Viessmann C3TB, Installation And Service Instructions For Contractors

Page: 107 / 188

107
Coding in the delivered condition Possible change
A9:7 With pump idle time: heating circuit
pump "OFF" when set value is
modified by changing the operating
mode or changing the set room
temperature A9:0 Without pump idle time
A9:1
to
A9:15 With pump idle time, adjustable from
1 to 15.
1 = short idle time
15 = long idle time
b0:0 For heating circuit with mixer and
remote control only:
Heating mode/reduced mode:
Weather-compensated b0:1 Heating mode: Weather-compensa-
ted
Reduced mode: With room tempera-
ture hook-up
b0:2 Heating mode: With room tempera-
ture hook-up
Reduced mode: Weather-compen-
sated
b0:3 Heating mode/reduced mode: With
room temperature hook-up
b2:8 Only for heating circuit with mixer
and remote control. Operation with
room temperature hook-up must
be programmed for the heating cir-
cuit:
Room influence factor 8 b2:0 Without room influence
b2:1
to
b2:64 Room influence factor adjustable
from 1 to 64. The higher the value,
the greater the room influence.
b5:0 For heating circuit with mixer and
remote control only:
Without room temperature-de-
pendent heating circuit pump logic
function b5:1
to
b5:8 Heating circuit pump logic function,
see the following table.
Parameter address
b5:... With heating circuit pump logic function:
Heating circuit pump "OFF"
Heating circuit pump "ON"
1 RT
actual
>
RT
set
+ 5 K RT
actual
< RT
set
+ 4 K
2 RT
actual
>
RT
set
+ 4 K RT
actual
< RT
set
+ 3 K
3 RT
actual
>
RT
set
+ 3 K RT
actual
< RT
set
+ 2 K
4 RT
actual
>
RT
set
+ 2 K RT
actual
< RT
set
+ 1 K
5 RT
actual
>
RT
set
+ 1 K RT
actual
< RT
set
6 RT
actual
>
RT
set
RT
actual
< RT
set
–
1 K
7 RT
actual
>
RT
set
–
1 K RT
actual
< RT
set
–
2 K
8 RT
actual
>
RT
set
–
2 K RT
actual
< RT
set
–
3 K
Coding in the delivered condition Possible change
C5:20 Electronic minimum flow tempera-
ture limit 20 °C (only when operat-
ing at standard room temperature) C5:1
to
C5:127 Minimum limit adjustable from 1 to
127 °C (limited by boiler-specific pa-
rameters)
C6:74 Electronic maximum flow tempera-
ture 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 pa-
rameters)
d3:14 Heating curve slope = 1.4 d3:2
to
d3:35 Heating curve slope adjustable from
0.2 to 3.5 (see page 88)
d4:0 Heating curve level = 0 d4:–13
to
d4:40 Heating curve level adjustable from
–
13 to 40 (see page 88)
Codes
Coding level 2
(cont.)
5775 636 GB
Codes