Viessmann VITODENS 222-F Installation And Service Instructions Manual page 68

Code 1
Heating circuit 1, heating circuit 2, heating...
Parameter With heating circuit pump logic function:
address b5:... Heating circuit pump "OFF"
6 RT
actual
7 RT
actual
8 RT
actual
Coding in the delivered condition
Flow temperature minimum limit
C5:20 Electronic minimum flow
temperature limit 20 °C
(only for weather-com-
pensated control units)
Flow temperature maximum limit
C6:74 Electronic maximum flow
temperature limited to
74 °C (only for weather-
compensated control
units)
Heating program - changeover
d5:0 The external heating pro-
gram changeover
changes the heating pro-
gram to "Constant opera-
tion with reduced room
temperature" or "Standby
mode" (only for weather-
compensated control
units)
Ext. heating program changeover to heating circuit
d8:0 No heating program
changeover via extension
EA1
68
> RT
set
> RT - 1 K
set
> RT - 2 K
set
Possible change
C5:1
to
C5:127
C6:10
to
C6:127
d5:1
d8:1
d8:2
d8:3
(cont.)
Heating circuit pump "ON"
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
boiler-specific parameters)
Maximum limit adjustable
from 10 to 127 °C (limited
by boiler-specific parame-
ters)
The external heating pro-
gram changeover changes
to "Constant operation with
standard room tempera-
ture" (independent of cod-
ing address 3A, 3b and
3C)
Heating program change-
over via input DE1 at exten-
sion EA1
Heating program change-
over via input DE2 at exten-
sion EA1
Heating program change-
over via input DE3 at exten-
sion EA1