Remove the BK jumper from the control board and wire Y1(Comfort Control) to Y(Furnace) to Y(Outdoor Unit)
Wire Y2(Comfort Control) to BK(Furnace)
Anytime Y1 energizes you will have 80% airflow. If Y1 satisfies the load conditions it will operate 80% for complete cycle. The only time you will have 100% airflow is when the comfort control energizes Y2.
I do not utilize comfort-r (enhanced mode) with this configuration and would not recommend this setup if you are operating at low ambient conditions.