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“ latch not extending after elr retraction ”

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How do I wire an EL device to normally hold open the latch and release it during a fire alarm?
Use a normally closed fire alarm as the input to the power supply option board (PS873-2 or PS914-2RS), this will hold the latch retracted.  During a fire alarm, the contact will open, dropping...
Has the Monarch 19 ever had electric latch retraction?
Electric Latch Retraction(ELR) option for the 19 Series was discontinued in December of 2006.
EL Device Troubleshooting Guide
(For best viewing, use Chrome or Firefox browser.)ALLEGION EL SOLENOID ELECTRIC LATCH RETRACTION TROUBLESHOOTING GUIDE IF DEVICE LATCH IS NOT RETRACTING PROPERLY WHEN POWERED, FOLLOW THESE STEPS I...
What would cause the Von Duprin 88 series exit device latchbolt not to extend and the crossbar to droop?
The spring in the hinge case or end case assembly lifts the crossbar and both lever arms.  If broken, the crossbar and lever arms will drop down. The weight of the crossbar and levers will automati...
Can the Von Duprin EL option be added to any existing 98/99 device?
The Von Duprin EL option can be added to any existing 33A/35A, 98/99 series exit devices. 
Why is my latch not retracting when I depress the push pad on an XP98/99 device?
  Pushing on the push  bar or activating the EL/QEL or the trim on Von Duprin XP98/99 exit device does not retract the latch, it releases the latch only. Door must be pushed or pulled when device o...
What wire gauge and run is recommended for Von Duprin electric latch retraction EL device?
  For Product Shipped Prior to August 2012 using the old (black) potted module: a.       0-100 ft 14 gauge wire b.      0-200 ft 12...
 
Why doesn't full rotation of the AD or CO Series Exit Trim (993) outside lever fully retract the Von Duprin 98/99 Exit Device latch?
- AD Series and CO series products require that the Night Latch (NL) screw is installed in the exit device.  Be sure this screw is installed- Exit hardware and strike must be properly mounted ...
Why would the 996L trim not lock or unlock when installed with 98 or 99EO?
The 98/99 rim and vertical rod exit devices are shipped with NL drive screw to function as a Night Latch. To convert the device to Class Room, remove the NL Drive Screw on 98/99 center case ass...
Why does my Trilogy Lock not retract the latch when I replace a lever trim on a 98/99 series device?
If the NL screw on the 99 device has been removed the Trilogy lock will not retract the latch.