Viessmann Vitodens 333 Service Instructions Manual page 104

Function description
Control functions
Reducing the heat up time
During the transition from operation
with reduced room temperature to
operation with standard room tem-
perature, the boiler water or flow tem-
perature will be raised in accordance
with the selected heating curve. The
boiler water or flow temperature can
be automatically increased.
Example using the settings in the delivered condition
A Start of operation with standard
room temperature
B Set boiler water or flow tempera-
ture in accordance with the
selected heating curve
104
(cont.)
The value and duration of the addi-
tional increase of the set boiler water
temperature or flow temperature can
be adjusted in the coding addresses
"FA" and "Fb".
C Set boiler water or flow tempera-
D Duration of operation with raised
ture in accordance with coding
address "FA":
50 °C + 20 % = 60 °C
boiler water or flow temperature in
accordance with coding address
"Fb":
60 min