How do you set up domestic hot water differential (20 deg. F. or 10 deg. C.)?

Change menu functions by pressing the screwdriver symbol. Enter password 000 by using the arrow keys. Confirm password by pressing the screwdriver key again. The Moducontrol display will indicate # 1. Using the arrow up key scroll to position # F bAS. Using the screwdriver key enter the parameter. Existing parameter should read # set differential. Change parameter by using the up arrow and toggle to the # new differential. Confirm the new setting by pressing screwdriver key. Exit from program menu by pressing the textbook key.