Viessmann VITODENS 333 Operations Instructions Page 62

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Parameter ad-
dress b5:...
With heating circuit pump logic function:
Heating circuit pump "OFF" Heating circuit pump "ON"
1 RT
actual > RTset + 5 K RTactual < RTset + 4 K
2 RT
actual > RTset + 4 K RTactual < RTset + 3 K
3 RT
actual > RTset + 3 K RTactual < RTset + 2 K
4 RT
actual > RTset + 2 K RTactual < RTset + 1 K
5 RT
actual > RTset + 1 K RTactual < RTset
6 RTactual > RTset RTactual < RTset - 1 K
7 RT
actual > RTset - 1 K RTactual < RTset - 2 K
8 RT
actual > RTset - 2 K RTactual < RTset - 3 K
Coding in the delivered condition Possible change
Heating circuit A1/M2
C5:20 Electronic minimum
flow temperature limit
20 °C (only for weather-
compensated control
units)
C5:1
to
C5:127
Minimum limit adjustable
from 1 to 127 °C (limited
by boiler-specific para-
meters)
C6:74 Electronic maximum
flow temperature limit
74 °C (only for weather-
compensated control
units)
C6:10
to
C6:127
Maximum limit adjustable
from 10 to 127 °C (limited
by boiler-specific para-
meters)
d3:14 Heating curve slope =
1.4 (only for weather-
compensated control
units)
d3:2
to
d3:35
Heating curve slope ad-
justable from 0.2 to 3.5
(see page 38)
d4:0 Heating curve level = 0
(only for weather-com-
pensated control units)
d4:13
to
d4:40
Heating curve level ad-
justable from 13 to 40
(see page 38)
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)
d5:1 The external heating pro-
gram changeover
changes the heating pro-
gram to "Constant central
heating with standard
room temperature"
Code 2 (cont.)
62
Coding
5692 682 GB
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