The Alpha HW110LC-36(P) is set for 115v(110v-120v) out of the box, and it also comes with a 230v(220v-240v) switch and the manual has instructions on re-wiring for 230v. 

At this link is a video made by our technicians, that you may find helpful for the rewiring process.

Also in the User Manual(link below), there are instructions for rewiring for 230V starting on pages 16-19 that you will need to rewire correctly.