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
yz
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 (3bar)
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
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