System Sensor 2112 24D and 2112 24TD Manual

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INSTALLATION AND MAINTENANCE INSTRUCTIONS and 2112 24TD A Smoke Detectors Division of Pittway 3825 Ohio Avenue St Charles Illinois 60174 FAX 630 377 6495 detector requires that you observe polarity when wiring If wiring polarity is not observed on the loop the unit will send an alarm signal to the control panel to signify incorrect wiring OBSERVE POLARITY 1 Wiring diagram for the 2112 24D A and 2112 24TD A detectors LISTED POWER SHOWN 12 24V RESISTOR BY CLASS A WIRING Observe polarity in power and initiating loops when wiring 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 installation in Canada refer to CAN ULC S524 M91 for the Installation of Fire Alarm Systems and Part 1 sec 32 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 24D A is a 4 wire photoelectronic smoke de that uses a state of the art optical sensing chamber detector is designed to provide open area protection 2112 24TD A features a restoreable built in fixed 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 24D A and 2112 24TD A feature a visual that maintenance is required if the sensing drifts out of its sensitivity limits the LED ceases blink 2112 24D A and 2112 24TD A detector is supplied a mounting bracket that permits the detector to be To a single gang box or Directly to a 31 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 1 I56 932 07 5.5 inches 140 mm including mounting bracket 1.7 inches 43 mm 5.3 oz 150 g Temperature Range Model 2112 24D A 32 to 120 0 to 50 Model 2112 24TD A 32 to 100 0 to 39 Humidity Range 10 to 93 Relative Humidity Noncondensing Alarm Reset by momentary power interruption Sensor 2112 24TD A 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 Resistive Load 0.1A 35 VDC 2 Surface mounting of 2112 24D A smoke on 31 2 inch and 4 inch octagonal box 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 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 certain to observe polarity when wiring 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 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 2 I56 932 07 3 2112 24D A and 2112 24TD A smoke detector mounting bracket RESISTANT TAB CUT OFF SMALL TAB TO ACTIVATE TAMPER RESIST FEATURE SLOT TAB TO DETECTOR 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 maintenance Test the 2112 24D A as follows Test Switch 1 A recessed test switch is located on the detector hous 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 This detector has a feature that will signal an at the control panel if wiring polarity is Test the detector as described in TESTING Reset the detector at the system control panel Notify the proper authorities the system is in operation 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 See Figure 4 2 Press and hold the recessed test switch with a 0.18 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 a

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