Vaillant VRC 430f Installation Manual download pdf (Page 17)

17Operating Manual VRC 430 0020042468_02

The comment field contains the text "Select target

room temperature".

⇒ Press the right-hand dial.

The input field is highlighted.

⇒ Turn the right-hand dial until the desired value is

displayed (values from 5 °C to 30 °C in

increments of 0.5 °C and frost protection function

are possible).

⇒ Press the right-hand dial.

The desired target room temperature or the frost func-

tion are set. The display jumps highlighted to normal.

4.7.3 Entering parameters for the heating circuit

You can enter the following parameters:

Set-back temperature

Outside the specified time windows, the heating is re-

duced to the set-back temperature.

If your expert technician has set the frost protection

function, the set-back temperature will automatically

be 5 °C. There is no display of set-back temperature.

Heating curve

The relationship between the outside temperature and

the required heating feed temperature is represented

in a diagram having various different heating curves

(see Fig. 4.15). Each heating curve (from 0.2 - 4.0)

gives a value for the heating flow temperature (verti-

cal diagram axis) for the individual outside tempera-

ture (horizontal diagram axis).

Fig. 4.15 Diagram with heating curves for a target room tem-

perature of 20 °C

Example:

If you select a heating curve of 1.5 with a target room

temperature of 20 °C, the controller provides a heating

flow temperature of 56 °C at an outside temperature of

0 °C.

The various heating curves indicate whether the heating

flow temperature should be higher or lower depending

on the outside temperature.

Note!

In a well-insulated apartment a comfortable

room temperature can be achieved even with a

flat heating curve. This saves heating energy.

Your expert heating technician will provide ad-

vice as to which heating curve should be se-

lected.

Proceed as follows to enter the parameters (example

heating circuit 1):

⇒ Turn the left-hand dial until screen 8 "HC1 param-

eters" is displayed.

> Select temperature



HC1

Set back temperature

Parameter

Heating curve

15 . 0 ° C

1 . 2

Fig. 4.16 Display screen 8 (example)

⇒ Turn the right-hand dial until the cursor



is in front

of the input field for the set-back temperature.

The comment field contains the text "Set temperature".

⇒ Press the right-hand dial.

The input field is highlighted.

⇒ Turn the right-hand dial until the desired value is

displayed (values from 5 °C to 30 °C in

increments of 0.5 °C are possible).

⇒ Press the right-hand dial.

The desired set-back temperature is set. The display

jumps highlighted to normal.

⇒ Turn the right-hand dial until the cursor



is in front

of the heating curve value.

The display field shows the text "set heating curve" in

the comment field.

⇒ Press the right-hand dial.

Operation 4

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