Checking The Gas Type; Converting To Natural Gas Ll - Viessmann Vitocrossal 200 Service Instructions For Contractors

Commissioning, inspection, maintenance
Further details regarding the individual steps

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
3
16.1 kWh/m
■ The natural gas LL setting ena-
bles boilers to be operated in the
Wobbe index range 10.0 to
13.1 kWh/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
(72.9 to 76.8 MJ/m

Converting to natural gas LL

(not in a and c)
B C D F
A
01. Close the gas shut-off valve.
10
(43.2 to 58.0 MJ/m
(36.0 to 47.2 MJ/m
3
).
E G
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
).
3. Record the gas type in the report (on
page 74).
3 )
3
02. Switch OFF the ON/OFF switch on
the control unit.
03. Switch OFF the mains isolator (out-
side the installation room) or isolate
the mains power and secure against
unintentional reconnection.
04. Undo fitting A from the gas supply
pipe.
05. Pull compensation hose G from
the gas train.
06. Release the gas train from flange
E.
07. Remove restrictor C with rubber
cork gasket D.
(cont.)