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

Functions and operating conditions in weather-compensated mode

In weather-compensated operation, the
boiler water temperature is regulated
according to the outside temperature.
Heating curve of the weather-compensated control unit
90
80
70
60
50
40
30
20
10
0
20 15 10
Outside temperature in °C
Setting of rotary selector "tr"
A = 1
B = 2
C = 3
D = 4
E = delivered condition
F = 5
G = 6
G
F
E
D
C
B
5 0 -5 -10 -15 -20
Frost protection function
Frost protection function is only possible
when an outside temperature sensor is
connected. Frost protection function is
active at outside temperatures of < 5°C.
The burner starts and the boiler water
temperature is held at 20 °C.
A

Control unit

55