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LiftMaster® release devices control the closure of a rolling
fire door, counter fire door, fire shutter or track door in an
emergency situation. Release devices work in conjunction with
the door or shutter to provide an effective fire and smoke
control system by preventing spread beyond the area of origin.
The device's basic function is to provide a time-delayed release
of fire door or shutter upon receiving a signal from a smoke
detector or central alarm station (or other remote switching
device) or upon loss of power. Release devices are also an
integral part of the fusible link assembly, releasing the door
or shutter when the fusible link separates.
Models are available for use with both non-motorized and
motorized door applications. For motorized door applications,
select models can be used to create a fully automated door
closing system when used in conjunction with a standard
commercial operator by providing features typically found on
expensive, special-order fire door operators |
