Connection Diagrams - Vaillant ecoTEC VU 656/4 Installation And Maintenance Instructions Manual

5.8.5 Connection diagrams

brown
14
black
black
10
orange
4
violet
2
5
black
9
red
11
green
12
red
X2
green
13
black
1
blue
17
black
3
grey
4
red
16
red
5
black
7
blue
8
black
12
black
13
black
14
X20
black
6
black
10
blue
18
red
9
15
2
Igniter
X14
Fig. 5.16 Connection diagram of ecoTEC
(continued on next page)
1) You must not use both the C1/C2 and the cylinder sensor connections!
Installation and maintenance instructions ecoTEC 0020029173_01
Coding resistance
1210 Ω
green/yellow
Cylinder thermostat (connection)
"C1-C2"
1
P
2 Water pressure sensor
4
+
Signal
Flow rate sensor
-
1 Earth
2
Hall signal
3
4 PWM signal
5 +24V
natural
black
Flow switch
Installation 5
Cylinder
1)
NTC sensor
Fan
Flow sensor
Return sensor
Gas valve
Ignition electrode
Appliance earth
X11
1)
23