Viessmann B2TB, Installation And Service Instructions For Contractors, Page: 79 / 156

79
"Room influence factor"
Setting Explanations
The higher the value the greater the room
influence B2:8 Room influence factor 8
With remote control, and for the heating circuit, opera-
tion with room temperature hook-up must be set
Change value only for the heating circuit with mixer
Without B2:0
The higher the value the greater the room
influence B2:1 to
B2:64 Room influence factor adjustable from 1 to 64.
"Economy function room temperature"
Setting Explanations
Without B5:0 With remote control: no room temperature-dependent
economy function.
Change value only for the heating circuit with mixer.
... see service instructions B5:1 to
B5:8 For economy function, see the following table:
Parameter
b5:... With economy 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
"Minimum flow temperature limit, heating circuit"
Setting Explanations
20 °C C5:20 Electronic minimum flow temperature limit set to 20 °C
... °C C5:1 to
C5:127 Minimum limit adjustable from 1 to 127 °C (limited by
boiler-specific parameters)
"Maximum flow temperature limit, heating circuit"
Setting Explanations
74 °C C6:74 Electronic maximum flow temperature limit 74 °C
... °C C6:10 to
C6:127 Maximum limit adjustable from 10 to 127 °C (limited
by boiler-specific parameters)
"Slope"
Setting Explanations
1.4 D3:14 Heating curve slope = 1.4
... D3:2 to
D3:35 Heating curve slope adjustable from 0.2 to 3.5
Parameter level 2
Heating circuit 1, heating circuit 2, heating…
(cont.)
5789 302 GB
Parameter