Honeywell RTH8500D Thermostat User Manual


 
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Step 8. Install Batteries
1. Install three fresh AAA alkaline batteries on the back of the
thermostat as marked on the thermostat.
2. Remove the tab labeled “Remove during installation” in the
lower right corner of the thermostat back.
BACK OF THERMOSTAT
M22212
BATTERIE
S
(3)
+
+
+
+
+
REMOVE DURING
INSTALLATION
M19920
REMOVE
TAB
REMOVE DURING
INSTALLATION