COFFEtek NEVA 4, Technical Manual

Page: 8 / 40

COFFE tek LTD
NEVA 4 Issue 1 22/02/08 8
GENERAL DESCRIPTION
9. The Neva 4 Beverage Machine is a free-standing unit which may be mounted on a
secure table, bench, cabinet or food and drink counter.
Cabinet Front
10. The cabinet front door has a large picture panel area and located within this area are 8
pushbuttons, which have removable front covers to enable fitting of individual selection
labels. On the rear of the door is the display for accessing product information and
machine settings plus the internal keypad, which provides access to the Operator’s and
Engineer’s Program.
11. The panel can, when unscrewed, be hinged to give access to the MPU, display lamps
and keyboard PCB.
12. A gear driven worm screw located in the base of each canister dispenses ingredients in
exact amounts. The ingredient is then mixed with hot water in a mixing bowl prior to the
beverage being poured from the dispense head. A plastic agitator, located inside the
canisters, ensures a free and consistent flow of powder. Additionally, a whipper unit,
located beneath the mixing bowls, ensures that the product and water are properly
blended.
13. The machine On/Off switch is located on the lower panel. Access to all other components
is either by removal of the motor shelf or side panels.
Cabinet Interior
14. Further access to the inner components is achieved by removing the left-hand side panel
by lifting it upwards, clear of its keyhole shifts. Removing this panel gives access to all
internal components.
15. The mains electricity supply cable enters the machine via a cable gland on the base
panel of the machine, where it terminates in a terminal block.
Water System
16. The main water supply enters the machine via a double chamber inlet valve, which is
mounted in the cabinet base panel. A length of tube then takes the water supply into the
top of the water boiler via an air break into a channel, which is directed to the bottom of
the heater tank.
17. Hot water is dispensed from the boiler, via the appropriate solenoid operated valve, to the
mixing bowl. A length of tube directs any overflow from the boiler to the waste tray.
18. The water is maintained at a constant level in response to signals from a water level
probe, which is connected to the Controller Board.
19. The water is heated to the required temperature by one or two heating element(s),
depending on the model. The Controller Board ensures that the temperature is
maintained to a predetermined level by controlling the supply to the heater(s) in response
to signals from the N.T.C. temperature sensor which forms part of the level/temperature
probe assembly. Safety cut-out switches mounted on the front of the boiler ensure that
power is removed from the heaters in the event that a fault with the control system leads
to the water in the tank beginning to boil.