Latch pulls in and releases right away

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Question
Answer
1400 degrees which is approximately 20 minutes after the fire starts.
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...
NL-OP, Night Latch Cylinder Assembly - Optional Pull, Optional Pull
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...
  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...
 
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...