Viessmann VITODENS 050-W Installation And Service Instructions Manual page 68

Changing the gas type
Converting from LPG to natural gas
9. Start the boiler and check for leaks.
Danger
Escaping gas leads to a risk
of explosion.
Check all gas equipment for
tightness.
Converting the gas type at the control unit
1. Turn on the ON/OFF switch.
2. Press MODE and
and hold for 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 37.
68
simultaneously
content
2
(cont.)
!
Please note
The use of leak detection
spray can result in faulty
operation.
Leak detection spray must
not come into contact with
electrical contacts or block
the diaphragm opening on
the gas valve.
5. Press MODE and
and hold for 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