FIRST USE
Spirit installation manual
page 26
If you wait longer than 5 seconds, the controller will leave programming mode automatically (all
LED’s unlit). Use of a stopwatch is advised.
Press down and release the hot water lever again when the desired quantity of water has been
dispensed. The electronic timer has now been set. The programming mode will last for another 4-
5 seconds after you have set the timer, therefore refrain from handling buttons or levers for
another 6 seconds.
During delivery of hot water some cold water is mixed in to obtain a non-spattering, quiet flow at the
right temperature for preparing Americanos. A secondary goal of this added cold water is to lower the
strain on the steam boiler as less hot water is needed from the boiler to get the same quantity. The
pump is activated whilst dispensing hot water.
After hot water has been dispensed, the steam boiler will start to re-fill to its pre-determined level
automatically. The incoming cold water needs to be heated to 125 °C quickly to retain full steam
capacity. For that reason, a jet with a diameter of 1.0 mm is installed at the entrance of the boiler fill
valve which restricts the flow of cold water to the boiler which allows the heating to (partially) keep up.
The pump is activated whilst the steam boiler is being filled.
The filling procedure is automatically delayed when hot water is dispensed. This prevents changes in
steam boiler and (cold) water supply pressure and thus ensures temperature stability of the dispensed
hot water.
Adjust coffee system pump pressure
The pressure gauge just left of each group displays the pressure in the corresponding coffee boiler. At
idle, the minimum value is the pressure of the incoming tap water (as in other water taps in your
establishment). Factory setting of the maximum pressure in the boilers is 12 Bar. Above this value an
expansion valve on the machine will open such that excess pressure is relieved 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).
A restrictor in the coffee system reduces the flow when a group is activated. This restrictor is placed in
between the heat exchanger and the coffee boiler. The diameter of the tubing in the group head has
the larger opening such that water can more easily flow “out of the group” than “into the boiler”. While
brewing espresso, with the group valve “open” and the pump activated, water will first fill the empty
infusion tube and dispersion plate and wet the coffee bed such that pressure in the corresponding
group will quickly drop to practically zero. After wetting of the coffee grinds, the pressure will gradually
increase to the set pump pressure (ideally 9 Bar).
The pressure at the outgoing side of the pump is proportional to the pressure at the ingoing side of the
pump (the pump simply multiplies the incoming pressure by a set amount). Therefore, you should
check and possibly adjust the pump pressure after installation. Adjustments are made by turning the
set screw on the right hand side of the brass pump housing (see Figure 16).
Procedure
1. Place a filter with ground coffee in a filter holder (this can be used coffee).
2. Activate that group by pressing and releasing the upper button (
Touchpad;
Bastone-autostop:
press down and release the brew lever).
3. Observe the pressure gauge of the activated group to check how the pressure evolves and wait
until it no longer increases.
4. To increase the pump pressure turn the set screw in the pump housing clockwise (see Figure 16).
Turn the screw counter-clockwise to decrease the pump pressure.
5. De-activate the group when the pressure is correctly set at 9 Bar.
Warning!
The set screw is made from brass, to avoid damage use a screw driver that fits the slot snugly.
