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Appendix
E
Wiring diagrams
E.1
Product connection diagram with integrated hot water generation
2
1
X40
X51
X32
X90
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
40
X51
X51
X51
X35
–
+
Burner
24V=
off
RT
BUS
X2
X20
X30
X21
L
N
X12
Burner off
RT 24V
X106
eBUS
1
2
3
X41
4
5
6
13
6
5
10
X20
11
4
15
3
16
1
9
8
17
7
18
14
11
13
X2
3
6
2
20
10
19
14
1
4
X21
3
2
L
X14
N
X1
N
N
L
L
17
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
Installation and maintenance instructions ecoTEC pure 0020258016_01
3
1
2
4
1
2
1
5
2
6
1
7
2
1
8
2
9
1
M
2
4
5
10
3
1
11
6
M
4
3
1
12
1
4
3
1
13
3
2
3
2
1
15
24V
230V~
16
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