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Operating instructions VRC 430f 0020042470_0112
Changing the operating mode in the default display
Operating
mode
Meaning
Auto(matic) The heating circuit is controlled according to
the target room temperature, timer pro-
grammes, and other parameters such as set
back-temp and heating curve.
Some of these parameters are programmed
by your heating engineer.
Manual The heating ciruit is controlled according to
the target room temperature.
OFF The heating circuit is switched off. The room
temperature is not displayed and cannot be
changed.
Frost protection is guaranteed.
Table 4.3 Operating modes for the heating unit
Proceed as follows:
Turn the left-hand dial.
The operating mode is highlighted.
After a delay of one second, you can select the operat-
ing mode by turning the left-hand dial.
After two seconds the display changes from highlighted
back to normal.
The selected operating mode is applied.
Th. 12.01.06
11:46
3.0 °C Outdoor
Manual
19.0 °C
> Change operating mode
Fig. 4.9 Changing the operating mode in the simplified display
Changing the room temperature in the simplified dis-
play
The heating unit is controlled according to the room
target temperature. The control system ensures that
the set room temperature is reached rapidly and is re-
tained at this level.
The prerequisite for this is that the selected heating
curve corresponds to the conditions and the thermo-
stat function is activated.
Turn the right-hand dial.
Instead of the room temperature, the current set room
temperature is highlighted. After a delay of one second
you can select the new room target temperature:
Turn the right-hand dial further until the desired
room temperature appears.
The selected room target temperature is applied after a
delay of two seconds. The display changes from being
highlighted back to normal and shows the current room
temperature.
Th. 12.01.06
11:46
3.0 °C Outdoor
Auto
20.5 °C
> change room target temperature
Fig. 4.10 Changing the room temperature in the basic display
This new value applies to the control for a specific peri-
od, depending on the operating mode selected; also see
Section 4.4.
4.4 Period of validity of changed control system
target values
If you have changed a set target value — either the tar-
get room temperature or the hot water target value — in
the basc display, the new value is applied to the control
system.
When in "Manual" mode, the control uses the temporary
temperatures until either the operation mode or the
temperature is changed.
When in "Automatic" mode, the control uses the tempo-
rary temperature until the next time window starts (if
you have changed the set target value outside a time
window) or until the end of the current time window (if
you have changed the set target value within the time
window); see Fig. 4.11.
4 Operation
12


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