Ron,Well, the manual states that "When solar is available, then the system will rotate the 3-Way Valve (this is the solar valve and should be valve A) and turn on the solar booster pump if applicable or increase
the RPM’s if an IntelliFlo® Pump is present. I don't have solar so I have no experience regarding this feature. I have attempted to find more info on this to see how it works but I am stumped. I did some playing around in different config settings in the IntelliCenter Web Client but I don't see anything. Hopefully, someone with some experience with this particular feature will chime in.
I used the solar 3-way valve signal to operate my bypass valve exactly as described. I did notice I had to reverse the switch on the valve actuator that was previously controlled by a Goldline solar control. There is a separate signal to use as a digital input for a non-Intelliflo pump but I found it easier to split the valve actuator signal and use it as a digital input to my 3rd party VS pump.
PS One of the fantastic features for Intellicenter is the amazing amount of additional control. You can set the sensed temp difference between the solar panel sensor and pool temp that opens and closes the valve for a fairly wide range. The optimum temp for these settings varies a lot with the specific temp sensing lag and piping run lengths. This a very well thought-out design feature!