How to Convert Von Duprin 98/99 Rim to QEL

This video demonstrates how to convert a Von Duprin 98 or 99 Series Rim exit device to a QEL with the QEL modular kit.

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What would cause the electric latch to chatter when testing

[@prettybigtuna]

AC? instead of DC? any update on what it was?

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Vertical rods needed adjustment