63
Example:
■
Parameter 497.0 set to 0.
■
Parameter 497.2 set to 0.
■
The time phase for the DHW circulation pump has
started before the time phase for cylinder heating.
The DHW circulation pump runs.
Cylinder heating starts. The DHW circulation pump
keeps running.
497.3 Number of cycles DHW circulation pump
If 497.0 is set to 4, the DHW circulation pump runs
within the time program at the set number of cycles
per hour.
1 cycle lasts 5 min.
The run cycles occur at equal intervals over the 1 hour
period.
Example:
Setting 497.3:
4 corresponds to 5 cycles per hour
Overall runtime of DHW circulation pump per hour:
5 x 5 min = 25 min
Value Meaning
0 1 cycle per h
1 2 cycles per h
2 3 cycles per h
3 4 cycles per h
4 5 cycles per h
5 6 cycles per h
497.4 Trigger cycle duration
Runtime of DHW circulation pump on external
demand:
When an external button is pressed, the DHW circula-
tion pump runs for the duration set here.
Requirements:
■
A button is connected to digital input 1 (connec-
tion 143.2).
■
Parameter 1232.0 to 1
■
Parameter 497.0 to 3
503 Scald protection
503.0 Scald protection
Scald protection limits the cylinder temperature to max.
60 °C.
Value Meaning
0 Scald protection off:
DHW cylinder can be heated to the max. cyl-
inder temperature.
1 Scald protection on:
DHW heating ends when the cylinder temper-
ature reaches 60 °C.
Danger
With scald protection switched off, a set DHW
temperature higher than 60 °C can be selected.
Consequently there is an increased risk of
scalding!
Where possible, do not switch off scald protec-
tion.
504 Limits for set DHW temperature
504.1 Min. set cylinder temperature
Min. selectable set cylinder temperature: Do not set this value higher than the value in parame-
ter 504.3.
DHW parameter group
497 Settings for DHW circulation pump (cont.)
6218234
Parameter
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