what is qel

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Answer
Yes the Von Duprin QEL exit device retracts the latch bolt and pushpad. Pushpad and latch bolt stay retracted as long as power is applied to the QEL exit device.
You may have a defective motor bracket, defective base plate or vertical rod could be out of adjustment.
Following could cause the QEL device to retract and release repeatedly: If this is a vertical rod type device, the vertical rods could be adjusted too short. Check rods for dead locking, if n...
Use the PS902-2RS power supply with LCN auto operator on single door, PS904-2RS power supply on double door and PS904/906-2RS-2RS for 2 pair of QELA is required for basic operation with a...