Connection Diagrams - Vaillant ecoTEC plus SERIES Installation And Maintenance Instructions Manual

8 Electrical installation
8.7

Connection diagrams

X51
Display
Connection
24 V
230 V~
Ignition
unit
8.3 Connection diagram for electronics box ecoTEC plus 612,
615, 618, 624, 630
32
X22
8
7
2
1
5
3
X25
11
10
white
4
9
6
12
8
17
7
18
14
13
11
X2
blue
4
12
1
16
5
7
8
7
12
X20
13
pink 2
15
16
4
3
17
X24
3
17
white
6
Circulation pump remote control
FB
External sensor
X41 AF
External temperature sensor
RF
Edge
DCF connection
DCF
connector
Earth
0
1
Earth
0
Contact thermostat/burner off
blue
X100
24 V DC room thermostat
white
Bus connection
-
pink
(Controller/room th. digital)
+
L
Auxiliary relay *
X16
N
(Selection by D.026)
grey
L
N
X18
green
No function *
230 V AC room thermostat *
RT
L
X1 Mains connection
N
turquoise
+
+
1
2
3
4
5
6
-
+
1
2
M
3
4
5
6
1
3
4
Cylinder sensor (optional)
white

Cylinder contact "C1-C2"
white
red

blue

Safety fuse
Coding resistor, output range
Coding resistor, gas group
Internal pump *
Appliance earth
Installation and maintenance instructions ecoTEC plus 0020116700_01
Pump PWM signal
Gas valve
Holding magnet
Stepper motor
Mass flow
sensor
Diverter
valve *
Water pressure
sensor
Flow sensor
Return sensor
1 2 4 5
Fan
Ignition
electrode
* ... variant-dependent