Viessmann Vitocrossal 300 Service Instructions For Contractors page 64

Code 1
Heating circuit 1, heating circuit 2, heating...
Parameter With heating circuit pump logic function:
address b5:... Heating circuit pump "Off"
1 RT
2 RT
3 RT
4 RT
5 RT
6 RT
7 RT
8 RT
Coding in the delivered condition
Flow temperature minimum limit
C5:20 Electronic minimum flow
temperature limit 20 °C
Flow temperature maximum limit
C6:74 Electronic maximum flow
temperature limit set to
74 °C
Heating program - changeover
d5:0 External heating program
changeover changes to
"Constant operation with
reduced room tempera-
ture" or "Standby mode"
Ext. heating program changeover to heating circuit
d8:0 No heating program
changeover via extension
EA1
64
> RT + 5 K
actual set
> RT + 4 K
actual set
> 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
RT < RT
actual
RT < RT
actual
RT < RT
actual
RT < RT
actual
RT < RT
actual
RT < RT
actual
RT < RT
actual
Possible change
C5:1 Minimum limit adjustable
to from 1 to 127 °C (limited by
C5:127 boiler-specific parameters)
C6:10 Maximum limit adjustable
to from 10 to 127 °C (limited
C6:127 by boiler-specific parame-
ters)
d5:1 The external heating pro-
gram changeover changes
to "Constant operation with
standard room tempera-
ture" (subject to coding
address 3A, 3b and 3C)
d8:1 Heating program change-
over via input DE1 at exten-
sion EA1
d8:2 Heating program change-
over via input DE2 at exten-
sion EA1
d8:3 Heating program change-
over via input DE3 at exten-
sion EA1
(cont.)
+ 4 K
set
+ 3 K
set
+ 2 K
set
+ 1 K
set
set
- 1 K
set
- 2 K
set
- 3 K
set