To fill the tank there should be a little button near the top of the tank. Push that and the top will swing on a hinge one direction or the other (I believe it goes counterclockwise but I'm not sure) and that will expose your fillports.
To change the coil you take the tank apart and unscrew the coil from the bottom piece of the tank. Screw a new one in, put the tank back together, fill it with
juice and wait a couple minutes to let it wick before firing it.
Hope that helps!
