Control Unit; Functions And Operating Conditions In Weather-Compensated Mode - Viessmann Vitodens 100-W Installation And Service Instructions Manual

Control unit

Functions and operating conditions in weather-compensated mode

In weather-compensated mode, the
boiler water temperature is regulated
subject to the outside temperature.
Heating curve for weather-compensated control
90
80
70
60
50
40
30
20
10
0
20 15
Outside temperature in °C
Setting of rotary selector "tr"
A = 1
B = 2
C = 3
D = 4
E = delivered condition
F = 5
G = 6
52
G
F
E
10 5 0 -5 -10 -15 -20
Note
Y-plan and S-plan systems cannot be
operated in weather-compensated
mode.
For further information, see separate
installation instructions for the cylinder
demand terminal box (accessories).
D
C
B
A
Frost protection function
The frost protection function requires
an outside temperature sensor to be
connected.
The frost protection function is active at
outside temperatures of < 5 °C. The
burner starts and the boiler water tem-
perature is held at 20 °C.