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6.3.2 Set-back operation
In all systems with DHW heating and at least one heating circuit with control valve, DHW heat
-
ing can be given priority by applying set-back operation. The charging temperature can be
monitored with the setting Co4 -> Fb06 = OFF and
Activate priority in case of deviation
>0.
Function
WE Configuration
Reverse control ON
0 °C
Co4 -> Fb06 = OFF
Activate priority in case of deviation / 0 to 30 °C
Note!
The priority operation is deactivated with the setting Co4 -> Fb06 = OFF and
Activate priority in
case of deviation
= 0!
6.4 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 circuits
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 T =
DHW
demand ON
+
Hysteresis
. The forced charging of the storage tank does not take place when the
DHW circuit is not activated 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.
6.5 Thermal disinfection of the DHW storage tank
In all systems with DHW heating, the DHW storage tank is thermally disinfected on a selected
Day of the week
(1 to 7) or every day (0). The storage tank is heated up to the adjusted
Disinfec
-
tion temperature.
The charging set point is always higher than the
Disinfection temperature
by
the value in
Charging boost
. Disinfection begins at the adjusted
Start time
and, at the latest,
ends at the specified
Stop time
.
When the
Disinfection temperature
has not been reached at the end of the thermal disinfection
cycle, an
ERR-2
alarm is generated and blinks on the display. This alarm can be confirmed
by opening up Co4 -> Fb08.
The alarm is automatically reset when the
Disinfection temperature
is properly reached during
the following thermal disinfection cycle.
EB 5179 EN 57
Appendix