The fusible link is the mechanism that holds the damper blades in the open position. Fusible links are temperature sensitive release mechanisms designed to be part of a variety of fire protection systems. The fdl can be installed in rectangular or circular ducts. The fusible link attached to the damper would then melt, causing. As market leader in the uk manufacture of fire, smoke and air control products, including a full range of fire dampers, volume control dampers and fire smoke dampers we have successfully fulfilled this daunting brief without faltering once in our 41year history. The system is activated when the ambient temperature increases to the. That documentation needs to be provided to the code official upon request. The overcenterknee lock with high torque springfusible link assures failsafe closure during fire conditions under airflow. The model ea fusible link was specifically designed for curtain type fire dampers and underwriters laboratories listed fire doors. In rooms where the normal temperature of the room is consistently higher, a higher degree fusible link would. Dayton fusible link, actual width 12, actual size height 1.
An additional solution for round ducts is the use of a true round fire damper. Fms guide to testing and maintaining fire dampers wireless fire damper. Fire and smoke dampers are fitted in ductwork where it passes through a fire compartment barrier, for example at fire rated walls and floors. Fusible link 165 degree dayton 2tgj3 for fire dampers. Mark the location of the dampers on drawings, autocad plotting available. Manually activate electric smoke dampers and pneumatic smoke dampers to ensure that the actuator is operable. When links are used in a restaurant system, their purpose is to cause the system to function and extinguish the fire. Description fusible links are temperature sensitive release mechanisms designed to be part of a variety of fire protection systems. The fire damper opens automatically when the fuse has been changed and the operating voltage to the motor is reestablished. How to properly inspect and test fire dampers facilities. Basically when the fusible link comes into contact with high heat, the link will melt, causing the damper to close and stop the spread of fire. Their correct installation and detailing is therefore essential to realising the fire safety performance of the whole building. A fire damper can be defined as a device installed in ducts and air transfer opening. A facility managers guide to testing and maintaining fire.
Most fire dampers have fusible links that melt at typically 165f 74c allowing gravity or a shaft spring to close the damper. Quite often installed fire damper devices have a fusible link, which is defined by bs 99999 as a device that releases a component such as a fire damper or fire shutter at a set temperature. Fms guide to testing and maintaining fire dampers fire safety. Fire damper testing and maintenance kimpton energy solutions. Round fire damper allows the fusible link to be replaced easily then the damper can be adjusted to its fullopen position. Fire damper testing urmson fire specialists rj urmson. Guide for facility managers on the testing and maintenance of fire. The fusible link attached to the damper would then melt, causing the dampers door to close. Besides the damper test required by nfpa 105, nfpa 72 requires an annual test of the spottype smoke detector or duct detector that activates the smoke damper. When the fuse link opens, the damper blades close and prevent the spread of fire for a set amount of time. Fusible link damper in apartment range hood exhaust. Code required for testing of fire, smoke, and combination dampers. The electro thermal link etl is a multipurpose dual responsive fusible link release device. Most of these mechanical devices have a fusible link, which is defined by bs 99999 as a device that releases a component such as a fire damper or fire shutter at a set temperature.
Drop testing of fusible link fire dampers including photographic evidence of testing. The maximum ambient temperature rating for the link that is greater than the maximum ambient exposure temperature at the fire door. The above pricing packages are examples based on three actionpac lns panels at a single site, with a minimum of 25 fire and smoke dampers all connected to dedicated actionpac intelligent damper control panels with adequate access to service at least 25 dampers per day. These relatchable fire links offer many advantages over the fusible variety. Jan 31, 2015 the fusible link is one of the simplest forms of heat detection devices. All motorized dampers are dynamic rated and may be used in place of any static or dynamic curtain blade fire damper. Fd damper installation, operating and maintenance instructions.
After the damper closes, it is reopened and the fuse link replaced. Inspect all fusible link operated dampers at least every two years and operate them every four years unlike motor operated dampers fusible link operated dampers cannot be cycled open and closed without accessing the damper and manually removing and reinstalling the fusible link. Check damper label reference, damper size, fusible link option and temperature to sitespecification. Fire damper maintenance legislation ductbusters uk. In general, a fire damper works when the heat from the fire causes the normal temperature of a room to rise to about 165 degrees fahrenheit. Maintenance simulated fire closure nonspring assisted dampers operate the damper by removing the fusible link or by melting the fusible link with a heat source and allowing the blades to drop or close. This underwriters laboratories approved product is constructed from terne plated steel. Technicians should visually inspect fire dampers in accordance with the testing schedule outlined by nfpa 80 unless the facility or local authority having. Like all opening protectives, continued maintenance and inspection is critical and will help ensure that the doors, windows, shutters, dampers, etc.
Links will release at the temperature embossed onto the link itself. Control panel maintenance maintenance of actionpac control panels, including training, software upgrades and hardware maintenance. Once the damper has proven to close, it is reopened and the fuse link. The overcenterknee lock with high torque spring fusible link assures failsafe closure during fire conditions under airflow. Some links are liquid filled glass bulbs, and some are pieces of metal soldered together. The above pricing packages are examples based on three actionpac lns panels at a single site, with a minimum of 25 fire and smoke dampers all. Dynamic, multiple blade fire dampers provide another solution to the access and maintenance issues posed by dynamic curtain blade dampers. Halton fdl fire dampers are typeapproved class a0a60 fire dampers for use in offshore, marine and navy ventilation systems. Operational testing normally involves removing or melting the fusible link and letting the damper close.
As market leader in the uk manufacture of fire, smoke and air control products, including a full range of fire dampers, volume control dampers and firesmoke dampers we have successfully fulfilled. The fire damper opens automatically when the fuse has been changed and the. Never install a fire damper without the proper ul approved fusible link in place. Fire damper surveys and maintenance checkmate fire.
Gemini fire is part of the gemini ampm asset management and planned maintenance group of companies who offer a fire damper testing, cleaning and maintenance service, in accordance with bs. The system is activated when the ambient temperature increases to the point that causes the eutectic alloy, holding the fusible link together, to melt and release the preloaded fire damper, door or shutter, thus restricting the spread of fire or smoke. Fusible link temperature set points of 165f, 212f, or 286f the fusible link is the mechanism that holds the damper blades in the open position. For healthcare occupancies, the damper inspectiontesting requirement has been moved by the national fire protection association nfpa from nfpa 90a to nfpa 80. Inspect all fusible link operated dampers at least every two years and operate them every four years unlike motor.
Fire and smoke dampers are fitted in ductwork where it passes through a fire compartment barrier, for example at firerated walls and floors. Looking for dayton fusible link, actual width 12, actual size height 112 2tgj3. A fire damper is a device installed in ducts and air transfer openings of an air distribution or smoke control system that is designed to close automatically upon detection of heat. The size of the link and the load rating in pounds for the link. The challenge for maintenance and engineering managers is to understand the gamut of issues related to damper installation and performance, including inspection, testing, and maintenance. Control panel maintenance maintenance of actionpac control panels, including training, software upgrades and. If the fuse link reaches the temperature set point the fuse link will open.
For example, an ordinary fusible link rated at 165 degrees f has a maximum ambient temperature rating of 100. Caution avoid injury keep clear of blade travel path. Fsd series combination fire and smoke dampers are by. The use of electromagnets or solenoids enables the damper to be operated remotely, even when not exposed to elevated temperatures. Basically when the fusible link comes into contact with high heat, it will melt, causing the damper to close and stop the spread of fire. Because it can be more easily maintained compared to a standard fire damper, a motorized fire or fire smoke damper contributes to maintenance and insurance savings. Discussion in mechanical codes started by badeeba, nov 30. First, an operational test must be completed after the installation of the fire damper is complete. Fusible links are rated by release temperature, and the load they will withstand. Where a fusible link is installed on a combination fire smoke damper, the fusible link shall be removed for testing the damper for full closure simulating a fire condition per the requirements and frequencies of 19. As with testing dynamic fire dampers, testing a smoke damper should be done under normal airflow conditions to confirm no impediment to operation exists due to rust or damaged blades. The d1250 series is approved for use in both static and dynamic hvac system designs, and is an economical and versatile performer, available with a factory fitted sleeve and choice of transition styles, suitable for use. Multiple blade fire dampers are easy to test and rest, because the blades can be operated and held open via a hand lever or pair of pliers while the fuse link is replaced. Fusible link fire dampers are designed to operate without any command from an operatorsystem.
If youre installing a listed damper, it will need to be maintained in accordance with its listing and the appropriate provisions of the fire code and property maintenance code. The d1250 series is approved for use in both static and dynamic hvac. The temperature rating of the standard fusible link is 165 f. Maintenance simulated fire closure nonspring assisted dampers operate the damper by removing the fusible link or by melting the fusible link with a heat source and allowing the blades to drop or close naturally. Automatic damper testing testing of automatic dampers from a control panel and a physical inspection in accordance with latest. Some links are liquid filled glass bulbs, and some are pieces. Nailor 0100, 0200, 0300, and 0500 series static curtain fire dampers, for use in static fans off systems where the hvac system shuts down in the event of a fire, are ul approved to provide 1. The fdl dampers are used to prevent the spread of fire within the ventilation ductwork. Mar 22, 20 like all opening protectives, continued maintenance and inspection is critical and will help ensure that the doors, windows, shutters, dampers, etc. The g fusible link is a mechanical heat activated device. Guide for facility managers on the testing and maintenance. Fire and smoke damper testing and inspection explained. Check damper label reference, damper size, fusible link option and. Can be relatched does not need replacing pretested.
This is a 165 degree fahrenheit fusible link replacement that is primarily used for fire dampers, and more popular with dayton, but also with lloyd industries, and ruskin dampers that are intended to close automatically to help prevent the spread of flames with the help of this fusible link. Fms guide to testing and maintaining fire dampers fire. An alternative option for activation is via electrically. Gemini fire is part of the gemini ampm asset management and planned maintenance group of companies who offer a fire damper testing, cleaning and maintenance service, in accordance with bs 9999. Ruskins classic inspector consists of a panel pc, ups and preloaded software. The fire damper opens automatically when the fuse has been changed and the pneumatic air supply is reestablished. Visually inspect the link to verify its not damaged. Guide for facility managers on the testing and maintenance of. They also need to confirm that the fusible link has not been painted or.
Fusible links for fire dampers by globe technologies. Dayton fusible link, actual width 12, actual size height. Fire damper surveys and maintenance fire resisting ducting together with dampers are carefully designed to prevent the spread of fire and smoke within a building. May 18, 2017 because it can be more easily maintained compared to a standard fire damper, a motorized fire or fire smoke damper contributes to maintenance and insurance savings. Bimetals operate in the time and 17% less air temperature. Testing and maintenance of fire dampers, especially dynamic, curtain fire dampers, can be extremely difficult. Shut down your fire dampers using bimetal or signal actuation instead of fusible links. Galvanized metal sleeves in lengths of 12, 14 or 16 and metal gauges of 20 ga. On a fire damper, the locking ramp catches and locks the leading blade of the. In the most common design, a fusible link holds a springloaded shutter open. There are also different lengths of the fusible links. Easy online ordering for the ones who get it done along with 247 customer. Fusible link are inspected for signs of wear and replaced as required.
Fusible links used in this manner are actually releasing devices that are heat actuated. The system is activated when the ambient temperature increases to the point that causes the eutectic alloy in the fusible link to melt and release the preloaded fire protection device, thus restricting the spread of fire or smoke, or release pressurised gas or. Swegon service price all projects on a projectsite basis. Its available in 4 temperatures and has a maximum load of 25 pounds. The fusible link is one of the simplest forms of heat detection devices. When the fusible link opens, it releases the damper components to close, and they will stay closed until a new fusible link is installed. Facility management coverage relating to fire safety, firelife safety, fire. The maximum ambient temperature rating for the link that is greater than the maximum ambient exposure. This is a 165 degree fahrenheit fusible link replacement that is primarily used for fire dampers, and more popular with dayton, but also with lloyd industries, and ruskin dampers that are intended to close.
They are designed to shut when a specified temperature or fire smoke condition is met, preventing the spread of fire and smoke. They are designed to shut when a specified temperature or. Installation, operating and maintenance instructions. The system is activated when the ambient temperature increases to. Learn about fire and life safety, fire damper, fire and related trends for. The fusible link portion functions identically to that of an ordinary fusible link.
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