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Operating Manual VRC 430 0020042468_0212
Changing the operating mode in the simplified basic
display
Operating
mode
Meaning
Auto(matic) The heating circuit is controlled according to
the target room temperature, the timer pro-
grammes, as well as other parameters such as
set-back temperature and heating curve.
Some of these parameters are set by your ex-
pert technician.
Manual The heating circuit is controlled according to
the room target temperature.
Off The heating circuit is switched off. The target
room temperature is not displayed and also
cannot be changed.
Frost protection is guaranteed.
Table 4.3 Operating modes for the heating unit
Proceed as follows:
Rotate the left-hand dial.
The operating mode is highlighted.
After a delay of 1 second, you can select the operating
mode by rotating the left-hand dial.
After 2 seconds, the display returns to normal.
The selected operating mode is accepted.
Th. 12.01.06
11:46
3.0 °C Outside
Manual
19.0 °C
> Select operation mode
Fig. 4.9 Changing the operating mode in the default display
Changing the target room temperature in the default
display
The heating unit is controlled according to the room
target temperature. The control system ensures that
the target room temperature is achieved quickly and
maintained at this value.
For this to happen the selected heating curve must
correspond to the conditions and the room tempera-
ture control function must be activated.
Turn the right-hand dial.
The current room target temperature is highlighted
rather than the interior temperature. After a delay of 1
second you can select the new target room tempera-
ture:
Rotate the right-hand dial until the desired target
room temperature appears.
After a delay of 2 seconds the selected target room
temperature is accepted. The display then changes form
highlighted to normal and shows the internal tempera-
ture.
Th. 12.01.06
11:46
3.0 °C Outside
Auto
20.5 °C
> Select room temperature
Fig. 4.10 Changing the target room temperature in the basic
display
The period for which the new value remains valid de-
pends on the current operating mode; see also
Chapter 4.4.
4.4 The period of validity for new control system
target values
If you changed a set target value in the basic display —
either the room target temperature or the hot water
target value — the new value now applies to the entire
system.
In the "manual" operating mode the control system op-
erates according to the new value until either the oper-
ating mode or the value is changed.
In "automatic" operating mode the control system uses
the new value until the next period starts (if you
changed the set target value outside a time period) or
until the end of the current period (if you changed the
set target value within the time window; see Fig. 4.11.
4 Operation
12


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