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INSTALLATION AND MAINTENANCE INSTRUCTIONS
2112/24S and 2112/24TS Photoelectronic Smoke Detectors
Specifications Diameter: Height (including mounting bracket): Weight: Operating Temperature Range Model 2112/24S: Model 2112/24TS: Operating Humidity Range: Latching Alarm: Heat Sensor (2112/24TS only): Electrical Ratings System Voltage (nominal): Minimum: Maximum: Maximum Ripple Voltage: Standby Current: Alarm Current: 5.5 inches (140 mm) 1.9 inches (48 mm) 5.3 oz. (150 g)
3825 Ohio Avenue, St. Charles, Illinois 60174 1-800-SENSOR2, FAX: 630-377-6495
32 to 120 F (0 to 50 C) 32 to 100 F (0 to 38 C) 10% to 93% Relative Humidity, Noncondensing Reset by momentary power interruption 135 F Fixed Temperature Electronic Thermistor 12 or 24 VDC 8.5 VDC 35 VDC 30% of nom. Voltage (peak to peak) 50 A maximum 17 mA typical, 23 mA max. at 12V 19 mA typical, 25 mA max. at 24V 0.8 VDC minimum 0.3 seconds maximum 30 seconds maximum (after 60 sec. reset) A77-716B, 12/24 Volt
Reset Voltage: Reset Time: Start-up Time: EOL Relay: Alarm Initiation Contact Ratings Resistive or Inductive Load (60% power factor) Form A: 0.5A @ 30 VAC/DC
Before Installing Please thoroughly read the System Sensor manual I56-407, Guide for Proper Use of System Smoke Detectors, 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. NOTICE: This manual shall 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 Model 2112/24S is a 4-wire photoelectronic smoke detector that uses a state-of-the-art optical sensing chamber. This detector is designed to provide open area protection. Model 2112/24TS features a restorable, built-in, fixed-temperature (135 F) thermal detector.
Installation of these detectors is simplified by the use of a mounting bracket and a 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. 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 mode within the listed sensitivity ranges, the status LED blinks once every ten seconds. The LED also provides a visual indication that maintenance is required. If the LED stops blinking, the detector is either not powered, out of the listed sensitivity range, and/or unable to function properly. The test switch will not operate if the detector is below the insensitive limit. The LED will also latch on when the detector is in alarm.
D200-62-00
1
I56-932-12R
Figure 1. Surface mounting of 2112/24S smoke detector on 31/2-inch and 4-inch octagonal box:
separate grounded conduit. Do not mix fire system wiring in the same conduit as any other electrical wiring. Twisted pair may be used to provide additional protection against electrical interference. Smoke detectors and alarm system control panels have specifications for allowable loop resistance. Consult the control panel specifications for the total loop resistance allowed for the control panel being used before wiring the detector loops. 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. Installation
WARNING
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A78-2563-00
Mounting Each 2112/24S and 2112/24TS detector is supplied with a mounting bracket that permits the detector to be mounted: 1. To a single gang box, or 2. Directly to a 31/2-inch or 4-inch octagonal box, or 3. To a 4 inch square electrical box by using a plaster ring. 4. Directly to the ceiling using drywall anchors, if permitted by local codes and/or the authority having jurisdiction. Tamper-resistant Feature This detector includes a tamper-resistant feature that prevents its removal from the bracket without the use of a tool. To make the detector tamper-resistant, remove the smaller tab by breaking it at the scribed line on the tamper resistant tab on the detector mounting bracket (see Figure 2), then install the detector. To remove the detector from the bracket once it has been made tamper resistant, use a small screwdriver to depress the tamper-resistant tab, located in the slot on the mounting bracket, and turn the detector counterclockwise. Wiring Installation Guidelines All wiring must be installed in compliance with the National Electrical Code, applicable local codes, and any special requirements of the local authority having jurisdiction. Proper wire gauges should be used. The conductors used to connect smoke detectors to control panels and accessory devices should be color-coded to reduce the likelihood of wiring errors. Improper connections can prevent a system from responding properly in the event of a fire. The screw terminal block accepts 14 - 22 gauge wire. For best system performance, all wiring should be installed in
Remove power from the control unit or initiating device circuits before installing detectors. 1. Wire the plug-in screw terminal block per Figure 3 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 until 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. (See page 3.) 6. Reset the detector at the system control panel. 7. Notify the proper authorities the system is in operation.
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 entering 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.
Figure 2. 2112/24S and 2112/24TS smoke detector mounting bracket:
TAMPER SLOT (DEPRESS TAB TO REMOVE DETECTOR)
TAMPER RESISTANT TAB (CUT OFF SMALL TAB TO ACTIVATE TAMPER-RESIST FEATURE)
D200-62-00
C R EO V E R L M OVA C R EO V E R L M OVA
ALIGNMENT ARROWS
A78-2333-01
2
I56-932-12R
Figure 3. Wiring diagram for the 2112/24S and 2112/24TS detector:
POWER + TO DETECTORS
-
UL LISTED CONTROL PANEL
+ +P W +R
+ +P W +R
EOL POWER SUPERVISION RELAY (SHOWN ENERGIZED) A77-716 12/24V
-
-
N.O. C
N.O. C
EOL RESISTOR SPECIFIED BY PANEL MANUFACTURER
-
INITIATING LOOP
+ -
OPTIONAL CLASS A WIRING
-
A78-2336-03
NOTE : Observe polarity in power and initiating loops when wiring.
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 2112/24S as follows: A. Test Switch 1. A recessed test switch is located on the detector housing (See Figure 4). 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 described in the test module's manual. C. Smoke Entry Test Hold a smoldering punk stick or cotton wick at the side of the detector and gently blow smoke through the detector until the unit alarms. D. Direct Heat Method (Model 2112/24TS only - 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. Notify the proper authorities the system is back in operation. Maintenance NOTE: Before removing the detector, 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.
Figure 4. Top and side views showing position of test switch:
LED
C R EO V E R L M OVA
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TEST MODULE SOCKET
C R EO V E R L M OVA
RECESSED TEST SWITCH
D200-62-00 3
PUSH RECESSED SWITCH WITH A 0.18 MAX. DIAMETER TOOL
A78-2564-05
I56-932-12R
1. Remove cover by turning counter clockwise in direction of arrow. 2. Vacuum the cover carefully (See Figure 5). 3. Remove the sensing chamber cover. 4. Clean the sensing chamber by vacuuming or blow ing out dust and particles. 5. Replace the sensing chamber cover, aligning the arrow on the top of the chamber cover with the arrow on the housing. 6. Replace the cover by placing over the sensing chamber cover and twisting until it snaps into place. 7. Reinstall the detector. 8. Notify the proper authorities that the system is back in operation.
Figure 5. Removal of cover and screen for cleaning:
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REMOVABLE SCREEN/COVER (PART NO. C58-357-XX))
SENSING CHAMBER COVER
HOUSING
A78-2565-07
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 defects 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 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 DepartD200-62-00 4 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, 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. I56-932-12R
(c) 2001 System Sensor

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