HD7854/84
Build up: Steam circuit
Electrical circuit
Steam
seal
Reflux
valve in
milk
container
Thermo
block
Boiler
Water
Container
Venting
valve
Steam
pump
Water pump Inside the appliance
Overpressure
valve
p
m
n
ll
l
jj
hh
gg
ii
ff
dd
ee
k
bb
cc
Check valve
Three-way
valve with
Check valve
Brew
Chamber
g
h
e
d
f
aa
j
c
b
o
kk
i
a
Legend:
Low pressure tube
High pressure tube
Low pressure connections
High pressure connections
a - p
aa - ll
CONTROL
PCB
USER INTERFACE
PCB
CONNECTION
PCB
L
N
Boiler
Pump M
Steam
pump
M
Fuse
Push buttons
Temp. sensor
boiler
Water level
sensor
Descale tool
detector
Milk tank
detection
sensor
Fuse
Thermo block
Fuse
Fuse
Temp. sensor
Thermo block
Lid close
detection
switch
TCO
Z
Y
W
X
U
S
V
T
2-11
