Control Unit; Functions And Operating Conditions In Weather-Compensated Mode - Viessmann Vitodens 050-W Installation And Service Instructions Manual

Control unit

Functions and operating conditions in weather-compensated mode

If an outside temperature sensor is con-
nected to the control unit, the boiler
water temperature is regulated subject to
the outside temperature.
In line with the selected heating curve, a
boiler water temperature is set for the
current outside temperature.
Heating curve for weather-compensated operation
90
80
70
60
50
40
30
20
20 15
Outside temperature in °C
X Code for selected heating curve
Frost protection function
The frost protection function requires an
outside temperature sensor to be con-
nected. The frost protection function
becomes active at outside temperatures
of < 5 °C. The burner starts and the boiler
water temperature is held at 20 °C.
62
eT
10 5
The heating curve is set at the control
unit as a code. In the delivered condition,
the heating curve with code 20 is set.
Operating instructions
eP
0 -5 -10
wT
wP
qT
qP
5
-15 -20