The external extension is connected
to the boiler control unit via the KM
BUS. The following functions can be
controlled or processed simulta-
neously via the extension:
A
ON/OFF switch (on site)
sK
DHW circulation pump (only for
weather-compensated opera-
tion)
fÖ
Power supply
aVD
&
External blocking
(terminals 2 - 3)
&
External demand
(terminals 1 - 2)
&
External heating program
changeover (terminals 1 - 2)
(only for weather-compen-
sated operation)
The allocation of the function
"External heating program
changeover" is set via coding
address "91".
aVG
KM BUS
Control functions
External heating program changeover
The "External heating program chan-
geover" function is connected via
external extension input "
aVD
". You
can select which heating circuits the
heating program changeover affects
in coding address "91":
Heating program changeover
Coding
No changeover
91:0
Heating circuit without mixer A1
91:1
Heating circuit with mixer M2
91:2
Heating circuit without mixer and heating circuit with mixer 91:3
You can select which direction the
heating program changeover takes in
coding address "d5":
Heating program changeover
Coding
Changeover towards "Permanently reduced" or "Perma-
nent standby" mode (subject to the selected set value)
d5:0
Changeover towards "Constant heating mode"
d5:1
Extensions for external connections . . .
(cont.)
95
Function description
5692
761
GB
Содержание Vitodens 200-W WB2B Series
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