System Sensor Smoke Alarm 24ATR User Manual

INSTALLATION AND MAINTENANCE INSTRUCTIONS  
2112/24ATR  
Photoelectronic Smoke Detector with  
Fixed Heat and Integral Temp-3 Sounder  
3825 Ohio Avenue, St. Charles, Illinois 60174  
1-800-SENSOR2, FAX: 630-377-6495  
Figure 1. Wiring diagram for the 2112/24ATR detector:  
IMPORTANT: OBSERVE POLARITY  
As with all sounder models, polarity must be observed on the power connections.  
+
POWER  
TO  
DETECTORS  
EOL POWER  
SUPERVISION  
RELAY (SHOWN  
ENERGIZED)  
+
+
+
+
P
W
R
P
W
R
A77-716 12/24V  
A
A
ALARM  
ALARM  
UL LISTED  
COMPATIBLE  
CONTROL  
PANEL  
CONTACT  
CONTACT  
A
NC  
C
A
NC  
C
NC  
COMMON  
NO  
NC  
COMMON  
NO  
EOL RESISTOR  
SPECIFIED BY  
PANEL  
A
U
X
A
U
X
(OPTIONAL)  
RELEASING  
DEVICE  
(OPTIONAL)  
RELEASING  
DEVICE  
MANUFACTURER  
NO  
NO  
INITIATING  
LOOP  
OPTIONAL CLASS A WIRING  
A78-2336-16  
Specifications  
Diameter:  
Height (including mounting bracket): 2.05 inches (52 mm)  
5.5 inches (140 mm)  
Weight:  
7.5 oz. (210 g)  
Operating Temperature Range:  
Operating Humidity Range:  
Latching Alarm:  
32° to 100°F (0° to 38°C)  
10% to 93% Relative Humidity, Noncondensing  
Reset by momentary power interruption  
Audible Signal:  
85 dBA minimum when in alarm or with supply polarity reversed  
Heat Sensor:  
135°F Fixed Temperature Electronic Thermistor  
Electrical Ratings  
System Voltage (nominal):  
Minimum:  
12 or 24 VDC  
10 VDC  
Maximum:  
35 VDC  
Maximum Ripple Voltage:  
Standby Current:  
Alarm Current:  
30% of nom. Voltage (peak to peak)  
50 µA maximum  
49 mA typical, 60 mA max. at 12V  
57 mA typical, 65 mA max. at 24V  
0.8 VDC minimum  
1.0 second maximum  
30 seconds maximum (after 60 sec. reset)  
A77-716B, 12/24 VDC  
Reset Voltage:  
Reset Time:  
Start-up Time:  
EOL Relay:  
Alarm Initiation and Auxiliary Relay: 1A @ 30 VAC  
Contact Ratings, Resistive Load:  
Special Considerations:  
1A @ 30 VDC  
Due to the built-in temporal pattern, use these detectors only with a non-coded  
power supply.  
NOTICE: This manual shall be left with the owner/user of  
Before Installing  
this equipment.  
Please thoroughly read the System Sensor manual I56-407,  
Guide for Proper Use of System Smoke Detectors, which pro-  
vides detailed information on detector spacing, placement,  
zoning, wiring, and special applications. Copies of this  
manual are available at no charge from System Sensor.  
IMPORTANT: This detector must be tested and maintained  
following NFPA 72 requirements. The detector should be  
cleaned at least once a year.  
D200-84-00  
1
I56-1240-02R  
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Wire connections are made by stripping about 1/4 inch of  
insulation from the end of the feed wire, inserting the wire  
into the appropriate terminal, and tightening the screw to  
secure the wire in place.  
2. Press and hold the recessed test switch with a 0.18  
inch maximum diameter tool such as an allen wrench  
or small screwdriver.  
3. The detector’s LED should light within 5 seconds.  
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 de-  
scribed in the test module’s manual.  
Installation  
WARNING  
Remove power from the control unit or initiating device cir-  
cuits before installing detectors.  
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.  
1. Wire the plug-in screw terminal block per Figure 1 and  
plug the terminal block into the detector.  
2. Align the arrows on the detector with the arrows on the  
mounting bracket.  
3. Turn the detector clockwise in the mounting bracket un-  
til it clicks into place.  
4. After all detectors have been installed, apply power to  
the control unit or initiating device circuits.  
5. Test the detector as described in TESTING.  
6. Reset the detector at the system control panel.  
7. Notify the proper authorities the system is in operation.  
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.  
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.  
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 enter-  
ing 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.  
Notify the proper authorities the system is back in  
operation.  
Maintenance  
NOTE: Before removing the detector, notify the proper au-  
thorities that the smoke detector system is under-  
going maintenance and will be temporarily out of  
service. Disable the zone or system undergoing  
maintenance to prevent unwanted alarms.  
NOTE: Before removing the detector cover, note the posi-  
tion of the thermistors. Make sure the thermistors  
are not bent over when the housing is replaced.  
Testing  
NOTE: Before testing, notify the proper authorities that  
the smoke detector system is undergoing mainte-  
nance and will be temporarily out of service. Dis-  
able the zone or system undergoing maintenance  
to prevent unwanted alarms.  
Detectors must be tested after installation and following  
periodic maintenance. Test the 2112/24ATR as follows:  
A. Test Switch  
1. Remove the detector housing by gently prying the four  
housing tabs on the bottom of the base with a small-  
bladed screwdriver and pull the housing from the base.  
Use caution to avoid damaging the thermistors.  
1. A recessed test switch is located on the detector hous-  
ing (See Figure 4).  
2. Vacuum the screen carefully without removing it.  
Figure 4. Top and side views showing position of test switch:  
LED  
PUSH RECESSED  
SWITCH WITH A  
0.18MAX. DIAMETER TOOL  
RECESSED TEST  
TEST MODULE  
SWITCH  
SOCKET  
A78-2564-00  
D200-84-00  
3
I56-1240-02R  
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3. Remove screen assembly, pulling straight out (please Figure 5. Removal of cover and screen for cleaning:  
see Figure 5).  
4. Remove the sensing chamber cover.  
5. Clean the sensing chamber by vacuuming or blowing  
out dust and particles.  
REMOVABLE  
HOUSING  
6. Replace the sensing chamber cover, aligning the arrow  
on the cover top with the arrow on the printed circuit  
board.  
7. Replace the screen by placing the screen assembly over  
the sensing chamber cover and twisting until it snaps  
into place.  
REMOVABLE  
SCREEN  
8. Replace the housing by aligning the three triangular  
slots on the base with their counterparts on the hous-  
ing. Gently press the housing until it locks in place.  
Check to make sure that the thermistors are in the up-  
right position.  
SENSING  
CHAMBER  
COVER  
SENSING  
CHAMBER  
9. Reinstall the detector.  
BASE  
10. Notify the proper authorities that the system is back in  
operation.  
A78-2565-04  
Please refer to insert for the Limitations of Fire Alarm Systems  
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 obligation  
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 work-  
manship under normal use and service during the three year period com-  
mencing 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 Depart-  
ment, 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, modifica-  
tions, 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 conse-  
quential 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.  
D200-84-00  
4
I56-1240-02R  
2001 System Sensor  
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