6 720 611 451 GB (03.11)
Converting the appliance to different gas types
31
7 Converting the appliance to
different gas types
The setting is factory sealed at maximum. Adjustment to
the rated heat input and min. heat input is not neces-
sary.
Checking the gas supply pressure
B Check the gas supply pressure at the gas supply
pressure testing point.
Natural gas
•Appliances for natural gas type G20 are factory set
to Wobbe-Index 15 kWh/m
3
and 20 mbar supply
pressure and sealed.
7.1 Setting the gas/air ratio
The gas/air ratio may only be adjusted on the
basis of a CO
2
measurement at max. heat output
and min. heat output using an electronic tester.
B Switch off the appliance at the master switch (O).
B Remove the outer case (see page 15, refer to
fig. 13).
B Switch on the appliance at the master switch (I).
B Unscrew sealing plug from flue gas testing
point (234). Refer to fig. 43.
B Insert testing probe about 135 mm into the flue gas
testing point and seal testing point.
Fig. 43
B Press and hold button until the display shows ––.
The button will light up.
Fig. 44
B Turn the temperature control until the display
shows 2.0 .
After a short delay, the current operating mode set-
ting will be displayed (0. = Normal mode).
Fig. 45
i
Natural gas appliances must not be oper-
ated if the gas supply pressure is below
18 mbar or above 24 mbar.
LPG appliances must not be operated if
the supply pressure is below or above
37 mbar.
6 720 610 599 - 01.TD
234
6 720 610 332-32.1O
6 720 610 332-60.1O
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