Viessmann FB2A Installation And Service Instructions For Contractors page 71

Heating circuit 1/heating circuit 2
Coding in the delivered condition
Start temperature raising
F8:-5 Temperature limit for ter-
minating the reduced
mode -5 ºC, see example
on page 116.
Observe the setting of
coding address "A3".
End temperature raising
F9:-14 Temperature limit for rais-
ing the reduced set room
temp. -14 ºC, see exam-
ple on page 116.
Increase set flow temperature
FA:20 Raising the set boiler
water temperature or the
set flow temperature
when changing from
operation with reduced
room temperature to
operation with standard
room temperature, by
20 %. See example on
page 117.
Duration set flow temperature increase
Fb:30 Duration for raising the
set boiler water tempera-
ture or the set flow tem-
perature (see coding
address "FA") 60 min.
See example on
page 117.
(cont.)
Possible change
F8:+10 Temperature limit adjusta-
to ble from
F8:-60 +10 to -60 °C
F8:-61 Function disabled
F9:+10 Temperature limit for rais-
to ing the set room tempera-
F9:-60 ture to the value selected
for standard mode adjusta-
ble from
+10 to -60 °C
FA:0 Temperature rise adjusta-
to ble from 0 to 50 %
FA:50
Fb:0 Duration adjustable from 0
to to 300 min;
1 step ≙ 2 min
Fb:150
Code 1
71