwdriver.  
3. The detector’s LED should light within 5 seconds.  
Figure 4. Top and side views showing position of test switch:  
LED  
PUSH RECESSED  
SWITCH WITH A  
0.1MAX. DIAMETER TOOL  
RECESSED TEST  
TEST MODULE  
SWITCH  
A78-2564-00  
SOCKET  
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Maintenance  
8. Replace the cover using the test module socket and  
LEDs to align the cover and then gently pushing it until  
it locks into place.  
It is recommended that the detector be removed from  
its mounting base to facilitate cleaning. The detector is  
cleaned as follows:  
9. Reinstall the detector.  
NOTE: Before removing the detector, notify the proper 10. Test the detector as described in TESTING.  
authorities that the smoke detector system is un- 11. Reconnect disabled circuits.  
dergoing maintenance and will be temporarily out 12. Notify the proper authorities that the system is back on  
of service. Disable the zone or system undergoing  
maintenance to prevent unwanted alarms.  
1. Remove the detector cover by prying away the four  
side tabs with a small-bladed screwdriver, and then  
pulling the cover from the base.  
line.  
Figure 5. Removal of cover and screen for cleaning:  
2. Vacuum the screen carefully without removing it. If  
further cleaning is required continue with Step 3, oth-  
erwise skip to Step 8.  
REMOVABLE  
HOUSING  
3. Remove the screen assembly by pulling it straight out  
(see Figure 5).  
REMOVABLE  
SCREEN  
4. Remove the sensing chamber cover by pulling it  
straight out.  
5. Clean the vaned chamber piece by vacuuming or blow-  
ing out dust and particles.  
6. Replace the sensing chamber cover, aligning the arrow  
on the top with arrow on the printed circuit board.  
7. To replace the screen, place it over the chamber as-  
sembly, turning it until it snaps into place.  
SENSING  
CHAMBER  
COVER  
SENSING  
CHAMBER  
BASE  
A78-2565-02  
WARNING  
The Limitations of Property Protection Smoke Detectors  
This smoke detector is designed to activate and initiate emergency ac-  
tion, but will do so only when it is used in conjunction with an authorized  
fire alarm system. This detector must be installed in accordance with  
NFPA standard 72.  
Smoke detectors will not work without power. AC or DC powered  
smoke detectors will not work if the power supply is cut off.  
Smoke detectors will not sense fires which start where smoke does  
not reach the detectors. Smoldering fires typically do not generate a lot  
of heat which is needed to drive the smoke up to the ceiling where the  
smoke detector is usually located. For this reason, there may be large de-  
lays in detecting a smoldering fire with either an ionization type detector  
or a photoelectric type detector. Either one of them may alarm only after  
flaming has initiated which will generate the heat needed to drive the  
smoke to the ceiling.  
Smoke from fires in chimneys, in walls, on roofs or on the other side of a  
closed door(s) may not reach the smoke detector and alarm it. A detector  
cannot detect a fire developing on another level of a building quickly or  
at all. For these reasons, detectors shall be located on every level and in  
every bedroom within a building.  
types of fires. Ionization detectors offer a broad range of fire sensing ca-  
pability but they are somewhat better at detecting fast flaming fires than  
slow smoldering fires. Photoelectric detectors sense smoldering fires bet-  
ter than flaming fires which have little, if any, visible smoke. Because fires  
develop in different ways and are often unpredictable in their growth, nei-  
ther type of detector is always best, and a given detector may not always  
provide early warning of a specific type of fire.  
In general, detectors cannot be expected to provide warnings for fires  
resulting from inadequate fire protection practices, violent explosions,  
escaping gases which ignite, improper storage of flammable liquids like  
cleaning solvents which ignite, other similar safety hazards, arson, smok-  
ing in bed, children playing with matches or lighters, etc. Smoke detectors  
used in high air velocity conditions may have a delay in alarm due to  
dilution of smoke densities created by frequent and rapid air exchanges.  
Additionally, high air velocity environments may create increased dust  
contamination, demanding more frequent maintenance.  
Smoke detectors cannot last forever. Smoke detectors contain electronic  
parts. Even though smoke detectors are made to last over 10 years, any  
part can fail at any time. Therefore, smoke detectors shall be replaced after  
being in service for 10 years. The smoke detector system that this detec-  
tor is used in must be tested regularly per NFPA 72. This smoke detector  
should be cleaned regularly per NFPA 72 or at least once a year.  
Smoke detectors have sensing limitations, too. Ionization detectors and  
photoelectric detectors are required to pass fire tests of the flaming and  
smoldering type. This is to ensure that both can detect a wide range of  
Three-Year Limited Warranty  
System Sensor warrants its enclosed smoke detector to be free from de-  
fects 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 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 obliga-  
tion of this Warranty shall be limited to the repair or replacement of any  
part of the 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 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 incidental dam-  
ages 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.  
D200-61-00  
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I56-930-02  
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