The garage shutter door should be stopped at the intermediate stop position. The fire shutter is generally received after receiving the fire alarm signal. Wait for a while before dropping to the bottom. Another setting method is that if it just receives the smoke signal, it will drop to the intermediate stop position and stop. After the isothermal signal or the fire center signal comes, the door will continue to fall to the bottom position; if it is a temperature signal or fire After the central signal arrives, the door drops to the neutral position, and stops, delays, and then drops to the bottom position.
The fire shutter control box should also bring reserve power. Case 1 without main power supply, according to industry norms. The backup power supply can still open the shutter brake according to the fire signal and let it fall. Many places have not implemented this standard.
There is an easy alloy sheet in the release, and the fire shutter can also be equipped with a fuse release. When the temperature reaches the temperature of 73 degrees stipulated by the national standard, the fusible alloy sheet will melt, and the brake of the door rolling machine will be opened to let it fall automatically. This is also an auxiliary function.
Following the signal from the fire center, the fire door should be able to link with the fire center. Unified decline.
It must be dropped to the bottom once. Fire doors are generally received after receiving a fire alarm signal. The main function is to serve as a fire partition.
The fire shutter control box may transmit the position signals of the door in the upper, middle and lower to the fire center. In the fire alarm state, no matter which of the above methods. When the door is below the middle position, press any button of the button box, the door will rise to the stop position, delay, and then fall to the bottom position. And this function can be used repeatedly. That is to say, after using it once, it may also be used for the second time, the third time… This is an escape priority function.