10
Checking the gas type
1.
Check the gas type and Wobbe index
(Wo) with your gas supply utility.
■ With the
natural gas E setting
, the
boiler can be operated in the
Wobbe index range 12.0 to
16.1 kWh/m
3
(43.2 to 58.0 MJ/m
3
).
■ With the
LPG P setting
, the boiler
can be operated in the Wobbe
index range 20.3 to 21.3 kWh/m
3
(72.9 to 76.8 MJ/m
3
).
2.
In the delivered condition, the burner
is set up for natural gas E. If required,
convert the burner to a different gas
type (see from page 11) in accord-
ance with details provided by your
gas supply utility.
Note
The 500 kW burner requires a natural
gas restrictor. A natural gas restrictor
is not required for the 400 and
620 kW burners.
Rated heating output
kW
400
500
620
Restrictor for natural gas E
7
mm
−
21.5
−
Restrictor for LPG P
7
mm
14.0
14.8
17.2
3.
Record the gas type in the report (on
page 86).
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5794 780 GB