Vaillant VRC 430f Operating And Installation Manual page 38

Appendix
Glossary
Heating curve
A heating curve shows the relationship between the out-
side temperature and the flow temperature. The selec-
tion of a heating curve allows the influencing of the flow
temperature of your heating system and therefore also
the room temperature.
The option of being able to choose from a range of
heating curves facilitates optimum adaptation of the
control to the apartment and the heating system in con-
junction with the switch-on room temp. (see menu).
Fig. G.1 shows the possible heating curves for a room
target temperature of 20 °C.
If, for example, heating curve 1.5 is selected, a flow tem-
perature of 56 °C is maintained with an outside
temperature of 0 °C.
Fig. G.1 Diagram with heating curves for a target room temper-
ature of 20 °C
Feed temperature
in ºC
Axis a
Fig. G.2 Parallel heating curve offsetting
If heating curve 1.5 is selected and 22 °C rather than
20 °C is specified as the room target temperature , the
heating curve is displaced as shown in Fig. G.2. The
heating curve is displaced according to the value of the
18
Outside temperature in ºC
room target temperature along axis a which is angled at
45°, i.e. the controller ensures a flow temperature of
67 °C with an outside temperature of 0 °C.
Heating flow temperature
Your appliance heats water which is pumped through
your heating system. The temperature of this hot water
as it leaves the appliance is referred to as the flow tem-
perature.
Interior temperature
The interior temperature, also referred to as room tem-
perature, is the actual current temperature in your
apartment.
Maximum temperature, solar cylinder
In order to ensure the highest possible returns from the
solar cylinder heating, while at the same time ensuring
that scalding/limescale protection is active, you can set
a maximum value for the solar temperature cylinder.
To do this, use the "Cylinder temp. top" SP1 sensor for
cylinder 1, if this is installed in the corresponding cylin-
der. Otherwise "Cylinder temp. bottom" SP2 is used.
SP3 is used for the second cylinder, swimming pool).
If the set temperature is exceeded, the solar circuit
pump is switched off. Solar power is only permitted
once the temperature on the active sensor drops 1.5 K
below the maximum temperature.
The maximum temperature for each cylinder can set
separately.
– Cylinder_Maximumtemperature_1:
20 ... 85 °C; Basic value 70 °C
– Cylinder_Maximumtemperature_2:
20 ... 85 °C; Basic value 60 °C
The programmed maximum temperature must not ex-
ceed the cylinder's maximum permisible water tempera-
ture!
Parameter
Parameters are the properties of your heating system.
You can influence these properties by altering the value
of a parameter, e.g. by reducing the value of the param-
eter "set-back temp" from 15 °C to 12 °C.
Switch-on room temp. (operating level for expert
technicians)
You can specify whether or not the temperature sensor
fitted in the VRC 430f should be used in screen C8 "HC1
Parameter" under the "Switch-on room temp." menu
item.
The following inputs are possible in the menu point
"Switch-on room temp.":
– None
The temperature sensor is not used for control.
– Switch on
The in-built temperature sensor measures the current
room temperature in the reference room. This value is
compared with the target room temperature and the
Installation instructions VRC 430f 0020042470_01