i doubt you will need to adjustment at all. but here's my explanation:
It is often quite unlikely for the neck to be warped. If you suspect it is, put a cappo on the first fret. Then fret the string off at the last fret with your right hand. Take a look at the height of the low E string over the 8th fret itself. If the string is touching the fret, the neck is bowed towards the strings or completely flat. Since the string needs room to oscillate in, you will need to turn the truss rod anti-clockwise for relief, in that case. There should be a distance of about 1mm, from the bottom of the string to the top of the 8th fret. If you feel the neck is bowed away from the strings too much, then you'll need to turn the truss rod screws clockwise, to pull the middle of the neck back towards the strings. The neckplate screws have to be loosened, and neck tilted out of the pocket, to be able to get to the trussrod screw with a screwdriver. If you want to turn the truss rod screw in either direction, screw should be turned no more than 1/8-1/4 of the way around. Then put the neck back on and retune. Let the neck settle for a while before playing (the wood can take a day to work its way slowly). Further adjustments can be made if neccessary. take your time and don't rush with this.