Setting The Operating Mode; Setting Additional Parameters; Changing The Target Room Temperature - Vaillant VR 81 Supplement Manual

4.4

Setting the operating mode

h Note
The operating mode cannot be displayed or
modified if the holiday function or floor drying
function has been activated at the VRC 430
controller.
The current room temperature and selected operating
mode are displayed in the basic display.
Click the dial once.
The operating mode that has been set lights up and flash-
es.
Turn the dial until the required operating mode
appears in the display.
h Note
The operating mode is represented by a symbol.
The meaning of the symbols is explained in
Table 4.1.
Push the dial to confirm the selected operating mode,
or wait for five seconds until the basic display
appears again. The selected operating mode is
applied.
Operating manual VR 81 0020044392_00 VR 81 0020044392_00
4.5

Setting additional parameters

You can only set the target room temperature and
operating mode at the VR 81. All other settings, such as
definition of the time window or programming of the
holiday function, can only be made at the VRC 430
controller.
4.6

Changing the target room temperature

If you have changed the target room temperature at the
operator operation level, the new control value is applied
on a provisional basis depending on the operating mode
selected.
Manual operating mode
The room temperature is controlled with reference to the
new specified value until the operating mode or value is
changed.
Automatic operating mode
- If you modify the target room temperature outside a
time window:
the room temperature is controlled with reference to
the new value until the next time window starts.
- If you have modified the target room temperature
within a time window:
the room temperature is controlled with reference to
the new value until the current time window elapses.
Operation 4
11