3 About the unit
Installation Manual
6
D2CNL024A1AA
Wall-mounted condensing boiler
3P469346-12R – 2021.09
3.3
Components
a
l
m
n
o
k
ab
b
c
d
e
f
g
h
j
i
aa
y
z
v
p
q
r
s
t
w
x
u
a
Automatic air vent (heat exchanger)
b
Flow temperature sensor
c
Expansion vessel
d
Gas valve
e
Heat exhanger
f
3-way valve motor
g
Domestic hot water temperature sensor
h
Plate heat exchanger
i
Safety valve (3 bar)
j
Condensate trap
k
Ignition transformer
l
Flue gas temperature sensor
m
Burner hood
n
Ignition electrode
o
Ionisation electrode
p
High limit thermostat
q
Fan
r
Return temperature sensor
s
Silencer
t
Automatic air vent (pump)
u
Water pressure sensor
v
By-pass
w
Boiler pump
x
Domestic hot water flow sensor
y
Domestic hot water flow limiter
z
Filling valve
aa
Backflow preventer
ab
Flue gas adapter