How do you set the inverter for 115AC single phase output
You may just be able to connect 2 of the 3 output lines to your motor, and derate the inverter by 50%. Setting output voltage should be straightforward (I've never used the VFD's from Keling, so I can't say for sure.)
Are you planning on running that pump on an inverter? It most likely won't work, and there may be easier solutions (such as a simple variac.)
Why do you want to run a single phase motor on an inverter?