Door Operators - LiftMaster FDO-A/FDO-B

The retrofit fire door operator is an automated motorized fire protection system. When a fire alarm is activated, the fire door will automatically close at a rate that meets NFPA 80 regulations. This door operator is compliant with all UL fire rating standards and works with a wide variety of fire doors.

Save time and streamline drop testing by replacing old tension loss door systems with this new technology. Drop test and auto-reset fire doors by simply turning a key.

Dual voltage connections

24-Volt Control Circuit

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