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Vitotronic 200 and 300-K Installation and Service
Designs
Connection and Wiring Diagrams
Overview
Legend
A1 Extension PCB heating circuits 2 and 3 (accessory)
A2 Main PCB low voltage
A3 Main PCB 120V~
A6 Programming unit
A7 Optolink PCB/emissions test switch
A8 PCB
A10 LON communication module (accessory)
A11 Power supply unit PCB
A12 Boiler control unit
X... Electrical interfaces
For the Vitotronic 200, refer to the boiler
Service Instructions
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