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NL not latching
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Question
Answer
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...:
How can the Von Duprin 98/9975-L with 996L classroom trim function be converted as a night latch function in field?
Resolution:
The following steps are required to convert the Von Duprin 98/9975L from classroom to night latch function: Order new 996L-NL-M trim and reset NL drive screw in mortise lockbody as se...:
How do I convert a 360L from NL to TL?
Resolution:
To convert the Von Duprin 360L/TL from Night Latch (NL) to Classroom (TL) or from Classroom (TL) to Night Latch (NL), invert mortise cylinder cam. :
How do you convert the Von Duprin 370 series controls to NL or night latch function?
Resolution:
You must have the Von Duprin NL Cylinder plate part number 967484-89 to convert the 370 series controls from classroom function to night latch function. If new installation, use the NL cylinde...:
What is the difference between Night Latch (NL) and Class Room function?
Resolution:
Night Latch (NL)= key retracts the latch momentarily to allow entry. When key is removed, the latch will extend and locks the door (momentary unlock). Class Room (Lock/ Unlock)= key unlocks...:
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...:
Does Von Duprin offer an NL or NL-OP function with the 8827 exit device?
Resolution:
This option is not available as there is no NL cam to directly drive the rods and using a key to lift the heavy stainless, brass or bronze rods would damage the key. :
Do I have to use the 388 to get NL-OP on a 33A/35A series device?
Resolution:
The 388 Cylinder Control is required for the NL-OP function on a 33A/35A series exit devices.The 110NL is used on 22 and 98/99 series exit devices not 33/35A series devices.The 33A/35A de...:
Will Von Duprin supply the 996L, 996L-BE, 996L-NL and 996L-DT trims with an RX switch?
Resolution:
Von duprin will supply the 996L and 996L-BE trims with RX switch. Von Duprin will not supply the 996L-NL and 996L-DT trims with RX switch because the switch monitors the lever movement and the leve...: