Honeywell RTH8500 - Manuel (Page 20)

Operating Manual
69-2220EF—03 18
About your new thermostat
M28391
Battery replacement/Customer assistance
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
LO BATT
warning begins flashing. The warning flashes about 30
days before batteries are depleted.
Even if the warning does not appear, you
should replace batteries once a year, or before
leaving home for more than a month.
For assistance with this product, please visit
http://DIYthermostats.honeywell.com
or call Honeywell Customer Care toll-free at
1-800-468-1502 .
Grasp thermostat and pull to
remove fom wallplate
Insert 3 fresh AAA alkaline batteries
M28390