Viessmann VITODENS 050-W Installation And Service Instructions Manual page 74

Changing the gas type
Converting from LPG to natural gas
Converting the gas type at the control unit
1. Turn on the ON/OFF switch.
2. Press MODE and
for approx. 3 s.
"SERV" appears on the display
and "I" flashes.
3. Use / to select "5" and confirm
with OK.
"1" flashes on the display.
4. Use / to select "0" and confirm
with OK.
The burner has been switched to
operation with natural gas.
Checking the CO
See page 42.
74
simultaneously
content
2
(cont.)
5. Press MODE and
for approx. 3 s.
Service mode is terminated. Serv-
ice mode also terminates automati-
cally after 30 min.
6. Turn the ON/OFF switch off and on
again.
The selected gas type is now ena-
bled.
simultaneously