Viessmann FB2B Installation And Service Instructions Manual page 73

4.8 to 26 kw gas condensing/solar storage combi boiler natural gas and lpg version gas council no.: 47-819-18 19 kw 47-819-19 26 kw
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Heating circuit 1, heating circuit 2, heating...
Coding in the delivered condition
Pump idle time transition red. mode
A9:7
With pump idle time:
Heating circuit pump
"OFF" in case of set value
modification by changing
the operating mode or
changing the set room
temperature
Weather-compensated/room temperature hook-up
b0:0
With remote control:
Heating mode/reduced
mode: weather-compen-
sated (change code only
for the heating circuit with
mixer)
Summer eco function room temperature
b5:0
With remote control: no
room temperature-
dependent heating circuit
pump logic function
(change code only for
heating circuit with
mixer)
Parameter
With heating circuit pump logic function:
address b5:...
Heating circuit pump "OFF"
1
RT
actual
2
RT
actual
3
RT
actual
4
RT
actual
5
RT
actual
6
RT
actual
7
RT
actual
8
RT
actual
Possible change
A9:0
A9:1
to
A9:15
b0:1
b0:2
b0:3
b5:1
to
b5:8
> RT
+ 5 K
set
> RT
+ 4 K
set
> RT
+ 3 K
set
> RT
+ 2 K
set
> RT
+ 1 K
set
> RT
set
> RT
- 1 K
set
> RT
- 2 K
set
(cont.)
Without pump idle time
With pump idle time;
adjustable from 1 to 15
Heating mode: weather-
compensated
Reduced mode: with room
temperature hook-up
Heating mode: with room
temperature hook-up
Reduced mode: weather-
compensated
Heating mode/reduced
mode: with room tempera-
ture hook-up
Heating circuit pump logic
function, see the following
table:
Heating circuit pump "ON"
RT
< RT
+ 4 K
actual
set
RT
< RT
+ 3 K
actual
set
RT
< RT
+ 2 K
actual
set
RT
< RT
+ 1 K
actual
set
RT
< RT
actual
set
RT
< RT
- 1 K
actual
set
RT
< RT
- 2 K
actual
set
RT
< RT
- 3 K
actual
set
Code 1
73

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