Robertshaw RS9110 Operation Manual page 7

Caution:
When the battery icon
immediately to avoid damage to your HVAC system. Freezing or overheating
could occur.
Battery Door Information
Press the lower portion of
the thermostat to open the
easy access battery door.
THERMOSTAT QUICK REFERENCE
appears, replace the alkaline AAA batteries
Install two AAA
Alkaline batteries
into battery
compartment.
Be sure to match
positive (+) ends
of batteries with positive (+) battery
terminals in the battery compartment.
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