5.5 ANTI-SucTION vAlvE
The anti-suction valve ensures that air enters the
heater during the machine cooling phase. In this
way the reduction of water volume due to cooling
does not create decompressions that may give
rise to drawbacks such as the suction of milk
throughthesteamnozzle.
WHEN TO REPLACE
You can assume that there are problems with the
anti-suction valve when water coming out from
heater is dirty.
The bad smell is generated from milk that has
been sucked into the heater.
In these cases the valve is closed and is locked
in this condition.
If the valve blocked open because of limescale
the signs would be:
A Continuous slight whistling sound coming
from the valve.
B Condensation drops near the valve.
NOTE
We suggest that the valve be replaced annu-
ally to ensure proper function and excellent
sealing.
HOW TO REPLACE
Using a 19 mm cup hex wrench unscrew the
valve from its housing.
When inserting the new one, coat the threads
with Teflon tape or with a few drops of Loctite.
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