FAQs

Question
Answer
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. 
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 NL-OP function for 25-C uses the 718C trim, so template T-2211 for metal doors and W-2211 for wood doors for 718 trims prior to 2/28/2011. T-2211 for trims prior to 2/28/2011 W-2211 for...
Device would be ordered as a 25C-C as of June 2012.
No, the 98/99 series mortise exit device should be ordered as NL less trim. IE, 9875NL-L/TRIM. NL-OP suffix is normally used with the 98/99 series rim, surface and concealed vertical rod devices wh...
Von Duprin 98/99 NL drive screw is located in back of the 98/99 center case assembly. NL drive screw should be left in with trim lock slide plate in up position in the 98/99 exit device with E99...
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...
There is not a wood template for 9957 three point latches, use the 98/99 rim template W10301 to get the correct device backset.  For NL trim (990NL) use trim template and installation instruction W...
To convert a 98TP to a 98L-NL you must purchase the 996L-NL trim and an NL drive screw (090074) to install in the master cam.
Typically a magnetic contact switch used to monitor whether a door is open or closed