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Stop storage tank charging
The controller stops charging the storage tank when the water temperature in the storage tank
measured at sensor SF1 reaches the value T =
DHW heating ON
+
Hysteresis
. In systems with
two storage tank sensors, the controller stops charging the storage tank when the water temper
-
ature in the storage tank measured at sensor SF2 reaches the value
DHW heating OFF
.Insys
-
tems with storage tank thermostat, the
Hysteresis
of the thermostat determines when the storage
tank charging is finished.
DHW heating from the secondary circuit (Anl 3, 8):
When a high flow temperature is required by the system, the heat exchanger charging pump is
immediately switched off. If no heating is taking place or if the flow temperature demand in the
system is lower, the
End charging process
parameter applies for switching off the heat
exchanger charging pump.
The heat exchanger charging pump is switched off at the latest after two transit time periods of
the control valve (2 x T
Y
); 15 seconds after the heat exchanger charging pump has been
switched off, the storage tank charging pump stops operating.
DHW heating from the primary circuit (Anl 5, 11):
The storage tank charging pump (Anl 5) or the heat exchanger charging pump (Anl 11) is
switched off when the temperature reaches
End charging process
parameter, at the latest, how-
ever, two transit time periods of the DHW control valve (2 x T
Y
).
In system Anl 11, 15 seconds after the heat exchanger charging pump has been switched off,
the storage tank charging pump stops operating.
Functions
WE Configuration
Storage tank sensor SF1 ON FB14
Storage tank sensor SF2 ON FB15
Flow sensor VF3 OFF FB27
Parameters
WE Range of values
DHW heating ON 45 °C 20 to 90 °C
DHW heating OFF 50 °C 20 to 90 °C
Hysteresis 5 °C 0 to 30 °C
Charging temperature 55 °C 20 to 90 °C
End charging process 53 °C 20 to 90 °C
Heat exchanger inlet temperature limit 120 °C 20 to 130 °C
52 EB 5476 EN
Functions of the DHW circuit