Honeywell RTH8500 User Manual download pdf (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

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Honeywell RTH8500 User Manual Page 20