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Backlighting (INDIGLO
®
Night-Light)
Your thermostat has an electroluminescent lamp that back-
lights the display for easy viewing in the dark.
When any key is pressed the display is illuminated.
The display will remain illuminated for 15 seconds after
the last key is pressed. This allows the light to stay on if you
need to operate several keys. The backlight will decrease in
brightness before shutting o.
NOTE: The backlight is powered by the 24V AC supply. It
will not operate when there is an AC power interruption or
if the thermostat is removed from the wallplate.