Riello 40 GS10/M Installation, Use And Maintenance Instructions page 20

TEST BOILER
The working field 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 man-
ufacturers.
CORRELATION BETWEEN GAS PRESSURE AND BURNER OUTPUT
To obtain the maximum output, a gas head pressure of 4.6 mbar, relatively to type 729T50, is measured with the
combustion chamber at 0 mbar using gas G20 with a net heat value of 10 kWh/Nm
729 T50
5
4
3
2
1
0
10 20
D6221
16,300
730 T50
7
6
5
4
3
2
1
0
40
D6226
30.000 50.000
2622
30 40 50
34,400
60 80 100
70.000 90.000
60 70 80
51,600 68,800
120 140
110.000 130.000
4 GB
3
.
90 100 110 kW
86,000 kcal/h
Thermal power
160 180
150.000 170.000
Thermal power
200
kW
kcal/h