Functional description
32
Installation instructions VRC 470 0020116690_00
8
To activate this function, set an offset value (° K). The
controller activates summer mode when the outside
temperature is greater than or equal to the current tar-
get room tempe the set offset value. The target
room temperature at night, for example, is the set-back
temperature. The controller deactivates summer mode
when the outside temperature is less than the target
room tempe the set offset value - 1 K.
8.4.12
Setting the heating curve
Menu ¬ Installer level ¬ System configuration
[HEATING 1/2 ----] ¬ Heat curve
If the heating curve setting is not sufficient to control
the living room climate according to the operator's
wishes, you can adapt the heating curve setting made
during installation.
8.4.13
Setting the minimum flow temperature for
heating circuits
Menu ¬ Installer level ¬ System configuration
[HEATING 1/2 ----] ¬ Min. temperature
You can enter a minimum value for the flow temperature
for each heating circuit, which should not be undershot
during control. The controller compares the calculated
flow temperature with the value set for the minimum
temperature and, if there is a difference, adjusts to the
higher value.
8.4.14
Setting the maximum flow temperature for
mixing circuit
Menu ¬ Installer level ¬ System configuration
[HEATING 2 ----] ¬ Max. temperature
Only with a connected VR 61/2
You can enter a maximum value for the flow tempera-
ture of HEATING 2, which should not be undershot dur-
ing control. The controller compares the calculated flow
temperature with the value set for the maximum tem-
perature and, if there is a difference, adjusts to the
lower value.
8.4.15 Reading the status of special operating modes
Menu ¬ Installer level ¬ System configuration
[HEATING 1/2 ----] ¬ Advanced functions
With this function, you can define if a special operating
mode (advanced function), such as Party function, Inter-
mittent ventilation, etc. should be activated for a heating
circuit.
8.4.16 Specifying control modes outside time periods
Menu ¬ Installer level ¬ System configuration
[HEATING 1/2 ----] ¬ System off mode
This function enables you to specify, for each heating
circuit separately, the controller functions in Automatic
mode outside active time periods.
Factory reset: Frost prot.
There are three control modes for selection, which
you can adapt further by using the Room temperature
control:
–
Frost protection:
The heating function is switched off
and the frost protection function is active. The heat-
ing circuit pump is switched off.
If a second heating circuit is connected, the heating
circuit pump is switched off and the heating circuit
mixer is closed. The outside temperature is moni-
tored. When the outside temperature falls below 3 °C,
the controller switches the heating pump on for
10 minutes after the end of the frost protection delay
time. If a second heating circuit is connected, the
heating circuit mixer remains closed. After the end of
the time, the controller checks if the flow temperature
is less than 13 °C. If the temperature is greater than
13 °C, the heating circuit pump is switched off.
If a second heating circuit is connected, the tempera-
ture of the VF2 temperature sensor is evaluated and
the heating circuit pump is switched off at a tempera-
ture greater than 13 °C. If the temperature is less than
13 °C, the controller switches the heating function on
and activates the heating circuit pump. The controller
sets the target room temperature to 5 °C and checks
again if the outside temperature has reached 4 °C. If
the outside temperature is greater than 4 °C, it
switches the heating function and the heating circuit
pump off.
–
ECO:
The heating function is switched off.
If a second heating circuit is connected, the heating
circuit pump is switched off and the heating circuit
mixer is closed. The outside temperature is moni-
tored. If the outside temperature falls below 3 °C, the
controller switches the heating function on after the
end of the frost protection delay time. The heating
circuit pump is activated.
If a second heating circuit is connected, the heating
circuit pump and the heating circuit mixer are acti-
vated. The controller controls the target room tem-
perature to the set "Night temperature". Despite the
heating function being activated, the burner is only
active on demand. The heating function remains
active until the outside temperature rises above 4 °C,
after which the controller switches the heating func-
tion off again, but the outside temperature monitor-
ing remains active.
–
Night temperature:
The heating function is switched
on and the target room temperature is set to the set
"Night temperature" and adjusted to the "Night tem-
perature".
