Electrical installation 8
0020196687_03 flexoTHERM exclusive Installation and maintenance instructions
25
8.6
Control PCB
X23
X40
X30
X25
X31
X24
X41
X26
X100/S20
X100/S21
X100/BUS
X14
X15
X13
X16
X11
X12
X22
X21
X90
X1
F1
X20
X51
1
2
3
4
5
6
7
8
9
24
23
22
11
10
14
15
16
17
18
19
20
21
13
12
1
[X23] EEV connection (electrical expansion valve)
2
[X40] VR40 edge connector (electrical lines)
3
[X51] Edge connector for display connection
4
[X30] eBUS connection/diagnostics interface
5
[X25] Modbus plug for controlling the in-rush current
limiter
6
[X31] (not used)
7
[X24] (not used)
8
[X41] Edge connector for external sensors (outdoor
temperature sensor, DCF, system sensor, multi-
function input (can be adjusted in the system con-
trol))
9
[X26] Sensor cable harness, 230 V, L N PE
10
[X100/S20] Limit thermostat
11
[X100/S21] ESC contact
12
[X100/BUS] Bus connection (
VR 900
)
13
[X20] Data connection to power supply PCB and
power supply for the in-rush current limiter
14
[X14] Circulation pump connection
15
[X15] Connection for internal 3-port valve for do-
mestic hot water (DHW)
16
[X13] Internal brine pump connection
17
[X16] Internal heating pump connection
18
[X11] Connection for internal 4-port valve
19
[X1] 230 V supply for control PCB
20
[F1] F1 T 4A/250 V fuse
21
[X12] Edge connector for 230 V supply for optional
VR 40
22
[X22] Connection for sensor cable harness (includ-
ing connection for internal VR 10 cylinder temperat-
ure sensor and EVI valve)
23
[X21] Connection for sensor cable harness
24
[X90] (not used)