In the fritzing schematic you left some wires unconnected, how are they supposed to connect to the power cables?
Also, the datasheet specifies that there is a high shocking hazard when using that chip without isolation, and I don't see any on your schematic. I think it would be nice to have a couple optocouplers to isolate that chip from the RPi side. I don't know yet how to handle its power though.
In the fritzing schematic you left some wires unconnected, how are they supposed to connect to the power cables?
Also, the datasheet specifies that there is a high shocking hazard when using that chip without isolation, and I don't see any on your schematic. I think it would be nice to have a couple optocouplers to isolate that chip from the RPi side. I don't know yet how to handle its power though.