Firstly charge the battery in the trigger frame. Then if using for tournaments lock off fully automatic, to change to semi-automatic.
The familiarise your self with the marker. Go through the manual.
Oil the insides. Simply put about 3 drops of lubricant into your bottom line and screw on your air system.
Cock the gun and fire the gun dry about 20 times to get the oil around the insides.
Attach a hopper and fill it with paint. Now head over to the crono and test the gun out onto the crono. Follow the manual instructions and adjust the input pressure into the marker, i think its around 500-600psi for spyders (not sure). Then at the back of the spyder should be a little knob, this adjusts the tension of the spring behind it. Turn inwards (clockwise) to increase the velocity, and turn outwards (anti-clockwise) to decrease the velocity.
The velocity should be below 300 fps at all times.
Hope that helps
Darwood