Vaillant ecoTEC plus 620 - Page 100

100 Installation and maintenance instructions 0020308118_05
Validity: VUW 20/26CS/1-5 (N-GB) ecoTEC plus 826 OR VUW 25/32CS/1-5 (N-GB) ecoTEC plus 832 OR VUW 30/36CS/1-5 (N-GB) ecoTEC plus 836
X51
X40 X51 X35
X31
X32
X90
U2
X12a X12b
X1
CH Pump
RT 230V Mains
X19
X25
X21
X23
21
X41X36
X2
X100
Opt 1
X16
Fan
X11
X24
X20
X26
X20
X2
X100
X23
X25
X26
X36
X16
X11
X1X12a
X51
X24
X41
X19
24V
230V~
NL NL
NL
NL
N
L
N
L
3
2
1
1
2
3
4
5
6
6
1
4
3
2
5
3
2
1
4
6
5
4
3
2
1
6
5
4
3
2
1
1
2
4
1
a
b
2
3
1
4
3
5
2
1
3
3
1
4
6
M
3
1
4
2
3
6
1
5
13
11
14
8
17
7
18
9
1
BUS
-
+
24V=
RT
Burner
Off
3
1
5
4
2
3
1
GND
PWM
RPM
+24V
18
12
10
4
2
8
7
6
17
13
3
15
14
6
5
4
3
2
1
12
11
3
7
9
8
1
2
RT
3
4
6
5
7
8
9
10
11
12
13
14
15
16
17
23
2
1
22
18
19
21
20
1 Printed circuit board
2 Control panel PCB
3 Gas valve assembly
4 Fan
5 Gas valve assembly for main gas valve
6 Return temperature sensor