Robertshaw RS8210 Operation Manual page 7

Important:
The low battery indicator is displayed when the 2x AAA batteries
need to be replaced.
Battery Door Information
Use the finger bevel on
the lower portion of the
thermostat to open the
easy access battery door.
THERMOSTAT QUICK REFERENCE
Replace with
2xAAA Alkaline
Batteries. High
quality Alkaline
batteries are
recommended.
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