Crane Voce Media, Техническое руководство

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74 VOCE Media
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4. Vibration Pump/s - 230V ac
When a drink is selected the pumps switch on at the appropriate moment until the
required amount of water has been pumped through the system.
5. Pressure Boiler
The pressure boiler has a capacity of 350ml and is fitted with a 2kW heating element.
Cold water is diffused as it enters the boiler through the lower coupling. Heated
water exits the boiler through the top coupling. A resettable temperature cut-out is
mounted externally near the top of the boiler as a safety feature. A thermistor is
mounted in the front of the boiler to measure water temperature.
6. Espresso Valve
Supplies heated water to the CoEx® brewer when an espresso or freshbrew drink has
been selected.
7. Pressure Valve
This valve is normally open exposing the system to the 3 bar mechanical relief valve.
It is closed during vends to allow higher pressures to be achieved within the system.
8. Relief Valve - 3 Bar (Mechanical)
The 3 bar pressure valve is a mechanical safety valve. The valve allows for heat
expansion while the machine is in stand-by mode.
9. Grinder Mechanism (Not Shown On Water Flow Diagram)
The grind mechanism consists of a 230V ac conical grinder with a manual
adjustment. When an espresso based drink is selected the grinder will run for the
programmed time, grinding beans and feeding the brewer at the same time. The
grinder is fitted with a manual adjusting mechanism which allows the engineer to
vary the size of the ground coffee in order to satisfy customers’ taste preferences.
10. CoEx® Brewer (Not Shown On Water Flow Diagram)
The brewer unit is capable of receiving between 5 and 9 grams of ground coffee.
Once the coffee has been ground and dispensed into the brewer unit, the 24V dc
brewer motor drives the brewer to the vend position using the current sensing as
control. The coffee is compressed into a round ‘cake’ and water is pumped through
the brewer. When the required amount of water has passed through the brewer, the
now wet coffee ‘cake’ is squeezed, removing most of the water from the ‘cake’,
preventing the brewer becoming unnecessarily dirty. After the ‘cake’ has been
squeezed the brewer will deposit the cake into the dry waste container and return to
the stand-by position.