LiftMaster® commercial door operators will be fully compliant and bear the UL325 mark, satisfying
AHJ requirements and insuring approval during a project's final inspection.
Effective August 29, 2010, Underwriters Laboratories will require all commercial door operators
manufactured on or after this date to be fully compliant to UL325 2010, the standard to which
commercial door operators must comply in order to achieve UL approval and bear the UL325
mark.
WHAT DOES THIS MEAN?
· All commercial door operators bearing the UL label must continuously monitor safety devices such
as photo-sensors and sensing edges – this is a MANDATORY requirement for operation other than
constant-pressure-to-close!
· A manufacturer's inability to comply will result in the operator being limited to basic C2, constantpressure-
to-close, operation. No other wiring types or special features, such as timer-to-close, will be
permissible without compliance.
· Monitored photo-sensor or sensing edge safety devices are mandatory, and both must be designed to
provide continuous status updates to the operator, which, in turn, must be designed to receive and
monitor these updates. Auxiliary non-monitored safety devices, such as a pneumatic sensing edge,
are permissible, but only in conjunction with the monitored safety devices.
· Monitored photo-sensors and sensing edges must be tested in conjunction with the operator by UL as
being compliant with the operator as a safety system.