Viessmann Vitodens 242-F Installation And Service Instructions Manual page 86

Code 2
"Heating circuit ..."
Parameter address With heating circuit pump logic function:
b5:...
Heating circuit pump "OFF"
3 RT
4 RT
5 RT
6 RT
7 RT
8 RT
Coding in the delivered condition
C5:20 Electronic minimum flow tempera-
ture limit 20 °C (only for operation
with standard room temperature)
C6:74 Electronic maximum flow tempera-
ture limit 74 °C (only for weather-
compensated control units)
d3:14 Heating curve slope = 1.4
d4:0 Heating curve level = 0
d5:0 With external heating program
changeover (observe setting for
coding addresses "3A", "3b" and
"3C" in the "General" group).
Heating program switches to "Con-
stant central heating with reduced
room temperature" or "Standby
mode" (subject to the value selec-
ted for the set reduced room tem-
perature).
d6:0 Heating circuit pump stays in con-
trol mode at signal "External block-
ing"
d7:0 Heating circuit pump stays in con-
trol mode at signal "External de-
mand"
d8:0 With EA1 extension:
No operating program changeover.
E1:1 Do not adjust
E2:50 With remote control:
86
(cont.)
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
Heating circuit pump "ON"
RT < RT
actual set
RT < RT
actual set
RT < RT
actual set
RT < RT
actual set
RT < RT
actual set
RT < RT
actual set
Possible change
C5:1 Minimum limit adjustable from 1 to
to 127 °C (limited by boiler-specific pa-
C5:127 rameters)
C6:10 Maximum limit adjustable from 10 to
to 127 °C (limited by boiler-specific pa-
C6:127 rameters)
d3:2 Heating curve slope adjustable from
to 0.2 to 3.5 (see page 64)
d3:35
d4:–13 Heating curve level adjustable from
to 13 to 40 (see page 64)
–
d4:40
d5:1 Heating program switches to "Con-
stant operation with standard room
temperature".
d6:1 Heating circuit pump stops at "Exter-
nal blocking" signal (subject to cod-
ing addresses "3A", "3b" and "3C")
d6:2 Heating circuit pump starts at "Exter-
nal blocking" signal (subject to cod-
ing addresses "3A", "3b" and "3C")
d7:1 Heating circuit pump stops at "Exter-
nal demand" signal (subject to cod-
ing addresses "3A", "3b" and "3C")
d7:2 Heating circuit pump starts at "Exter-
nal demand" signal (subject to cod-
ing addresses "3A", "3b" and "3C")
d8:1 Operating program changeover via
input DE1.
d8:2 Operating program changeover via
input DE2.
d8:3 Operating program changeover via
input DE3.
E2:0 Display correction
to to
+ 2 K
+ 1 K
1 K
–
2 K
–
3 K
–
5 K
–