The max pressure that is recommended for the pneumatics is 250 psi, although most bike pumps don’t have gauges that go over 160 psi. Also, as the above person mentioned, in competition the pneumatics should not exceed 100 psi. As for things not to do: don’t try to pull out the tubing without pushing in the ring things. Other than that its pretty hard to screw anything up if you follow the directions.
Everyone looks at the tank and sees “200psi! It must be safe to fill it up that much.”
However, the pistons are actually the limiting factor for the system. This is the spec sheet for the NCJ2D10-200 cylinder from the manufacturer’s website: http://content.smcetech.com/pdf/ncj2.pdf
It says the “maximum operating pressure” for the cylinder is 100psi.