The Von Duprin EL33A/35A/98/99 device can be converted to the QEL device by getting the correct sized QEL baseplate conversion kit. The existing PS914 or PS873 power supply can be used.
...
Kits are available per the following criteria. Product Bulletin
Required
Series 94 or 95
Fire or Panic
3FT/4FT or 2 ft 6 in / 2 ft 10 in
Finish
Optional
LX...
The part will be configured as CONVERT.XXXX part numbers. The customer need to specify the following criteria.
Required: Series 94 or 95, Fire or Panic , 3 feet/4feet or 2 feet 6 inches/2 feet...
Followings are the list of the electric latch retraction EL/HDEL (hex dogging), QEL (quiet) kits:
114317-00
QELA Mod. Conv. Kit
040061-00
QELA Mod. Conv. Kit...
The 900-2Q board is no longer available.
For warranty purposes, QEL conversion kit and 900-2RS board are required. The 900-2RS replaces the 900-2Q board.