Douwe Egberts Cafitesse 100, Service Manual

Page: 145 / 210

07.2004
5C - 7
Functions - Dosing System Service Manual Cafitesse 100
C.3.2 Function: Flexi Dosing System
2
3
1
• Every flexi-pack is a non-returnable pack.
It consists of a cardboard box (1) and a
unit containing the concentrate bag (2) and
the dosing pump (3) (fig. 1).
• The dosing pump cannot be taken apart.
• Concentrate bag and dosing pump form a
closed system into which no air from
outside can penetrate.
Due to this system and by inserting the
flexi-pack into the cooling compartment
- no bacteria contained in the air can enter
the concentrate.
- for coffee the durability and the quality of
the concentrate can be guaranteed at
6 °C (43°F) for up to 3
weeks.
• The cooling compartment can be equipped
with 1 flexi-pack. There is a dosing coil for
the flexi-pack underneath the cooling
compartment into which the dosing tube (1)
with dosing pump reaches (fig. 2).
• The dosing coil and the dosing pump form
a system which is current-controlled from
the microprocessor on the control circuit
board. The dosing pump delivers
- for coffee 0.105 ccm
contrate volume per pulse to the dosing
coil. Delivery is done as follows:
The tappet consisting of tappet ring (4), ring
carrier (3) and inlet valve (5) is pulled
downwards. The bellow (6) filled with
concentrate is pressed together and
delivers the concentrate onto the trough via
the outlet valve (8). Directly after the pulse
the bellow returns to its original shape and
new concentrate flows into it via the now
open inlet valve (5). (Fig. 2)
Cafitesse 110 (coffee or tea delivery)
•
When a delivery button has been actuated,
the flexi-pack dosing system doses
concentrate into the trough where hot water
is added.
Cafitesse 120 espresso delivery
•
When a delivery button has been actuated,
the flexi-pack dosing system doses
concentrate into the mixing funnel where
hot water is added. Afterwards the mixture
of concentrate and water passes through a
mixing unit.
Fig. 1
Fig. 2
1
2
3
4
5
6
7
8
9
Legend for fig. 2:
1 dosing tube
2 black floater
3ring carrier
4
tappet ring
5 inlet valve
6 bellows
7 outlet socket
8 outlet valve
9 outlet nozzle