La San Marco 100 E/S PRACTICAL Use And Maintenance page 43

5.1 Adjustment of the boiler water level probe
The level probe is normally placed in a standard position for all models of the 100 series. Ho-
wever, if the client so desires, it is possible to increase or decrease the amount of water in the
boiler by adjusting the level probe as shown in the figure.
5.2 Adjustment of pump serving pressure
In models of the 100 series, the pump is located inside the coffee machine.
Calibration of the pump operating pressure is set by LA SAN MARCO SPA at 9 bar. If you want to change this
value, proceed as follows:
1) The standard location for the pump is the right side of the machine (looking at it from the work zone). To
access it, the right side must be removed (figure 11).
2) Press the coffee serving button in the models 100 S or the continuous serving button in the models 100
E to dispense water from a serving group.
3) On the lower graduated scale of the gauge, read the pump operating pressure.
4) Adjust the pressure using the adjustment screw of the internal pump (figure 11) of an external pump (fi-
gure 12). To increase the pressure, tighten the screw and read the corresponding value on the lower scale
of the gauge. To decrease the pressure, loosen the adjustment screw.
Figure 11
5) Once the desired pressure has been set, stop serving water and close the side of the machine.
5.3 Adjustment of steam pressure in boiler
The steam pressure in the boiler is shown on the upper graduated scale of the pressure gauge. The calibra-
tion of the steam in the boiler is set by LA SAN MARCO SPA at 1.0 bar. If you wish to modify this value, you
will need to turn the pressure switch adjustment screw on the inside of the machine, which can be accessed
directly from the work zone (figure 13-14). Using a suitable screwdriver, the pressure switch can be adjusted
without having to remove any panels. To increase the pressure in the boiler, turn the screw counter-clockwise.
To decrease the pressure, turn the screw clockwise. Read the pressure on the upper scale of the gauge.
Figure 13
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Figure 12
Figure 14
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