Over time the system will burp itself of air. Should have said burb process, not bleed. As the air is removed you will probably have to add a little bit more coolant.
Although you should have the closed system with the pressurized plastic bottle, that's a bit more difficult to burp, you might have to help it burp by filling the system with the gauge sensor removed from the back of the head. Then screw/tighten the sensor back in when you are done filling the system.
You will still have to add more coolant within a week or so as the last of the air pockets are removed by the system.