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 -> F08 - 1, the charging temperature can be monitored in the DHW circuit. In systems
without the sensor VFx in the DHW circuit (e.g. Anl 4.5, 11.0, 12.0, 13.0, 21.0), the tem-
perature directly at the storage tank sensor SF1 is monitored. If system deviations still occur
after the time for
Activate priority in case of deviation
has elapsed, the set point of the heat-
ing circuit or supplementary heating circuit – with several possibilities Rk3/Y3 – is set to re-
duced operation.
Functions
WE
Configuration
Priority through reverse control
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 wa-
ter temperature in the storage tank falls below the adjusted deactivation value of T =
DHW
temperature
+
hysteresis
. The forced charging of the storage tank does not take place when
the DHW circuit is not used at the beginning of the time-of-use set for the heating circuit(s).
Note:
This function is not available when a storage tank thermostat is used.
6.10 Thermal disinfection
In all systems with DHW heating, the DHW storage tank is thermally disinfected on a se-
lected
Day of the week
or every day.
4
In systems with DHW storage tank, it is heated up, taking into account the
Charging tem-
perature boost
parameter (or
Set point boost
, depending on the system) to the adjusted
Disinfection temperature
. Disinfection begins at the adjusted
Start time
and, at the latest,
ends at the specified
Stop time
.
4
In systems with DHW heating in instantaneous heating system, the function remains active
taking into account the
Set point boost
parameter until the circulation pipe, measured at
92
EB 5579 EN
Functions of the DHW circuit
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