System Setup - Honeywell RTH7400 Series Quick Installation Manual

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
20
0120
Schedule Clock & More
20
0120
Fan Done
13
RTH7400/RTH7500 Series
M27459
M28069
69-2487EF—01