Raising The Reduced Room Temperature; Reducing The Heat-Up Time - Viessmann VITODENS 200-W Installation And Service Instructions Manual

Function description
Control functions
(cont.)

Raising the reduced room temperature

During operation with reduced room temperature, the
reduced set room temperature can be automatically
raised subject to the outside temperature. The temper-
ature is raised in accordance with the selected heating
curve, but no higher than the set standard room tem-
perature.
Example using the settings in the delivered condition
90
80
70
60
50
40
30
Fig. 72
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.
114
10 5 0 -5 -10
Outside temperature in °C
The outside temperature limits for the start and end of
temperature raising can be set in coding addresses
"F8" and "F9" in the "Heating circuit" group.
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 coding addresses "FA" and "Fb" in the
"Heating circuit" group.