bottom latch dragging

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Following could cause the bottom latch on 98/9927 exit device to drag. Bottom rod is too long. Adjust bottom rod per instruction sheet 911375. Top latch controls the bottom latch.  ...
Required top and bottom rod adjustment. Top rod possibly is adjusted too short and not lifting the rod far enough to engage the latch retention which would cause bottom rod to drag floor ...
One of the following items may cause the EL1490 device to retract then release: Incorrect power supply - Verify you have the PS873-2/4TD or PS914-2RS/4RL power supply. Problems with wire gauge...