Vaillant aroTHERM Series, Operating Instructions Manual

Page: 79 / 212

Appendix
0020257297_02 aroTHERM Installation and maintenance instructions
77
C.3 Wiring diagram, part 2
X11
X100 / X106
X27
X25
S20
S21
BUS
5
6
3
4
1
2
L
N
M
p
X21
X23
X22
1
7
8
2
9 18
17
16
15
14
13
12
11
10
3
4
5
6
1
2
6
7
8
9
10
3
4
5
1 2
X28
1
2
7
8
9
11
10
12
3
4
5
6
1
7
8
2
9 19
20
18
17
16
15
14
13
12
11
10
3
4
5
6
X16
3
1
2
L
N
X13
L
N
X15
3
4
1
2
S
L
N
X14
S
L
N
X1
L
N
X24
6
4
3
2
1
5
7
8
9
12
11
10
13
14
15
16
3
1
2
3
1
2
3
4
1
2
3
4
1
2
p
˽
˽
˽
M
˽
3 1
4 2
2
3
4
15
16
14
13
1
5
6
7
12
11
10
9
8
17
18
1 HMU PCB
2 Actuation for fan 2 (only for product VWL 105/5 and
VWL 125/5)
3 Connection to the INSTALLER BOARD PCB
4 Crankcase heating
5 4-port diverter valve
6 Condensate tray heating
7 Connection to the INSTALLER BOARD PCB
8 Temperature sensor, at the air inlet
9 Actuation for fan 1
10 Temperature sensor, behind the compressor
11 Temperature sensor, in front of the compressor
12 Pressure monitor
13 Temperature monitor
14 Pressure sensor
15 Electronic expansion valve
16 Actuation for INVERTER assembly
17 Slot for coding resistor for cooling mode
18 Range for the safety extra-low voltage (SELV)