what is LCN stand for

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The LCN Bollard post (8310-866) only accepts the "square" actuators (no round actuators). The size of the Bollard post is 4” X 6” X 36”. Acceptable actuator part numbers are: Hard Wired -  831...
The "common" of all the actuator switches will connect to terminal 10. The N.O. (normally open contact) will connect to Terminal 5, 6, 7 or 8 depending on which control box is used and the function...
Von Duprin offers two options:The CDSI/HDSI Dogging Indicator provides an at-a-glance verification of the status of the door from inside of the room. Visible “LOCKED” and “UNLOCKED” indicators show...
The (SF) "Swing Free" arm allows the door to be put into hold open position, but then repositioned (swing free) to any other degree of opening without taking the closer out of the hold open mode. ...
Regular LCN closers have "3" regulating valves for General Speed, Latch Speed, and Backcheck. If the LCN closer has "4" regulating valves, then the closer has the Delayed Action feature. De...
When dealing with glass lights in doors, there are three (3) critical dimensions which must be coordinated: Exposed Glass Size (EGS) - the horizontal and/or vertical dimensional size of the vision...
AVB stands for Advanced Variable Backcheck. It is a cylinder option when ordering a 4111 closer (without an ST) that allows backcheck to start at about 45 degrees instead of the normal 75 degrees. ...
LCN does not supply Allen wrenches, the size that LCN uses, are standard sizes that every installer will have in their tool kit. 3/32" Allen wrench for adjusting regulation valves: main speed, lat...