Viessmann Vitodens 333 Service Instructions Manual page 55

Code 2
(cont.)
Parameter ad- With heating circuit pump logic function:
dress b5:... Heating circuit pump "OFF"
1 RT
Actual
2 RT
Actual
3 RT
Actual
4 RT
Actual
5 RT
Actual
6 RT
Actual
7 RT
Actual
8 RT
Actual
Coding in the delivered condition
Heating circuit A1/M2
C5:20 Electronic minimum
limit of the flow tem-
perature 20 °C (only for
weather-compensated
control units)
C6:74 Electronic maximum
limit of the flow tem-
perature 74 °C (only for
weather-compensated
control units)
d3:14 Heating curve slope =
1.4 (only for weather-
compensated control
units)
d4:0 Heating curve slope = 0
(only for weather-com-
pensated control units)
d5:0 The external heating
program changeover
changes the heating
program to "Constant
operation with reduced
room temperature"
(only for weather-com-
pensated control units)
> RT + 5 K
Set
> RT + 4 K
Set
> RT + 3 K
Set
> RT + 2 K
Set
> RT + 1 K
Set
> RT
Set
> RT - 1 K
Set
> RT - 2 K
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
Heating circuit pump "ON"
RT < RT + 4 K
Actual Set
RT < RT + 3 K
Actual Set
RT < RT + 2 K
Actual Set
RT < RT + 1 K
Actual Set
RT < RT
Actual Set
RT < RT - 1 K
Actual Set
RT < RT - 2 K
Actual Set
RT < RT - 3 K
Actual Set
Minimum limit adjustable
from 1 to 127 °C
Maximum limit adjustable
from 10 to 127 °C
Heating curve slope ad-
justable from 0.2 to 3.5
(see page 32)
Heating curve level ad-
justable from –13 to 40
(see page 32)
The external heating pro-
gram changeover
changes the heating pro-
gram to "Constant central
heating with standard
room temperature"
Coding
55