Robertshaw RS9210, Operation Manual, Page: 7 / 20

Battery Door Information
Install two AAA
Alkaline batteries
into battery
compartment.
Be sure to match
positive (+) ends
of batteries with positive (+) battery
terminals in the battery compartment.
Press the lower portion of
the thermostat to open the
easy access battery door.
THERMOSTAT QUICK REFERENCE
5
Caution:
When the battery icon appears, replace the alkaline AAA batteries immediately to avoid
damage to your HVAC system. Freezing or overheating could occur.