External "Mixing Valve Closed"/"Mixing Valve Open - Viessmann vitotronic 200-h Installation And Service Instructions Manual

Vitotronic 200-H, HK1B Installation and Service

External "Mixing Valve Closed"/"Mixing Valve Open"

Legend
A External "Mixing valve open" (floating contact)
B External "Mixing valve closed" (floating contact)
Codes
External "Mixing valve open"
This function is assigned to the heating circuits via
coding address "9A" in the "General" group.
Connection at plug aVD.
Note: 'Live' contacts lead to short circuits or phase failure.
The external connection must be floating.
External "Mixing valve closed"
This function is assigned to the heating circuits via
coding address "99" in the "General" group.
Installation Sequence
21