I believe that the By Pass is behind the panel under the sink. Open the door under the sink, and you'll see the panel. There are two box screws holding the panel in place. Remove the screws, and slide the panel to the right. That will expose the By Pass valves.
My 30.2 is under the sink. No panel to remove tho. You will have to kinda crawl back in there and you'll see the bypass between the red and blue colored lines. If you follow the blue and red lines from the tank each will "T" off, follow the line from the "T" to the bypass valve.