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9.3.4 Quick charging
Uses a higher loading temperature to load the the upper region of the
storage tank more quickly in order to provide early prevention of back-
up heating by the conventional heating system. To do this, the loading
strategy of the first-priority storage tank is changed from differential
loading to absolute temperature loading as soon as the temperature in
the upper tank region drops below T
on
*)
. At the same time, an attempt is
made to achieve a higher temperature in the storage tank by using the
speed control.
*)
To retain the proven quick charging functionality , when T
on
is changed the value
of T
off
is changed in parallel.
Note
To use the quick charge function, the speed control must be
switched on; more information on this is provided in Section 10,
p. 43 (P18, P19).
Display Characteristic min. max.
Factory
setting
Activation on, oFF
oFF
Sensor input for upper storage tank
temperature
1 ... 5 –
Switch-on temperature T
on
0 °C 85 °C 50 °C
Switch-off temperature T
off
T
on
+ 2 K T
on
+ 10 K 52 °C
9.3.5 Heat quantity
Calculates the acquired heat volume based on the following information:
• Supply temperature
• Return temperature
• Flow rate volume determined via calculations based on the pump
speed or by pulse water meter measurements (terminal 5).
Note
Calculation based on the pump speed cannot be performed
when No system (system 0.1) has been selected.
• Glycol proportion and accounting for the temperature dependent
thermophysical properties of the heat transfer fluid
Additional possibility: Display of the amount of CO
2
saved by using the
system. The amount of CO
2
is calculated from the acquired heat volume.
To do this, the controller requires the conversion factor g
CO2
/kWh
therm
to
be entered.
Display Characteristic min. max.
Factory
setting
Activation on, oFF
oFF
Type of flow rate acquisition tyP 1, tyP 2
1)
–
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