There is no such option on an amended return to carry the refund back only forward. If you owe for 2014 then the IRS will gladly keep the amount you owe and refund the rest. And if they don't you can make a payment when you get the refund.
Be aware that the processing of the amended return will take 16+ weeks or more so there is no way for the refund to get to the 2016 return before you will get a balance due letter so be prepared for that notice to come in the mail.
