Technical Principles
1ª review – UK 06 – 2019
12
A12. Boiler
The boiler works under pressure and has a capacity of 320 cc.It warms up the water for the
elaboration of the products, espresso coffee or soluble products.
D1. Electrovalves
D2. Temperature sensor (PTC)
D3. Clixon, rated at 120º C
D4. 1100 W heatting element
D5. upper cover
D6. lower cover
The boiler is made of brass and does not need any device to control the level of water as the
boiler fills automatically from the moment the machine is switched on. After this the water that
is used is replaced with water from the cold deposit so the boiler is always full.
There are three outlets; one through a 3-way
EV
for the elaboration of espresso coffee. This
EV
has an outlet from the boiler, another goes to the
infusion element
, and the third that, at rest,
allows the
infusion element
to be at atmospheric pressure.
E1. Solenoid
E2. Valve
E3. 3rd outlet
When the machine is in the espresso coffee making process, the third is closed while the outlet
from the boiler and the inlet to the
infusion element
are open to each other.
F1. 3rd outlet closed
F2. To the infusion group
F3. From the boiler
When the machine finishes elaborating an espresso coffee, the
EV
goes to rest state and closes
the outlet from the boiler leaving the
infusion element
open to the third outlet. In this way the
water that did not pass through the coffee and was retained in the
infusion element
goes out
through the third outlet to the residue bucket.
