EL releases after hours

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If your Von Duprin EL (solenoid) device pulls and releases quickly instead of holding the latch retracted, please check all of the items below.In most cases, one or more of these solutions will r...
If mechanism cover plate causes the EL solenoid to drop when slid over the solenoid, the solenoid plunger requires adjustment.  You must lengthen the rod by turning the hex nut in front of the plun...
Following could cause the EL device to pull and drop repeatedly.  Short to ground  on EL wiring.  Incorrect wire gauge used.  For wire run and gauge requirements, click HERE  Wrong power suppl...
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...