Service Settings
EY.65.H4.02
55
Charg. temp. diff.
Charging procedure c
This charging proecedure is used in application 5, 6, 7,
8 and 17. The hot-water service system has indirect
storage tank charging and the tank has no internal heat
exchanger.
For this type of system, the following settings are avail-
able:
Display text Parameter Default value,
range
Description
Cut-in diff.
Cut-in differ-
ence
Default value:
15 K
Range:
0-50 K
Charging starts when the upper tank
temperature falls below the setpoint mi-
nus the cut-in difference
Cut-out diff.
Cut-out differ-
ence
Default value:
10 K
Range:
0-50 K
Charging ends when the lower tank tem-
perature reaches the setpoint minus the
cut-out difference. Alternatively, charg-
ing ends when the maximum charging
time is exceeded (see page 56)
The diagram in Figure 7 illustrates these settings for a circuit with two sensors in-
stalled in the hot-water tank:
Charging
Temperature
Upper tank temperature
Cut-in difference
T
set
= charging temperature
Cut-out difference
Lower tank temperature
T
set
Time
Figure 7. Charging procedure c
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