Vaillant VWL 127/5 IS User Manual

Appendix
44 Installation and maintenance instructions Hydraulic station 0020257319_02
B Control PCB
X11
S20
S21
BUS
5
6
3
4
1
2
L
N
X21
X22
1
7
8
2
918
17
16
15
14
13
12
11
10
3
4
5
6
X28
1
2
7
8
9
11
10
12
3
4
5
6
1
7
8
2
919
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
˽
˽
2
1
eBUS
+
-
M
˽
3
6 5 4 3 2 1
˽
˽
p
˽
˽
12
1
2
3
4
5
6
X29
1
2
X100 /
X106
3
X41
DCF
0
0
FB
AF
RF
11
10
9
8
7
1
12
13
15
14
21
19
18
17
4
5
6
2
20
22
23
24
25
16
1 Control PCB
2 [X51] Display edge connector
3 [X29] eBUS bus connection for the installed system
control
4 [X24] Coding resistor 3
5 [X24] Coding resistor 2
6 [X41] Edge connector (outdoor temperature sensor,
DCF, system temperature sensor, multi-function
input)
7 [X106/S20] Limit thermostat
8 [X106/S21] ESCO contact
9 [X106/BUS] eBUS bus connection (outdoor unit,
VRC 700, VR 70 / VR 71 )
10 [X16] Internal heating pump
11 [X15] Internal prioritising diverter valve for heating
circuit/cylinder charging
12 [X11] Multi-function output 2: Domestic hot water
circulation pump
13 [X13] Multi-function output 1
14 [X14] Multi-function output: External back-up
heater/external prioritising diverter valve
15 [X1] 230 V supply for control PCB
16 Earth wire for the power supply PCB
17 [X28] Data connection to the power supply PCB
18 [X22] Immersion heater flow temperature sensor
19 [X22] Heating pump signal
20 [X22] Pressure sensor
21 [X22] Building circuit flow temperature sensor
22 [X22] Building circuit return temperature sensor
23 [X22] Domestic hot water cylinder temperature
sensor
24 [X21] Condenser outlet temperature sensor (EEV
outlet)
25 [X21] Condenser inlet temperature sensor

Vaillant VWL 127/5 IS Specifications

General

Brand	Vaillant
Model	VWL 127/5 IS
Category	Heat Pump
Language	English