Graef batessa Instructions D'utilisation page 22

Beans not fresh or coffee grounds not fresh (possibly pre-ground too
long).
Beans have been roasted too light.
Brewing temperature too low
OPTIMAL EXTRACTION
In case of optimal extraction, the espresso flows evenly, slowly and creamily "like honey" out of the outlet into the cup. The cream
is dense and dark brown to golden brown.
Brewing pressure from 7-8 bar up to 12-13 bar
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Contact pressure approx. 15 kg
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Coffee grounds evenly distributed in the group handle
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Optimal grinding level, not too fine, not too coarse
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Fresh beans or freshly ground coffee grounds
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Optimal water temperature, not too cold, not too hot
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OVER-EXTRACTION
In case of over-extraction, too many bitter substances are dissolved out of the coffee. Preparation takes a long time, the coffee flows slowly and
drop by drop into the cup. The coffee is very dark or the cream is dark brown to reddish and has an unpleasant and bitter or even burnt taste.
The outline on the cream is very uneven, with lighter spots being found between darker areas.
Brewing pressure over 13 bar
●
Coffee runs slowly (brewing time well over 30 seconds) and flows drop by drop into the cup
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The coffee tastes bitter and burnt
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Possible reasons for an over-extraction
Cause
Grinding level too fine (falls out of the outlet rather slowly, the coffee
grounds sometimes feel like powder when you rub it between your
fingers).
Too much coffee grounds.
Beans roasted too dark
Prior to preparation, coffee grounds clamped too long in the brewing
unit
Brewing temperature too high
SETTING THE WATER QUANTITY FOR
You can change the water quantity for
quantity is determined by a flow sensor.
Switch on the unit. The unit is heating up.
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If "GRAEF" appears on the display, the unit is ready for operation.
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Insert the desired filter insert.
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Grind the desired amount of coffee grounds into the group handle.
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Firmly press on the coffee grounds using the enclosed tamper. The distance between the upper edge and the ground coffee should be
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approx. 3 mm.
Clamp in the group handle.
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Place one or two cups underneath the outlet.
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Press either the or
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The preparation starts.
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After the desired quantity, press the
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The water quantity is saved for the selected cup.
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22
AND
cup and for
button for 3 seconds.
or button again.
Ideally, store the beans in the coffee packaging closed again. Oth-
erwise, light and oxygen will age the coffee. Only remove as much
coffee as you need in a short time.
Lighter beans have a slightly different brewing behaviour than dark
beans and are usually brewed at lower pressure. A delicious espres-
so with different flavours can also be prepared by adjusting the quan-
tity and grinding level. However, this can only be addressed briefly
in these instructions.
Adjust the brewing temperature in the menu
Solution
Grind coarser, slowly approach the optimum grinding level.
Use less coffee grounds, the grinding level may also need to be ad-
justed
This rarely happens with bought beans. For home-roasted beans, fin-
ish the roasting process earlier.
The coffee grounds can change the flavour due to the temperatures.
As a result, the coffee tastes burnt with otherwise optimal extraction.
After clamping, the brewing process should be started immediately.
Adjust the brewing temperature in the menu.
cups as you wish. The LCD display shows the processing time, but the water