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Operating the Thermostat
41
V
iewStat Color Communicating Thermostat User Guide
11. Use the navigation buttons to highlight More, and press Mode/Select to access the second
Advanced Setup screen.
12. Use the navigation buttons to highlight AxLink Setup, and press Mode/Select to access the AxLink
Communications screen (see FIG. 33).
13. Use the navigation buttons to scroll through the numbers until you reach the first digit in the code,
and press Mode/Select to move to the next digit in the code.
14. Repeat the previous step until you have entered the full three-digit code.
15. Press Mode/Select while Enter is selected.
Thermostat Setup
Setting First and Second Stage Differentials
Differentials set the tightness of the temperature control to eliminate large temperature swings and
prevent the HVAC system from operating too often. Normally the second stage of heat is for auxiliary or
emergency heat. Energy Star recommends that a programmable thermostat be capable of maintaining
room temperature swings within ± 2°F of the set point temperature.
Perform these steps to set the first and second stage differentials:
1. From the Main screen, press Mode/Select to access the Current Weather screen.
2. Press Mode/Select to access the 5-Day Forecast screen.
3. Press Mode/Select to access the Thermostat Mode screen.
4. Use the navigation buttons to select Settings, and press Mode/Select to access the Settings screen.
5. Use the navigation buttons to select Advanced Setup.
6. Press Mode/Select to access the Security Code screen.
7. Enter the security code, and select Enter to access the User Preferences screen. See the Entering the
Security Code section on page 28 for more information.
8. Use the navigation buttons to highlight More, and press Mode/Select to access the second User
Preferences screen.
FIG. 33 AxLink Communications screen
Changing the address of an AxLink device can result in some features on the thermostat to stop
working.