Service Settings
EY.65.H4.02
54
Charging procedure b Charging procedure b is used in application 3, 4, 11 and
14. The hot-water circuit has indirect storage tank con-
trol, and the tank is equipped with an internal heat ex-
changer. The following settings are available:
Display text Parameter Default value,
range
Description
Chrg. in-
crease
Charging tem-
perature in-
crease
Default value:
20 K
Range:
0-70K
While charging, the flow temperature is
maintained at a temperature equal to the
hot-water setpoint plus the charge in-
crease
Cut-in diff.
Cut-in differ-
ence
Default value:
6 K
Range:
0-50K
Charging starts when the upper tank
temperature falls below the setpoint mi-
nus ½ the cut-in difference. Charging
ends when the lower tank temperature
reaches the setpoint plus ½ the cut-in
difference or when the maximum charg-
ing time has expired (see page 56).
The diagram in Figure 6 illustrates the charging procedure and the settings. In this
example, only one sensor is installed in the hot-water tank.
Temperature
Hot-water temperature
Charge increase
Cut-in difference
Charging temperature
Time
Charging
T
set
Figure 6. Charging procedure b
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