ТМ
APPENDIX A - HYDRAULIC CIRCUIT FUNCTIONAL CHECK METHOD
The vending machine hydraulic circuit is a set of assemblies and pipes, meant for making and giving
out of drinks.
The hydraulic circuit principle of operation is the following:
When connecting the vending machine to the water supply network, water is supplied through the water
supply solenoid valve.
When connecting the vending machine to the autonomous water supply system from canisters/bottles
- water is pumped into the hydraulic circuit by using the delivery water pump.
Thenwaterissuppliedviathetubestothevendingmachineoatchamberandwaterlter,watermeter
and water pump into the boiler.
IntheFRESHMILKoptionwaterissuppliedviathetubestothevendingmachineoatchamberandvia
thewaterltertothesplitter,whereit’ssplitintotwolines:therstoneisviathewatermeterandwater
pump into the boiler, and another one – via the water pump into the steam boiler.
The boiler heats the water up to the required temperature and then depending on the chosen drink it
is supplied to one of the four boiler channels: to espresso group, (Coffee) mixer (for NERO INSTANT),
(Chocolate/Milk) mixer, (Vanilla) mixer, or directly to the output nozzle (when choosing the hot water),
where the mixing with the required ingredient and giving out of the chosen drink to the customer via the
output nozzles occurs.
In the steam boiler water is heated up to steam condition and then via the steam supply valve (the valve
has to positions – open/close) is supplied to the cappuccinatore, where milk is also supplied. In the cap-
puccinatore, the milk foaming occurs with subsequent foam supplying into a drink.
Excess water and steam (FRESH MILK option) are supplied to the waste container.
Since the vending machine hydraulic system uses hot water under certain pressure, the essential
condition for providing safe and dependable operation of the vending machine is the successful operation
ofthehydraulicsystem,whichshouldberegularlycheckedinaccordancewithmethods,speciedinthe
appendix, and follow all the requirements put down in this manual.
The vending machine hydraulic system operation check should be executed with the open door with the
inserted open door trip.
Beforestartingthevendingmachineforthersttimevisuallycheckthatallthehydrauliccircuitelements
are securely interconnected, and water supply connection parameters correspond with the parameters,
speciedinthismanual.Failuretofollowtheserequirementscanleadtovendingmachinebreakdown.
Whenstartingthevendingmachineforthersttimevisuallycheckthesystemhasnoleaks.
Pay particular attention to the boiler and steam boiler (FRESH MILK option) because these units heat
water to high temperatures.
Visually check that there are no leaks at the boiler joints, otherwise the further operation of the vending
machines until the malfunction repair is PROHIBITED.
The boiler and steam boiler (FRESH MILK option), used in the vending machines, are meant for safe
operation with the rated pressure much higher than the operating pressure.
For safe boiler maintenance and repair, the vending machine should be disconnected from mains, and
water should be drained from the hydraulic system in accordance with this manual.
DISMANTLING THE BOILER BEFORE IT’S FULLY DRAINED IS PROHIBITED!
Boilers installed in the vending machines should undergo detailed examination, conducted in two stages:
Stage #1 - the examination is conducted on “cold boiler”, the boiler should be disconnected from the
system. On this stage, the boiler is thoroughly inspected to eliminate the facts of corrosion, erosion, defor-
mation, cracks and other external defects.
Stage #2 - the examination is conducted on “hot boiler”, the boiler should be connected to the system.
The vending machine should be connected to the water and electrical supply and switched on.
Theexaminationshouldbeexecutedbyusingthesoapywaterforclearidenticationofleaksincase
oftheirdetection.Aftersuchexamination,ushthehydrauliccircuitseveraltimesinaccordancewiththis
manual.
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