System Sensor 2112 24B and 2112 24TB

A Division of Pittway 3825 Ohio Avenue St Charles Illinois 60174 FAX 630 377 6495 AND MAINTENANCE INSTRUCTIONS and 2112 24TB Detectors 5.5 inches 140 mm including mounting bracket 1.7 inches 43 mm 5.3 oz 150 g Temperature Range Model 2112 24B 32 to 120 0 to 50 Model 2112 24TB 32 to 100 0 to 39 Humidity Range 10 to 93 Relative Humidity Noncondensing Alarm Reset by momentary power interruption Sensor 2112 24TB only 135 Fixed Temperature Electronic Thermistor Ratings Voltage nominal 12 or 24 VDC Minimum 8.5 VDC Maximum 35 VDC Ripple Voltage 30 of nom Voltage peak to peak Current 50 maximum Current 17 mA typical 23 mA max at 12V 19 mA typical 25 mA max at 24V Voltage 0.8 VDC minimum Time 0.3 seconds maximum Time 30 seconds maximum after 60 sec reset Relay A77 716B 12 24 Volt Initiation Contact Ratings or inductive load 60 power factor A 0.5A 30 VAC DC Installing thoroughly read the System Sensor manual I56 407 for Proper Use of System Smoke Detectors which detailed information on detector spacing place zoning wiring and special applications Copies of manual are available at no charge from System Sensor This manual should be left with the owner user this equipment This detector must be tested and maintained NFPA 72 requirements The detector should be at least once a year Description 2112 24B is a 4 wire photoelectronic smoke detector uses a state of the art optical sensing chamber This is designed to provide open area protection Model features a restoreable built in fixed tempera 135 thermal detector of these detectors is simplified by the use of a bracket and a plug in screw terminal block that be prewired to the system allowing the detector to be installed or removed for cleaning The detector can be tested in place using the MOD400R Test LED on the detector provides a local visual indication of detector status If power is applied to the detector and is functioning normally in standby the status LED blinks ten seconds The LED also latches on in alarm 2112 24B and 2112 24TB feature a visual indication maintenance is required if the sensing chamber drifts of its sensitivity limits the LED ceases to blink 1 I56 932 01 1 Surface mounting of 2112 24B smoke de on 3 1 2 inch and 4 inch octagonal box 2112 24B and 2112 24TB detector is supplied with a bracket that permits the detector to be mounted To a single gang box or Directly to a 3 1 2 inch or 4 inch octagonal box or To a 4 inch square electrical box by using a plaster ring Feature detector includes a tamper resistant feature that pre its removal from the bracket without the use of a To make the detector tamper resistant remove the tab by breaking it at the scribed line on the tamper tab on the detector mounting bracket see Figure then install the detector To remove the detector from bracket once it has been made tamper resistant use small screwdriver to depress the tamper resistant tab in the slot on the mounting bracket and turn the counterclockwise Installation Guidelines wiring must be installed in compliance with the Na Electrical Code applicable local codes and any spe requirements of the local authority having jurisdiction wire gauges should be used The conductors used connect smoke detectors to control panels and accessory should be color coded to reduce the likelihood of errors Improper connections can prevent a system responding properly in the event of a fire screw terminal block accepts 14 22 gauge wire For system performance all wiring should be installed in grounded conduit Do not mix fire system wiring the same conduit as any other electrical wiring Twisted may be used to provide additional protection against interference detectors and alarm system control panels have for allowable loop resistance Consult the panel specifications for the total loop resistance for the control panel being used before wiring the loops connections are made by stripping about 1 4 inch of from the end of the feed wire inserting the wire the appropriate terminal and tightening the screw to the wire in place power from the control unit or initiating device before installing detectors Wire the plug in screw terminal block per Figure 3 and the terminal block into the detector Align the arrows on the detector with the arrows on the Turn the detector clockwise in the mounting bracket un bracket it clicks into place After all detectors have been installed apply power to control unit or initiating device circuits Test the detector as described in TESTING Reset the detector at the system control panel Notify the proper authorities the system is in operation 2 2112 24B and 2112 24TB smoke detector mounting bracket SLOT TAB TO DETECTOR RESISTANT TAB CUT OFF SMALL TAB TO ACTIVATE TAMPER RESIST FEATURE 2 I56 932 01 3 Wiring diagram for the 2112 24B and 2112 24TB detector LISTED POWER SHOWN 12 24V RESISTOR BY CLASS A WIRING covers are an effective way to limit the entry of dust smoke detector sensing chambers However they may completely prevent airborne dust particles from en the detector Therefore System Sensor recommends removal of detectors before beginning construction or dust producing activity Be sure to remove dust covers any sensors that were left in place during construction part of returning the system to service Before testing notify the proper authorities that the detector system is undergoing maintenance will be temporarily out of service Disable the or system undergoing maintenance to prevent alarms must be tested after installation and following maintenance Test the 2112 24 as follows Test Switch 1 A recessed test switch is located on the detector hous See Figure 4 2 Press and hold the recessed test switch with a 0.1 maximum diameter tool such as an allen wrench small screwdriver 3 The detector LED should light within 5 seconds Test Module System Sensor Model No MOD400R The MOD400R test module can be used with a DMM analog voltmeter to check the detector sensitivity as in the test module manual Smoke Entry Test Hold a smoldering punk stick or cotton wick at the side the detector and gently blow smoke through the de until the unit alarms Direct Heat Method Model 2112 24TB only Hair dryer 1000 1500 watts Direct the heat toward either of the side thermistors the heat source about 12 inches from the detector order to avoid damage to the plastic The detector will only after it has had sufficient time to cool and the source has been momentarily interrupted smoke and heat detection testing are recommended verifying system protection capability detector that fails to activate with any of the ab