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“ Latch not undogging not locking ”

Resolution: There is no conversion kit to add EL or ED to an existing 1690 or 1790 series device. All of the components are built into the device, since the device does not have a separate base...:

What is needed to keep the EL device retracted all day?

Resolution: To keep the Von Duprin electric latch retraction EL or QELA exit device dogged (retracted) all day, have your access control, Key pad, key switch, fire alarm contact or any other signals ...:

How do I add mechanical dogging to my Von Duprin EL device?

Resolution: HD-EL (Hex Dogging Electric Latch Retraction) solenoid and plunger can be replaced with standard EL solenoid and plunger on non fire rated exit devices, but this should not be used on a daily basi...:

HEX DOGGING/ELECTRIC LATCH RETRACTION

Resolution: HD-EL:

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...:

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 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...:

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“ Latch not undogging not locking ”

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