Viessmann Vitovalor 300-P Installation And Service Instructions For Contractors page 96

Codes
Coding level 1
(cont.)
Parameter address With heating circuit pump logic function:
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
Min. flow temperature, heating circuit
C5:20 Electronic minimum flow tempera-
ture limit 20 °C (only when operat-
ing at standard room temperature)
Max. heating circuit flow temperature
C6:74 Electronic maximum flow tempera-
ture limit set to 74 °C
Heating program - changeover
d5:0 With external heating program
changeover. Observe settings of
coding addresses "3A", "3b" and
"3C" in "General" group.
Operating program switches to
"constant central heating with re-
duced room temperature" or
"standby mode" depending on the
setting of the reduced set room
temperature.
Ext. heating program changeover to heating circuit
d8:0 With EA1 extension:
No operating program changeover
Max. pump speed in standard mode
E6:... Only for heating systems without a
heating circuit with mixer:
Max. speed of internal variable
speed heating circuit pump as % of
max. speed in standard mode. Val-
ue is specified by boiler-specific
parameters (only for weather-com-
pensated control unit).
96
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 set
RT < RT
actual set
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)
d5:1 Operating program switches to "con-
stant operation with standard room
temperature".
d8:1 Operating program changeover via
input DE1
d8:2 Operating program changeover via
input DE2
d8:3 Operating program changeover via
input DE3
E6:0 Maximum speed adjustable from 0
to to 100 %
E6:100
+ 4 K
+ 3 K
+ 2 K
+ 1 K
1 K
–
2 K
–
3 K
–