Technical data

73
Installation – Vitocontrol-S, VD2/CT3/CM2
Summary of electrical connections
Mixing valve extension circuit board
?M2/M3 Supply temperature sensor
sÖM2/M3 Heating circuit pump
gSM2/M3 Mixing valve actuator
Low voltage motherboard
! Outdoor temperature sensor
? Common supply temperature
sensor
% DHW tank temperature sensor
aJA Temperature sensor T1
(accessory)
aJB Temperature sensor T2
aVD Connection
aVG KM BUS
aVH Connection for external
equipment
LON LON BUS, interconnecting cable
for data transfer between the
control units
Line voltage motherboard
sÖA1 Heating circuit pump
sA DHW pump
sK DHW re-circulation pump
sL Shunt pump
or
Boiler circuit pump
fÖ Power supply connection
gÖ Compiled failure alarm
gSA1 Three-way return valve
aBH Internal power supply for mixing
valve extension circuit board and
connections for accessories
5351 340 v1.4
52
52
20
20
2
2
M3
M2
M3
M2
M3
M2
145
145
1
17
17
5
2/3
143
146
B
A
LON
28
21
52
20
29
50
40
156
A1
A1