Where the amount of the future payments of compensation is uncertain, the board shall, upon the approval of the agreement or the entry of an award, determine as nearly as may be the total amount of payment to be made, and the additional compensation so calculated shall, immediately upon such determination, become due and payable by the employer. The amount may be redetermined by the board, and any increase shall then become due and payable, and any excess, which shall be shown to have been paid, shall be returned to the person paying the same. Upon determination of the amount due, it shall be deposited as above provided. Payments of compensation out of deposits shall be made to the employe or dependents as payments of other compensation are made: Provided, however, That the board may, in its discretion and upon inquiry as in cases of commutation, accelerate such payments.
77 P.S. § 1420