d200-62-00 1 i56-932-12r 2112/24s and 2112/24ts photoelectronic smoke detectors installation and maintenance instructions 3825 ohio avenue, st. charles, illinois 60174 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 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. 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 21 12/24ts features a restorable, built-in, fixed-temperature (135 f) thermal detector. specifications diameter: 5.5 inches (140 mm) height (including mounting bracket): 1.9 inches (48 mm) w eight: 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 sy stem 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 a maximum alarm current: 17 ma typical, 23 ma max. at 12v 19 ma typical, 25 ma max. at 24v r eset voltage: 0.8 vdc minimum r eset 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 r esistive or inductive load (60% power factor) f orm a: 0.5a @ 30 vac/dc 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 sen- sitivity 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 sec- onds. the led also provides a visual indication that main- tenance 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 2 i56-932-12r 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 3 1 / 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 permit- ted by local codes and/or the authority having jurisdic- tion. ta mper-resistant feature this detector includes a tamper-resistant feature that pre- v ents 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 screw- driver to depress the tamper-resistant tab, located in the slot on the mounting bracket, and turn the detector coun- terclockwise. w iring installation guidelines all wiring must be installed in compliance with the na- tional electrical code, applicable local codes, and any spe- cial 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 e 22 gauge wire. for best system performance, all wiring should be installed in figure 1. surface mounting of 2112/24s smoke detector on 3 1 / 2 -inch and 4-inch octagonal box: a78-2563-00 figure 2. 2112/24s and 2112/24ts smoke detector mounting bracket: a78-2333-01 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 al- lowed 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 w arning r emove power from the control unit or initiating device cir- cuits 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 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 . (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 enter- ing the detector. therefore, system sensor recommends the re moval 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. tamper slot (depress tab to remove detector) tamper resistant tab (cut off small tab to activate tamper-resist feature) alignment arrows c o v e r r e m o v a l c o v e r r e m o v a l
d200-62-00 3 i56-932-12r t esting 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 2112/24s as follows: a. test switch 1. a recessed test switch is located on the detector hous- ing (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. t est 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. 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. d. direct heat method (model 2112/24ts only e hair dryer of 1000-1500 watts) direct the heat toward either of the side thermistors. figure 3. wiring diagram for the 2112/24s and 2112/24ts detector: optional class a wiring eol resistor specified by panel manufacturer eol power supervision relay (shown energized) a77-716 12/24v power to detectors ul listed control panel initiating loop + + p w r + + + + n.o. c p w r + + n.o. c : observe polarity in power and initiating loops when wiring. note figure 4. top and side views showing position of test switch: a78-2336-03 hold the heat source about 12 inches from the detector in order to avoid damage to the plastic. the detector will r eset 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 under- going maintenance and will be temporarily out of service. disable the zone or system undergoing maintenance to prevent unwanted alarms. a78-2564-05 push recessed switch with a 0.18 max. diameter tool led test module socket recessed test switch c o v e r r e m o v a l c o v e r r e m o v a l
d200-62-00 4 i56-932-12r ? 20 01 system sensor three-year limited warranty sy stem 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, ev en 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 y ou. this warranty gives you specific legal rights, and you may also have other rights which vary from state to state. a78-2565-07 figure 5. removal of cover and screen for cleaning: 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. r eplace 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. removable screen/cover (part no. c58-357-xx)) sensing chamber cover housing yyyyyyyyyyyyy yyyyyyyyyyyyy yyyyyyyyyyyyy yyyyyyyyyyyyy yyyyyyyyyyyyy yyyyyyyyyyyyy yyyyyyyyyyyyy yyyyyyyyyyyyy yyyyyyyyyyyyyy yyyyyyyyyyyyyy yyyyyyyyyyyyyy yyyyyyyyyyyyyy yyyyyyyyyyyyyy yyyyyyyyyyyyyy yyyyyyyyyyyyyy yyyyyyyyyyyyyy y y y y y y y y y
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