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Vitodens 200-W B2HA 112, 150 Service
87
5683 710 - 09
Function Description
Control Functions
The “External heating program changeover” function is
connected via extension EA1. There are 3 inputs available
at extension EA1 (DE1 to DE3).
The function is selected via the following codes:
Assign the heating program changeover function for
the respective heating circuit with code D8 at the boiler
control unit:
External heating program changeover
The “External heating program changeover” function is
connected via input “EA1” in the EACB.
You can select which direction the heating program
changeover takes in coding address “D5”:
Heating program changeover
Coding
Changeover towards “Permanently reduced”
or
“Permanent standby” mode (based on the
selected setpoint)
D5:0
Changeover towards “Constant heating mode” D5:1
Heating program changeover
Coding
No changeover
F2:0
Duration of the heating program changeover
1 to 12 hours
F2:1 to
F2:12
The duration of the heating program changeover can be
adjusted in coding address “F2”:
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”.
Heating program changeover
Coding
Changeover via input DE1
D8:1
Changeover via input DE2
D8:2
Changeover via input DE3
D8:3
Heating program changeover
Coding
Input DE1
3A:1
Input DE2
3B:1
Input DE3
3C:1
External blocking
The “External blocking” and “External blocking and fault
message input” functions are connected via extension
EA1. There are 3 inputs available at extension EA1
(DE1 to DE3).
The function is selected via the following codes:
The effect on the internal circulation pump is selected
with code 3E. Select the effect on the respective heating
circuit pump with code D6.
External demand
The “External demand” function is connected via
extension EA1. There are 3 inputs available at extension
EA1 (DE1 to DE3).
The function is selected via the following codes:
The effect on the internal circulation pump is selected
with code 3F. The effect on the respective heating circuit
pump is selected with code D7.
The minimum set boiler water temperature in case of
external demand is selected in coding address “9B”.
External blocking
Coding
Input DE1
3A:3
Input DE2
3B:3
Input DE3
3C:3
External blocking and fault message input
Coding
Input DE1
3A:4
Input DE2
3B:4
Input DE3
3C:4
External demand
Coding
Input DE1
3A:2
Input DE2
3B:2
Input DE3
3C:2
You can select which direction the heating program
changeover takes in coding address “D5”.