5 Main Features
No power or control systems required - full passive protection
Fireshutters with fusible links can respond quickly to rising temperatures
They can be used in buildings that handle hazardous materials or have valuable equipment
They can also be used to provide an added layer of security when the building is not in use
They can be linked to a building's security system or fire alarm system
How the Fireshutters Fusible Link Works
The door closing descent mechanism is as standard actuated by a Fusible Link, which melts at 67 degrees activating the stainless steel fire roller shutter is used to operate the door closing descent mechanism. The fusible link is exposed to general airflow and installed on the roller drum side, no more than 250 mm from the roller drum. It is attached to an automatic release arm that is spring-loaded. The release arm is triggered when the fusible link breaks, releasing the tension in the door springs and, if applicable, disengaging the motor, allowing the door to fall freely under controlled descent. Where the opening is greater than 4m wide, the shutter will have at least two fusible links (connected via a cable) located at each end of the opening. Optional Fusible Link with can be used on motorised and manual chain operated fire shutters that are connected to the building’s Fire Indicator Panel (FIP).
Integration With Fire Control Systems
It is strictly the client's responsibility to interface a smoke detector or fire alarm from the FIP to the fire shutter if necessary. When the FIP receives a fire signal in the vicinity of the door or in another area (based on the FIP setup), the holding magnet triggers the door closing descent mechanism. The FIP then cuts off the holding magnet's continuous 24 volt DC power, which releases the clutch and the tension in the door springs, allowing the door to fall freely under controlled descent. In the event that the magnet release fails, the fusible link serves as a backup and will initiate descent as previously mentioned.
Optional Fusible Link with ETL can be used on motorised and manual chain operated fire shutters that are connected to the building’s FIP. Where required, a smoke detector or fire alarm can be interfaced from the FIP to the Fire Shutter (strictly responsibility of the client). The door closing descent mechanism is actuated when the FIP upon receiving a fire signal sends an electrical pulse to the ETL (situated at the door) which melts the link releasing the clutch and the door spring tension enabling the door to free-fall under controlled descent. Should the FIP fail to send an electrical pulse to the ETL, the ETL is also activated by temperature. The fusible link acts as a back-up in case of ETL failure and will actuate descent as described above. NOTE: All wiring from FIP to the ETL is the responsibility of the client (builder).
Operation
Where required, a smoke detector or fire alarm can be interfaced from the FIP to the Fire Shutter (strictly responsibility of the client). The door closing descent mechanism is actuated by the Holding Magnet when the FIP receives a signal of fire in either the door vicinity or other area (depending on FIP setup), the FIP then terminates the continuous 24vDC power to the holding magnet, releasing the clutch and the door spring tension enabling the door to free-fall under controlled descent. The fusible link acts as a back-up in case of magnet release failure and will actuate descent as described above. NOTE: All wiring and 24vDC power supply from FIP to the holding magnet is the responsibility of the client (builder).
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