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“ key operate latch ”

Resolution: - 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 ...:

Can the NL key override be used on Chexit Rim or Vertical Rod devices?

Resolution: The NL key override will not open the door while Chexit rim or vertical rod device is in the arm mode.:

How do I change the function of the Von Duprin 7500 mortise lock from Lever ( classroom ) to NL ( night latch )?

Resolution: To convert the Von Duprin 9975L to 9975NL exit function follow these steps (Note: the mortise lock is shipped as Night Latch from the factory): Turn the NL screw on 7500 mortise lock counter clo...:

Why does my 7500 retract the latch bolt but not re-lock the trim?

Resolution: Tips for changing the function: The NL Drive screw will not be visible when lock body is set to Classroom function There is locktite on the screw that makes it seem like its turned down enou...:

Why would the 996L trim not lock or unlock when installed with 98 or 99EO?

Resolution: The 98/99 rim and vertical rod exit devices are shipped with NL drive screw to function as a Night Latch. To convert the device to Class Room, remove the NL Drive Screw on 98/99 center case ass...:

Can the Von Duprin WS98/9927 exit device be operated as Night Latch function?

Resolution: We do not offer a true night latch, storeroom or ANSI "03" function with this device. (Entrance by trim when latchbolt is retracted by key. Key removable only when locked.) This function would da...:

What wire gauge and run is recommended for Von Duprin electric latch retraction EL device?

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“ key operate latch ”

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