Appendix
0020214491_01 ecoTEC plus Installation and maintenance instructions
37
E
Connection diagram
Ignition electrode
Appliance earth
Ignition unit
X14
green/yellow
Cylinder thermostat (accessory)
"C1/C2"
Gas valve
Flow Switch
Flow sensor
Flow sensor
Water pressure sensor
Cylinder sensor
P
Return sensor
Fan
Mains
X20
X2
Extr
a-lo
w v
o
lt
age plug
natural
1
2
4
+
signal
-
1 Earth
2 Hall signal
3
4 PWM signal
5 + 24 V
black
4
2
5
9
11
12
13
1
17
3
4
16
5
7
8
12
13
14
6
10
18
9
15
2
14
10
brown
black
black
black
black
black
black
black
black
black
black
black
grey
red
red
red
blue
blue
blue
green
red
red
green
orange
violet
Coding resistance
1210
X11