INSTALLATION
Speedster
page 8
2. The thinner electrical cable attached to the Speedster is the pump cable (see
Figure I 3
) and
has a special type of connector. Attach the pump cable to the pump motor using the special
connectors.
3. Attach the other cable to a 230 VAC earthed power outlet. If your Speedster came without a
mains plug, it is advised to attach the blue wire to the neutral in your power outlet. (Although
there is no difference in operational aspect, this makes it easier to check the electrics in case
of a malfunction.)
4. Make sure that the Speedster rests on its feet.
5. Put the 3-way brewing lever on the right hand side of the machine (
Figure W 1
, item 4) in the
lowest position (
Figure U 1
“pump active”).
6. Turn the mains switch on the machine to
“ON”, the coffee boiler filling is continued.
7. Wait until water without air leaves the group. This procedure expels all air from the coffee
boiler. A separate bleeding procedure is not needed.
8. After this move
the lever in its high “off” position. The machine will now automatically fill its
steam boiler.
The displays of both temperature regulators (see
Figure W 1
, items 2 & 17) will not show any value
until a minimum water level in the steam boiler is reached. Filling procedure will continue till it reaches
the maximum (operational) level.
When the temperature in the steam boiler reaches boiling point some steam will escape through the
anti-vacuum valve which makes a hissing or sputtering sound inside the machine. This will stop when
the valve is shut by the increasing pressure inside the steam boiler.
Adjust pump pressure
The right hand side pressure gauge displays the pressure in the coffee boiler. The minimum value
when the machine is at rest is the line 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 when back pressure is present (coffee puck). The pressure
generated by the pump is partly dependent on the line pressure of the building. The pump pressure
can be adjusted by turning the set screw on the right hand side of the brass pump housing (see
Figure
I 4
).
Notes
Do not set the pump pressure with a blind filter in the filter holder. When a blind filter is used water in
the system is trapped between a one-way valve and the blind filter. Therefore, the coffee boiler
pressure will not drop when the set screw is turned counter-clockwise.
When pump pressure exceeds approximately 12 bar, the expansion valve will open. Increasing the
pump pressure further will not result in higher coffee boiler pressure.
Do not set the operational pressure higher than 9,5 bar since this will reduce the life-span of valves,
etc. in your Speedster dramatically.
