Carrier TC-NAC Owner's Manual page 13

OPERATING THE THERMOSTAT
2. Press it down. This will disconnect the thermostat from the
top of the wall plate.
3. Remove the thermostat from the wall bracket com-
pletely by bringing it slightly toward you and lifting it up
and off the lip on the lower edge of the wall bracket.
4. Set the thermostat face down on a flat surface. You will
see the batteries in the lower right corner.
5. Remove and discard the old batteries.
6. Install new batteries by matching the "plus" and "minus"
ends of the batteries with the "plus" and "minus" indicat-
ors you'll see outside the two white battery shapes in the
space where the batteries sit.
7. Snap the batteries into place.
8. Put the thermostat back on the wall bracket by lining up
the slot on the bottom edge of the back of the thermostat
with the lip on the wall bracket. You will feel the slot fit
over the lip.
%