2. Keypads
The keypads contain up to four seperate product buttons, single ristretto, single shot,
double ristretto, and double shot. Generally, the buttons are programmed to dispense 3/4
oz, 1 oz, 1-1/2 oz, and 2 ounces respectively, but they can be programmed to any desired
volume.
3. Semi-Automatic Dispense Switch
The semi-automatic dispense switch allows you to brew with the machine while by-
passing the electronic keypads. Activating the switch sends power directly to the group
valve allowing water to flow through the group head. This switch is generally used when the
fuse in the control box has blown.
4. Dual-Scale Pressure Gauge
The pressure gauge is divided into two sections,
top and bottom. The top portion of the gauge reads
the steam pressure in the rear boiler. The steam
pressure is factory set to 1.2 bar. The bottom
portion of the gauge reads the brewing pressure in
the front boiler. The gauge will read the static water
pressure going to the espresso machine, when the
machine is turned off. When the machine is turned
on, the heating elements will activate, heating the
water in both boilers. As the water heats up in the
front boiler, it expands. The front boiler is a closed,
totally saturated vessel, with no room for the water to
expand into. This causes the pressure to increase,
evidenced by the bottom protion of the gauge
climbing. Once the gauge needle reaches 12 bar,
the expansion valve, located in the drain box,
should unseat and prevent the pressure from climbing higher than 12 bar. If the gauge does
not reach or exceeds 12 bar, adjust the barrel of the expansion valve accordingly.
5. Coffee Boiler Heating Element Indicator Light
This red light illuminates whenever the heating element in the front, or coffee, boiler is
activated. When the water in the coffee boiler reaches the temperature the thermostat has
been set to, the thermostat will cut power to the heating element and the light will go out.
During initial machine start-up, wait for this light to go out before brewing.
6. Hot Water Dispense Switch
Depressing this switch activates the hot water solenoid valve, allowing the valve to open
and water from the steam boiler to exit the hot water nozzle. Steam pressure must be
present in the steam boiler to force water through the valve.
BOILER
PRESSURE
DISPENSING
PRESSURE
0,5
1
1,5
2
2,5
3
15
12
9
3
6
