Greg,

There are several types of split systems. This air handler is 220 volt 15 amp. separate feed and has no heating coil and has no disconnect switch built in to it. It acts just like a typical AH that would be in an attic, but it is mounted on the wall. This one happens to be in my house:


http://www.residential.carrier.com/interactive/ductfree.html

Or something similar to it. Except there is no heating coils. Would a lockable breaker count for the disconnect?