Espresso Group; Operation - Animo OptiBean Service Book

OptiBean (XL)

1.3 Espresso group

The espresso group consists of a drive unit [4.1] and an espresso unit [4].
The DC motor [4.1] in the drive unit drives the espresso unit.
The upper [4.5] and lower piston [4.7] are moved up and down by the drive wheels located in the side
walls. Their operation is explained in detail in the next chapter.
Major components Technical data
1. Bean canister Content 1.5 kg
2. Coffee grinder See 1.4 Coffee grinder
3. Coffee guide
4. Espresso group
4.1 Drive unit DC motor 24Vdc
4.2 Filler opening
4.3 Water supply 4 mm quick release coupling
4.4 Spring
4.5 Upper piston 315 —m bore
4.6 Brewer chamber Ø 37mm Standard / Ø 44mm XL
4.7 Lower piston 150 —m bore
4.8 Coffee outlet
1
2
3
4
Material
PC
stainless steel
stainless steel
stainless steel
stainless steel
4.3
4.2
4.4
4.1
4.5
4.6
4.7
M
4.8
14
OptiBean (XL)

1.3.1 Operation

The ground coffee is measured into the espresso group and then the group closes. Hot water is forced
at high pressure through the layer of coffee. The complete espresso cycle is described and illustrated
below. This also explains the function of the position switches 1 & 2 (see Section 1.3.2) located in the
drive unit.
Position
I
II
III
IV
Error E24
2013/08 Rev. 0.5 2013/08 Rev. 0.5
Action
Idle position of the espresso group. Ground coffee is
Start / ¿ ll
measured into the brewer chamber
The espresso group moves to the brew position.
Compact
The upper piston compacts the ground coffee.
A very small quantity of low pressure hot water is
added to the coffee pellet (pre-infusion). Then the
Brew
pump starts and pumps hot water at a pressure of 10
bar through the compacted coffee.
The espresso group moves back to the start position
Eject
and ejects the coffee residue.
If the switch position shown here occurs, an error
E24 brewer error occurs
I
IV
15
Switch position 2 1
0 0
0 1
1 1
GB
0 1
1 0
II
III