rim cylinder mullion

RELATED FAQS

Question
Answer
Minimum door opening for a 98/99 rim device with a 4954 mullion and 299 strike is  26.687" (26 11/16")
The 1609 strike can be used on an inactive door with 22 rim device.  NON-FIRE RATED doors only. 
The KR4023 mullion requires a 1-1/4" mortise cylinder with straight cam. This is stated in box 7 on the first page of the KR4023 mullion instructions.
Von Duprin KR (key removable) mullions requires a 1-1/8" or 1-1/4" mortise cylinder with the standard straight cam, the cam is not inverted. Please see chart below for part numbers. 
instructions
 The tailpiece of the rim cylinder can be inserted into the Von Duprin 98/99 rim device either vertical or horizontal.
Order the device as 88 NL less trim. The cylinder will be mounted to the face of the door. Use templates 10156 and 40015.
The backset for a 98/99 rim PANIC device with 1609 strike is 2 3/8" from center of the opening to center line of the device. See template