Operating Manual
Battery Replacement
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Insert fresh alkaline batteries.
P330-0110–AAA alkaline batteries.
P330-0220–AA alkaline batteries.
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Batteries are optional (to provide backup
power) if your thermostat was wired to run on
AC power when installed.
Install fresh batteries immediately when the
ing flashes about two months before the bat-
teries are depleted.
Even if the warning does not appear, you
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should replace batteries once a year, or before
leaving home for more than a month.
Batteries provide backup power to the display
during power interruptions. All settings are
permanently stored in memory, and do not
require battery power.
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warning begins flashing. The warn-
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