Functional description
Installation instructions VRC 470 0020116690_00
31
8
8.4.3
Setting the room temperature
Menu ¬ Installer level ¬ System configuration
[HEATING 1/2 ----] ¬ Room temp. target
This function allows you to set the desired target room
temperature separately for each heating circuit.
8.4.4 Reading the current room temperature
Menu ¬ Installer level ¬ System configuration
[HEATING 1 ----] ¬ Room temp. currant
This function allows you to read the current value of the
room temperature sensor integrated in the controller.
8.4.5
Setting the set-back temperature ( set-back
temp.)
Menu ¬ Installer level ¬ System configuration
[HEATING 1/2 ----] ¬ Set-back temp.
This function allows you to set the desired set-back tem-
perature separately for each heating circuit. The set-
back temperature is the temperature to which the heat-
ing is to be reduced at times of low heat demand (e.g.
overnight).
8.4.6 Reading the target flow temperature
Menu ¬ Installer level ¬ System configuration
[HEATING 1/2 ----] ¬ Flow temp. target
This function allows you to set the target flow tempera-
ture separately for each heating circuit.
8.4.7
Reading the current flow temperature
Menu ¬ Installer level ¬ System configuration
[HEATING 1/2 ----] ¬ Flow temp. current
This function allows you to read the current flow tem-
perature separately for each heating circuit.
8.4.8
Reading the status of the heating circuit
pump
Menu ¬ Installer level ¬ System configuration
[HEATING 1/2 ----] ¬ Pump status
Only with a connected VR 61/2
This function allows you to read the current status (On,
Off) of the heating circuit pump separately for each
heating circuit.
8.4.9 Reading the status of the heating circuit
mixer
Menu ¬ Installer level ¬ System configuration
[HEATING 2 ----] ¬ Mixer status
This function allows you to read the current status
(opening, closing, stationary) of the heating circuit mixer
for HEATING 2.
8.4.10 Activating room temperature control
Menu ¬ Installer level ¬ System configuration
[HEATING 1/2 ----] ¬ Room temp control
This function allows you to define if the temperature
sensor integrated in the controller or in the remote con-
trol unit should be used.
Requirement: The controller is not installed in the boiler,
but is wall-mounted or the VR 81/2 remote control unit is
connected.
None:
Temperature sensor is not used for control.
Thermostatic control:
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 heating
flow temperature by means of the so-called "Effective
target room temperature".
Effective room set target temp. = set room target
temp. + (set room set temp. - measured room set temp.)
The effective target room temperature is then used for
controlling instead of the set target room temperature.
Thermostat:
Works in the same way as thermostatic control, however
the heating circuit is also switched off when the meas-
ured target room temperature is +3 °C greater than the
set target room temperature.
When the room temperature falls 2 °C below the set tar-
get room temperature again, the heating circuit is
switched on again.
The use of room thermostat control, in combination with
careful selection of the heating curve, leads to optimum
control of the heating installation.
8.4.11
Activating automatic summer time
recognition
Menu ¬ Installer level ¬ System configuration
[HEATING 1/2 ----] ¬ Summer mode offset
This function allows you to define if the controller
should automatically activate "Summer mode" based on
a temperature calculation for all heating circuits. The
controller remains in automatic mode.
