AEG ELFAMATIC uC 3000 Gebrauchs- Und Montageanweisung Seite 25

2. Special settings
Charging model is not in list or certain parameters must be changed
Changes to the individual parameters are adopted immediately after they are entered. If no button
is pressed for 15 minutes after a change has been made (irrespective of which parameter has been
changed), the display automatically returns to the default display (time and outside temperature
are shown alternately).
Operating principle
The following points are important in understanding the operating principle of the ELFAMATIC
µC 3000:
• The temperature used to calculate the output signal is not the instantaneously measured outside
temperature but an average value derived from the determined instantaneous values with a
trend component.
• During standard operation, the ELFAMATIC µC 3000 functions in autosynchronisation mode,
i.e. the timing element is synchronised with the main release automatically while taking the
current time into consideration. As a result, it is no longer necessary to set the number of hours
since release start (operating time). When put into operation for the first time, the controller
operates in forward control mode until it receives the first LF main release pulse; this ensures
that charging is performed if an additional release is given during this time.
• With charging models where a permanent release is given, e.g. at the weekend (Powertherm), the
ELFAMATIC µC 3000 uses the previous release times to determine the start times for main release
and additional release. If the ELFAMATIC µC 3000 is put into operation on a Friday (so that it is
not possible to store the release times), synchronisation could take until Monday evening. During
this time, the controller operates in forward control mode in order to ensure that charging is
performed.
Interaction of the adjusters
with the ELFAMATIC µC 3000
E1
-20 -15 -10 -5 0
100 %
Charging
level
80
60
40
20
0
-20 -15 -10 -5 0
Outside temperature (°C)
Factory settings:
Charging model 1
5 10 15 20 25
100 %
Nominal charging level
(heat content)
5 10 15 20 25
E2
E1 = -14 °C
E2 = 18 °C
LSO = 15 %
Example of charging characteristic with 2 °C
outside temperature
80
60
40
20
2 4 6 8 10 12
Operating time (h)
E3
UZ
(22 h)
For the Fitter
E3 = 7 h
TEP = 20 %
TSP = 85 %
Full charging
of storage
heater
14 16 18 20 22 24
25