CAUTION: Installing batteries backwards can damage the thermostat.
11. Install two fresh “AA” alkaline batteries in the battery compartment.
Be sure to match positive (+) ends of batteries with positive (+) battery
terminals in the battery compartment. (The thermostat will operate
from 2 size “AA” alkaline batteries or 24VAC power. When operated
from 24VAC power, your thermostat will maintain time and
continuously display the temperature during a loss of AC power with
the batteries installed).
12. Replace the cover on the thermostat by snapping it in place.
13. Turn on power to the system at the main service panel.
14. Test thermostat operation as described in the following section.
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