Viessmann VITODENS 200-W WB2B Service Instructions For Contractors page 49

Code 2
(cont.)
Coding in the delivered condition
85:0 Standard mode
88:0 Temperature displayed
in °C (Celsius)
8A:175 Never adjust
90:128 Time constant for calcu-
lating the adjusted out-
side temperature
21.3 hours
91:0 No external heating pro-
gram changeover via
external extension (only
for weather-compen-
sated control units)
Possible change
85:1 Manual calibration of the
combustion controller
(only adjustable if coding
address 11:9 has been
set).
The red fault indicator
also flashes during cali-
bration. The process has
terminated when the red
fault indicator no longer
flashes (after approx.
1 min).
Note
Heat must be drawn off
during manual calibra-
tion.
88:1 Temperature displayed in
°F (Fahrenheit)
90:0 Fast (low values) or slow
to (high values) matching of
90:199 the flow temperature,
subject to the set value
when the outside tem-
perature changes;
1 step = 10 min.
91:1 The external heating pro-
gram changeover affects
the heating circuit without
mixer
91:2 The external heating pro-
gram changeover affects
the heating circuit with
mixer
91:3 The external heating pro-
gram changeover affects
the heating circuit without
mixer and the heating cir-
cuit with mixer
Coding
49