Before you connect the AP to your network, directly connect with a PC and give it a command to use a bogus ZD IP address, then it will never connect to your existing ZD network.
rkscli: set director ip 1.1.1.1
rkscli: reboot
If you don't give it a static IP outside your DHCP scope (recommended) you will have to look up it's IP from MAC address in your lease table.