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PART I: SPECIFICATIONS
How to read the burner "Performance curve"
To check if the burner is suitable for the boiler to which it must be instal-
lled, the following parameters are needed:
furnace input, in kW or kcal/h (kW = kcal/h/860);
backpressure (data are available on the boiler ID plate or in the
user's manual).
Example:
Furnace input: 600kW
Backpressure: 4 mbar
In the "Performance curve" diagram, draw a vertical line matching the
furnace input value and an horizontal line matching the backpressure
value. The burner is suitable if the intersection point A is inside the per-
formance curve.
Data are referred to standard conditions: atmospheric pressure at 1013
mbar, ambient temperature at 15° C.
Checking the proper gas train size
To check the proper gas train size, it is necessary to the available
gas pressure value upstream the burner's gas valve. Then subtract
the backpressure. The result is called pgas. Draw a vertical line
matching the furnace input value (600kW, in the example), quoted
on the x-axis, as far as intercepitng the network pressure curve,
according to the installed gas train (DN65, in the example). From the
interception point, draw an horizontal line as far as matching, on the
y-axis, the value of pressure necessary to get the requested furnace
input. This value must be lower or equal to the pgas value, calcula-
ted before.
To get the input in kcal/h, multiply value in kW by 860.
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
Tipo P60 Mod. M-xx.x.IT.A.0.50 - M-.xx.x.IT.A.0.65
8
7
6
5
4
3
2
1
0
-1
100
200
300
25
20
15
10
5
0
100
200
300
10
Campo di lavoro bruciatori
A
400
500
600
700
Power kW
Potenza kW
Rp 2" (50)
DN65
DN65
400
500
600
700
800
Power kW
Potenza / Output (kW)
800
900
900
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