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4.0 Power reserve
In the event of a power failure, the battery back-up provides for the maintenace
of correct time (approx. 1.5 years). Even without power and with a drained bat-
tery, the switching times remain permanently stored.
4.1 Battery loading
– Note the polarity of the lithium battery.
– Insert the lithium battery into the holder (see diagram 1).
– Push the battery holder into the battery compartment.
Press the battery holder down, untl it audibly locates.
4.2 Battery changing
Important Instructions
Battery changing with mains voltage
All memorised program data is maintained
Battery changing without mains voltage
Note: date and time are lost.
1. Lift the battery draw with a suitable screw driver (see diagram 3).
2. Remove the lithium battery from the holder (see diagram 2).
3. Note the polarity of the new lithium cell (Order No. 9 883 003).
4. Insert the Lithium battery into the holder (see diagram 1).
5. Push the battery holder into the battery compartment.
6. Press the battery holder down until it audibly locates.
7. Dispose of lithium battery in an environmentally friendly way.
Dia. 3
Dia. 2
Dia. 1
6


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