Converting The Gas Type - Viessmann Vitotwin 300-W Installation And Service Instructions For Contractors

Commissioning, inspection, maintenance
Further details regarding the individual steps
Wobbe index ranges
Gas type
Delivered condition
Natural gas E
or
Natural gas LL

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
Natural gas E Stirling
Auxiliary
Natural gas LL Stirling
Auxiliary
66
Wobbe index range
3
kWh/m
12.0 to 16.1
10.0 to 13.1
Identification
39
37
44
42
(cont.)
3
MJ/m
43.2 to 58.0
36.0 to 47.2
Drilled hole
7 mm
3.9
3.7
4.4
4.2