When
0
hot water top is opened o
r
the cen
t
ral heating system
r
equ
i
res hea
t,
the boiler
automatically
ignite
s
and starts to operate
.
If no automatic
ignition occurs within
0
set
p
e
riod o
f
ab
o
ut 10 second
s
, the boiler will not
s
tart and the burner lo
c
k out indicator
w
il
l i
lluminat
e
(s
ee Indi
c
ato
r
Light
s)
.
A fur
t
her ignition attem
p
t con only
t
a
k
e place
on
ce
th
e
cent
r
al
he
ating con
t
ro
l
C
D
ha
s
b
ee
n turn
e
d b
r
ie
f
ly to the r
es
et po
s
i
t
io
n
Q
and re
le
a
s
ed
.
If
,
after att
e
mpt
i
ng
to
l
ight
t
he boiler by turning to the res
et
posit
i
on
,
th
e
boil
e
r shuts down again
,
con
s
ult your service agent or Vaillant Service
.
Note
:
P
a
rticular
l
y when starti
n
g up
f
or t
h
e first t
i
me
,
or
a
f
t
er the boile
r
h
a
s
been out
o
f o
p
er
at
io
n f
or
0
f
a
ir
ly
lo
n
g period
,
i
t
may be necessary to turn th
e
cen
t
ra
l
heating contro
l
to the
r
ese
t
posit
i
on s
e
vera
l
time
s
before
ign
i
t
i
on ta
k
es place
.
rf
\:\
'I
W
l
'
i
r
~
~---
-
--
------
-
--
-
"
,
~
Cl
