I purchesed the 342001 Pentair SuperFlo VS Variable Speed Pool Pump - 115/230v. I am trying to connect it to 115V. I know the pumps that can run on 115v or 230v usually have voltage switch but my pump did not have one. I am not sure if it may be auto-sensing.? . I have tree cables black, red and green. I know the green is ground but I am not sure how to if I should connect the red to L1 or L2. Can you please help me.