Overview Of Electrical Connections - Viessmann VITOTRONIC 100 GC1 Installation And Service Instructions Manual

Installation

Overview of Electrical Connections

145
17 B
17 A
5
3/2
15
143
146
Low voltage connections (motherboard)
§
Boiler temperature sensor (KTS)
%
DHW tank temperature sensor
aG
Flue gas temperature sensor
aJA Return temperature sensor T1
aJB Return temperature sensor T2
aVD
Connection of external
equipment
aVG
KM BUS participant
aVH
Connection of external
equipment
42
21
A1/M1
52
20 A1/M1
29
50
40
156
156
Line voltage connections (motherboard)
sÖ A1Control output
sA
DHW pump
sL
Shunt pump or
boiler circuit pump
fÖ
Power supply connection
fA
Burner (1st stage)
gÖ
Compiled failure alarm
gS A1Return valve
or
Isolation/modulating valve
lÖ
Burner (2nd stage/modulating)
aBÖ
Connection of external
equipment, e.g. additional
safety equipment
aBA
Safety circuit, potential free
aBH
Power supply connection for
accessories
150
151
90
41