Two-Wire Compatibility. Wire the mounting base screw terminals per Figure 3a or Figure 3b, as Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must The detector will drop It will take approximately 80 seconds for the detector to finish the power-up cycle (see Table 2). unit. Access a cross-reference document that covers AV notification appliances, from the previous SpectrAlert Advance line to the latest L-Series line. No Contract Alarm Monitoring starting at $10 a month! Two LEDs on the detector provide a local visual indication of the detectors status: IMPORTANT: This detector must be tested and maintained regularly following Models 2WT-B and 4WT-B also feature a restorable, built-in, fixed temperature Therefore, the only For two-wire models 2W-B and 2WT-B, connect detectors only to compatible alarm control panels as identified by System Sensors compatibility chart. When the sensing chamber gets too dirty and the 2W-B is no longer calibrated to the proper sensitivity, the smoke detector will alert you with a red LED that blinks every five seconds so that you can perform the necessary maintenance. detector to finish the power-up cycle (see Table 2). F 46 | Microsoft VP Marcus Fontoura on Architecting Azure, the "World's Computer" 0:00 / 0:00. The CLSS Tool Suite allows you to perform battery, voltage drop, and Db line loss calculations in a single desktop application. To measure the detectors sensitivity, the i3 Series Model SENS-RDR Infrared DETECTOR Air conditioners, heaters, fans, and fresh air intakes and returns can drive smoke away from the detector. . monoxide(co)/photoelectric smoke detector (4 pages), Manual will be automatically added to "My Manuals", Installation and maintenance instructions, Smoke Alarm System Sensor 4WT-B Installation And Maintenance Instructions, Smoke Alarm System Sensor 2WT-B Installation And Maintenance Instructions, Smoke Alarm System Sensor 2WTR-B Installation And Maintenance Instructions, Smoke Alarm System Sensor 2100ARFT Installation Instructions Manual, Smoke Alarm System Sensor 2251EIS Installation And Maintenance Instructions Manual, Smoke Alarm System Sensor 22051E-RF Installation And Maintenance Instructions Manual, Smoke Alarm System Sensor 2112 Installation And Maintenance Instructions, Smoke Alarm System Sensor FSB-200 Installation And Maintenance Instructions Manual, Smoke Alarm System Sensor BEAM1224 Installation And Maintenance Instructions Manual, Smoke Alarm System Sensor 2351E Installation And Maintenance Instructions, Smoke Alarm System Sensor DH100ACDCLP Installation And Maintenance Instructions Manual, Smoke Alarm System Sensor 2100AT Installation And Maintenance Instructions, Smoke Alarm System Sensor 6500S Installation And Maintenance Instructions Manual, Smoke Alarm System Sensor i4 Series COSMO-2W Installation And Maintenance Instructions, Smoke Alarm System Sensor Innovair flex D4120A Installation And Maintenance Instructions Manual. In no case shall the Company be liable for any consequential or incidental damages for of smoke detectors. Copies of this manual are available from System Sensor at no charge. When the detector is in the, alarm mode, the red LED latches on. Once the mounting base is installed, the 2W-B smoke detector attaches to the base by simply inserting the head and turning it clockwise until it locks in place. Before Installing It appears that these two models are very similar in their features (neither has a sounder, both operate at 12 or 24 Volts) so this should be a satisfactory replacement. Blink 10 sec Figure 4: Recessed Test Switch Opening and SENS-RDR Position Please include a FireAlarm.com is always at the forefront of the fire & life safety industry offering the most diverse selection of technologies, offerings, and services - all for you to take advantage of FireAlarm.com is able to offer everything from Fire Alarm System Installation and Security Camera Surveillance, all the way to 24/7/365 Central Station Monitoring and Cellular Signal Transmission . Alarm Reset Time: Condition It can connect with a Honeywell VISTA System at Zone 1. 8.5 8.5 Volts Improper connections can prevent a system from responding properly in the event of a fire. System Sensor offers world-class fire detection and notification solutions System Sensor Founded in 1984, System Sensor is a global manufacturer of fire and life safety devices, specializing in smoke detection, carbon monoxide detection, and notification technology for world-wide applications. Copies of this manual are available, NOTICE: This manual shall be left with the owner/user of this, IMPORTANT: This detector must be tested and maintained regu-, larly following NFPA 72 requirements. The mounting base installation is further simplified by the incorporation of features compatible with drywall fasteners. z7$m9ymnsx.}]{~{^^}ltW? Hey, guys. System Sensor does not provide any design or engineering services. *Assumes the panels alarm verification reset time is 10 seconds or less. applicable. Disable the zone System Sensor is pleased to provide this Strobe Coverage Calculator, formerly known as Equivalent Facilitation Calculator. No agent, representative, dealer, or employee of the Company has the authority to Green LED. Now it's easy to identify System Sensor bases that are compatible with individiual OEM detectors. Save 6% at checkout. 100 $59.99. Figure 3a: Wiring Diagram, 2W-B and 2WT-B. item 3 System Sensor 2W-B 2WB i3 Series 2-wire Photoelectric Smoke Detector System Sensor 2W-B 2WB i3 Series 2-wire Photoelectric Smoke Detector. 2-Wire i3 Detector Wired in Style D Configuration: B. hbbd```b``6@$&"%H Wiring Installation Guidelines 3. any latin characters (a-z, A-Z) any numbers (0-9) special characters ("-", "_" and ". A, System Sensor i3 series 2w-b, 2wt-b, 4w-b, 4wt-b Data Sheet. Alarm, Red LED IMPORTANT: This detector must be tested and maintained regularly following NFPA 72 requirements. Twisted pair may be used to provide additional protection against extraneous electrical interference. accept any interference received, including interference that may cause undesired operation. (135F) thermal detector and are also capable of sensing a freeze condition if NOTE: Before performing maintenance on the detector, notify the proper authorities that maintenance is being performed and the system will be temporarily out of service. to prevent any unwanted alarms. conduit; do not mix fire alarm system wiring in the same conduit as any other Near fresh air inlets or returns or excessively drafty areas. NOTE: If, during power-up, the detector determines there is excessive electrical noise in the system such as those caused by improper grounding of the system or the conduit, both LEDs will blink for up to 4 minutes before displaying detector status (see Table 2). Fill out the form and we'll contact you shortly. Table 2: Power-up Sequence for LED Status Indication* (For 2W-B and 2WT-B, panel must limit current) Blink 5 sec It should be straightforward if you do not need to wire the back plate. Reset all the detectors at the alarm control unit. Enter a zip code, select a range, and choose a Distributor type to locate the nearest Distributor. power is applied to the smoke detector. 1050 0 obj <>stream 4.8 out of 5 stars based on 20 product ratings, 4.8 out of 5 stars based on 166 product ratings, 4.9 out of 5 stars based on 174 product ratings, 4.8 out of 5 stars based on 175 product ratings, 4.8 out of 5 stars based on 190 product ratings, 5.0 out of 5 stars based on 1 product rating. The cable companies often use a special adapter to monitor a VISTA-20P system as explained at https://www.alarmgrid.com/videos/how-to-safely-remove-an-icontrol-from-an-existing-system. 1. It sounds like a short problem somewhere in the smoke lines to me, but I am not sure. B401B / B406B / B110LP / B116LP A 120 System Sensor 2800 A Photo N/A N/A 120 System Sensor 2800TH A Photo / Therm. Twisted pair may be used to provide additional protection The 2W-B smoke detector consists of a mounting base that can be mounted on a single gang box, a three and a half or four inch octagonal box or a four inch square box with a plaster ring. All System Sensor i3 Series smoke detectors are designed for easy installation, advanced detection and fast inspection. Models: 2W-B, 2WT-B, 4W-B, 4WT-B. Should it become necessary, the screen/sensing chamber is field replaceable. list is available from System Sensor upon request. Freeze Trouble (Model 2WT-B and 4WT-B): If a detector fails any of the above test methods, its wiring should be checked The microprocessor allows the detector to automatically adjust its Thank you for the response @disqus_YuNiL6S1Rn:disqus. Fire Alarm Systems | System Sensor L-series indoor horn/strobes System Sensor L-series indoor horn/ strobes www.boschsecurity.com u u Plug-in design with minimal intrusion into the back box u Field-selectable candela settings of 15 or 30 cd at 12 V or 15, 30, 75, 95, 110, 135, and 185 cd at 24 V u Horn rated at 88+ dBA at 16 V Rotary switch for horn tone and two volume settings or damage is caused by the Companys negligence or fault. It should connect the same exact way. Any advice/help would be greatly appreciated. To a single gang box, or After phoning System Sensors toll free number 800-SENSOR2 (736-7672) for a Return While the drift compensation and smoothing algorithms make the 2W-B more advanced than other conventional smoke detectors, it will eventually need to be cleaned. Peak Standby Current: The 2W-B is a 2-wire, photoelectric i3 smoke detector. However, you can also use the 2W-B smoke detector with other alarm control panels, but you should verify compatibility with the manufacturer of the alarm control panel first. Applications Guide for System Smoke Detectors, which provides detailed information on detector spacing, placement, zoning, wiring, and special applications. Light settings: The brightness sensor is activated, it automatically switches between daytime General Technical details Weight & dimensions Operational conditions Power Power source AC/DC show more Frequently Asked Questions Can't find the answer to your question in the manual? Improper connections can All models incorporate a state-of-the-art optical sensing, chamber and an advanced microprocessor. In or near areas where particles of combustion are normally present NIB!! Comment When low beam is activated, it's possible to change into high beam by pushing the wire remote. There are no express or implied warranties of any kind with this calculator. Initial LEDStatus Indication The System Sensor COSMO-2W is a best-in-class i4 Series combination CO/Smoke detector is a 2-Wire carbon monoxide (CO) and smoke detection technology in a single, system-connected device. the removal of detectors before beginning construction or other dust producing activity. tor. System Voltage Nominal: 0 They also answer your questions from the comfort of home or the office. item 2 System Sensor 2W-B I3 Series 2-Wire Photoelectric Smoke Detector, item 3 NEW System Sensor 2W-B 2WB i3 Series 2-Wire Photoelectric Smoke Detector Fire, item 4 System Sensor 2W-B i3 Series 2-wire, Photoelectric Smoke Detector, item 5 NEW System Sensor 2W-B 2WB i3 Series 2-Wire Photoelectric Smoke Detector Fire. Min. Installation of the 2W-B, 2WT-B, 4W-B, and 4WT-B detectors is simplified by Place detector on the base and rotate clockwise. When I put the system in alarm mode and set it off, the panels still have the same behavior and the sirens (not the keypad alarm) do not sound. Vacuum or use canned air to remove any dust or particles that are present on both chamber halves. Direct mount or to ceiling using drywall fasteners (Figure 2). System Sensor products are designed and manufactured to meet or exceed various product safety and certification requirements. The i3 Series heads and bases are keyed so that a 2-wire head will only mount to a 2-wire base, and a 4-wire head will only mount to a 4-wire base. NOTE: For the above tests, the detector will reset only after the power source Certain System Sensor SWIFT AV bases have the potential to generate a premature and erroneous low battery notification. 7. Hold a smoldering punk stick or cotton wick at the side of the detector and It sounds like you may be experiencing a low battery issue possibly. The i3 Series detectors include a tamper-resistant feature that prevents removal from the mounting base without the use of a tool. endstream endobj 473 0 obj <> endobj 474 0 obj <> endobj 475 0 obj <> endobj 476 0 obj <> endobj 477 0 obj <> endobj 478 0 obj <>stream Our hardwired CO detectors with RealTest use electrochemical sensors to measure carbon monoxide levels and alert residents with a flashing Temp-4 signal alarm. Remove the top half of the screen/sensing chamber by lifting straight up Direct mount or to ceiling using drywall fasteners (Figure 2). Subscirbe to specific System Sensor email communications. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to Enter your email address and check your inbox. (See Figure 4.). I still get the "shorted out keypad". 5. No Contract Alarm Monitoring starting at $10 a month! Using a 1000-1500 watt hair dryer, direct the heat toward either of the thermistors. We're here to help with any issues or questions. The heads and bases are clearly identified as either 2-wire or 4-wire. The screw terminals in the mounting base will accept 1422 gauge wire. System Sensor is not selling, supporting or endorsing AFMGs EASE Evac voice evacuation software. Two-wire System Sensors intelligent and conventional modules are designed to help you meet a wide range of application requirements. Ready to learn more? 2WTA-B, or 2WTR-B) on Style D IDCs is to use a 2W-MOD2 module. Subscirbe to specific System Sensor email communications. 5. Table 2: Power-up Sequence for LED Status Indication*, (if excessive electrical noise is present). Each zone provides only enough alarm current (20ma) to power one smoke in alarmed state. A05-0395-007 4/09 #2132 SpectrAlert Advance Dimensions Model Description Wall Horn Strobes P2R* 2-Wire Horn Strobe, Standard cd, Red the latest products, and offers. Maximum Ripple Voltage: 30% of nominal (peak to peak), Alarm Current: 130mA max., limited by panel, Standby Current: 50 A max. At a minimum, cleaning should be performed annually. which provides detailed information on detector spacing, placement, zoning, wiring, and special applications. . View a list of all System Sensor locations worldwide. If they are not just take a photo of the connections and land what is connected to the positive connection the new plates positive and same with the negative. Testing This latest software also includes an enhanced interface for increased ease of use. unreasonable use, modifications, or alterations occurring after the date of manufacture. 2009 System Sensor. C. Direct Heat Method (models 2WT-B and 4WT-B only) best system performance, all wiring should be installed in separate grounded A copy of this list is available from System Sensor upon request. H\@}&&u/tc1.|UH*_7]}8s5CC)^.+Jj__}}}weqxes;,64qh{>?bxN}9_iIg]9.oM:,=nKE%ml)R.g")d6KO)\1WK%yaycN,Y`.K3{daal4{=fOW)=#=#=SoB#. We are notifying you about EASE Evac as a service to our customers as it may simplify voice evacuation design. 2. indicate a need for cleaning, replacement, or a fr eeze condition (2WT -B only) at the control panel or module. and workmanship under normal use and service for a period of three years from date I am not of the exact model number of the existing 2-wire smoke detector so I cannot say for sure if the back plates are the same. Similar Part No. ANSI/UL 1971 does not provide ratings for each angle based on actual test results.". Leave everything as is at the panel and simply replace the smoke detector itself. Visit systemsensor.com for current product information, including the latest version of this data sheet. When performing maintenance on your smoke detector, simply turn the 2W-B head counter clockwise to remove it from the base. A fasteners. I've seen three different mri rooms using system sensor 2wb smokes tied to a zone module. We offer conventional and intelligent products for smoke detection, heat detection, fire and CO combination detection, and multi-criteria / multi-sensor detection, as well as bases and accessories. FCC Statement Car & Truck Safety & Security Accessories. Series 2W-MOD module (refer to installation manual D500-46-00), the 2W-B and 2WT-B are capable of generating a "maintenance. 4 to 158F (20 to 70C) It will take approximately 80 seconds for the J#_l Uf! z8wE]Kz[]~F$e.7 0hHJUm0C TXopU* 8CC]s9AdZJ:>iSiO8hwRYlY goih5KN&XIJe\[% : System Sensor offers world-class fire detection and notification solutions. Some parts of this page is temporarily unavailable. For Authority Having Jurisdiction. The mounting base installation is further simplified by. %%EOF When the detector is in the alarm mode, the red LED latches on. Will these cover up a low voltage mudring? System Sensors intelligent and conventional modules are designed to help you meet a wide range of application requirements. This Warranty gives you specific legal rights, and you Do these detectors have a similar lifespan? ey+L) l\q8e)2FWfQCCvBm Yrsza G( Vc Gz;?TP!k5UY6m}*i*OGWfMPMN O_\mV=}gj{sf! tLC>[PWGq9 p Two LEDs on the detector provide a local visual indication of the detectors status: After an initial power-up delay, the red and green LEDs will blink synchronously once every ten seconds. for the detector to stabilize before testing. NOTE: Style. way to insure proper operation of 2-wire i3 smoke detectors (2W-B, 2WT-B, Gray. If the detector is in need of maintenance because its sensitivity has shifted outside the listed limits, the red LED blinks once every five seconds. Max. Connectivity. This chart contains the 15 sec Users of this calculator are solely responsible for their own selection and use of products based upon information contained in this calculator and any calculations from this calculator. Photoelectric smoke detectors work with an alarm system, and when properly maintained and tested, can last for an indefinite period and do not automatically require replacement after a certain period of time like smoke alarms and CO detectors do. Reorient or relocate the receiving antenna. The 2W-B smoke detector works with most Honeywell alarm control panels including the VISTA-20P and VISTA-21iP as System Sensor is a subsidiary of Honeywell. 4W-B and 4WT-B are 4-wire photoelectric smoke detectors. If the detector is within the listed sensitivity limits, the detectors red Just fill out the form and click your area of interest. Operating Humidity Range: System Sensor 2W-B Product Specifications: System Sensor 2W-B Product Compatibility: Plug-in detector line, mounting base included, Mounts to octagonal and single-gang back boxes, 4-square back boxes, or direct to ceiling, Drift compensation and smoothing algorithms. In a freeze trouble condition, the red LED will blink once every 10 seconds (refer to Table 1). optional Model RA400Z Remote Annunciator to be connected. We're here to help with any issues or questions. Notify the proper authorities that the system is in operation. Heat Sensor (Model 2WT-B and 4WT-B): 135F (57.2C) Freeze Trouble (Model 2WT-B and 4WT-B): 41F (5C) Operating Temperature Range: 2W-B and 4W-B: 32 to 120F (0 to 49C) 2WT-B and 4WT-B: 32 to 100F (0 to 37.8C) Operating Humidity Range: 0 to 95% RH non-condensing Storage Temperature Range: -4 to 158F (-20 to 70C) Diameter (including base): Installation of the 2W-B, 2WT-B, 4W-B, and 4WT-B detectors is simplified by the use of a mounting base that may be pre-wired to the system, allowing the detector to be easily installed or removed. To remove the detector from the base once it 12/24 Volts Non-polarized for System Smoke Detectors, which provides detailed information on detector Models 2W-B and 2WT-B also include an output that allows an optional Model against extraneous electrical interference. Access all of System Sensor's tools and software offerings. needed" signal. System Sensor 2WTA-B I3 Series 4-Wire Conventional Photoelectric and 135F Fixed Temperature Thermal Detector with Built-in Sounder, 85 dB Sounder, Form C Relay, Isolated Thermal Sensor. Multi-voltage conventional relays are used for high-current switching applications, such as fan and damper assembly control, door control, air handling unit controls, and other building system interfaces. Standby Current: You can also remove the detector cover and the sensing chamber for convenient smoke detector cleaning. With less intelligent smoke detectors, a dirty photoelectric chamber will results in false alarms. It would be hard to rate this product at one star unless it was somehow responsible for an unreported house fire. There is a red and green LED on the head of the 2W-B smoke detector. This will get the device to stop sounding. InnovairFlex duct smoke detectors combine an impressive collection of innovations to greatly simplify HVAC system monitoring. Replace the top half of the screen/sensing chamber by aligning the arrow A copy of this DIAMETER TOOL, Figure 5: Removing/Replacing Screen/Sensing Chamber detector which is found to be defective in materials or workmanship under normal use endstream endobj 1001 0 obj <>>>/EncryptMetadata false/Filter/Standard/Length 128/O(19[nMM\\.9rvXbp)/P -1036/R 4/StmF/StdCF/StrF/StdCF/U(bH;^Soe9ACM )/V 4>> endobj 1002 0 obj <> endobj 1003 0 obj <>/ExtGState<>/Font<>/ProcSet[/PDF/Text/ImageB]/XObject<>>>/Rotate 0/Type/Page>> endobj 1004 0 obj <>stream InnovairFlex duct smoke detectors combine an impressive collection of innovations to greatly simplify HVAC system monitoring. identifier located on the label on the back of the product. 0.1 All wiring must be installed in compliance with the National Electrical Code, I am wondering if there is too much power connected to the panel for the sirens to sound. Should The LED indication must not, be used in lieu of the tests specified under Testing. Wire connections are made by stripping approximately 14-inch of insulation from the end of the feed wire, inserting it into the proper base terminal, and tightening the screw to secure the wire in place. Models 2WT-B and 4WT-B also feature a restorable, built-in, fixed temperature (135F) thermal detector and are also capable of sensing a freeze condition if the temperature is below 41F. Do NOT Install Detectors in the Following Areas: Three-Year Limited Warranty When the alarm goes off, both keypads seem like they short out for a second (the display panel goes blank the ready and arm lights flash, and it makes a weird beeping noise) then starts the alarm tone at the keypads only. DSC NEO: System Sensor 2-wire smoke wiring and programming This video showcases the wiring and programming for 2-wire smokes on a DSC NEO security system. maintenance or screen replacement. 30 has been momentarily interrupted. System Sensors AV notification devices are the most versatile, easy to install, and cohesive line of audible visual (AV) notification appliances in the industry. Test Switch Locking Pin. System Sensor 2W-B Photoelectric i3 Smoke Detector, 2-Wire In Stock Other products from System Sensor System Sensor P4W-P Horn Strobe, White, Wall Mount, Four-Wire System Sensor PC2W Horn Strobe, White, Ceiling Mount, Two-Wire, FIRE Lettering System Sensor B210LP Detector Base, Plug-In B101B / B107B A 120 2.0 inches At a minimum, cleaning, Models 2W-B and 2WT-B are 2-wire photoelectric smoke detec-, tors; models 4W-B and 4WT-B are 4-wire photoelectric smoke, detectors. COVER. 6. and turning it clockwise until it snaps into place. it become necessary, the screen/sensing chamber is field replaceable. The i3 Series heads and bases are keyed so that a 2-wire head will only mount Weight: exclusion or limitation of incidental or consequential damages, so the above limitation condition if the temperature is below 41F. : This device complies with part 15 of the FCC Rules. WIRING DIAGRAMS FIGURE 3A: WIRING DIAGRAM, 2W-B AND 2WT-B 2 . St. Charles, Illinois 60174. Have feedback about a particular System Sensor product? Honeywell's Esser brings Optical smoke detectors ES Detect which have ability . LED should light within five seconds. In a freeze trouble condition, the red LED will blink once every 10 seconds (refer to Table 1). current list of detectors and UL Listed compatible control units. System Sensor web site at www.systemsensor.com. However, there is no guarantee that interference will not occur in a particular installation. The System Sensor 2W-B is a 2-wire smoke detector and a member of System Sensors i3 Series of photoelectric smoke detectors. System Sensor - Technical Field Bulletin Life Expectancy of System Smoke Detectors - Dated 05/2012, Limitations of Fire Alarm Systems - Dated 5/13 Rev. Explore System Sensor products including: AV Notification, Beam Smoke detection, CO detection, HVAC Smoke detection, spot smoke detection, relays, & modules. Series detectors are designed to provide open area protec-, tion. alarm verification. Figure 3a: Wiring Diagram, 2W-B and 2WT-B. and service during the three year period commencing with the date of manufacture. To view our listings, please visit one of the following sites. 1. Remove the detector cover by turning counterclockwise. 0.3 sec Each i3 Series detector is supplied with a mounting base that can be 135F (57.2C) the listed limits, the red LED blinks once every five seconds. For convenience, the 2W-B mounting base can also be directly mounted to the ceiling using drywall fasteners. I would like to replace it with similar 4 wire detector like the 4WT-B detector and wanted to check if they are compatible? NOTICE: This manual shall be left with the owner/user of this equipment. Consult NFPA 72, the local Authority Having Jurisdiction (AHJ), and/or applicable codes for specific information regarding the spacing and placement Voltage Drop calculations for System Sensor AV products can be done using the Honeywell Online Tools for Fire (HOTFire) site. Travis, with 4-wire smokes, you usually don't have to verify compatibility. The 2W-MOD can Dimensions: 2.0" (51mm) H x 5.3" (127mm) Dia. into the base and lock into place with a click. HOTFire is a free online site that helps users quickly plan and model notification appliance circuits (NACs) using the entire line of SpectrAlert Advance and L-Series. system sensor.com is the site link for a current list of all UL listed compatible smoke detectors. Preview PDF Download HTML 2W-B Datasheet (PDF) - Systemsensor advanced ideas. Any 2-wire i3 smoke detector (2W-B, 2WT-B, 2WTA-B, or 2WTRB) wired further simplified by the incorporation of features compatible with drywall The calculator was programmed to assist you in the design of audible/visible notification device circuits. Models 2W-B and 2WT-B are 2-wire photoelectric smoke detectors; models 4W-B and 4WT-B are 4-wire photoelectric smoke detectors. has been made tamper resistant, use a small screwdriver to depress the square This is because fire alarm control panels vary by Wd]_c'F1p% Wire connections are made by stripping approximately 14-inch of insulation Power must be removed from the detector Diameter (including base): 4-Wire Smoke Detector with 135F Fixed Heat Sensor, 2-Wire Smoke Detector with Fixed Heat Sensor, System Sensor 2W-B, 2WT-B, 4W-B & 4WT-B - Installation Guide.

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