Installation
1
Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 28C • 01/2004
17
Subject to modifications resulting from technical improvements!
Boulter Buderus Ltd. • http://www.boulter-boilers.com
1.10 Wiring Diagram
38
39
70
62
55
61
11
12
63
64
2
1
2
3
Mains s
w
itch
BC 10
connector
1
2
3
4
Pressure
sensor
3WV
1
2
3
2
1
3
1
2
3
Pump
PE
L
N
M
1
2
3
P
6
7
5
4
1
2
3
1
2
3
5
6
T
ransf
or
mator
L
N
PE
Hot
surf
ace
ignitor
L
N
5
M
Fa
n
Gas
120
VA
C
Ionisation
Safety sensor
Boiler sensor
Return sensor
Mains po
w
e
r source
230 V
A
C
50
Hz
Exter
nal
temper
ature sensor
Ear
th
1
4
5
53
79
23
67
68
76
12
13
14
45
17
49
11
10
28
1
81
27
52
25
3
4
7
80
9
44
16
1
2
6
7
8
5
1
2
3
4
L
N
120 VA
C
4
3
2
1
63
64
36
37
26
77
58
23
79
53
33
60
35
8
43
34
8
15
16
1
57
75
74
Exter
n
al s
w
itch contact
fo
r underfloor heating
system
13
14
Supply sensor
9
10
Hot water sensor
81 pin Lo
w
V
o
ltage
Pin 1
28
55
Pin 81
Pin 16
Pin 1
16 pin High v
oltage
Connection bo
x UBA 3
KIM
16 pin High v
oltage
81 pin Lo
w v
oltage
120 VA
C
Earth
120 VA
C
230 VA
C
120 VA
C
230 VA
C
230 VA
C
24 VA
C
0 VA
C
24 VA
C
24 VRAC
230 VA
C
switch contact
24 VA
C
10 VA
C
10 VA
C
230 VA
C
0 VA
C
50
78
Flue gas monitor
ModuLine roomtemp
.
controller
Supply/
Saf
ety sensor
3
4
5
6
7
8
9
10
11
12
13
green
or
ange red blue g
re
y light b
lue
1 - 2 1 - 2 1 - 2 1 - 2 1 - 2 1 - 2 - 3
24V
ac
0V
ac
1
2
Connection made by
a Corgi registered installer
13
12
11
10
9
8
7
6
5
4
3
2
1
RCC
1
2
N
L
PE
N
L
PE
230V
a
c
32
1
3
2
1
23
4
1
loop
24V
a
c
ON/OFF
room ther
mostat
potential free
230V
ac ON/OFF
room ther
mostat
23
4
1
RT
H
IMPORTANT
The
wi
re
s
in
th
is
m
a
in
s l
e
ad
ar
e
col
o
u
red
in a
ccord
a
n
ce
with the
follo
win
g
co
de
:
GREEN AND YELLOW -
EARTH
;
B
L
UE -
NEUTR
A
L ; BROWN - LIVE
As th
e co
lo
u
rs
of t
he
wi
re
s
in
th
e m
a
in
s l
e
a
d
o
f o
f th
e a
p
p
lia
nce
m
a
y n
o
t
cor
re
s
po
nd
w
it
h
t
he
col
o
u
re
d
m
a
rki
n
gs i
d
ent
if
yin
g
the
ter
m
ina
ls
in
yo
ur
pl
u
g
p
ro
c
ee
d a
s
fo
llo
w
s:
The
wi
re
col
o
u
re
d
gr
ee
n a
nd
yel
lo
w
m
u
st
be
con
n
e
c
ted
to
the
te
rm
ina
l on
th
e p
lu
g
ma
rke
d
w
ith
th
e le
tter E
or b
y
th
e e
a
rth
symb
o
l
o
r c
o
lo
ur
ed
gr
ee
n o
r gr
ee
n-
an
d-
ye
llo
w.
The
wire
c
o
lo
u
red
br
own
mu
s
t b
e
c
o
nn
ec
te
d t
o
t
h
e t
e
rm
in
al ma
rk
e
d
wit
h
the
l
e
tt
er
L
or
col
o
ur
ed
r
ed.
The
w
ir
e
col
o
ur
ed
bl
ue
m
u
st
be
con
nect
e
d
to
the
te
rm
in
a
l ma
rk
ed
w
it
h
th
e l
e
tte
r
N
or
col
o
ur
ed
bl
a
ck.
W
ARNING
T
H
IS
AP
PL
IA
N
C
E MU
ST
BE
EA
RT
HE
D
Ensure that your
applianc
e is
connect
ed corr
ectly - if yo
u
are in
an
y doubt consu
lt
a
qualified electrici
a
n.
Fo
r locat
ion of
indivi
du
al compone
nts, see
servi
c
e
section and
th
e exploded
view
s in
th
is manu
al.