40
OptiBean (XL) Touch
2018/02 Rev. 0.4
3.5.2 Service life
The service life of the ceramic grinding disks is approximately 3 times longer than that of the steel
grinding discs. The service life depends on the type of coffee beans* and is approximately 3,000 kg
of coffee beans. With an average measure of 7.5 g/cup, that makes approximately 400,000 shots
(XL=300,000 shots 9.5 g/cup).
When these grind quantities are reached, we advise you to replace the complete grinder. Not only the
grinding discs must be replaced. By then, the bearings, carbon brushes and drive belt would also have
reached their maximum service life. In case of a damaged grinding disc (due to stones or other foreign
objects), the discs can be ordered and replaced as a separate set.
*light to dark roast, dry or oily, caramelized
3.5.3 Run-in period of the grinding discs
Tests have shown that new ceramic grinding discs have a
run-in period of 10 kg of coffee beans (about 1350 cups at 7.5
g / XL=1000 cup at 9.5 g).
We recommend to readjust (to a finer setting) the
grinder after this period.
3.5.4 Replacing the grinding discs
1. Follow chapter 3.5.1 Basic adjustment till
point 5.
2. Switch off the machine.
3. Loosen the screws [1] and dismantle the
grinder head [2].
4. Remove the grinding disks [5] by loosening
the three screws [4].
5. Thoroughly clean all parts.
6. Fit the new grinding discs in reverse order.
7. Position the lower plastic sealing disc [5]
so that it shuts the bottom of the grinder
spout.
WARNING
• Do not drop the ceramic grinding discs.
• The grinding discs must never come into
contact with one another.
• After assembly, adjust the grinding
fineness.
2
3
4
1
5
