Expert area Part 3: General function description
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Part 3: General function descript ion
Part 3: General function description
Heat circuit control
Weather-dependent control
The heat generator or flow temperature is determined via
the set heat slope to suit the measured outside tempera-
ture in such a way that the set value for the room is ap-
proximately set if the heating system is configured correct-
ly.
=> Exact setting of the heat slope is extremely important
for weather-dependent control.
The circulation pump is controlled weather-dependently.
The circulation pump is switched on if there is a heating
demand and in Frost-protection mode.
Room sensor influence
The current room temperature can be included in computa-
tion of the required flow temperature via a present room
temperature sensor.
The influence factor (parameter list) can be set between 0
(fully weather-dependent regulation) and 20 (room tem-
perature regulation with minimal outdoor temperature in-
fluence). Position "----" deactivates room temperature con-
trol. Positions "----" and "0" indicate differences for
demand-dependent circulation pump control.
Hot water generation
The programmed hot water temperature is stabilised by
switching the hot-water cylinder charging pump and the
burner. Storage tank charging starts when the storage tank
temperature drops below the temperature setting by 5 K.
Storage tank charging stops when the temperature setting
is reached.
Frost protection function
The frost protection circuit prevents the heating system
from freezing by automatically switching heating operation
on.
Outdoor sensor frost protection
If the measured outside temperature drops below the set
frost protection temperature the room temperature setting
is set to 5 °C for the relevant heating circuit. The heating
circuit is enabled:
the pumps are switched on
the heat request is sent to the heat generator
"----" => outdoor sensor frost protection deactivated
The function stops when the outside temperature increas-
es to 1 K above the frost protection temperature setting.
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