Bentone BG 650, Installation And Maintenance Instruction

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27 Bentone
Lower heat value Hu at normal state 15°C and 1013.25 mbar EN676
Grade of gas kWh/Nm 3 MJ/Nm 3 kcal/Nm 3
Natural gas G20 9.5 34.02 8126
Natural gas G25 8.2 29.25 6986
Propane G31 24.6 88.00 21019
Butane G30 32.5 116.09 27728
5.5 Recommended excess air when
using default setting
Grade of gas Excess air flue gases Max. % CO
2
% O
2
% CO
2
Lambda 1.2
Natural gas 3–5 ≈10 11.9
Propane 3–5 ≈11.5 13.9
Butane 3–5 ≈11,5 14,1
Liquefied petroleum
gas (LPG) 3–5 ≈11 13,8
5.6 Determining the gas quantity for
the system
The heat values indicated are normal values; the heat value varies according
to the origin of the gas. For more exact information on values, contact the
gas distributor.
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