You get what you reinforce. If they bite, figure out why and then respond to the cause of the bite (play, fearfulness, wanting you to leave, fear of some object, etc etc) instead of focusing on only the symptom (the bite itself). Like stated, bites are self perpetuating even when not meant to be harmful. They hurt regadless and forbid, they quickly can be especially harmful when hormones or fearful situations arise.
The advice above is great if he is biting because he is playing and wants to get a fun reaction from you. Doing your best to not respond in an excited way is ideal and even better than silence is something like "No, or you hurt me etc" They are definitely smart enough to know if you are reacting to communicate "No, you hurt me etc" versus reacting in a funny exciting way even if it's unintentional on your part "AAEEEHHH, OW, Naughty turd brat bird! etc". You will learn to quickly tell if the bite was an accidental slip up, natural beaking instincts, or being rough. From there, you can then decide to continue playing, offer something appropriate to chew on, or end the play session. The reaction/punishment etc should fit the behavior/crime etc versus a one size fit all approach to the a bite. Addressing the cause...not the symptom. They're smart cookies and know what is fair and learn the boundaries if you are consitent and timely with your reactions.
Personally, what worked very well for my 2 when I got beaked by accident, I pretended I was essentially another bird that got a sore pin feather bumped...I would make a sharp sudden "Ah" or "Hey" and even beak back and make an annoyed hurt facial expression. They would do the exact same thing to you or another bird. They are smart enough to understand that it isn't personal or that you're being mean or abusing them. You are simply communicating that what they did hurt you regardless of their intentions. This is also how I got my birds to not pull off my buttons or any jewerly from myself or other people. I pretend those are pin feathers and immediately let them know that touching those things HURT!
Good luck and congrats on your boy settling in!