A motor stamped 115/230V is convertible between voltages. Usually, there is a connector or switch to rotate in the motor to set the voltage. This motor may be defaulted to 120V, so you'd have a hot and neutral. At 240V, you'll have two hots and no neutral. The semantics doesn't matter. What you need to know is where do you put the two wires for 120V -vs- 240V, and is there any jumper or thing to rotate to set the voltage.
At 240V, you could probably run this just fine from a 15A double pole breaker. At 120V, you may need a single pole 20A breaker. What are the nameplate amps?