8 Operating and display functions
12
8.6.9
Reading the current temperature
Menu
→
Installer level
→
System configuration
→
[
HEAT-
ING1
----]
→
Current temperature
–
You can use this function to read the current temperature
of the heating circuit.
8.6.10 Setting the excess temperature
Menu
→
Installer level
→
System configuration
→
[
HEAT-
ING1
----]
→
Excessive temp.
–
You can use this function to set the excess temperature.
The excess temperature increases the current set target
temperature of the heating circuit by the value that is set.
On mixer circuits with fixed mixing, this function means that
the set target temperature can be reached in pre-heat mode,
even though the temperature of the mixer circuit drops sub-
stantially.
The function also allows for an optimal control range for op-
erating the mixer valve. Stable operation is only possible if
the mixer valve only rarely has to move to the limit stop. This
ensures improved quality of control.
8.6.11 Setting the temperature threshold for
deactivating the heating circuit
Menu
→
Installer level
→
System configuration
→
[
HEAT-
ING1
----]
→
Max limit outs.temp.
–
You can use this function to set the temperature
threshold. If the outside temperature is greater than the
switch-off threshold set, the controller deactivates heating
mode.
8.6.12 Setting the minimum flow temperature for
the heating circuit
Menu
→
Installer level
→
System configuration
→
[
HEAT-
ING1
----]
→
Minimum temperature
–
You can use this function to specify a minimum value for
the flow temperature in heating mode for each heating
circuit; the control system will not fall below this value.
The controller compares the calculated flow temperature
with the value set for the minimum temperature and, if
there is a difference, adjusts this to the higher value.
8.6.13 Setting the maximum flow temperature for
the heating circuit
Menu
→
Installer level
→
System configuration
→
[
HEAT-
ING1
----]
→
Maximum temperature
–
You can use this function to specify a maximum value for
the flow temperature in heating mode for each heating
circuit; the control system will not exceed this value. The
controller compares the calculated flow temperature with
the value set for the maximum temperature and, if there
is a difference, adjusts to the lower value.
8.6.14 Specifying controller behaviour outside
time periods
Menu
→
Installer level
→
System configuration
→
[
HEAT-
ING1
----]
→
Auto Off mode
–
This function enables you to specify, for each heating
circuit separately, the controller functions in automatic
mode outside active time periods. Default setting:
Eco
You can select from two controller behaviours, which you
can adapt further by using the room temperature control.
If you have set the value
Thermost.
for the
Room temp.
mod.
function, the
Auto Off mode
function is ineffective.
The controller always brings the target room temperature to
5 °C.
–
Eco
: The
System Off
,
Auto
(outside of the time period)
and
Off
operating modes are switched off. If a mixer cir-
cuit is connected, the heating pump is switched off and
the heating circuit mixer is closed. The outside temper-
ature is monitored. If the outside temperature falls be-
low 4 °C, the controller switches the heating function on
after the end of the frost protection delay time. The heat-
ing pump is activated. If a mixer circuit is connected, the
heating pump and the heating circuit mixer are activated.
The controller maintains the target room temperature at
the
Set-back
temperature that has been set. Despite the
heating function being switched on, the heat generator
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 function
off again, but the outside temperature monitoring remains
active.
–
Set-back
: The heating function is switched on and the
target room temperature is set to and maintained at the
Set-back
temperature that has been set.
8.6.15 Setting the heating curve
Menu
→
Installer level
→
System configuration
→
[
HEAT-
ING1
----]
→
Heating 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.
If you activate the
Adaptive heat. curve
function, you must
always adjust the value for the heating curve to the heating
surface design.
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.
Installation instructions
VRC 700/2
0020200781_01
