46
05/2008 Rev. 0.6
1.1 Boiler System
Turn on the device using the ON/OFF switch. The display will light up.
The magnetic valve (fig. 1-10) will open and the hot water reservoir (fig. 1-9) will be filled to the
maximum electrode. The heating element will be switched on. The display shows [ boiler filling ] and
[ boiler heating ]. As soon as the NTC sensor measures the set temperature, the heating element will
be switched off.
When a drink is being dispensed the water level drops and the maximum electrode is released;
the inlet valve (2.5 litres/min.) opens and immediately refills the reservoir until the maximum level
is reached again. If the water level falls under the minimum electrode level during operation, the
operating panel display will show [refilling boiler]. If the supply of water is not restored within 90
seconds, the display will show the error message [E3 level error] and shut off the inlet valve.
1.2 Temperature regulation
The heating element is turned on when the water temperature falls below the temperature setting and
the minimum electrode registers water. The temperature in the water reservoir is measured using an
NTC precision sensor mounted on the outside wall of the reservoir.
The water temperature also drops when drinks are dispensed. To avoid the temperature regulator from
responding too late, the heating element is switched on as soon as the inlet valve (fig. 1-10) opens
and cold water is added. The heating element switches off again as soon as the inlet valve shuts
off. The software can also be used to delay when the heating element switches off. See menu item
2.4 Settings / Temperature in the service menu. The heating element always switches off when the
maximum boiler temperature of 97˚C is reached.
1.3 Hot water dispensing
When dispensing drinks one of the dispensing valve (fig. 1-8) opens and hot water flows to the brewer
or mixer system. The flow velocity for each valve is set using the adjustment screw on the valve. The
amount of outflow is determined by the length of time that the valve stays open. In order to rinse the
brewer unit and mixer system, a small amount of rinsing water is released shortly after dispensing to
rinse away any ingredient residue.
1.4 Cold water dispensing (optional)
OptiFresh has a built-in cold water special base cabinet with built-in cooling unit. When
dispensing a cold-water recipe, inlet valve DV6 opens (fig. 1-21) and allows water to flow from the
mains to the cooling unit cooling coil (fig.1-20). The cooled water already present flows directly to
the cold water outlet (fig. 1-19). As soon as the valve shuts off again the cold water dispenser stops
immediately.
1.5 Ingredients and mixer system
The ingredients canisters (fig. 1-11) are powered by a 130RPM motor (fig. 1-12). The instant product
(ingredient) is forced out of the canister by a coil and drops through the dispensing bent pipes into the
mixer unit (fig. 1-17). At the same time, the dispensing valves (fig. 1-18) dispense hot water into the
mixer unit. The mixer motor (fig. 1-15) blends the instant product with water at a speed of 10,700 RPM
using the mixer rotor (fig. 1-16). The drink flows into the cup via the drink outlet (fig. 1-3). All individual
parts mentioned in this section can be sequentially coordinated using adjustable
parameters (timers) in the control unit.
