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RELATED FAQS

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Why does my AD or CO series lock unlock when the lever is raised?
Installers have reported that their AD-CO Series cylindrical or mortise locks will unlock whenever the outside lever is lifted.    This will occur if the outside spindle (square post) is install...
Why doesn't full rotation of the AD or CO Series Exit Trim (993) outside lever fully retract the Von Duprin 98/99 Exit Device latch?
- AD Series and CO series products require that the Night Latch (NL) screw is installed in the exit device.  Be sure this screw is installed- Exit hardware and strike must be properly mounted ...