8 Operating and display functions
18
–
You can use this function to define a differential value
for stopping the temperature difference control, such as
solar heating support.
If the difference between temperature difference sensor 1
and temperature difference sensor 2 falls below the specified
switch-off differential or exceeds the maximum temperature
at temperature difference sensor 2, the controller then con-
trols the temperature difference output. The temperature dif-
ference control stops.
8.12.3 Setting the minimum temperature
Menu
→
Installer level
→
System configuration
→
[
2nd
temperature difference control
----]
→
Minimum temper-
ature
–
You can use this function to set the minimum temperat-
ure in order to start the temperature difference control.
Defining the switch-on differential for the second temperature
difference control (
→
Page 17)
8.12.4 Setting the maximum temperature
Menu
→
Installer level
→
System configuration
→
[
2nd
temperature difference control
----]
→
Maximum temper-
ature
–
You can use this function to set the maximum temperat-
ure in order to stop the temperature difference control.
Defining the switch-off differential for the second temperature
difference control (
→
Page 17)
8.12.5 Reading the value for temperature
difference sensor 1
Menu
→
Installer level
→
System configuration
→
[
2nd
temperature difference control
----]
→
TD1 sensor
–
You can use this function to read the current measured
value for temperature difference sensor 1 (TD1).
8.12.6 Reading the value for temperature
difference sensor 2
Menu
→
Installer level
→
System configuration
→
[
2nd
temperature difference control
----]
→
TD2 sensor
–
You can use this function to read the current measured
value for temperature difference sensor 2 (TD2).
8.12.7 Reading the status of the temperature
difference control
Menu
→
Installer level
→
System configuration
→
[
2nd
temperature difference control
----]
→
TD output
–
You can use this function to read the status of the tem-
perature difference control.
8.13
Ventilation
8.13.1 Reading the air quality sensor
Menu
→
Installer level
→
System configuration
→
[
Ventila-
tion
----]
→
Air quality sensor 1/2/3
–
You can use this function to read the measured values
from the air quality sensor.
8.13.2 Setting the maximum value for air quality
sensor
Menu
→
Installer level
→
System configuration
→
[
Ventila-
tion
----]
→
Max. air qual. sensor
–
You can use this function to set a maximum value for the
air quality.
If the air quality exceeds the maximum value specified, the
controller activates the
recoVAIR.../4
ventilation unit accord-
ingly. You will find a detailed description of functions in the
recoVAIR.../4
manual.
8.14
Selecting the expansion module for sensor/
actuator test
Menu
→
Installer level
→
Sensor/actuator test
→
[Select
module]
–
This function allows you to select a connected expansion
module for the sensor and actuator test. The controller
lists the actuators and sensors of the selected expansion
module. If you confirm the selection of an actuator with
"
OK
", the controller activates the relay. The actuator's
function can now be checked. Only the activated actuator
is active, all other actuators are "deactivated" at this time.
For example, you can drive a mixer in the "
Open
" direction
and check that it is connected the right way round or activate
a pump and check that it starts up. If you select a sensor, the
controller shows the measured value of the selected sensor.
For the selected component, read the measured values from
the sensors and check whether the individual sensors are
providing the expected values (temperature, pressure, flow
rate, etc.).
8.15
Activating the screed-drying function
Note
All heat pumps except for the hybrid heat pump
are used for screed drying.
Menu
→
Installer level
→
Screed-drying function
→
HEAT-
ING1
–
You can use this function to "dry heat" freshly laid screed
in accordance with the construction regulations, accord-
ing to a defined time and temperature plan.
When screed drying is activated, all the selected operating
modes are interrupted. The controller controls the flow tem-
perature of the controlled heating circuit according to a pre-
set program, regardless of the outside temperature.
Days after starting the func-
tion
Target flow temperature for
this day [°C]
1
25
2
30
3
35
Installation instructions
VRC 700/2
0020200781_01
