Salus ST620ROF Instruction Manual page 8

2. INSTALLATION
ST620 Programmable Room Thermostat
Getting Started...
Installing the ST620 Batteries
To open the case of the ST620, undo the securing screw on the
bottom.
Now pull the screw down until it stops, then carefully separate the
two halves of the case by gently pulling out an upwards direction.
You will now see the battery compartments on the rear of the front
fascia as shown.
Ensure that the batteries are inserted correctly and check the
polarity.
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ST620ROF INSTRUCTION MANUAL