Operating and display functions 7
0020237057_01 Installation instructions
17
A
B
15
10
5
0
-5
-10
-15
-20
20
30
40
50
60
70
80
90
1.2
1.5
1.8
2
2.5
3
3.5
4
0.8
1.0
0.4
0.2
0.1
0.6
A
Outside temperature °C
B
Target flow temperature
°C
The illustration shows the possible heating curves of 0.1 to
4.0 for a target room temperature of 20 °C. If, for example,
heating curve 0.4 is selected, a flow temperature of 40 °C is
maintained at an outside temperature of -15 °C.
A
B
C
D
18
22
20
0.4
70
60
50
40
30
15
10
5
0
-5
-10
-15
-20
A
Outside temperature °C
B
Target flow temperature
°C
C
Target room temperat-
ure °C
D
Axis a
If the heating curve 0.4 is selected and 21 °C is specified for
the target room temperature, the heating curve is then trans-
lated, as shown in the figure. The heating curve is displaced
according to the value of the room target temperature along
axis a which is angled at 45°. At an outside temperature of
-15 °C, the control system provides a flow temperature of
45 °C.
7.7.16 Activating Room temp. mod.
Menu
→
Installer level
→
System configuration
→
[
HEAT-
ING1
----]
→
Room temp. mod.
–
This function allows you to define whether the temper-
ature sensor integrated in the system control or in the
remote control unit should also be used.
The prerequisite for this is:
–
The system control is installed in the living room.
–
Any remote control unit that is present is installed in the
living room.
–
In the
Zone assignment
function, the system control or
the remote control unit is assigned to the zone in which
the system control or remote control unit is installed. If
you do not assign any zones, the
Room temp. mod.
function is ineffective.
None
: The temperature sensor is not used for control.
Temp. mod.
: The built-in temperature sensor measures the
current room temperature in the reference room. This value
is compared with the target room temperature and, if there
is a difference, results in adjustment of the flow temperature
by means of the so-called "Effective target room temperat-
ure". Effective room temp. target = set room temp.
(set room temp. target - measured room temp. target). The
effective target room temperature is then used for controlling
instead of the set target room temperature.
Thermost.
: This function works in the same way as the
Temp. mod.
function, however the zone is also switched off
when the measured room temperature is + 3/16 K greater
than the set target room temperature. When the room
temperature falls + 2/16 K back below the target room
temperature set, the zone is switched on again. The use of
room temperature modulation, in combination with careful
selection of the heating curve, leads to optimum control of
the heating installation.
7.7.17 Activating Cooling possible
Menu
→
Installer level
→
System configuration
→
[
HEAT-
ING1
----]
→
Cooling possible
–
When a heat pump is connected, you can activate the
Cooling
function for the heating circuit .
7.7.18 Activating the dew point monitoring
Menu
→
Installer level
→
System configuration
→
[
HEAT-
ING1
----]
→
Dew point monitoring
–
You can use this function to activate the dew point monit-
oring.
If the dew point monitoring has been activated, the system
control compares the set minimum cooling target flow value
with the dew point+offset. The system control always selects
the higher temperature so that no condensate can form.
7.7.19 Setting the end cooling temperature
Menu
→
Installer level
→
System configuration
→
[
HEAT-
ING1
----]
→
End OT cooling
–
You can use this function to set the temperature
threshold from which cooling switches off. If the outdoor
temperature is lower than the temperature threshold set,
the system control ends cooling mode.
7.7.20 Setting the dew point offset
Menu
→
Installer level
→
System configuration
→
[
HEAT-
ING1
----]
→
Offset dew point
–
You can use this function to set the dew point offset.
The offset is a safety margin that is added to the dew point.
The system control selects the maximum for the flow temper-
ature calculated from the flow temperature that is set and the
dew point + offset.
7.7.21 Reading the status of the external heat
demand
Menu
→
Installer level
→
System configuration
→
[
HEAT-
ING1
----]
→
Status ext. heat dem.
–
You can use this function to read the heat demand on an
external input.
