July 2018 *Eng-Tips's functionality depends on members receiving e-mail. Additionally, when they are not connected to a fire alarm system, duct detector wiring will not cause a trouble signal if/when they fail due to a wiring fault. Is it sometimes the case that a duct detector is NOT resettable from the FACP? To ensure reliability, we provide supervision and monitoring of critical equipment; however, when duct detectors are required by HVAC rules, they are not required to send signals to where people are on duty to respond, unless a fire alarm evacuation system is also required for that building. In my July issue column, End of Line: Beginning of a Problem? (see www.securityinfowatch.com/12346509), I quoted a section titled, Violation of Duties giving credit to the IBC, when in fact it was from my own states soon-to-be-adopted Ohio Building Code Section 104.4. This quiz is based on the 2019 NFPA 72, 2018 NFPA 90A and 2018 International Building Code (IBC). (7) (a). In NFPA 72-19, remote test switches are simply a convenient functional test mechanism to prove that the AHU will shut down upon device activation per Table 14.4.3.2, Item 20, Interface Equipment at a periodic frequency specified by 14.4.4.4. This device is only required when the duct detector is not resettable from the FACU. Test switches also help ensure that your detectors are working properly. And especially for the installation of air conditioning and heating equipment and components required by code. Current: 0.5 A, max. May 2015, Around here we laminate cardstock color prints for these cheatsheets. It shall be capable of local testing via magnetic switch or remote testing using the UL listed RTC100 Remote Test Coil accessor y with the RTS151 Remote Test Station. We also use third-party cookies that help us analyze and understand how you use this website. September 2016 Yes, if the duct detector cannot be reset at the FACP or annunciator, then a separate test/reset station will need to be installed for resetting the duct detector per NFPA 72 section 23.8.5.4.6.4 . To get started, click a course below or to learn more about Potter Academy, click here. December 2022 Additionally, always follow the code requirements for each project. New comments cannot be posted and votes cannot be cast, Welcome to /r/firealarms September 2021 It is mandatory to procure user consent prior to running these cookies on your website. Just got a call from the field asking if they could mount a remote test switch relatively high on the wall at 7 feet. This implies that most businesses seem to accept the run to failure (RTF) maintenance plan for HVAC systems allow equipment to operate until it breaks. JavaScript is disabled. They are a vital part of a buildings fire safety system and can help save lives in the event of a fire. How well do you know the installation and testing requirements for duct smoke detectors? If a facility only has a few duct detectors, it may not be worth the investment to purchase a test switch. September 2022 June 2020 Thanx for the shout out for the grammar error.we appreciate it. In addition to the testing required in Table 14.4.3.2(g) (1) and Table 14.4.3.2(h), test duct smoke detectors that use sampling tubes to ensure that they will properly sample the airstream in the duct using a method acceptable to the manufacturer or in accordance with their published instructions. By joining you are opting in to receive e-mail. +1 (855) 500-6857 Fire Suppression According to NFPA 72, 14.2.7 you must be both qualified and experienced in the arrangement and operation of any interfaced equipment and any emergency control functions that are part of the fire alarm system. . Available as single-gang controllers or with a second-gang. Required fields are marked *. August 2022 This is especially helpful if your detectors are installed in hard-to-reach places. Likewise, a test plan can say that no duct detectors will be tested or serviced as part of the contract agreement, and that the responsibility for any required T&I will remain with the building owner. AT DUCT DETECTOR METHOD #2 - TED TEST STATION FIGURE 5. The duct shall not . When do Duct Detectors require a RTS remote test? TEST RESET fIGure 1. rtS151 remote teSt StatIon: fIGure 2. Current: 30 mA, max. For example, if the fan motor were to begin smoking the duct detector would, ideally, shut down the system before the fan caught on fire. Green indicates power as well as that the detector board is in place. This website uses cookies to improve your experience while you navigate through the website. If a remote reset station is needed, it simply resets the smoke detector after it has actuated. Every combination of Visual and Audible notification for Duct Smoke Detectors with Key Security or Magnet Remote Testing ability. Where are these required? In those cases we would monitor the dry contacts on the duct detector to cause an alarm or supervisory condition at the main FACP but a reset of the FACP will not reset the duct detector in alarm. Audible and visual alarm indicators, remote status indicators, and remote reset/test switches can be accommodated by the SM-501 Series duct units by connecting to DC voltage output terminals 16 through 21. The Potter Electric PAD300-DUCT duct smoke detector provides early detection of smoke and products of combustion present in air moving through HVAC ducts in commercial, industrial and residential applications. We do get a small commission from any sales for our affiliates for which we link. February 2021 Alarm Bells: NFPA 72G; electric [vibrating,] [single stroke,] [8] [10] [ ] inch bell with Passive Fire Protection What happens when a fan motor catches fire or starts smoking before it catches on fire but continues to operate in some capacity? Of course, everything should be tested multiple times by different authorities to ensure the proper sequence of operation. Turn the key counterclockwise to the RESET position and hold. All good questions, but I'm as confused as you are. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework. Additionally, some municipalities have more stringent codes in place. The pros and cons of duct detector test switches. Download All. Not sure what prompted the question nor what's driving the need to mount it at this level. First, it will send an alarm to alert the facility operator and maintenance staff. It shall be capable of local testing via magnetic switch or remote testing using the RTS151KEY(A) remote test station. Trouble: 16.0 mA max Alarm w/o strobe: 30 mA max Alarm with strobe: 55 mA max Connections: Strip terminal, 14 AWG to 22 AWG wire Wiring Distance: 1000 Feet From Duct Smoke Detector Sounder: 85 dBA at ten feet Temperature: 14F to 140F (-10C to 60C) Humidity: 95% relative humidity; non-condensing You also have the option to opt-out of these cookies. The detector should sound an alarm if it is working properly. Promoting, selling, recruiting, coursework and thesis posting is forbidden. Furthermore, consult the detector installation instructions for additional information. Products December 2019 Of course, the answer is simple. Always ensure you check the latest codes for current information. September 2017 November 2019 In installations where the duct smoke detector's controls and indicators are hidden from view, a remote test station or an LED indicator can be connected to the detector to provide these functions. There are two types of switches that are commonly used with duct detectors: test switches and regular switches. To test the detector, simply press . Additionally, good technicians will educate themselves on the proper installation of an essential component. You're not testing the operation of the duct detector, but you are testing the response of the fire alarm system to a simulated duct detector activation. Copyright 2023 HighPerformanceHVAC.com |. Furthermore, intentions for using duct smoke detectors should not be a substitute for area smoke detectors. Manufactured by System Sensor. Signaling devices shall include: 1. My interpretation of NFPA 72-23.8.5.4.6.4 is that a reset switch is required when the duct detector is not resettable from the FACP. April 2020 Duct detector test switches are devices that are used to test the operation of duct smoke detectors. Reviewed in the United States on October 16, 2014. A smoke duct detector on the supply side will do two things provided it is wired and controlled properly. The purpose of the NFPA 90A is to prevent the spread of smoke and fire through ductwork and ventilation systems for air conditioning and heating systems with high capacities. In air supply systems with a capacity greater than 2000 CFM's downstream of the air filters and upstream of any branch ducts. WIRING DIAGRAM FOR RTS151KEY(A) TO DH100 2-WIRE DUCT SMOKE DETECTOR: NOTE: Terminal 6 of the RTS151KEY(A) is not used when wired to a 2-wire detector. Clear Folder Return2 NFPA 90A 6.4.2.1(2) 1 Installed "downstream of the air filters and ahead of any branch connections in air supply systems". Calculators Always follow duct detector manufacturers instructions and code for wiring. Normally Open or Normally Closed, Duct Detectors Smoke Detection Installation. Use duct tape or other approved method to seal the aerosol smoke entry hole. Temperature: -10C to 60C (14F to 140F) Humidity: 95% RH Non-condensing Max Listing: UL, FM, CE FIGURE 1. But are these test switches really necessary? Resources. without a test switch, it is very difficult to properly assess whether or not a duct detector is working correctly. April 2017 My understanding is that a remote test station is used to test a duct smoke detector without a) smoking it or b) using, say, a magnet on it. Question: Where to place smoke detectors in the ductwork on commercial projects to comply with code? duct detector remote test switch requirementsdiameter and circumference of a soda can in cm. Current requirements: Included in controller specification LED circuit ratings Voltage: 3 Vdc, max. For additional information on Potter Fire Alarm Systems visit ourFire Training Videos Section. When a spot smoke detector gets installed inside of a housing. This category only includes cookies that ensures basic functionalities and security features of the website. These terminals are not supervised and the NFPA 90 states that the smoke detector should be installed in the SUPPLY after 2000 CFM, and IMC 606.2.1 says the RETURN. I would say it is operator preference. An example of data being processed may be a unique identifier stored in a cookie. Please let us know here why this post is inappropriate. And, finally, when is a remote test station required? It shall be capable of providing duct smoke detector status via the UL listed model APA151 Piezo Annunciator. The remote reset will then reset the duct detector allowing the fire alarm system to fully reset. Made in United States. February 2018 Furthermore, the NFPA specifically states that detectors installed in the air duct system shall not be used as a substitute for open-air . However, we recommend installing them anyway. Test switches, magnets, and other forms of testing that do not introduce smoke from the area being protected (i.e., the duct), through the sampling tube and into the detector chamber are not equivalent methods of testing the device per Table 14.4.3.2, 17. May 2018 In an effort of full disclosure, we do have affiliate links on our webpages. If a detector is not working, the test switch can be used to isolate the problem and determine whether it is the detector or the wiring that is at fault. The switches are typically used to test the operation of the detectors alarm, to test the detectors ability to reset itself after an alarm, and to test the detectors ability to perform a self-diagnostic test. Duct smoke detectors work by sampling air currents in air handling equipment to determine if smoke or fumes are present. Keyed switch allows remote testing of the PAD100-DUCTR duct detector. 01 to 64 (64 point control panel) 01 to 127 (127 point control panel) Accessories: Remote test-reset station . Book Review Life Safety Ive had this question asked of me several times. If one senses smoke, the rest will switch their relays, with the triggered detector reporting to the fire alarm panel so the source can be pinpointed. Metal 3D printing has rapidly emerged as a key technology in modern design and manufacturing, so its critical educational institutions include it in their curricula to avoid leaving students at a disadvantage as they enter the workforce. Ive seen bearings seize up and belts spew out smoke until they eventually fail and break. Still, 180 contains no mention of duct detectors. March 2022 Tools Registration on or use of this site constitutes acceptance of our Privacy Policy. Specifications. We accept improvement in any form including via grammar Nazi)))! In those cases a remote test station with remote reset should be installed for the duct detector. Anyone with further comments on this please leave a comment below. Firstly, it is important to follow all the instructions provided with the new duct detector. Brand: Viking FireAlarm.com Part #: 84240 Manufacturer Part #: 23878AE. This Air Products and Controls alarm also has a 78 db at 10 feet horn alarm. February 2022 If it were a manual pull station for the fire alarm panel that would be a different story. Common functions include one or all of the following: BOSCH Security Systems, Inc. * FAD-325 Installation Instructions (HA-06-184. Don't forget about those Remote Alarm LED indicators and key test switches. The code details why smoke detectors are required along with the intentions of installing duct smoke detectors inside the ductwork to comply with code requirements. Discover magazines for computer and electronics enthusiasts. NFPA 90A also states: "Where an approved fire alarm system is installed in a building, the duct smoke detectors shall be connected to the fire alarm . February 2019 These fans are excluded from the above requirements and, ASHRAE Handbook and Product Directory, Fire and Smoke Control, The Fundamentals of HVAC Direct Digital Control. Additionally, some test switches require specialised training to use, which can add to the cost. to 1 ft; ST-50 - Sampling Tube for Ducts 3 ft to 5 ft; WP-2000 - Weather Resistant Enclosure for Duct Housing Our payment security system encrypts your information during transmission. Please use a different way to share. The biggest pro of using a duct detector test switch is that it allows for a much more thorough and accurate test of the device. Last week we explored when duct-detectors are required under the International Mechanical Code (IMC). The consent submitted will only be used for data processing originating from this website. Join your peers on the Internet's largest technical engineering professional community.It's easy to join and it's free. test switch or by the optional remote test station. The detector shall operate at air velocities up to 3000 feet per minute. Duct detector test switches: what are they and do you need them? These cookies will be stored in your browser only with your consent. If you do not understand the code or the requirements ask the engineer or another qualified person on the project. When installing duct-type smoke detectors, they can be installed as described below: (1) Rigid mounting within the duct. The duct smoke detectors latch into alarm state when alarm occurs. In this case, the duct detectors are ignored until they cause the building to get too hot or too cold because the forced air system is not functioning. For testing, the alarm can be enabled by a magnet activated test switch or by the optional remote test station. In short, the answer is no duct detector test switches are not required. Once connected to the fire alarm system, the rules for installation, testing, and inspecting them are covered in NFPA 72 under which compliance is required. Part of this maintenance is testing the function of the systems duct detectors. June 2018 Already a member? Reddit's International Fire Alarm Technicians Sub, Press J to jump to the feed. Course When it comes to fire safety, there is no such thing as being too careful. Includes initial monthly payment and selected options. Login. Refer to the detector installation instructions for additional information. Sometimes the duct smoke detector is pre-wired into the HVAC unit. Click Here to join Eng-Tips and talk with other members! May 2017 Copyright 2023 RYBB - Designed & Powered, SYSTEM SENSOR 2851BTH ELECTRONICS HEAT DETECTOR, System Sensor 2251 Photoelectric Smoke Detector, System Sensor 2W-B Photoelectric 2-Wire Smoke Detector, Download the Specification sheet in *.pdf format. Some can also be interconnected to other duct detectors. rybbfirealarm.com@gmail.com Do you know if it is a code requirement to support sampling tubes greater than 3 at the opposite end of the duct detector? Factory New. July 2016 Just got a call from the field asking if . We'll assume you're ok with this, but you can opt-out if you wish. Description. October 2017 Rather than a RTS I should have listed a Remote indicator switch. Factory New. Flammable & Combustible Liquids This leads to a handful of reader questions: 1. Duct detectors are designed to detect fires within the HVAC system and sound the alarm to give the occupants time to evacuate the building. Lastly, the goal is to detect smoke, shut off the fans, and send out an alarm. info@rybbfirealarm.com May 2022 This will cause the detector to sound an alarm. (Remote Test Switch) NFPA 72 (2002) 72-435.14.5.8 Please let me know if you think my interpretation is correct on this matter. Press question mark to learn the rest of the keyboard shortcuts, [V] Engineer NICET III, EDWARD Specialist. The PAD100-DRTS provides a supervised remote test switch for the PAD100-DUCTR duct detector. My understanding is that a reset switch is used to reset (or "clear") a duct a detector after it has been activated. Have a question, comment, or request? January 2020 ${cardName} not available for the seller you chose. This is a video simplifying the duct smoke detectors, you will commonly see these installed in the duct work on HVAC systems. Test switches are required in order to properly test the detector and ensure that it is functioning correctly. A green LED flashes to indicate power, a red LED signals local alarm indication, and optional accessories offer a variety of annunciation capabilities. We are sorry to hear of the passing of Steve Schilb, longtime employee of Harrington Signal and Potter Electric. Air Products and Controls MSR Series Remote Operation Indicators. November 2020 These links will lead to you purchase a product from another company. RYBB Fire Alarm has installed and is currently servicing a long list of residential and commercial locations in Miami, providing video surveillance, intrusion detection, and fire detection systems. The test switch is used to manually activate the duct detector. For more information or questions about tracking, contact customer service at 800-325-3936. They are not required for the operation of the detector, but they may be used to verify that the detector is working properly. In the meantime, smoke is being spread throughout the supply side and into the facility where people occupy the rooms.
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