Viadrus NAOS K4, Manual

Page: 36 / 56

Servicing
36
Fig. № . 22 Boiler wiring diagram (low voltage)
b
k
b
la
c
k
b
u
b
lu
e
b
n
b
ro
w
n
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n
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e
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-y
e
llo
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L
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G
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:
A
1
C
O
N
T
R
O
L
B
O
A
R
D
W
IT
H
L
C
D
S
C
R
E
E
N
IO
P
IG
N
IT
IO
N
A
N
D
I
O
N
IZ
A
T
IO
N
E
L
E
C
T
R
O
D
E
M
V
1
F
A
N
Q
1
P
U
M
P
Y
1
0
0
G
A
S
V
A
L
V
E
Y
3
T
H
R
E
E
-W
A
Y
V
A
L
V
E
X
6
0
M
V
1
f
a
n
p
o
w
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r
c
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n
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c
to
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X
6
1
Q
1
p
u
m
p
p
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w
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r
c
o
n
n
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c
to
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X
1
0
1
E
u
ro
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n
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c
to
r
–
t
h
e
b
o
ile
r
p
o
w
e
r
s
u
p
p
ly
X
1
1
0
b
o
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d
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o
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e
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to
r