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Technical Manual
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 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 gravity tank to the required temperature by the heating
element rated at 1.2kW. The mains voltage required for the element is switched by a
solid state relay and I/O board controlled by the vending machine control board 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 if the
required water level has not been reached.
At this point all outputs from the controller board (including the heater element) will
be switched off and the display will show the message “Sorry Out of Service, Fill
Timeout”.
7.2.2 Espresso Machines
The water system fitted to Espresso 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 – section 5.7.9 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.
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Summary of Contents for COTI
Page 1: ...Part No 403018 Issue April 2021 Technical Manual From software version 3 7 1 ...
Page 2: ......
Page 30: ...Section 3 Programming Mode 20 ...
Page 35: ...Section 4 Customising the User Interface Technical Manual 7 8 9 10 11 25 ...
Page 128: ...Section 8 Espresso System 8 2 1 Espresso Water Flow Diagram 118 ...
Page 148: ...Section 11 Electrical Electronic Diagrams Atlas H Board Pin Connections COTI 138 ...
Page 150: ...Section 11 Electrical Electronic Diagrams Atlas H Board Pin Connections LINEA 9 10 1 140 ...
Page 152: ...Section 11 Electrical Electronic Diagrams 11 8 Input Circuit 1 COTI 142 ...
Page 154: ...Section 11 Electrical Electronic Diagrams 11 10 Input Circuit 1 LINEA 144 ...
Page 156: ...Section 11 Electrical Electronic Diagrams 11 12 Output Circuit 1 COTI 146 ...
Page 158: ...Section 11 Electrical Electronic Diagrams 11 14 Output Circuit 1 LINEA 148 ...
Page 168: ...NOTES 158 ...
Page 169: ......