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21 Slimline
Series
Adjusting the Optional Settings
To adjust the optional settings, follow these steps.
• Press and hold the Power button to turn the thermostat OFF ..............................
• Press and hold the Clock key until the display appears as shown below ..........
• Use the Clock key to cycle through the features ........................................................
• Use the Up/Down keys to change the setting ...................................................
• Press A to confirm settings .................................................................................................
• Press the Power button once again to turn the thermostat back ON .................
Setting Value
Feature Number