TECHNICIANS' manual20 of 100
2.8.22 Automatic steam wand (optional)
The “Automatic steam wand” system - tted on some ver-
sions with a display - enables milk to be automatically frothed
at the programmed temperature. The operating principle of
the automatic steam wand is listed below:
• Pressthespecicbutton(1), located on the left side of the
machine’s base.
• The solenoid valve opens (2) which consequently allows
thesteamtoowfromtheheatingunittotheautomatic
steam wand nozzle.
• The system simultaneously activates the air suction pump
(6) which is controlled by the control unit (3) and pow-
ered by the transformer (8). The milk froth can be adjusted
by changing the amount of air intake when opening the
valve (5).
• After the air has passed through the non-return valve (4),
it mixes with the steam in the mixing interface (11).
• Steam comes out of the nozzle (9).
• The probe (10) that is connected to the machine’s elec-
tronic control unit, detects the temperature of the milk
while it is being heated.
• Once the set milk temperature has been reached, the elec-
tronic system stops the air and steam from being dis-
pensed.
2
910
3
11
42
6
8
7
1
To adjust the milk temperature and froth, see
para. 6.5.
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