Viessmann Vitotronic 300 Operating Instructions Manual page 14

Settings
Time programs
(continued)
Changing and scanning the time program for central heating (continued)
1
0 3 6 9 12 15 18 21 24
1-7
Central Htg. Phase 2 OFF
1-7
14
To exit the setting mode at any time
1. A Press A; the display
changes to "Exit? Yes".
2. d Press d to confirm; the
display changes and
shows the boiler tempera
ture.
To scan the time phases
Follow the procedure described on
page 13, but without using the a
and b buttons.
The time phases at a glance
1. Open the hinged cover on the
programming unit.
2. Press the heating circuit selector
button; the button is lit.
3. Press A and c simultaneously;
the preset time phases appear on
a time slot graphic.
4. Close the hinged cover on the pro
gramming unit.
To erase the time phases
1. Open the hinged cover on the pro
gramming unit.
2. Press the heating circuit selector
button; the button is lit.
3. A Press A; the "Central
heating time program" dis
play appears in the display
window.
4. d Press d until the required
"Central heating phase
OFF" appears.
5. b Press b until the display
" : " appears for the
finishing time.
6. d Press d to confirm until
the display changes and
shows the boiler tempera
ture.
7. Close the hinged cover on the pro
gramming unit.