Main Pcb Low Voltage - Viessmann VITOTRONIC 100 GC1B Installation And Service Instructions Manual

Designs
Connection and Wiring Diagram

Main PCB Low Voltage

Legend
Boiler water temperature sensor
§
%A DHW tank temperature sensor
%B DHW tank temperature sensor 2 for primary store
system (optional accessory)
Supply temperature sensor
)
Flue gas temperature sensor
aG
aJA Therm-Control temperature sensor
or
Return temperature sensor T1
aJB Return temperature sensor T2
or
Temperature sensor primary store system
(optional accessory)
114
Vitotronic 100, GC1B Installation and Service
(continued)
avD External hook-up
avG KM BUS participant
avH External hook-up
LON Cable for data exchange between control units
(accessories)
S3 Emissions test switch
V1 Fault indicator (red)
V2 ON indicator (green)
X Electrical interfaces