0020193968_05 ecoTEC exclusive Installation and maintenance instructions
61
H.2
Wiring diagram
≥
37 kW
X18
X51
X20
X1
X13
24V
230V~
24V
230V~
X41
X25
6
5
4
3
2
1
X21
6
5
4
3
16
1
12
4
X2
13
11
14
3
1
4
10
15
13
2
1
3
6
3
2
3
2
4
1
2
3
L
N
L
N
X16
L
N
1
2
3
1
2
3
19
1
20
8
17
7
18
6
4
3
1
M
16
4
3
17
5
7
8
5
4
2
1
Masse
PWM
Hallsignal
+24V
15
2
Burner Of
f
B
US
R
T
24V
X100
4
2
10
11
2
3
1
5
8
1
6
8
3
5
1
2
4
1
2
3
5
6
7
8
X30
X40 X51
X35
X31
X22
X90
2
1
T2
Fuse
X12
X25
X21
X2
X24
X20
X1
Opt
X16
Fa
n
X11
TL Pump
X13
X18
CH P
ump
–
+
24V=
RT
B
U
S
Burner
of
f
X100
X41
5
X51
X11
L
N
1
2
3
13
12
L
RT
N
*
2
1
10
23
23
22
21
10
4
3
17
14
15
13
12
11
8
16
6
9
24
19
18
7
20
X24
17
3
1
Main PCB
2
Operator control panel PCB
3
All-gas sensor
4
Gas valve assembly
