System Sensor 2112-24S, 2112-24TS User Manual

INSTALLATION AND MAINTENANCE INSTRUCTIONS
2112/24S and 2112/24TS
3825 Ohio Avenue, St. Charles, Illinois 60174
Photoelectronic Smoke Detectors
Specifications
Diameter: 5.5 inches (140 mm) Height (including mounting bracket): 1.9 inches (48 mm) Weight: 5.3 oz. (150 g) Operating Temperature Range
Model 2112/24S: 32° to 120°F (0° to 50°C)
Model 2112/24TS: 32° to 100° F (0° to 38° C) Operating Humidity Range: 10% to 93% Relative Humidity, Noncondensing Latching Alarm: Reset by momentary power interruption Heat Sensor (2112/24TS only): 135° F Fixed Temperature Electronic Thermistor
Electrical Ratings
System Voltage (nominal): 12 or 24 VDC
Minimum: 8.5 VDC
Maximum: 35 VDC Maximum Ripple Voltage: 30% of nom. Voltage (peak to peak) Standby Current: 50 µA maximum Alarm Current: 17 mA typical, 23 mA max. at 12V
19 mA typical, 25 mA max. at 24V Reset Voltage: 0.8 VDC minimum Reset Time: 0.3 seconds maximum Start-up Time: 30 seconds maximum (after 60 sec. reset) EOL Relay: A77-716B, 12/24 Volt Alarm Initiation Contact Ratings
Resistive or Inductive Load (60% power factor)
Form A: 0.5A @ 30 VAC/DC
1-800-SENSOR2, FAX: 630-377-6495
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.
D200-62-00 1 I56-932-12R
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.
Figure 1. Surface mounting of 2112/24S smoke
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detector on 31/2-inch and 4-inch octagonal box:
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
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
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 RESISTANT TAB
TAMPER SLOT (DEPRESS TAB TO REMOVE DETECTOR)
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V
M
A
E
L
R
V
E
O
R
C
ALIGNMENT
C
R
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E
V
R
L
E
A
M
V
O
ARROWS
D200-62-00 2 I56-932-12R
(CUT OFF SMALL TAB TO ACTIVATE TAMPER-RESIST FEATURE)
A78-2333-01
Figure 3. Wiring diagram for the 2112/24S and 2112/24TS detector:
+
POWER
TO
DETECTORS
UL LISTED CONTROL
PANEL
INITIATING
LOOP
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P
+
W
N.O.
R
+
C
+ –
OPTIONAL CLASS A WIRING
NOTE
: Observe polarity in power and initiating loops when wiring.
+ +
N.O. C
W
+
EOL POWER SUPERVISION RELAY (SHOWN ENERGIZED) A77-716 12/24V
P R
EOL RESISTOR SPECIFIED BY PANEL MANUFACTURER
A78-2336-03
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 au-
thorities 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
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R
V
E
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C
C
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TEST MODULE
O
SOCKET
RECESSED TEST SWITCH
D200-62-00 3 I56-932-12R
PUSH RECESSED SWITCH WITH A
0.18 MAX. DIAMETER TOOL
A78-2564-05
of arrow.
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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:1. Remove cover by turning counter clockwise in direction
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 Depart-
D200-62-00 4 I56-932-12R
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.
©2001 System Sensor
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