Control Functions; External Heating Program Changeover - Viessmann VITODENS 222-F Installation And Service Instructions Manual

Function description

Control functions

External heating program changeover

The "External heating program change-
over" function is connected via external
extension input "aVD". You can select
which heating circuits the heating pro-
gram changeover affects in coding
address "91":
Heating program changeover
No changeover
Heating circuit without mixer A1
Heating circuit with mixer M2
Heating circuit without mixer and heating circuit with mixer
You can select in which direction the
heating program changes over in coding
address "D5":
Heating program changeover
Changeover towards "Permanently reduced" or "Permanent
standby" mode (subject to the selected set value)
Changeover towards "Constant heating mode"
The duration of the heating program
changeover can be adjusted in coding
address "F2":
Heating program changeover
No heating program changeover
Duration of the heating program changeover 1 to 12 hours
The heating program changeover stays
enabled for as long as the contact
remains closed, but at least as long as
the duration selected in coding address
"F2".
120
Coding
91:0
91:1
91:2
91:3
Coding
d5:0
d5:1
Coding
F2:0
F2:1 to
F2:12