COFFEtek VITRO S2 Series User manual

VITRO S2/3 RANGE
TECHNICAL MANUAL
81038540
Revision 1

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VITRO S2/3 BEVERAGE MACHINE
TECHNICAL MANUAL
FOREWORD ..................................................................................................................................4
SECTION 1 TECHNICAL INFORMATION......................................................................................6
INTRODUCTION ................................................................................................................................................6
SERVICES REQUIRED......................................................................................................................................8
Electrical Supply.............................................................................................................................................8
Water Supply..................................................................................................................................................8
GENERAL DESCRIPTION.................................................................................................................................9
Cabinet Front..................................................................................................................................................9
Cabinet Interior...............................................................................................................................................9
WATER SYSTEM.............................................................................................................................................10
Heater and Boosting.....................................................................................................................................10
Tank Filling & Overflow Protection...............................................................................................................11
ELECTRICAL AND ELECTRONIC SYSTEM..................................................................................................12
Functional Description..................................................................................................................................12
Circuit Description ........................................................................................................................................13
SECTION 2 PROGRAMMING ..................................................................................................... 14
INTRODUCTION ..............................................................................................................................................14
INTERNAL KEYPAD LAYOUT........................................................................................................................15
KEYPAD FUNCTIONS.....................................................................................................................................15
OPERATOR PROGRAM..................................................................................................................................16
ENGINEER PROGRAM ...................................................................................................................................18
Program Options ..........................................................................................................................................19
SECTION 3 INSTALLATION AND MAINTENANCE .................................................................... 44
INTRODUCTION ..............................................................................................................................................44
SAFETY WARNINGS.......................................................................................................................................45
FROST WARNING...........................................................................................................................................46
INSTALLATION ...............................................................................................................................................46
Location........................................................................................................................................................46
Levelling .......................................................................................................................................................46
Securing .......................................................................................................................................................46
CONNECTING THE WATER SERVICES........................................................................................................48
CONNECTING THE ELECTRICAL SERVICES..............................................................................................49
DESCALING THE TANK .................................................................................................................................51

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COMMISSIONING............................................................................................................................................52
DAILY HYGIENE.......................................................................................................................... 54
CLEANING INSTANT UNITS...........................................................................................................................54
CLEANING THE COFFEE BREWER..............................................................................................................54
RESET COUNTERS.........................................................................................................................................56
WEEKLY HYGIENE.............................................................................................................. 57
CLEANING TEA BREWER..............................................................................................................................57
CLEANING INSTANT UNITS...........................................................................................................................57
FILLING PRODUCTS................................................................................................................... 59
FILLING BEAN HOPPER ................................................................................................................................59
FILLING PROCEDURE (INSTANT & TEA).....................................................................................................59
FAULT FINDING GUIDE.............................................................................................................. 60
SECTION 4 SCHEMATIC AND EXPLODED PARTS DIAGRAM................................................. 62

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FOREWORD
1. The information contained in this technical manual is applicable to the Vitro S2/3 Beverage
Machine Range. Due to customer requirements some units may vary from the one
described in the manual.
2. Personnel who have undergone relevant equipment training must only undertake
maintenance of the beverage machine.
3. The manufacturer reserves the right to make changes, without notice, to the design of the
beverage machine, which may affect the information, contained in this manual.
4. The Vitro S2/3 Beverage Machine is designed for indoor use, in an environment with an
ambient temperature range of between 1ºC and 40ºC.
5. THIS APPLIANCE CAN BE USED BY CHILDREN AGED FROM 8 YEARS AND ABOVE
AND PERSONS WITH REDUCED PHYSICAL, SENSORY OR MENTAL CAPABILITIES
OR LACK OF EXPERIENCE AND KNOWLEDGE IF THEY HAVE BEEN GIVEN
SUPERVISION OR INSTRUCTION CONCERNING USE OF THE APPLIANCE IN A SAFE
WAY AND UNDERSTAND THE HAZARDS INVOLVED. CHILDREN SHALL NOT PLAY
WITH THE APPLIANCE. CLEANING AND USER MAINTENANCE SHALL NOT BE MADE
BY CHILDREN WITHOUT SUPERVISION.

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Section 1
Technical Information
INTRODUCTION
1. The Vitro S2/3 Beverage Machine dispenses hot beverages in response to a capacitive key
selection. All beverages are dispensed in cup measurements. A liquid crystal display
provides status indications and operational information. All operations are microprocessor
controlled.
2. A cup is placed under the dispense head and the selection is made via a capacitive key
selection. The drink is then dispensed in the required quantity. The machine does not
accept money, but a feature such as this can be added.
3. The status of the machine may be monitored, and the configuration altered, by accessing a
program using the keypad and display. The program offers a menu of options; each
consisting of a number of sub-options which can be altered.
4. The Vitro S2/3 Beverage Machine has a feature, which heats the water in the boiler very
quickly, with one heater connected, from a 230V~, 16A single-phase supply.
FIG 1.1 VITRO S3 BEVERAGE MACHINE
Model shown is S3 FBT

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SERVICES REQUIRED
Electrical Supply
5.
(a) Single Heater Operation
Supply voltage : 230V~, 50Hz, single phase, fused supply
Current rating : 10A/16A
(b) The fused electrical supply should terminate at an appropriate isolator located within
1m of the beverage machine.
Water Supply
6.
(a) 15mm dia. Water mains supply, terminating at a convenient stop tap located within
1m of the beverage machine.
(b) Water pressure : 0.1 MPa minimum, 0.8 MPa maximum
(c) A 15mm double backcheck valve, with inspection port, should be fitted prior to the
flexible hose. The mains Water Supply should be fitted with a suitable water blocker.

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GENERAL DESCRIPTION
7. The Vitro S2/3 Beverage Machine is a free-standing unit which may be mounted on a
secured table, bench, cabinet or food and drink counter.
Cabinet Front
8. The cabinet front door has a large glass panel and located within this panel are 10
capacitive touch switches. On the rear of the door is the display for accessing product
information and machine settings with an internal keypad which provides access to the
Operator’s and Engineer’s Program and a USB port
9. The panel can, when unscrewed, be hinged to give access to the ZMCU control board,
button control board, ZMCU adaptor and capacitive touch PCB’s.
Cabinet Interior
10. A swivel open door provides access to the plastic product containers, each fitted with a
gear driven worm screw located in the base of each canister to dispense ingredients in
exact amounts.
The ingredients are mixed with hot water in mixing bowls prior to the beverage being
poured from the dispense head.
A plastic agitator is located inside of the milk topping and chocolate canister to ensure free and
consistent flow of product. Additionally a whipper unit, located beneath the mixing bowls,
ensures that the product and water are correctly mixed.
The ingredient canisters must be removed for filling of the products and when all three
canisters are removed and steam hoods of the mixing bowls are removed the extract chamber
can be removed for cleaning.
11. Located on the upper left hand panel is the machine on/off switch, which controls the power
to the MPU, power supply. Access to all other components is either by removal of the lid
assembly/boiler cover and motor shelf.
12. Further access to the inner components is achieved by removing the left-hand side panel
by unscrewing the location screw and then the panel will drop down clear of its keyhole
slots. Removing this panel gives access to all internal components.
13. 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. The supply is then connected via
the terminal block, line filter to the on/off switch on the front of the machine.

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WATER SYSTEM
14. The main water supply enters the machine via an 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.
15. 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 via overtemp safety
thermostats to the waste tray.
16. The cold water mains supply enters the machine at the base of the cabinet and connects
with inlet valve, which controls the flow of water to the boiler. The water is maintained at a
constant level in response to signals from a water level probe which is connected to the
Controller Board.
17. The water is heated to the required temperature by a single element. The Controller Board
ensures that the temperature is maintained to a predetermined level by controlling the
supply to the heater in response to signals from the N.T.C. temperature sensor which forms
part of the level/temperature probe assembly.
18. Hot water from the boiler is fed directly to the mixing bowls where it mixes with the
dispensed ingredient to produce the selected beverage. Solenoid operated valves
distribute the hot water to the selected mixing bowl, the amount of water being determined
by the program setting.
19. The temperature of the water is monitored by the Controller Board via a sensor inserted into
the tank, thus causing the supply to the heater to be removed when the water in the boiler
reaches its required temperature setting. If the temperature in the boiler increases causing
the water to boil over, the water will flow over the overtemp sensors which will cut off the
electrical supply to the heating elements. This sensor is mounted on top of the heater tank
and are re-settable.
Heater and Boosting
20. The heating control system employs an intelligent algorithm to obtain maximum
performance as follows:-
Boost operation takes place when the inlet valve opens following a selection being taken. The
heater control algorithm is instructed to turn on the SSR for the duration specified in the
variable CUP BOOST
If the temperature is 3° more than the DESIRED TEMPERATURE, set in the CHANGE
SETTING MENU all boosting operations are disabled.
If the actual temperature is between 0 –1.5° less than the DESIRED TEMPERATURE the
SSR toggles ON & OFF unless a boost operation is in progress then the SSR are ON.
If the actual temperature is between 2° - & 3° less than the desired temperature the SSR is
ON. Boost operations are as above.
If the actual temperature is more than 3° below the desired temperature the SSR’s are ON.