ABB UNITROL 1020 - Battery Life Time Information; Mechanical Data

 Chapter 9 - Technical Data
UNITROL 1020 User Manual 3BHS335648 E82 175
9.1.6 Battery life time information
A battery is installed inside the panel. The battery keeps the clock operating in memory during
power interruptions.
Expected lifetime of battery at 45 °C > 10 years
To remove the battery, use a coin to rotate the battery holder on the back of the control panel.
Replace the battery with type CR2032.
NOTICE!
The battery is NOT required for any control functions except for the
clock.
9.1.7 Mechanical data