Thermostat Startup After Total Power Loss.
On installation, or when power is restored after a total power loss to the thermostat, your thermostat will automatically maintain a heating temperature of 62°F (16°C) and a cooling temperature of 85°F (29°C).
If the 24 volts from the Heating/ Cooling transformer is lost, your thermostat will lose its display in 2 minutes and may lose time in about 6 hours. This hold up time will be much shorter if the control had not been
powered for at least 4 hours prior to the power outage. When power is restored, the thermostat will return to the temperatures listed above.
If this happens, set the clock and day of the week (use PROGRAMMING steps 1 through 6 from “Entering Your Program” page 7), then select HEAT, EMER, COOL or AUTO using the SYSTEM key, and press PROGRAM RUN to resume operation with your previously set program.
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