Mixing Valve Extension Pcb; Required Code - Viessmann VITOTRONIC300 Installation And Service Instructions Manual

Preparing for Installation
System Example 1

Mixing valve extension PCB

Required code

4C:2 "General" group
0d:1 "Boiler" group
12
(continued)
Use of plug sÖ A1 to close the downstream mixing valves.
Temperature sensor Therm-Control affects the mixing valves of
downstream heating circuits (factory set condition).
Vitotronic 300, GW2B Installation and Service
Wiring diagram
Closing mixing valves installed downstream via
temperature sensor T1 in heating systems with heating
circuit control units that are not connected to the boiler
control unit via LON.