When you upgraded for 522 SD receiver to 622 HD receiver, you need a tech to do the install. The satellite dish needed to be upgraded to get the HD satellite orbital. For the replacement of the 622 or even if you choose to upgrade to a 722 receiver, DISH Network will ship the receiver to you. It does come with a detail instructional sheet. I tell clients to put the new receiver on top of the old one and disconnect one cable at a time and plug it into the replacement unit. You will need to access some menu screens to complete the installation but it is a very simple process. If you are requesting a technician installation of the replacement, please PM me and I will see what this will involve for you. Thank you!