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2.3 FIRING RATE
D11418
TEST BOILER
The firing rate has been defined according to EN 676 standard.
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.
For applications where the boiler does not conform to EN 303, or where the combustion chamber is much
smaller than the dimensions given in EN 676, please consult the manufacturers.
CORRELATION BETWEEN GAS PRESSURE AND BURNER OUTPUT
To obtain the maximum output, a gas head pressure of 10.5 mbar, is measured (M2, see chapter 3.6, page
7) with the combustion chamber at 0 mbar using gas G20 with a net heat value of 10 kWh/m
12
10
8
6
4
2
0
0
0
20050873
25
100
Thermal power
50
100
50000
Thermal power
150
200
150
100000
150000
4
GB
3
3
(8.570 kcal/m
).
D11136
200
kW
kcal/h
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