Thomas,
If you have a LCN 4111 DEL Door Closer, it probably does not have hold open. What it does have is a Delay function in the hydraulic cylinder. The delay function holds the door open for up to up to 30 seconds until it closes. This function is recommended for areas were they are children, elderly or the handicapped. You can adjust the amount time by adjusting the delay valve on the cylinder. As far as the 4110-62, I am not 100% sure that number tells us anything.
Greg