Breville Infuser BES840 Instruction Book page 16

PRE-HEATING
Heating your cup or glass
A warm cup will help maintain the coffee's
optimal temperature. Preheat your cup by
rinsing with hot water and place on the cup
warming tray.
Heating the portafilter and filter basket
A cold portafilter and filter basket can
reduce the extraction temperature enough
to significantly affect the quality of your
espresso. Ensure the portafilter and filter
basket are preheated with hot water before
initial use.
NOTE
Wipe the filter and portafilter dry before
dosing with ground coffee as moisture can
encourage 'channeling' where water by-
passes the ground coffee during extraction.
SINGLE WALL FILTERS
The Single Wall filters (1 & 2 CUP) are
designed to be used with freshly ground
coffee and allow you to experiment with
grind, dose, and tamp to create a more
balanced espresso.
The Single Wall filters have no markings on
the underside of the filter.
16
DUAL WALL CREMA
SYSTEM FILTERS
The Dual Wall filters (1 & 2 CUP) are
designed to be used with pre-ground coffee
and regulate the pressure to help optimise
extraction regardless of the grind, dose or
tamp pressure.
The Dual Wall filters have DUAL WALL
stamped on the underside of the filter.
THE GRIND
If grinding coffee beans, the grind size
should be fine but not too fine. The grind
size will affect the rate at which the water
flows through the ground coffee in the filter
basket and 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
coffee when under pressure. The resulting
espresso will be OVER EXTRACTED, dark
in colour and bitter in flavour
If the grind is too coarse the water will
flow through the ground coffee in the filter
basket too quickly. The resulting espresso
will be UNDER EXTRACTED lacking in
colour and flavour.