Instructions state prepare a three core electrical set with plug. Okay
Loosen the two copper screws marked with "V1 W1 & U1 and fasten the electric
Power leads to them.
But which one is hot(Black) and which one is Neutral(white) or does it matter.
I know where the terminal for the green ground wire goes. 110 volt motor.

There is another terminal they do not mention it the instructions v2-U2
Sit away from the rest? Must be for something else?
See picture V1-W1 terminal has a red wire and a black wire going to it. U1 terminal has a black wire going to it.

So which terminal get the hot wire?24782

Please only post in one location.

The U-V-W nomenclature is an IEC (European) standard, I have never seen it used on a single phase motor, but I don't do that much single phase work. (The NEMA, or American standard uses numbers to mark the wires instead of letters)

There are three coils inside the motor, the U coil, V coil, and W coil. The ends of each coil are marked 1 and 2: U1 and U2, V1 and V2, W1 and W2, etc. (U1 and U2 are the two ends of the U coil, etc) There also has to be a W2 wire, which is probably connected internally. My guess is the U and V coils are the run winding, which can be connected for 120 or 240 volt operation, and the W coil is the start coil?? But this is just a guess. I'm hoping someone from the metric world can answer this.

Motor manufacturers bring out all these leads to the connection box so the motor can be reversed, or wired for different voltages. The U2-V2 terminal is for one of these functions.

Most likely, since this is a pump, and has been configured for the American market, the pump manufacturer probably pre-wired the motor for the correct voltage and rotation, so just connect it per the instructions and don't get wrapped around the axle about the other stuff.

Oh, and it doesn't matter which terminal the hot wire goes to on a motor.