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5Operating manual – auroMATIC 560 0020008427_01
4 Functions
4.1 Solar yield
The solar controller works on the principle of differen-
tial temperature control system. The controller always
switches on the collector pump when the difference in
temperature (collector temperature - cylinder tempera-
ture) is greater than the programmed activation differ-
ence.
The controller switches off the collector pump when the
difference in temperature (collector temperature - cylin-
der temperature) is less than the programmed deactiva-
tion difference.
The expert technician sets the parameters to the install-
er level when the solar controller is installed.
The solar yield is determined from:
The difference in temperature between the collector‘s
forward flow and return flow
The flow value specified (during installation) at the
control valve of the flow rate limiter
The running time of the collector pump
During installation the expert technician sets the flow
rate limiter and enters the flow rate into the solar con-
troller at the installer level. The solar yield is calculated
by the solar controller. The total yield can be called up
and reset in the installer level.
4.2 Reheating
The reheating function allows the cylinder to heat up to
the required temperature during a set time window,
even if the solar yield is insufficient. In this case the
water can be reheated using an external heater or an
electrical heating rod. You can set up time windows for
reheating the solar cylinder (see Section 5.5.3 for de-
tails).
4.3 Reheating delay
The controller is equipped with a reheating delay func-
tion to prevent unnecessary reheating by an external
heater or an electrical heating rod. This function delays
reheating by up to 30 min. in case the collector pump is
running and the solar yield becomes available. If the col-
lector pump remains off and/or the desired cylinder
temperature is not reached after the delay period, the
cylinder is reheated using the external heater or electri-
cal heating rod.
The reheating delay function is activated in the installer
level.
4.4 Anti-legionella function
The anti-Legionnaire‘s disease protection function is de-
signed to kill germs in the cylinder and pipelines.
When the function is activated, the cylinder, the corre-
sponding hot water pipes and circulation pump (if in-
stalled) are brought to a temperature of at least 60 °C
once a week at a specific time on a specific day, or
every day.
In doing so, the cylinder temperature is raised to 71 °C
and the corresponding circulation pump is switched on
(if installed). The anti-legionella function is implemented
either via an external heater or electrical heating rod if
this is used for reheating. The anti-Legionnaire’s disease
protection function will stop once a temperature of at
least 68 °C has been maintained for a period of
30 minutes.
The anti-legionella function is activated by the expert
technician at installer level.
4.5 Pump blocking protection
If no pumping has occurred for 23 hours, all installed
pumps are switched on for roughly 3 seconds to prevent
the pumps from seizing.
4.6 Circulation
If you only have one collector field connected, a circula-
tion pump can be connected to the controller. You can
specify up to three heating windows for the circulation
pump in the timer program (see Sec. 5.5.4). Set up the
time program so that the circulation pump only oper-
ates at times when you expect a supply of hot water de-
mand will be needed. Otherwise the circulation pump
operates unnecessarily and inadvertently cools down
the cylinder.
4.7 Calendar
The controller is equipped with a calendar so that it can
automatically adjust for daylight-savings time. To acti-
vate it, simply enter the current date in the installer
level.
h
Note
Please observe that in the event of a power
failure the controller only has a power reserve
of 30 minutes. After 30 minutes, the internal
clock stops and the calender will not automati-
cally resume function once power has been re-
stored. In this case the time and date will need
to be reset.
4.8 Activation duration controlling
Activation duration controlling serves to keep the solar
circuit at the activation value, and thus in operation, for
as long as possible. The pump is switched on and off in
periodical bursts depending on the difference between
the collector temperature and lower cylinder sensor.
When the activation difference is reached, the function
is started (if activated) with an activation duration of
30 % – i.e. the pump is switched on for 18 seconds and
then switched off for 42 seconds. If the difference in
temperature increases, the activation duration is pro-
longed (e.g. 45 seconds on, 15 seconds off). If the differ-
ence in temperature falls, the activation duration is re-
duced (e.g. 20 seconds on, 40 seconds off). The period
length is always a minute. Activation duration control is
activated in the installer level.
Functions 4
5


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