Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service
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Connection and Wiring Diagram
Overview
Wiring, Vitotronic 300-K
Legend
A1 PCB, extension for heating circuits 2 and 3 with
mixing valve
A2 PCB low voltage
A3 PCB 120V~
A6 Programming unit
A7 Optolink PCB/emissions test switch
A8 PCB
A10 LON communication module (accessory)
A11 Power supply unit PCB
A12 ON/OFF switch
X Electrical interfaces
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