Bruce,

I could not figure it out, the manual talks about this on table page 4, where it explains what a two tap will do.

"Housecode & Unit Code (once)
Housecode & ON (two times)"

Unless they have writen software to interpret what to do with multiple house codes or the manual is incorrect this won't work. They certainly do a poor job of covering what to do with this feature. I have sent in an inquirey to the manufacturer, I will let you know what I hear back.

Bill
www.homeautomationnet.com