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• Preheattheportafilter by placing underneath the group head. Rinse with hot water from

the group head by holding down the double shot button on the front, right hand side of the

machine. Dry the portafilter thoroughly before use.

Unlike the Dual Wall Filters, the Single Wall Filters have no markings on the underside of

the filter.

• Placetheportafilter into the grinding cradle

• PresstheFILTERSIZEbuttonaccordingtothefiltersize(singleshotordoubleshot)you

select.

STEP 4 – ADJUSTING THE GRIND SIZE

• Whensettingthegrindsizeitshouldbefinebutnottoofineorpow-

dery. The grind will effect the rate at which the water flows through the

ground espresso in the filter and therefore the taste of the espresso.

• Ifthegrindistoofine(lookslikepowderandfeelslikeflourwhen

rubbed between fingers), the water will not flow through the ground

espresso even when under pressure. The resulting espresso will be over

extracted, too dark and bitter, with a mottled and uneven crema on top.

• Ifthegrindistoocoarsethewaterwillflowthroughthegroundespressotooquickly.Thiswill

result in an under-extracted espresso lacking in flavor and without the thick crema on the top.

STEP 5 – ADJUSTING THE GRIND AMOUNT

• WhengrindingforaSingleWallFilterusingafinerespressogrind,

you will need to increase the grind amount to ensure the filter is correct-

ly filled.

• Toincreasethegrindamount,turntheGRINDAMOUNTdialbeyond

theDUALWALLsettingtoobtainthecorrectamountofgroundespresso.

Note: You may need to try step 4 and 5 a few times, slightly adjusting

the GRIND SIZE and GRIND AMOUNT dials each time until you reach your desired com-

bination.

STEP 6 – GRINDING THE BEANS

• Fillthehopperwithfreshcoffeebeans.

• Ensuretheportafilter is inserted into the grinding cradle.

• Ensurethe FILTER SIZEbutton reflects thefilter sizeinsertedin the

portafilter.

• ForAutoStartandStop Grinding -pushtheportafilter in once to

activate the grinding switch, then allow the portafilter to be filled with

fresh ground espresso.

Note: To stop the auto grinding midway through a grinding cycle, push the portafilter in

once,orpresstheFILTERSIZEbutton.

• Formanualgrinding-pushandholdtheportafilter in until the desired amount of ground

espresso has been delivered.

Gastroback advanced pro g User Manual

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