Appendix
0020291544_01 Hydraulic Station Installation and maintenance instructions
43
C
Control PCB
X11
X100 /
X106
S20
S21
BUS
5
6
3
4
1
2
L
N
X21
X22
1
7
8
2
9 18
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
9 19
20
18
17
16
15
14
13
12
11
10
3
4
5
6
X16
X41
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
˽
eBUS
+
-
M
3
6
5
4
3
2
1
p
˽
12
1
2
3
4
5
6
2
1
X51
X29
1
2
DCF
0
0
FB
AF
RF
2
1
4
3
2
1
2
1
X35
12
10
9
8
13
14
16
15
19
18
6
7
20
21
11
17
1
2
5
3
4
1
Control PCB
2
[X29] eBUS bus connection for the installed system
control
3
[X51] Display edge connector
4
[X35] Edge connector for optional external current
anode
5
[X24] Coding resistor 3
6
[X24] Coding resistor 2
7
[X41] Edge connector (outdoor temperature sensor,
DCF, system temperature sensor, multi-function
input)
8
[X106/S20] Limit thermostat
9
[X106/S21] ESCO contact
10
[X106/BUS] eBUS bus connection (outdoor unit,
VRC 700
,
VR 70
/
VR 71
)
11
[X16] Optional: Accessory (intermediate heat ex-
changer pump)
12
[X15] Internal prioritising diverter valve for heating
circuit/cylinder charging
13
[X11] Multi-function output 2: Domestic hot water
circulation pump
14
[X13] Multi-function output 1
15
[X14] Multi-function output: External back-up heat-
er/external prioritising diverter valve
16
[X1] 230 V supply for control PCB
17
[X1] Functional earth
18
[X28] Data connection to the power supply PCB
19
[X22] Immersion heater flow temperature sensor
20
[X22] Optional: Accessory (building circuit pressure
sensor for optional intermediate heat exchanger)
21
[X22] Domestic hot water cylinder temperature
sensor
