USER MANUAL
Speedster
page 13
4.
Change the temperature by pressing one of the arrowed keys. The newly set
value appears in the display.
5.
Press the P key twice to enforce the newly set temperature.
Figure 6. Showing steam boiler temperature regulator.
Adjust pump pressure
The right hand side pressure gauge displays the pressure in the coffee boiler. The
minimum value is the pressure of the incoming tap water (as in other water taps in your
house). Factory setting of the maximum pressure in the boiler is 11-13 Bar. Above this
value an expansion valve on the machine will open thus bleeding excessive pressure until
the maximum value is no longer exceeded (this occurs when water with a lower
temperature than the set value enters the coffee boiler, heats up and thus expands).
While brewing espresso, with the group valve “open” and the pump activated, the
pressure is supposed to increase up to 9 Bar (factory setting). The pump pressure can be
adjusted by turning the set screw on the right hand side of the brass pump housing (see
figure 7).
Tools needed
Screw driver
Procedure to adjust the pump pressure:
1.
Place a filter with ground coffee in the filter holder (this may be used coffee).
2.
Activate the group by slotting the brewing lever in its lower position.
3.
Observe the right hand pressure gauge to check how the pressure evolves.
4.
To increase the pump pressure turn the screw in the pump housing clockwise.
Turn the screw counter-clockwise to decrease the pump pressure.
Beware!
The set screw is made from brass and is easily deformed. To avoid
damage use a screw driver that snugly fits the slot.
Steam boiler temperature regulator
