copper, iron, cadmium), chlorine and any organic pollutants/discolouration.
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 within the system at 0.5 bar.
3. Vibration Pumps
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 11.8 fl. oz. (350 ml) and is fitted with a 1250 W
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 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 43 psi (3 bar) mechanical relief
valve. It is closed during vends to allow higher pressures to be achieved within the
system.
8. Relief Valve - 43 psi (3 Bar) - Mechanical
The 43 psi (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 - 174 psi (12 Bar) - Mechanical
This valve provides overall system safety. The valve will open should the pressure
within the system exceed 174 psi (12 bar).
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Technical Manual
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