qel hd installation instructions

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We offer a couple different HD-QEL options:Hex key dogging (HD) is now available with Von Duprin non fire rated QEL33A/35A/98/99 electric exit devices that were shipped after De...
To keep the Von Duprin electric latch retraction EL or QELA exit device dogged (retracted) all day, have your access control, Key pad, key switch, fire alarm contact or any other signals ...