Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service
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Connection and Wiring Diagram (continued)
Wiring, Vitotronic 100
Main PCB low voltage
Legend
§ Boiler water temperature sensor
%A No Function
%B No Function
) No Function
aG Flue gas temperature sensor
aJA Therm-Control temperature sensor
or
Return temperature sensor T1
aJB Return temperature sensor T2
aVD External hook-up
aVG KM BUS participant
aVH External hook-up
LON Connecting cable for data exchange (accessory)
S3 Emissions test switch “
S
”
V1 Fault indicator (red)
V2 ON indicator (green)
X Electrical interfaces
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