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18
Installation Commissioning Settings AccessoriesTroubleshooting
Display
6 Functions and options
System
System selection
Adjustment range: 1 ... 8
The system has been adjusted during commissioning.
For a detailed description of the system schemes to choose from, see chap. 2.
Note:
If the system layout selection is changed later on, any previous adjustments
which have been made in the other channels will be lost.
Boiler minimum limitation
Tmin SFB / boiler
Boiler minimum temperature
Adjustment range: 10 ... 80 °C
Factory setting: 60 °C
∆ Tmin SFB / boiler
Hysteresis SFB / boiler minimum limitation
Adjustment range: 3.0 ... 15.0 K
Factory setting: 5.0 K
In order to avoid condensation in the SFB / boiler caused by cooling of the store re-
turn at low SFB / boiler fl ow temperatures, the minimum SFB / boiler temperature
Tmin SFB / boiler can be adjusted.
Only if the temperature at sensor S1 is exceeded, will the controller switch on
the circulating pump. If the temperature at sensor 1 falls by the hysteresis ∆Tmin
SFB / boiler (adjustable in the Installer menu) below the SFB / boiler minimum
temperature, the controller switches off the circulating pump.
Differential control
∆Ton SFB / boiler
Switch-on temperature difference SFB / boiler
Adjustment range: 1.0 ... 25.0 K
Factory setting: 5.0 K
Note:
The switch-on temperature difference must be at least 0.5 K higher than
the switch-off temperature difference. The adjustment range will automat-
ically adapt to that.
∆Toff SFB / boiler
Switch-off temperature difference SFB / boiler
Adjustment range: 0.0 ... 24.5 K
Factory setting: 4.0 K
Note:
The switch-off temperature difference must be at least 0.5 K lower than
the switch-on temperature difference. The adjustment range will automat-
ically adapt to that.