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Explain how the cylinders function on a 98/99 double cylinder (-2/-2SI) device.

  • The Push Side Cylinder (in the centercase of the exit device) is the only way to lock/unlock the Lever located on the Pull Side of the Door.
  • The Pull Side Cylinder (in the trim) only retracts the latch (like an NL function).  This allows entry with a key while the lever is locked by the Push Side Cylinder.

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