First add about 1.25 qts per pound of grain ( about 4 gallons) somewhere around 150-155 degrees F and let this sit for an hour, stiring occasionally. The grain will absorb about 1.25 gallons of this. (That should leave about 2.75 avail for draining.) Add another 1 gallon at about 170 Degrees F and let sit for about 5 min, then drain. Add another 3 gallons at about 170, stir and let sit for five min, then drain. You should get about 6.75 gallons from this.
Try this and see how it goes.