I think that the bypass will depend on the model of the A/C. When I researched this a few years ago, I found it simpler just to trick the internal A/C temp controller by heating it, rather than bypassing the controls electronically. So, basically, I can't help. Sorry!
Mine works functionally as you desire, it's just not as elegant. But it's also easily reversible, which was nice when I went to larger A/C.