Installation Instructions

Description of functions
36 Installation instructions VRC 470f 0020124645_00
8
8.6.19 Defining the off temperature difference value
for second difference control
Menu ¬ Installer level ¬ System configuration
[Solar ----] [2nd Difference control ----] ¬ Off temp.
diff.
Only with a connected VR 68/2
This function allows you to define a difference value for
stopping solar support.
If the temperature difference between cylinder sensor
TD1 and temperature sensor TD2 in the return of the
solar circuit falls below the set value, the controller
deactivates the output MA (Multi relay).
This function is only effective if "diff. ctrl." is selected as
the setting for the multi relay (¬Section8.6.12).
8.7 Radio communication system configuration
8.7.1 Checking radio communication between
controller and radio receiver unit
Menu ¬ Installer level ¬ System configuration
[RF connection ----] ¬ Control
The quality of the radio link is indicated by a number on
a scale of 0 to 10.
0: No reception
1: Poor quality
10: Excellent quality
The reception quality indication automatically updates if
there is a change.
You should change the location of the controller or radio
receiver unit if the quality rating is below 3.
The range of radio transmission inside buildings greatly
depends on the local conditions (e.g. design and struc-
ture of the building). Consequently, an indoor range of
25 m cannot always be guaranteed. Outside enclosed
spaces (outdoors) the range is more than 100 m.
8.7.2 Checking radio communication between
outside temperature sensor/transmitter and
radio receiver unit
Menu ¬ Installer level ¬ System configuration
[RF connection ----] ¬ Outside temp. sensor
The quality of the radio link is indicated by a number on
a scale of 0 to 10.
0: No reception
1: Poor quality
10: Excellent quality
The reception quality indication automatically updates if
there is a change. In the case of the outside temperature
sensor/transmitter, that process can take up to 15 min-
utes.
You should change the location of the outside tempera-
ture sensor/transmitter or radio receiver unit if the qual-
ity rating is below 3.
The range of radio transmission inside buildings greatly
depends on the local conditions (e.g. design and struc-
ture of the building). Consequently, an indoor range of
25m cannot always be guaranteed. Outside enclosed
spaces (outdoors) the range is more than 100 m.
8.7.3 Commissioning a replacement radio controller
( teach-in)
Menu ¬ Installer level ¬ System configuration
[RF connection ----] ¬ Teach-in
If you have replaced a defective controller, you can use
this function to commission the new controller (¬Sec-
tion11.4.4).
8.8 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 func-
tion 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" direc-
tion 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
v
alue of the selected sensor. For the selected compo-
nent, read the measured values from the sensors and
check whether the individual sensors are providing the
expected values (temperature, pressure, flow volume ...).
8.9 Activating the screed drying function
Menu ¬ Installer level ¬ Screed drying function
¬HEATING 1/2
With this function, you can "dry heat" freshly laid screed
in accordance with the construction regulations, accord-
ing to a defined time and temperature plan.
When floor drying is activated, all the selected operating
modes are interrupted.
The controller controls the flow temperature of the con-
trolled heating circuit according to a pre-set program
regardless of the outside temperature.
The function is available for HEATING 1 and HEATING 2,
but not for both heating circuits at the same time. If
mixing module VR61 is connected, the function is only