3 About the unit
Installation manual
7
D035A1/4AA + D035A4AA
Wall-mounted condensing boiler
3P469346-5E – 2017.06
3.3
Components
Components of models D2CND028A1AA, D2CND028A4AA,
D2CND035A1AA and D2CND035A4AA
a
b
c
d
e
f
g
h
k
l
m
n
r
ab
s
t
u
v
w
i
j
o
p
q
x
z
y
ac
aa
a
Automatic air vent (heat exchanger)
b
Flow temperature sensor
c
Expansion vessel (10 litres)
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 (3 bar)
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 D2CND0
D2CND035A1AA and not included in model
D2CND0 D2CND035A4AA)
aa
Flue gas adapter
ab
Condensate sump
ac
Flue gas pipe
Components of models D2TND028A4AA and D2TND035A4AA
a
b
c
d
e
w
f
i
j
k
o
v
p
q
r
s
t
g
h
l
m
n
u
a
Automatic air vent (heat exchanger)
b
Flow temperature sensor
c
Expansion vessel (10 litres)
d
Gas valve
e
Heat exchanger
f
3-way valve stepper motor
g
Safety valve (3 bar)
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
v
Condensate sump
w
Flue gas pipe