3 About the unit
Installation manual
7
D2CND024A1/4AB + D2TND012~024A4AB
Wall-mounted condensing boiler
3P469346-3N – 2019.11
3.3 Components
Components of models D2CND024A1AB and D2CND024A4AB
a
b
c
d
e
f
g
h
i
j
k
aa
l
m
n
o
p
q
r
s
t
u
v
w
x
y
z
a Automatic air vent (heat exchanger)
b Flow temperature sensor
c Expansion vessel
d Gas valve
e Heat exchanger
f 3-way valve stepper 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 Burnerhood
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 Internal filling valve (included in model D2CND024A1AB
and not included in model D2CND024A4AB)
aa Flue gas adapter
Components of models D2TND012A4AB, D2TND018A4AB and
D2TND024A4AB
a Automatic air vent (heat exchanger)
b Flow temperature sensor
c Expansion vessel
d Gas valve
e Heat exchanger
f 3-way valve stepper motor
g Safety valve (3bar)
h Condensate trap
i Flue gas temperature sensor
j Burnerhood
k Ignition electrode
l Ionisation electrode
m High limit thermostat
n Fan
o Return temperature sensor
p Silencer
q Automatic air vent (pump)
r Water pressure sensor
s By-pass
t Boiler pump
u Flue gas adapter