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
).
■ The
natural gas LL setting
ena-
bles boilers to be operated in the
Wobbe index range 10.0 to
13.1 kWh/m
3
(36.0 to 47.2 MJ/m
3
)
(not in
a
and
c
).
■ 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 in accordance with details provi-
ded by your gas supply utility (see
from page 10).
3.
Record the gas type in the report (on
page 74).
Converting to natural gas LL
(not in
a
and
c
)
BCD
EG
F
A
0
1.
Close the gas shut-off valve.
0
2.
Switch OFF the ON/OFF switch on
the control unit.
0
3.
Switch OFF the mains isolator (out-
side the installation room) or isolate
the mains power and secure against
unintentional reconnection.
0
4.
Undo fitting
A
from the gas supply
pipe.
0
5.
Pull compensation hose
G
from
the gas train.
0
6.
Release the gas train from flange
E
.
0
7.
Remove restrictor
C
with rubber
cork gasket
D
.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5683 757 GB
Содержание CM2
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