Reducing The Heat-Up Time - Viessmann Vitodens 222-F Installation And Service Instructions For Contractors

Function description
Control functions
(cont.)
Example using the settings in the delivered condition
90
80
70
60
50
40
30
Fig. 76
Heating curve for operation with standard room
A
temperature
Heating curve for operation with reduced room
B
temperature

Reducing the heat-up time

During the transition from operation with reduced room
temperature to operation with standard room tempera-
ture, the boiler water or flow temperature will be raised
in accordance with the selected heating curve. The
boiler water or flow temperature can be automatically
increased.
112
10 5 0 -5 -10
Outside temperature in °C
A
B
-15 -20
The value and duration for the additional raising of the
set boiler water temperature or set flow temperature
can be set in parameters FA and Fb in the "Heating
circuit" group.