USER MANUAL
Spirit User manual
page 14
Notes!
The temperature sensor of the steam-boiler is placed above the water-level for quick response to
steam withdrawal. At temperatures below 110 °C (230 °F) the sensor will not register a change in
(water) temperature quickly. For that reason, the steam-boiler temperature may be up to 6 °C higher
than the Eco-setpoint at the moment you switch from Eco to operational mode.
Do not adjust the temperature of the hot water dispense by changing the temperature of the steam/hot
water boiler.
You can adjust the hot water dispense temperature by changing the pressure of the steam/hot water
pump.
Brew pressure gauge
In Spirits from October 2016 onwards, the pressure gauge no longer displays the pressure inside the
coffee boiler but the pressure in the line at the exit of the group valve, thus the actual pressure on the
coffee bed.
Pressure gauge that shows pressure on the
coffee bed. When the group is inactive, the
pressure displayed is thus (very close to) 0.
This means that when the group is inactive (open connection between coffee-bed and drain) the
pressure gauge will display 0 bar. When brewing a shot the coffee-bed becomes less permeable after
wetting (pre-infusion stage) and pressure will rise until brew-pump pressure is reached (ideally 9 bar).
If 9 bar pressure is not reached during a normal brew, either the pump pressure is set too low, or the
coffee bed was not able to produce enough counter pressure (not enough coffee grinds, coffee grinds
too coarse
, channelling in coffee bed during extraction, …), or the gauge is malfunctioning.
Checking opening pressure of expansion valve
You can check the opening pressure of the expansion valve of a group by first having a long flush
(about 20 seconds) then quickly locking in a blind filter and activating the group again. Pressure will
quickly rise to pump pressure and then the expansion of heating up the cold inflow of water will
increase the pressure inside the coffee system above pump-pressure. The gauge should reach a
maximum value between 11 bar and 13 bar and then remain constant. If the pressure rises above 13
bar, the expansion valve should be re-adjusted. If the pressure does not rise above pump-pressure,
the expansion valve may need adjustment or the one-way valve in that coffee-circuit may be
malfunctioning: call in a technician.
