How do I switch between 12 hr and 24 hr time on my thermostat?

The following steps will allow you to switch between Standard and Military time:

 

Setup options are performed using a menu on the display screen.

To  Access the Setup Menu:

    1. Move  the System  Mode  Temp switch into the OFF position.
    2. Move slide switch to RUN position.
    3. hold down the EMER button for approximately 5 seconds.
    4. The menu will always start with item #1 which is for the time format.
    5. Press the Up or Down button to select 12 HR or 24 HR.
    6. Wait 10 seconds and the thermostat will return to normal Run mode.