Viessmann Vitodens 222-F B2TA Installation And Service Instructions Manual page 104

Code 2
"Heating circuit ..."/group 5
Coding in the delivered condition
A8:1 Heating circuit with mixer
creates a demand for the
internal circulation pump
(only for weather-com-
pensated control units)
A9:7 With pump idle time:
Heating circuit pump
"OFF" if the set value is
altered through a change
in operating mode or
through a change in the
set room temperature
(only for weather-com-
pensated control units)
b0:0 Only for heating circuit
with mixer and remote
control:
Heating mode/reduced
mode: Weather-compen-
sated (only for weather-
compensated control
units)
b2:8 Only for heating circuit
with mixer and remote
control, and for the heat-
ing circuit, operation with
room temperature hook-
up must be program-
med:
Room influence factor 8
(only for weather-com-
pensated control units)
b5:0 Only for heating circuit
with mixer and remote
control:
104
(cont.)
Possible change
A8:0
A9:0
A9:1
to
A9:15
b0:1
b0:2
b0:3
b2:0
b2:1
to
b2:64
b5:1
to
b5:8
Heating circuit with mixer
creates no demand for the
internal circulation pump
Without pump idle time
With pump idle time, ad-
justable from 1 to 15.
1 = short idle period
15 = long idle time
Heating mode: weather-
compensated.
Reduced mode: With room
temperature hook-up
Heating mode: With room
temperature hook-up
Reduced mode: Weather-
compensated
Heating mode/reduced
mode: With room tempera-
ture hook-up
Without room influence
Room influence factor ad-
justable from 1 to 64. The
higher the value, the great-
er the room influence
Heating circuit pump logic
function, see the following
table