A fusible link is a short piece of insulated lowvoltage cable within an automotive wiring harness that is. Fusible link replacement automotive dslreports forums. Zep dyna clean installation and operators manual 5 rev 111111 iv. Fusible link replacement, 14 ga brown american autowire. Fusible links are rated by release temperature, and the load they will withstand. Nfpa 80 2010 standard for fire doors and other opening protectives tia log no.
Can a fusible link be used to replace a fuse that blows frequently. What is a fusible link and how do you repair one in your car. A fusible link is a protective device used in an electrical circuit. A service tag on every link of the installation date and year of manufacture. Visually inspect the link to verify its not damaged. The fusible alloy that is used in the manufacturing of the fusible links undergoes a phenomenon known as creep or cold flow. Manually open the vent doors by pulling the roof level release.
The trash chute fire discharge assembly must be held open by a current year ul approved fusible link and the assembly must be tested at least once per year for self closure in the event of a fire melting the fusible link. A fusible link acts much like a fuse, only its designed to handle a different type of potentially hazardous scenario. The two halves of the link are then separated by the tension force exerted by the continuous duty load. Once the fusible link is removed it shall be verified that the damper closes completely without assistance. Fusible links are a vital part of a fire protection program.
Install replacement fusible link between the latch and the equalizer spring. My fusible links are original and still look decent. When the current increases beyond a certain amperage, the fusible metal of the wire link melts, thus breaking the electrical circuit and preventing further damage to other components and wiring. Fusible link facts call us today for a free inspection. The guillotine requires replacement when any of the following conditions exist. The fusible link manufacturer recommends annual replacement of links as part of a regular maintenance schedule. Fusible links are always smaller in size than the wire of the circuit in which. The insulation of a fusible link is a special nonflammable material. Fusible link 2 off 3245605 te ns io spr g shackle 2 off t an k br c et 2 o f 2. Fusible link lid closure fusible link arm assembly bk. The fusible link is a short length of wire that is smaller in gauge than the wire in the protected circuit. Turn on the switch located on the right side of the machine to start the flow of solvent.
Rotate the linkage shaft, it will only move in one direction, to compress the coil spring and bring the link pins closer together. Fusible links that are found to be exhibiting signs of corrosion must be replaced. For example, an ordinary fusible link rated at 165 degrees f has a maximum ambient temperature rating of 100. This allows the wire to melt, but the insulation to remain intact for safety. Make sure the bump on the fusible link faces toward the motor. Fire damper installation guides combo firesmoke dampers. Extreme caution should be taken when replacing a fusible link making sure an exact replacement of gauge and length as installed by original manufacture is. The size of the link and the load rating in pounds for the link. Nfpa 80 2010 standard for fire doors and other opening. At this point if the fusible link looks ok but a problem is suspected, is it possible.
Maintenance refer to model number and serial number on assembly when ordering replacement parts. The circuit between the alternator and battery is a good example of a circuit where a fusible link would be used. Fusible link assembly replacement fits legacy lrze, lrzm, jandy lite2 ld, lg, lj pool and spa heater models 125, 175, 250, 325, 400 also fits zodiac jandy lxi low nox, lxlt, lxlt low nox pool and spa heater models 250, 300, 400 compatible with zodiac hot shot pool and spa heater model 100. As mentioned, a fusible link can sustain short high current surges without blowing unlike a fuse.
We recognize that nfpa 80 does not address the replacement frequency of the fusible links. The fusible link wire gauge is smaller than the circuit which it protects. A 14gauge wire would be protected by an 18gauge fusible link. Fusible link primary ground wire 12 gauge 10ft protects wiring circuit nos usa. Application the fusible links are installed over cooking appliances and in the. Replacement fuse links for all 1600a ratings 250v lkn and 600v lks will continue to be available to service the installed base of ren and res fuses. To properly connect a fusible link you need to use a crimp, solder, and. The links shall be replaced sooner during annual inspection if the conditions in 4 exist. If the damper is equipped with a fusible link, the link shall be removed for testing to ensure full closure and lockinplace if so equipped. Inspection, maintenance, testing and replacement frequency of fusible links used in fire doors. Manually push the top of each latch outward, towards the outside of the vent, about 114 to 112, and clamp latches to center brace using vise grips, locking pliers, or small c. There are also different lengths of the fusible links.
Style 15 links are for use on fire doors, windows, and lids. In an extreme current overload situation, the conductor within the link is. Some fusible links have a tag at one end that indicates its rating. Odd number wire gauge sizes like 19, 15, and 11 are counted when sizing a link. A fusible link is a short piece of insulated lowvoltage cable within an automotive wiring harness that is designed to protect the harness in applications where a fuse is unsuitable. Style 8 links are commonly used on fire doors, smoke and heat vents, and ducts. I was looking at the service manual searching for info about how to service the fusable links in 2nd gen cars, it tells me everything but the lengths of the fusible links. Zep dyna clean installation and operators manual i. The fusible link must be reinstalled after testing is complete. Fusible links critical in restaurants fuller fire and. Bring the part to any advance auto parts store along with your receipt or packing slip mail the part back to advance auto parts following the directions including on your packing slip core charges are often mandated by state legislature, and, as such, the actual core charge and taxes on the charge may vary depending on the state in which you buy your part. Fast fuses when to specify a cablepro fuse and how. Nfpa 96 also requires a maintenance certificate to the sent to local authorities. Fusible link wire is covered with a special thick, nonflammable insulation.
If the damper is equipped with a fusible link, the link must be removed for testing to ensure full closure and lock inplace if so equipped. Fusible links also spelled fuseable and fusableserve a similar purpose to a fuse. Just like a fuse, the link is designed to handle a lower current amp load than the rest of the system so, in the event of a short or overload, the link will be the first failure point. Inspection, maintenance, testing and replacement frequency of fusible links used in. Dorman conducttite 14 gauge fusible link wire carded. For your information globe technologies corporation. A 6gauge wire would be protected by a 10gauge link, and so on. If a fusible link does open, special attention must be.
The automotive service industry recommends using the same gauge and length as the blown fusible link after the cause of failure is corrected ensure the sizelength you put back in is the sizelength you took out. The main difference is that the fusible link and fuse element are used to protect higher. Place parts to be cleaned in the center of the parts washer. A fusible link is just like any other car fuse, but instead of being plastic, it is a thin wire with a thick insulator. Remove detachable handle and return to stowed position on mounting bracket. A fusible link fire sprinkler head has a twopart metal element that is fused by a heatsensitive alloy. If the link is damaged or painted, it shall be replaced with a link of the same temperature and load rating characteristics. The manufacturer of the fusible link recommends replacement once every year. If fail open, apply power andor air pressure to damper. How to replace a fusible link car wont start youtube.
The unit now is properly armed and may be operated closedopen in the normal manner using valve handle. The construction and function of fusible links and fuse elements are similar to that of a fuse. Always use proper laboratory equipment to supply the required power, do not use your accumulator or spare battery cells to test your fusible links in situ. Consider also what happens when something goes really wrong vehicle accident where part of the harness is pinched and shorted to the bodychassis. Never install a fire damper without the proper ul approved fusible link in place. Again, the fusible link is there to protect the wiring harness leading to the fuse panels. If you are looking for a local hvac representative to perform the installation for you, find them on our local hvac rep page. Fusible links that have been painted must be replaced as soon as the condition is observed. Dont try to save a few pennies by simply swapping in a thin gauge wire, as standard wire lacks the protective insulation of a link and could lead to a shortout condition if. Service tags should have the identity of the service technician.
Once you locate it, you can replace the length of wire with a fusible link that matches the gauge of wire called for by the original design. When the fusible link opens, it releases the damper components to close, and they will stay closed until a new fusible link is installed. Replacement brown fusible link six inches for main feed wire or other 10 gauge wire. Field fusible link replacement moffitt corporation. Once the room temperature around the sprinkler head reaches a certain temperature, the alloy melts, and the metal elements separate, which causes the. Some links are liquid filled glass bulbs, and some are pieces of metal soldered together. In the event of an overload the fusible link will melt, breaking the circuit and preventing damage to the electrical system. They are placed inline between delicate harnesses and large sources of electrical. These links are actually strands of wire wrapped in a fireproof covering, and are thinner than the wiring harnesses theyre connected to. When the link pins are close enough, the new fusible link can be installed on the pins. Globe model j fusible links are heat activated and made with brass components to resist corrosion.
A fusible link is a special type of wire that protects a circuit that has constant high current requirements and must resist high surges in the circuit. Model sl and model apc model sl fusible links fusible. A temperature sensitive device that holds the damper components in the open. Under no circumstances should a fuse link replacement repair be made using a length of standard wire cut from bulk stock or from another wiring harness. To ensure safety, replace links annually and do not paint or coat them. Warranty pdf the parts washer arm assembly has fusible safetylink and is designed to melt and allow the cover to fall shut and smother any flames in the event of fire. Chance type k and type t fuse links are made in complete accordance with ansinema standards.
Fuse holders fusible links fusible link wire pico wiring. If the link is damaged or painted, it must be replaced with a link of the same size, temperature and load rating. According to this fusible link faq what size replacement fusible link should be used. I dont plan on replacing them but when time and money becomes plentiful, i wouldnt hesitate to get rid of the weak link in the chain. Nfpa 802016 edition standard for fire doors and other. Style 6 and 7 links are often used on fire doors, windows, hatches, dampers, and blowers. The maximum ambient temperature rating for the link that is greater than the maximum ambient exposure temperature at the fire door. Document number 471602 fusible link replacement on fd, dfd, odfd, ofd, ssfd, ssdfd, sedfd and kfd series curtain fire dampers fsd, sefsd, ssfsd, cfsd, and ofsd series combination fire smoke dampers installation instructions 1 3 4 2 side crosssection view of curtain fire damper in wall replacing fusible link on a curtain fire damper. A fusible link is usually four 4 wire sizes smaller than the circuit that it is protecting. Prop 65 warning this product can expose you to chemicals including lead and di2ethylhexylphthalate, which are known to the state of california to cause cancer, birth defects or other reproductive harm. The other fusible link at the starter is the main power feed to the firewall jblock for the everything else.
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