Viessmann VITODENS 200-W Service Instructions Manual page 52

Codes
Code 2
(cont.)
Parameter With heating circuit pump logic function: Heating circuit
address b5:... pump OFF, if
1: enabled RT
2: enabled RT
3: enabled RT
4: enabled RT
5: enabled RT
6: enabled RT
7: enabled RT
8: enabled RT
Coding in the delivered condition
Boiler circuit, mixer circuit
C5:20 Electronic minimum flow
temperature limit 20 °C
(only for weather-com-
pensated control units)
C6:74 Electronic maximum flow
temperature limit 74 °C
(only for weather-com-
pensated control units)
d3:14 Heating curve slope = 1.4
(only for weather-com-
pensated control units)
d4:0 Heating curve level = 0
(only for weather-com-
pensated control units)
d5:0 The external heating pro-
gram changeover
changes the heating pro-
gram to "Constant opera-
tion with reduced room
temperature" (only for
weather-compensated
control units)
52
> RT + 5 K; disabled RT
actual set
> RT + 4 K; disabled RT
actual set
> RT + 3 K; disabled RT
actual set
> RT + 2 K; disabled RT
actual set
> RT + 1 K; disabled RT
actual set
> RT ; disabled RT
actual set
> RT - 1 K; disabled RT
actual set
> RT - 2 K; disabled RT
actual set
Possible change
C5:1
to
C5:127
C6:10
to
C6:127
d3:2
to
d3:35
d4:–13
to
d4:40
d5:1
< RT + 4 K
actual set
< RT + 3 K
actual set
< RT + 2 K
actual set
< RT + 1 K
actual set
< RT
actual set
< RT - 1 K
actual set
< RT - 2 K
actual set
< RT - 3 K
actual set
Minimum temperature limit
adjustable from 1 to
127 °C (limited by boiler-
specific parameters)
Maximum temperature
limit adjustable from 10 to
127 °C (limited by boiler-
specific parameters)
Heating curve slope adjust-
able from 0.2 to 3.5 (see
page 29)
Heating curve level adjust-
able from –13 to 40 (see
page 29)
The external heating pro-
gram changeover changes
the heating program to
"Constant central heating
with standard room tem-
perature"