Just replace the cord cap on the cord with this one and you should be good to go. If you are not sure how to do have a qualified electrician do it for you.
http://www.stayonline.com/detail.aspx?ID=4770
Heres a link to a 20A IEC cord cap
http://www.stayonline.com/detail.aspx?ID=4770
Heres a link to a 20A IEC cord cap