Connection And Wiring Diagram, Type Gw2B - Viessmann VITOTRONIC300 Installation And Service Instructions Manual

Designs

Connection and Wiring Diagram, Type GW2B

Overview
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
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Vitotronic 300, GW2B Installation and Service
A8 PCB
A9 Boiler Coding card
A10 LON communication module (accessory)
A11 Power supply unit PCB
A12 Programming unit ON/OFF switch
X Electrical interfaces