Bedienungsanleitung Vaillant VRC 430f (Seite 38 von 40) (Englisch)

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Installation instructions VRC 430f 0020042470_0118

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

Axis a

Feed temperature

in ºC

Outside temperature in ºC

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

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

Appendix

Glossary

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