OK, the problem is my humidity is not controllable even with my 2 stage Infinity 50/100. At times the humidity goes past 60%-70%. Homeschooling 5 children with three meals a day may have something to do with it.
I am going to engineer the system in this way: Install a valve(probably using a reversing valve) to send compressor discharge into the air handler through a coil and back out to the regular condenser. Essentially making the system into a dehumidifier that only removes humidity.
The controls will work to keep the system in first stage when I do this.
Question....how big should the coil be that I install inside the air handler?? A 1.5 ton coil just seems to big, although that is the capacity of the system in first stage. The coil I have(1.5 ton evaporator) will not fit, so I was going to make it smaller.
I am not worried about static pressure loss...my duct work is running at .3 TESP right now with filters..it is perfect.