(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 maintains water pressure to the pumps at 0.5 bar.
(3) Vibration Pumps - 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.
(4) Flow Meter
As water flows through the system, the flow meter sends pulses back to the
control board.
(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, set to operate at 120°C is mounted externally near the
top of the boiler and acts as a safety feature. A thermistor is mounted on 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) Safety Valve - 12 Bar (Mechanical)
This valve provides overall system safety. The valve will open should the
pressure within the system exceed 12 bar.
Technical Manual
84
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