Will a "pull side" key cylinder retract the latchbolt on the Von Duprin Chexit 98/99 Rim device when "armed"?

No, when "armed" the Chexit 98/99 Rim device "locks" the latchbolt and therefore "locks" the key cylinder function.  The device must be "dis-armed" for the key cylinder to retract the latchbolt to gain entry. 

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