Recommend to order a new 990NL-R/V or M trim to change from TP/Classroom function to NL/Storeroom function. You will also need to reinstall the NL drive screw back into into the mast...
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...
To convert the Von Duprin 98/99 Rim or Vertical (Rod or Cable) Exit Device with functional lever (996L-R/V) to act like a rigid lever (996L-NL-R/V) with key over ride follow these steps:
R...
To convert the Von Duprin 9975NL(Night Latch or Storeroom) to 9975L (Classroom) exit function follow these steps (Note: the mortise lock is shipped as Night Latch from the factory):
Turn the NL ...
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...
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...
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...
The 179CA cylinder assembly contains the parts that need to be put in the exit device to convert it from EO to NL (nightlatch) or HB (hold back) function.