Viessmann Vitodens 333 Service Instructions Manual page 57

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
flow temperature limit
20 °C (only for weather
compensated control
units)
C6:74 Electronic maximum
flow temperature limit
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 al-
ters the heating pro-
gram 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 (limited
by the boiler coding card)
Maximum limit adjustable
from 10 to 127 °C (limited
by the boiler coding card)
Heating curve slope ad-
justable from 0.2 to 3.5
(see page 34)
Heating curve level ad-
justable from 13 to 40
(see page 34)
The external heating pro-
gram changeover
changes the heating pro-
gram to "Constant central
heating with standard
room temperature"
Coding
57