Astoria 1GR Use And Maintenance Manual page 21

2.9.22 Automatic steam wand (optional)
The "Automatic steam wand" system - fitted 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:
• Press the specific button (1), located on the left side of the
machine's base.
• The solenoid valve opens (2) which consequently allows
the steam to flow from the heating unit to the automatic
steam wand nozzle.
• The system simultaneously activates the air suction pump
(6) which is controlled by the control unit (3)and powered
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.
11
TECHNICIANS' manual
2
10 9
To adjust the milk temperature and froth, see
para.
4
2
7
8
1
3
6
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