Operating the System | 4
B1510622_en | Operating instructions Firewood boiler S4 Turbo
43
4.6.8 Set the heating curve of a heating circuit
90
80
70
60
50
40
30
20
Flowtemperature
-10
External temperature
-15
-5
0
5
10
15 20
Example of
floor heating
Example of
radiators
A flow temperature is calculated using the heating curve of the heating circuit depending
on the outside air temperature and the two adjustable parameters
“flow temperature
at -10°C outside air temperature”
and
“flow temperature at +10 °C
outside air temperature
“.
Example:
The heating curve is defined with 60°C (at -10°C outside air temperature) and 40°C (at +10°C
outside air temperature). If the current outside air temperature is -2°C, the flow temperature is
calculated as 52 °C.
Heating circuits without measuring the room temperature are operated using the
calculated values. The heating curve must be adapted to influence the room temperature,
"Change room temperature (heating circuit without room temperature sensor)" [
When using a room temperature sensor (analogue remote control FRA, room console
RBG 3200, room console RBG 3200 Touch, room temperature sensor) it is not necessary
to interfere with the heating curve. Any deviation of the actual room temperature to the
room temperature setpoint is automatically compensated by increasing/reducing the flow
temperature.
When starting up the system it is defined whether the heating circuit is operating as a
“high temperature circuit” or a “low temperature circuit”. The following values are set:
High temperature circuit
▪ Desired flow temperature at -10°C outside air temperature:
60 °C
▪ Desired flow temperature at +10 °C outside air temperature:
40 °C
Low temperature circuit
▪ Desired flow temperature at -10°C outside air temperature:
40 °C
▪ Desired flow temperature at +10 °C outside air temperature:
30 °C
Reduction of flow temperature
Outside of the set heating times (
active and the calculated flow temperature is reduced by the adjustable value
“Reduction of flow temperature in setback mode”
.
Heating limits
The outside air temperature heat limits are set in the “Temperatures” tab and they
activate/deactivate the heating circuit depending on the outside air temperature or time
period.
Parameter
Effect
Outside air temperature, at which heating circuit
pump switches off in heating mode (default:
18°C)
If the outside air temperature difference rises
above the set value, the heating circuit is
deactivated. (Pump off, mixing valve closes)
Outside air temperature, at which heating circuit
pump switches off in setback mode (default:
7°C)
If the outside air temperature in setback mode
(default: 22:00 – 06:00) falls below the set
value, the heating circuit is activated (pump on,
mixing valve regulated as per heating curve)