Converting From Operation With Lpg To Operation With Natural Gas - Viessmann VITODENS 111-W Installation And Service Instructions Manual

Gas type conversion

Converting from operation with LPG to operation with natural gas

D
C
A
B
E
Fig. 30
1. To remove the burner, see page 31.
2. Undo 2 screws and remove gas train
A
3. Remove gas restrictor
from gas train .
B
4. Insert new gasket
D
If the gasket is missing, order the appropriate con-
version kit as an individual part. See parts list
(burner assembly).
5. Fit gas train with new gas gasket
B
!
Please note
Tighten screws just enough
to ensure the components do not suffer
damage and will function correctly.
6. To refit the burner, see page 34.
7. Remove or void the gas type sticker on the top of
the boiler (next to the type plate).
8. Start the boiler and check for leaks.
Danger
Escaping gas leads to a risk of explosion.
Check all gas equipment for tightness.
!
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 seal the
diaphragm opening on the gas valve.
38
.
B
for LPG and gasket
C D
in gas train B .
.
E
Changing the gas type at the control unit
01. Turn the ON/OFF switch ON.
02. Tap MODE.
03. / until CONFI flashes.
04. OK to confirm.
"P" is displayed in l.h. display area. The r.h. dis-
play area flashes.
05. Use / to select "12".
06. OK to confirm.
"1" flashes in l.h. display area.
07. Use / to select "5".
08. OK to confirm.
"1" flashes in r.h. display area.
09. Use / to switch the control unit to "0" (operation
with natural gas).
10. OK to confirm.
11. Turn the ON/OFF switch OFF and ON again.
The selected operating mode is saved.
Checking the CO content
2
See page 29.