Installation
1
18
Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 02/2006
Buderus • http://www.buderus-domestic.co.uk
Subject to modifications resulting from technical improvements!
1.10 Wiring Diagram
24 VAC
0 VAC
0
max. 6 VA
hot surface
ignitor
remove bridge when
carrying out connection
Loop is non-conducting
(remove when connecting)
12
M
N
L
12
12
34
12
3
M
N
L
Burner-control unit (UBA)
1
2
3
4
5
6
7
8
9
1
01
11
21
31
41
51
61
71
81
92
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
20-pin connection strip
18-pin connection strip
12
34
56
78
9
1
1
10
I/O
communication port
24V output (AC)
turn-on voltage for external,
customer-supplied three-way
reversing valve (AC operation)
external sensor
Fuse, main switch, emergency OFF switches and
safety measures to comply with local regulations and standards
circulation pump (PH)
(max. 2A)
STB
MV
HT1
HT2
24Vdc
Ventilator
PA
FR
FS
external three-way
reversing valve for
mains water
(AC operation)
FW
FK
flame-monitoring electrode
Note:
KIM
STK
STK
PA
Volt-free connection (bridge connector)
STB Flue
gas
monitor
FW
Domestic hot water temperature sensor
FR Return-temperature
sensor
(return)
FS Safety-temperature
sensor
(safety)
FK
Boiler water-temperature sensor (supply)
KIM Boiler
identification
module
MV Solenoid
valve
STK
Plug socket for additional equipment
HT Hand-held
terminal
1)
Only one room-temperature regulating
device may be connected.
Mains power source
230V
~
50 Hz
Max. permitted
fuse rating
10A
Bridge is conductive
(remove when connecting)
UBA terminal box
1.25 Ampere slow blow
2
1
2
1
1
2
1
2
external
230V controls
Volt free external
control device
*) remove wirebridge
when used
Volt free room
thermostat
when used with
230V timer *)
Connection box
(RTH converter)
1)
IMP
O
RTANT
The
wi
re
s
in
th
is
m
ai
ns l
ead
ar
e
col
ou
red
in a
ccord
an
ce
with the
follo
win
g
co
de
:
GRE
E
N
AND Y
E
LLOW -
E
ARTH
;
B
L
UE -
NE
UTR
A
L ; BROWN - LIV
E
As th
e co
lo
ur
s
of t
he
wi
re
s
in
th
e m
ain
s l
ea
d o
f o
f th
e a
pp
lia
nce
m
ay n
ot
cor
re
spo
nd
w
ith
the
col
ou
re
d m
arki
ngs i
dent
ifyin
g
the
ter
m
ina
ls
in
yo
ur
con
ne
ctor
p
ro
cee
d a
s fo
llo
w
s:
The w
ire
co
lo
ur
ed
gr
ee
n an
d yel
lo
w
m
ust be
co
nn
ecte
d to
th
e te
rm
in
al
o
n the
co
nn
ecto
r
m
ar
ke
d wi
th
the
le
tter
E or
by the
e
ar
th
sym
bo
l
or
co
lo
ur
ed
gr
ee
n or
gr
ee
n-
an
d-
yel
lo
w
. The
w
ire col
our
ed
b
ro
w
n mu
st be
co
nn
ecte
d to th
e ter
m
ina
l m
ar
ked
w
ith
th
e le
tter
L
or
co
lou
re
d r
ed
. Th
e wir
e co
lour
ed
b
lu
e
mu
st b
e co
nn
ecte
d to
th
e t
er
m
in
al m
ar
ke
d with
the
lett
er
N o
r co
lou
re
d b
lack.
W
ARNING
T
H
IS
AP
PL
IA
N
C
E MU
ST
BE
EA
RT
HE
D
Ensure
that your
applia
nce
is
connec
te
d
corr
ectly
-
if y
o
u
are
in a
n
y
doubt cons
u
lt
a qua
lified e
le
c
trici
a
n.
Fo
r loca
ti
on of
indivi
du
a
l c
o
mponents,
see
se
rvi
c
e
se
ction and
th
e
ex
ploded v
iew
s in
th
is
ma
nu
a
l.