Crane Voce Media, Technical Manual, Page: 75 / 116

Technical Manual 67
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A FRESH APPOACH TO VENDING
Section 7 - Technical Information
7.1 Water Services
The mains water supply provides water for the heater tank and the pressure system fitted
to Espresso (B2C) machines. Water enters at the rear of the machine through a solenoid
operated inlet valve operating at 24v DC, which opens or closes the water supply as
required.
7.2 Hot Water System
7.2.1 General
1. Water is heated in the heater tank to the required temperature by a heating
element rated at 2.4 Kilowatts. The mains voltage required for the element is
switched by a solid state relay, controlled by the vending machine controller via an
analogue signal transmitted by the thermistor probe.
2. The water level inside the heater tank is controlled by a water level probe. When
the water drops below the required level, the controller board operates the mains
water inlet valve until the required water level is restored.
3. A series of 24v DC control valves are mounted on the outside of the heater tank.
These supply heated water to each of the mixing stations where ingredients are
added to make the drink. The “hot water” valve dispenses straight into the cup.
4. Should the inlet valve fail (or mains water supply be disabled), the controller board
will detect a fault after the inlet valve ‘open’ signal has been active for 2 minutes
and the required water level has not been reached.
At this point the keypad will be disabled, all outputs from the controller board
(including the heater element) will be switched off and the LCD will show the
message “Sorry Out of Service, Fill Timeout”.
7.2.2 B2C Machines
The water system fitted to B2C machines is described in detail in this manual , refer to
Section 8.2 - System Overview for full details.
7.3 Ingredient Dispense
1. The ingredients required for making up either an instant or freshbrew drink are
contained in ingredient canisters and are dispensed by means of an auger located
in the base of each canister. Each auger is driven by a 24v DC 128 RPM motor.
2. The amount of product dispensed by each canister is controlled by the vending
machine controller and may be adjusted via the Selection Timers menu , refer to
the Engineers Program – Para. 5.7.2 for full details.
3. The required ingredients for each vend are delivered to the mixing bowl, where
they are blended with hot water by a high speed whipper prior to discharge at the
dispense head.