Gas type conversion | 75
6 720 643 068 (2011/06)Copyright (optional information)
11 Gas type conversion
The gas-air ratio must always be set on the basis of a CO
2
or O
2
reading taken at maximum nominal output and
minimum nominal output using an electronic flue gas
analyzer.
Adjustment to different flue systems using throttle discs or
baffles is not necessary.
NG
• Appliances are set at the factory to Wobbe index
1,333 BTU/ft
3
(49.6 MJ/m
3
) at 60 °F (15 °C), 30" Hg
(1016 hPa)
and 7.0" W.C. (17.4 mbar) gas supply
pressure and sealed.
11.1 Converting to a different gas type
A gas conversion kit is included in the scope of delivery.
B Fold the Heatronic down.
B Check the number on the code plug from the gas
conversion kit (Code plug number Æ table 42, page 96).
B Replace the code plug in the Heatronic with the code
plug from the gas conversion kit.
Fig. 67 Replacing the code plug
B Affix the gas type label from the gas conversion kit to
the appliance.
Fig. 68 Affixing the gas type label
B Always adjust the gas-air ratio (CO
2
or O
2
,
Æ Section 11.3) after converting to a different gas type
and measure the CO content of the flue gas
(Æ Section 12).
DANGER: Personal injury and property
damage
B This conversion shall only be performed by
a trained and certified installer in
accordance with the manufacturer‘s
instructions and all applicable codes and
requirements of the authority having
jurisdiction.
B If the information in these instructions is
not followed exactly, or the installation,
adjustment, modification, operation or
maintenance is carried out by an
unqualified person, a fire, explosion or
generation of large amounts of carbon
monoxide may result causing property
damage, personal injury or loss of life.
B Before carrying out electrical work:
Disconnect the installation from the power
supply at the emergency shutoff switch or
by disengaging the heating system circuit
breaker. Take measures to prevent
accidental reconnection.
B The installer is responsible for the proper
conversion of this appliance.
B The conversion is not complete until the
operation of the converted appliance is
checked as specified in these instructions.
DANGER: Explosion!
B Close the gas cock prior to working on the
gas train.
B Check for gas leaks after carrying out work
on the gas train.
6 720 641 933-57.1O
6 720 641 933-58.1O
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