External Blocking; External Demand - Viessmann Vitodens 200-W Series Installation And Service Instructions Manual

Control functions
(cont.)
Heating program - changeover
Changeover via input DE1
Changeover via input DE2
Changeover via input DE3
You can select which direction the heating program
changeover takes in coding address "d5" in the "Heat-
ing circuit" group:
Heating program - changeover
Changeover towards "Permanently reduced" or "Permanent standby" mode (sub-
ject to the selected set value)
Changeover towards "Constant heating mode"
The duration of the heating program changeover is set
via coding address "F2" in the "Heating circuit"
group:
Heating program - changeover
No operating program changeover
Duration of the operating program changeover 1 to 12 hours
The operating 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".

External blocking

The "External blocking" and "External blocking and
fault message input" functions are connected via
extension EA1. There are 3 inputs available at exten-
sion EA1 (DE1 to DE3).
External blocking
Input DE1
Input DE2
Input DE3
External blocking and fault message input
Input DE1
Input DE2
Input DE3
The effect on the internal circulation pump is selected
in coding address "3E" in the "General" group.

External demand

The "External demand" function is connected via
extension EA1. There are 3 inputs available at exten-
sion EA1 (DE1 to DE3).
The function is selected via the following coding
addresses in the "General" group:
The effect on the respective heating circuit pump is
selected in coding address "d6" in the "Heating cir-
cuit" group.
The function is selected via the following coding
addresses in the "General" group:
Function description
Code
d8:1
d8:2
d8:3
Code
d5:0
d5:1
Code
F2:0
F2:1 to
F2:12
Code
3A:3
3b:3
3C:3
Code
3A:4
3b:4
3C:4
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