GENEVA - Vending Machines
GENEVA - Vending Machines
GENEVA - Vending Machines
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COFFEtek Ltd<br />
WATER SYSTEM<br />
23. The cold water mains supply enters the machine via a double-solenoid operated inlet valve<br />
at the rear of the cabinet. This valve controls the flow of water to the unit’s hot water tank.<br />
If an optional cold drink system is fitted, a separate inlet valve is used to connect it to the<br />
mains water supply. In this eventuality a special ‘Y’ shaped mains water supply hose is<br />
required.<br />
Hot Water System<br />
24. Water is supplied via the Hot Inlet valve to the heater tank where it is heated to the required<br />
temperature by a heating element in the tank. Water temperature is controlled by a<br />
combined temperature and level probe assembly in the tank which causes the supply to the<br />
heater to be removed when the preset temperature is reached. The probe assembly also<br />
acts as a level sensor, causing the Hot Inlet valve to open when the water in the tank falls<br />
below a preset level. The probe (i.e. the input device) is monitored by the Controller Board,<br />
and the Water Heater and Hot Inlet valve (i.e. the output devices) are controlled by the DC<br />
RIO Board in response to signals from the Controller Board.<br />
25. Depending on the type of hot drink selected, hot water from the heater tank is fed via<br />
solenoid operated dispense valves to the appropriate mixing bowl or Brewer Unit container.<br />
Ingredients and water are mixed in exact quantities in the mixing bowl and then directed to<br />
the dispense head. Similarly, water and ingredient are brewed in exact amounts in the<br />
Brewer Unit and then directed to the dispense head.<br />
26. Resettable cut-out sensors, mounted on the boiler overfill tube, cuts off the electrical supply<br />
to the tank heater circuit if the water in the tank starts to boil. Additionally, if the fluid level in<br />
the overflow waste bucket rises above a preset level, it is detected by a level probe and<br />
reported to the Controller Board, which responds by closing the inlet valve via the DC RIO<br />
Board and rendering the machine inoperable.<br />
Cold Water System<br />
27. Water is supplied from the Cold Inlet valve to the chiller or carbonator unit (if fitted) via a<br />
pressure regulator. The chiller/carbonator provides either cold still water or cold carbonated<br />
water (carbonator only). The selected type of water (still or carbonated) is controlled by<br />
solenoid operated dispense valves. Flavoured syrup, if available, is added to the drink by<br />
means of oscillating pumps.<br />
9 06/08/2008 Issue 3 <strong>GENEVA</strong>