Operating instructions

Yes
Operational bur-
ner
Stops below set
boiler tempera-
ture and immedi-
ately restarts
again
Check flue gas
system for sound-
ness (flue gas
recirculation),
check gas flow
pressure
Checking the gas type
1. Enquire about the gas type and
Wobbe index (Wo) from your local
mains gas or LPG supplier.
Note
In the as delivered condition, Vito-
dens 333 is set up for natural gas
E.
The boiler can b e operated in the
Wobbe index range 12.0 to
16.1 kWh/m
3
(43.2to58.0MJ/m
3
).
2. Compa re the gas categ ory (gas
type) and gas group with the details
on the burner label.
3. If these details do not match the
fuel provided, the burner must be
convertedaccordingtothedetails
provided by the mains gas or the
LPG supplier.
Seeseparateconversionkit
installation instructions.
After conversion to
&
Natural gas LL
The boiler can be operated in the
Wobbe index rang e 10.0 to
13.1 kWh/m
3
(36.0to47.2MJ/
m
3
).
&
LPG P
The boiler can be operated in the
Wobbe index rang e 21.4 to
22.5 kWh/m
3
(76.9to81.0MJ/
m
3
).
4. Set the gas type via coding
address 1E at the control unit.
Note
To call up code 1 and for setting the
coding addr ess, see page 39 .
Further details regarding the individual steps (cont.)
12
Initial start-up, inspection, maintenance
5692 548 GB