Crane Voce Media, Техническое руководство

Страница: 81 / 116

Technical Manual 73
Se
cti
o
n
8
- B2
C
(Esp
re
ss
o
)
Syste
m
A FRESH APPOACH TO VENDING
Section 8 - B2C System
B2C machines are capable of producing high quality espresso based drinks through the
unique CoEx® brewer unit either independently (Espresso, Americano), or in conjunction
with soluble product (Cappuccino, Caffe Mocha etc). The machine will also vend high
quality freshbrew coffee from pre-ground product.
8.1 Vend Sequence
When an Espresso drink is selected the following sequence occurs:-
1. The customer selects an espresso drink. Fresh beans are delivered into the grinder
and the grinder is operated for a pre-determined time. Ground coffee is deposited
into the CoEx® brewer.
2. The brewer moves to the vend position. The brewer motor starts running
clockwise, causing the filter assembly to cover the piston chamber and the piston
to move upwards, forming the ground coffee into a compressed pellet as it does so.
3. When the heater reaches the correct temperature the inlet valve is opened and the
3 bar pressure relief valve closed. At the same time the pumps will start pumping
water through the system and into the brewer.
4. Whilst water is passing through the system a water flow meter will send pulses
back to the main controller and the espresso selection will be delivered into the
cup.
5. Once the required amount of water has been pumped through the system, the
inlet valve closes and the pumps stop pumping water through the system. The
brewer compresses the used coffee pellet, the pressure relief valve is opened and
the espresso valve switched off.
6. The brewer motor reverses and drives the piston back up to the top of the
chamber. The wiper mechanism ejects the used coffee pellet into the dry waste
container and the brewer piston moves back to the stand-by position.
8.2 System Overview
Important: The machine must be operated in conjunction with a water filter of food
grade quality, capable of removing temporary hardness (scale), heavy metals (lead,
copper, iron, cadmium), chlorine and any organic pollutants/discolouration. Crane
Merchandising Systems recommend the Brita AquaQuell water filter for use with B2C
machines.
1. Water Inlet Valve
A 24V dc single solenoid water inlet valve. When a drink is selected the inlet valve is
opened. At the same time the pumps are operated, pumping water through the system.
2. Reducing Valve
An inline reducing valve that maintains water pressure entering the system at 0.5 bar.
3. Flow Meter
As water flows through the system, the flow meter sends pulses back to the control
board.