C Control Pcb - Vaillant uniTOWER plus Operating Instructions Manual

C Control PCB
21
20
p
19
18
1 Control PCB
2 [X29] eBUS bus connection for the installed system
control
3 [X51] Display edge connector
4 [X35] External current anode edge connector
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)
0020291525_04 Installation and maintenance instructions
1 2 3
6 5 4
X51
X21
9 18
8 17
7 16
6 15
5 14
4 13
3 12
2 11
1 10
1
2
X22
10 20
9 19
8 18
7 17
6 16
5 15
4 14
3 13
2 12
1 11
X28
6 12
5 11
12
4 10
3 9
2 8
1 7
1
2
4
3 2 1 4 3 2 1
X35
X24
9 1
10 2
11 3
12 4
13 5
FB
14 6
AF
15 7
RF
16 8
DCF
0
X41
0
S20
X100 /
X106
S21
1
BUS
2
X29
L
N
X16
L
S
N
X15
L
N
X11
L
N
X13
L
S
N
X14
L
N
X1
12 [X15] Internal prioritising diverter valve for heating
circuit/cylinder charging
13 [X11] Multi-function output 2: Domestic hot water
circulation pump, anti-legionella pump, dehumidifier,
zone valve
14 [X13] Multi-function output 1: Cooling valve, zone
valve
15 [X14] Multi-function output: External back-up heater,
external prioritising diverter valve, external fault
message
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
5
6
6
5
4
7
3
2
1
6
5
4
3
1
2 -
eBUS
1 2 +
3
2
1
4
M
3
2
1
3
13
2
1
3
14
2
1
4
3
15
2
1
4
3
16
3
2
17
1
8
9
10
11
12
47