Introduction / Basics 14
1.5.3 Brewer
Description - structure
• A vertically arranged piston brewer is installed without an ejection mechanism for each brewing group.
• The brewing piston/distributor sieve is connected with the brewer spindle via a bayonet connector and is protected from being pulled out with a pis-
ton lock.
• The vertically tamped ground coffee are brewed with hot water from top to bottom.
• The spindle is protected from dirt from the ground coffee chute with a bellow seal valve.
• The brewing end position (brewer calibration) is detected by a microswitch at the upper end of the brewing spindles.
Starting from this end position, all travel orders are identified which read from a Hall sensor in the brewer drive. The brewer calibration is carried out regu-
larly, several times a day.
Structure of the brewing group
o Brewer end position (microswitch)
o Brewer spindle
o Brewer drive (with Hall sensor)
o Piston block
o Brewing piston/distributor sieve
o Ground coffee chute
o Portafilter
o Safety switch
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