PART I: SPECIFICATIONS
11
Data are referred to standard conditions: atmospheric pressure at 1013mbar, ambient temperature at 15° C
NOTE:
The performance curve is a diagram that represents the burner performance in the type approval phase or in the laboratory tests, but does not represent the
regulation range of the machine. On this diagram the maximum output point is usually reached by adjsuting the combustion head to its “MAX” position (see paragraph
“Adjusting the combustion head”); the minimum output point is reached setting the combustion head to its “MIN” position. During the first ignition, the combustion head is set
in order to find a compromise between the burner output and the generator specifications, that is why the minimum output may be different from the Performance curve
minimum
Pressure in the Network / gas flow rate curves
Performance Curves
GAS PRESSURE
mbar
G258A MG
Stm
3
/h
G335A MG
Stm
3
/h
GAS PRESS
URE
mbar
G380A MG
Stm
3
/h
G400A MG
Stm
3
/h
ATTENTION: the gas rate value is quoted on the x-axis, the related network pressure is quoted on the y-axis
(pressure value in the combustion chamber is not included). To know the minimum pressure at the gas train inlet,
necessary to get the requested gas rate, add the pressure value in the combustion chamber to the value read on
the y-axis.
The values in the diagrams refer to
natural gas
with a calorific value of 8125 kcal/Stm
3
(15°C, 1013 mbar) and a density of
0.714 kg/Stm
3
.
The values in the diagrams refer to
GPL
with a calorific value of 22300 kcal/Stm
3
(15°C, 1013 mbar) and a density of 2.14 kg/
Stm
3
. When the calorific value and the density change, the pressure values should be adjusted accordingly.
Where:
Natural gas pressure shown in diagram
Real gas pressure
Natural gas flow rate shown in diagram
Real gas flow rate
Natural gas density shown in diagram
Real gas density
Summary of Contents for G335A
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Page 57: ...Service manual AZL2x LMV2x 3x Burner Management System M12916CD Rev 3 4 03 2023...
Page 64: ...8 Parameters level heating engineer...
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