Operating Manual
Battery replacement
Pull at bottom to
remove thermostat
from wallplate.
Turn thermostat over,
insert fresh AA alka-
line batteries, then
reinstall thermostat.
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M27930
69-2259EFS
01
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Batteries are optional (for backup
power) if your thermostat was wired
to run on AC power when installed.
Install fresh batteries when the
ing. The warning flashes about two
months before the batteries are
depleted.
Replace batteries once a year, or
M27931
before leaving home for more than
a month. Batteries provide backup
power to the display during power
interruptions. All settings are perma-
nently stored in memory, and do not
require battery power.
8
warning begins flash-
570-209