Appendix
40
Installation and maintenance instructions ecoTEC pure 0020258016_01
E
Wiring diagrams
E.1
Product connection diagram with integrated hot water generation
X2
X14
L
N
19
10
20
2
6
3
11
13
14
18
7
17
8
X51
X51
X20
16
1
9
3
15
4
5
10
11
6
13
X51
X20
X40
X51
X30
X2
X21
X41
X22
X14
L
N
– +
24V=
RT
BUS
Burner
off
X1
FUS
X106
X32
X90
X12
X35
X1
L
N
X21
4
1
3
2
eBUS
RT 24V
Burner off
X106
6
5
4
3
2
1
X41
1
3
4
1
3
3
1
2
M
1
3
4
6
1
2
3
M
5
4
2
1
2
1
2
1
2
1
2
1
2
1
N
L
24V
230V~
24V
230V~
2
11
12
13
15
1
7
8
3
4
5
6
9
10
14
17
16
1
Main PCB
2
Interface PCB
3
Safety thermostat for underfloor heating
4
24 V DC room thermostat
5
Bus connection (digital room thermostat/controller)
6
Outside temperature sensor, wired
7
Temperature sensor in the heating return
8
Temperature sensor in the heating flow
9
Fan
10
Gas valve
11
Diverter valve
12
Pressure sensor
13
Mass flow-
14
External ignition device
15
Ionisation and ignition electrode
16
Heating pump
17
Main power supply
