LiftMaster LM21AFCB Advanced Fire Control Release Device

The LiftMaster Fire Control LM21AFCB Release Device is a UL/ULC-listed normally energized, fail-safe device incorporating state-of-the-art electronic control circuitry.

This release device is designed for manual doors or motorized doors incorporating a reversing electric safety edge to create an automated door closing system, and in conjunction with a temperature fuse link system.

The high-performance control panel responds to emergency conditions generated from an automatic initiating device. Upon activation, the device will then automatically close a motorized door or mechanically release a door in the absence of motorized operation.

Features

• UL 864 Revision 9 compliant.
• 3 count obstruction cycling.
• Selectable 10, 20, 30, or 60-second delay on alarm.
• Test key switch – Floor level testing.
• Motor voltage sensing.
• Form C relay output.
• Lower limit detection.
• Safety timer.
• Battery support for release device logic, smoke detectors, and standard annunciator.
• Trouble diagnostic capabilities (does not support operator).
• 2-wire or 4-wire smoke detector wiring.
• 120Vac operating voltage.

Also known as

• LiftMaster CN21-AFCB
• LiftMaster OH21-AFC

Product Literature

• LiftMaster Advanced Fire Control Release Device LM21AFCB Owner's Manual