Install Batteries - Honeywell RTH7400D Owner's Manual

1. Install two fresh AA alkaline batteries on the back of
the thermostat as marked on the thermostat.
BATTERIES (2)
2. Remove tab labeled "Remove during installation"
in the lower right corner of the thermostat back.
REMOVE
TAB
Step 8. Install Batteries
BACK OF THERMOSTAT
23
BATTERY HOLDER
M22259
M22298
69-1726—1