6.8.1 Reverse control
In all systems with DHW heating and at least one heating circuit with control valve, DHW
heating can be given priority by applying reverse control. With the setting CO4 -> F08 - 1,
the temperature at the sensor VFx in the DHW circuit can be monitored.
In systems without the sensor VFx in the DHW circuit (e.g. Anl 4.5, 11.0), the temperature
directly at the storage sensor SF1 is monitored. If system deviations occur after the time for
Activate priority in case of deviation
has elapsed, the set point of the heating circuit with
control valve is gradually reduced each minute until the flow temperature set point has
reached 5 °C at the minimum. How strongly the controller responds is determined by the
Correction factor
.
Functions
WE Configuration
Priority through reverse control 0
2 min
1.0
CO4 -> F08 - 1
Activate priority in case of deviation / 2 to 10 min
Correction factor / 0.1 to 10.0
Priority through set-back
operation
0 CO4 -> F09 - 0
6.8.2 Set-back operation
In all systems with DHW heating and at least one heating circuit with control valve, DHW
heating can be given priority by applying set-back operation. With the setting
CO4 -> F09 - 1, the temperature at the sensor VFx in the DHW circuit can be monitored.
In systems without the sensor VFx in the DHW circuit (e.g. Anl 4.5, 11.0), the temperature
directly at the storage sensor SF1 is monitored. If system deviations occur after the time for
Activate priority in case of deviation
has elapsed, reduced operation is activated for the set
point of the heating circuit with control valve.
Functions
WE Configuration
Priority through reverse control 0 CO4 -> F08 - 0
Priority through set-back
operation
0
2 min
CO4 -> F09 - 1
Activate priority in case of deviation / 2 to 10 min
6.9 Forced charging of the DHW storage tank
To provide the full room heating performance when the time-of-use of the heating circuits be
-
gins, existing storage tanks are charged one hour before the time-of-use of the heating cir
-
cuits starts. For the individual controller, this means that storage tank charging is activated
when the water temperature in the storage tank falls below the adjusted deactivation value of
EB 5575 EN 71
Appendix
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