Vaillant VRC 430 Operating and, Operating And Installation Manual

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Operating mode
Operating modes "Auto" (Automatic), "Manual" and
"OFF" are available. You can specify the way in which
your room heating and water heating are controlled
using the operating modes (see operating instructions
Section 4.3.2, Table 4.2).
Parameter
Parameters are the properties of your heating system.
You can influence these properties by altering the value
of a parameter, such as, e.g. reducing the value of the
parameter "Set-back Temperature" from 15 °C to 12 °C.
Room control switching (operating level for the
installer)
In the screen C8 "HC1 Parameter“, in the menu point
"Room control" you can decide whether to use the
temperature sensor fitted in the VRC 430 or in the
remote control unit. The prerequisite is that the
VRC 430 is wall-mounted or that the remote control unit
VR 81 is connected.
The following inputs are possible in the menu point
"Room control switching":
–
None
The temperature sensor is not used for control.
– Switching
The in-built temperature sensor measures the current
room temperature in the reference room. This value is
compared with the set target room temperature and, if
there is a difference, the heating flow temperature is
adjusted to suit.
– Thermostat
The in-built temperature sensor measures the current
room temperature in the reference room. If the
measured value is below the set target room
temperature, the heating flow temperature is
increased, if the value is above the set target room
temperature, the boiler is switched off.
The use of the room switching, in combination with
careful selection of the heating curve, leads to optimum
control of the heating system.
Set-back temperature
The set-back temperature is the temperature to which
your heating lowers the room temperature to outside
the programmed time windows.
Summer/Winter changeover
In the screen 1 "Basic Data" in the menu point "Mode
selection" you can determine whether the changeover
from summer to winter should take place automatically
(Selection: Auto).
The factory setting (as-supplied condition) is for
automatic changeover not to take place (Selection: Off).
If the VRC 430 is equipped with the outside sensor
VRC 9535, which receives the radio time signal DCF77,
summer/winter changeover takes place automatically;
in this case switching the automatic changeover off is
not possible (Selection: Off).
Target room temperature
The target room temperature is the temperature that
you would like in your apartment and which is specified
in your controller. Your boiler continues to provide heat
until the room temperature is equal to the target room
temperature.
When entering the time programmes, the target room
temperature is also referred to as the comfort
temperature.
Target values
Target values are the desired values which you specify
to the controller. e. g. the target room temperature or
the target temperature for the hot water preparation.
Time window
For the heating, the hot water generation and the
circulation pump three time windows per day can be
programmed (see operating instructions Section 4.7.1).
A target value is allocated to each time window
programmed for the heating.
The programmed time windows for hot water generation
refer to the hot water target value (see screen 10 "hot
water parameter")
In the case of the circulation pump the time windows
determine the operating times.
In automatic mode the control is in accordance with the
specified values in the time windows.
Appendix
Glossary
Operating and Installation instuctions VRC 430