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4.6
Firing rate
The burner output is chosen from within the diagram area
(Fig. 2).
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
40
4.6.1
Test boiler
The firing rate has been defined according to EN 676 standard.
4.6.2
Commercial boilers
The burner-boiler matching is assured if the boiler conforms to
EN 303 and the combustion chamber dimensions are similar to
those shown in the diagram EN 676.
4.7
Correlation between gas pressure and burner output
To obtain the maximum burner output (Fig. 3), 5.8 mbar meas-
ured at the pipe coupling are needed (M2, Fig. 15 on page 17)
with the combustion chamber at 0 mbar and gas G20 - Ncv = 10
3
3
kWh/Nm
(8,570 kcal/Nm
).
7
6
5
4
3
2
1
40
Technical description of the burner
50
60
40,000
50,000
60,000
50
60
40,000
50,000
60,000
WARNING
70
80
90
80,000
70,000
Thermal power
For applications where the boiler does not conform to EN 303, or
where the combustion chamber is much smaller than the dimen-
sions given in EN 676, please consult the manufacturers.
70
80
90
80,000
70,000
Thermal power
9
GB
The firing rate value (Fig. 2) has been obtained
considering an ambient temperature of 20°C, an
atmospheric pressure of 1013 mbar (approx. 0 m
above sea level), and with the combustion head
adjusted as shown on page 16.
D5256
100
110
120 kW
90,000
100,000
D5257
100
110
120 kW
90,000
100,000
kcal/h
Fig. 2
kcal/h
Fig. 3
20063710
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