2126
2
GB
FIRING RATE
COMMERCIAL BOILERS
The burner-boiler matching is assured if the boiler is according to EN 303 and the combustion
chamber dimensions are similar to those shown in the diagram EN 676.
For applications where the boiler is not according to EN 303, or where the combustion chamber
dimensions differ from those shown in EN 676, please consult the manufacturers.
CORRELATION BETWEEN GAS PRESSURE AND BURNER OUTPUT
To obtain the maximum output, a gas head pressure of 11.5 mbar is measured with the combus-
tion chamber at 0 mbar using gas G20 with a net heat value of - Pci = 8600 kcal/m
3
.
Pre
ssure in
the comb
ustion
cha
mber – mb
ar
Burner output
0,8
0
0,2
0,4
0,6
30.000
40.000
50.000
60.000
kcal/h
30
50
40
70
80
kW
D5833
1,0
90
80.000
1,2
60
100
70.000
Gas p
res
sure - mba
r
Burner output
4
6
8
10
30.000
40.000
50.000
60.000
kcal/h
30
50
40
70
80
kW
D5834
14
90
80.000
60
100
70.000
12
