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11Operating Manual VRC 430 0020042468_02
Changing the parameters in the basic display
Parameters Meaning
Heating circuit 1 (HC1)
Room set tar-
get
temperature
The heating is adjusted according to
the modified room target temperature.
The length of this control period de-
pends on the operating mode, see also
Chapter 4.4.
Operating
mode
Auto(matic)
The control system of the heating unit
is according to the stipulation of the
room target temperature, the time
programme and other parameters
such as set-back temperature and
heating curve.
Some of these parameters are set by
your expert technician.
Operating
mode
Manual
The control system of the heating unit
is according to the set room target
temperature.
Operating
mode
Off
The heating unit is switched off. The
target room temperature is not dis-
played and can therefore not be
changed.
Frost protection is guaranteed.
Hot water
Hot water tar-
get value
Hot water generation is generated ac-
cording to the new target hot water
value. The duration of this control sys-
tem depends upon the operating
mode, see also Chapter 4.4.
Operating
mode
Auto(matic)
The hot water is generated according
to the target hot water temperature
and time settings.
Operating
mode
Manual
The hot water control system is based
on the hot water target value.
Operating
mode
Off
Hot water generation is switched off.
The target hot water value is not dis-
played and is also not modifiable.
Frost protection is guaranteed.
Table 4.2 Modifiable parameters in the basic display
Example: Changing the heating circuit target room
temperature 1 (HC1)
Initial situation: You are now in the basic screen (see
Fig. 4.2). Instructions for accessing the basic display are
given in Chapter 4.3.3
Turn the right-hand dial until the cursor
appears in
front of the target value (target room temperature)
for heating circuit 1 (HC1).
Press the right-hand dial.
The input field for the set target value is highlighted.
Turn the right-hand dial.
The target room temperature changes by 0.5 °C for
every dial position (click).
When you reach the required room target
temperature , Press the right-hand dial.
The new value is set. The display jumps highlighted to
normal.
The period for which the new control system value re-
mains valid depends on the current operating mode; 4.4
4.3.3 Operation in the default display
h
Note!
The simplified basic display always appears if
the mixer module VR 61 (for a second heating
circuit) is not connected and the VRC 430 is
wall-mounted (not on the front of the heating
unit).
In the case of the default display (Fig. 4.8) the operating
mode for heating circuit 1 and the internal temperature
is displayed in the centre section.
The default display also allows you to change the two
most important parameters of your heating system
quickly and comfortably:
You can change the operating mode (automatic, man-
ual, off) by rotating the left-hand dial.
By rotating the right-hand dial you can change be-
tween the display of the internal temperature and the
input/modification of the target room temperature.
Th. 12.01.06
11:46
3.0 °C Outside
Auto
19.0 °C
VRC 430
Fig. 4.8 Simplified basic display (example)
Click one or both of the dials to move from the simpli-
fied basic display to the next screen (see Fig. 4.2).
If there has been no operation of the controller for a pe-
riod in excess of 5 minutes, the display jumps back to
the simplified basic display.
Operation 4
11


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