Viessmann FB2B Installation And Service Instructions Manual page 92

Code 2
Heating circuit 1, heating circuit 2, heating...
Coding in the delivered condition
A4:0 With frost protection
A5:5 With heating circuit pump
logic function (economy
circuit): Heating circuit
pump "OFF" when the
outside temperature (AT)
is 1 K higher than the set
room temperature (RT
AT > RT
Parameter address
A5:...
1
2
3
4
5
6
7
to
15
92
Possible change
A4:1
A5:0
A5:1
to
A5:15
)
set
+ 1 K
set
With heating circuit pump logic function: Heating cir-
cuit pump "OFF"
AT > RT + 5 K
set
AT > RT + 4 K
set
AT > RT + 3 K
set
AT > RT + 2 K
set
AT > RT + 1 K
set
AT > RT
set
AT > RT - 1 K
set
AT > RT - 9 K
set
(cont.)
No frost protection; this set-
ting is only possible if code
"A3:-9" has been selected.
Note
See "Please note" regard-
ing coding address "A3"
Without heating circuit
pump logic function
With heating circuit pump
logic function: Heating cir-
cuit pump "OFF"; see the
following table