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10.1 Demands
In this menu, up to 2 heating demands can be activated
and adjusted.
Activated demands will be available for selec-
tion in the relay allocation channels of the cor-
responding optional functions of the Heating
menu. This way, several optional functions can
demand the same heat source.
If, for example the potential-free changeover relay
R14 is allocated to Demand 1, the selection AH1 will
then become available in addition to the free relays
in the Demand adjustment channels of the optional
functions for the heating part of the arrangement (see
page 68). This way, e. g. the DHW heating function
can demand the same boiler for afterheating as the
thermal disinfection function.
10.2 Heating circuits
The controller has two internal, weather-compensat-
ed heating circuits and is able to control up to 5 ex-
ternal heating circuits by means of extension modules.
In the menu appearing when
New HC...
is selected,
it is possible to choose between the internal heating
circuits and, if available, registered modules.
If one or more extension modules are connected,
they have to be registered with the controller. Only
registered modules are available in the heating circuit
selection.
Extension modules can be registered in the In-/Out-
puts / Modules menu (see page 75). If an internal or
external heating circuit has been selected, a new menu
opens. In this menu, all sensors and relays required
for the heating circuit can be allocated, and all adjust-
ments can be made.
The controller calculates the set fl ow temperature for
each heating circuit by means of the averaged out-
door temperature and the selected heating curve. If
the measured fl ow temperature deviates from the set
fl ow temperature, the mixer is activated in order to
adjust the fl ow temperature correspondingly.
If the outdoor temperature falls below the point
where the calculated set fl ow temperature would ex-
ceed the maximum fl ow temperature, the maximum
fl ow temperature is treated as the set temperature
for as long as the condition remains.
If the outdoor temperature sensor is defective, an
error message is indicated. For the duration of this
condition, the maximum fl ow temperature -5 K is as-
sumed as set fl ow temperature.
With the timer, the day / night operation can be ad-
justed. During day phases, the set fl ow temperature is
increased by the adjusted day correction value, during
night phases it is decreased by the night correction
value (night setback).
Summer mode
The
Mode
channel adjustment determines how the
heating circuit is set to summer mode:
Summer off:
The summer mode becomes active
when the outdoor temperature exceeds the adjusted
summer temperature TSummer.
Ext. switch:
A switch is connected to a selected sen-
sor input. If the switch is operated, the heating circuit
is set to summer mode regardless of the outdoor
temperature.
