Viessmann Vitodens 333 Service Instructions Manual page 32

Initial start-up, inspection, maintenance
Further details regarding the individual steps
Adjusting the heating curves (only for control units for
weather-compensated operation)
The heating curves illustrate the rela-
tionship between the outside tem-
perature and the boiler water or the
flow temperature.
To put it simply: The lower the outside
temperature, the higher the boiler
water or flow temperature.
A Heating curve slope for underfloor
heating systems
32
(cont.)
The room temperature, again,
depends on the boiler water or the
flow temperature.
Settings in the delivered condition:
&
Slope = 1.4
&
Level = 0
B Heating curve slope for low tem-
perature heating systems
(according to the Energy Savings
Order [Germany])