Where are the fusible links located?
They are placed in-line between delicate harnesses and large sources of electrical current in your car—between the battery and alternator, for example. These links must transmit high-current electricity, but also protect the rest of the electrical system from dangerous spikes that could cause a fire.
What is the characteristics of fusible link detector?
Fusible links are temperature sensitive fire protection devices designed to be part of a fire protection system. The system is activated when the ambient temperature increases to the point that causes the fusible link to “break-apart”.
What is fusible link technology?
A mechanical fusible link is a device consisting of two strips of metal soldered together with a fusible alloy that is designed to melt at a specific temperature, thus allowing the two pieces to separate. Electrical fusible links are common in high-current automotive applications.
Where do you use a fire damper?
Location: Fire dampers are installed in or near the wall or floor, at the point of duct penetration, to retain the integrity and fire rating of a wall or floor whether it is a ducted or open-ple- num return application.
How do you reset a fire damper?
To reset a damper, each stainless-steel blade is repositioned by pushing back the latch under spring tension. Once all the blades have been pushed back, the latch springs out to secure them.
How do you reset a duct fire damper?
Depress the disc on DRS-30 or HS-10 (located inside the duct. This will disconnect power to the actuator and cause the damper to close. Push the reset button (located outside the duct) to reengage power and reopen the damper.
How are smoke dampers activated?
Smoke dampers can be activated by the fire alarm system, usually initiated by smoke detectors, or interlocked with a fire suppression system.
How are smoke dampers controlled?
Smoke dampers are operated by either a factory-installed elec- tric or a pneumatic actuator. They are controlled by smoke detectors and/or fire alarms. As part of an “engineered smoke control system” designed to control smoke migration using walls and floors as barri- ers to create pressure differences.