66
Wobbe index ranges
Gas type Wobbe index range
kWh/m
3
MJ/m
3
Delivered condition
Natural gas E
or
12.0 to 16.1 43.2 to 58.0
Natural gas LL 10.0 to 13.1 36.0 to 47.2
Converting the gas type
Replace the gas restrictors on both burn-
ers. The gas restrictors are packed sep-
arately and shipped with the boiler.
Gas restrictor assignment
Gas type Burner Identification Drilled hole
7
mm
Natural gas E Stirling 39 3.9
Auxiliary 37 3.7
Natural gas LL Stirling 44 4.4
Auxiliary 42 4.2
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5618 294 GB
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