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
