Honeywell RTH7600 Series Installation Instructions Manual page 15

About your new thermostat System setup
Step 1
Press and release the left button.
System & Fan
Step 2
Press and hold the center button until the screen
changes (approximately 5 seconds).
System
0120
Schedule Clock & More
0120
Fan
13
20
M27522
20
Done
M27523
69-2206ES—05
RTH7600