La San Marco 20/20 CLASSIC Series, Использование и обслуживание

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39
ENGLISH
Figure 8 Figure 9 Figure 10
2) Open the water supply on-off valve.
3) Lower the lever of a steam valve to allow the exit of the air in the boiler filling phase.
4) Reinstall the cup support tray and grate in their place.
5) Turn the knob of the main switch to position 1 so as to carry out automatic filling of the boiler with water.
When water reaches the level probe, filling stops and the blue “OK” LED of the electronic level control
comes on.
Note:
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0
(zero) and
then again to
1
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6
).
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f
(figure 9).
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1
and
2
: Position
1
starts the electronic automatic
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2
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switch to position
2
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water).
5. Adjustments
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MARCO SPA personnel.
5.1 Boiler level probe regulation
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possible to increase or reduce the quantity of water inside the boiler, adjusting the level probe
as shown in the figure.
_
+
5.2 Pump supply pressure regulation
a) Once the boiler is filled move the main switch to position 2 (the heating ele-
ments will start to heat the water).
b) Press the continuous brewing button 18 for electronic machines with automatic
dosing, in order that water spills out from the group corresponding to the pres-
sed button.
c) On the bottom scale of the pressure gauge 10, read the value of the water pres-
sure. The optimum pressure is 9 bar.
The pressure is adjusted to the desired value by operating on the pump screw:
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-
clockwise.