Firing Rate; Test Boiler; Commercial Boilers; Correlation Between Gas Pressure And Burner Output - Riello 40 FS8 Installation, Use And Maintenance Instructions

4.6

Firing rate

The burner output is chosen from within the diagram area
(Fig. 2).
1.2
1.0
0.8
0.6
0.4
0.2
0
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 output (Fig. 3), it is necessary to have 4.6
mbar measured on the pipe coupling, with the combustion cham-
6
5
4
3
2
1
Technical description of the burner
45 55
40,000 50,000
45 55
40,000 50,000
The firing rate value (Fig. 2) has been obtained
considering an ambient temperature of 20°C, an
atmospheric pressure of 1013 mbar (approx. 0m
above sea level), and with the combustion head
WARNING
adjusted as shown on page 15.
65 75
60,000 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.
ber at 0 mbar and gas G20 - NCV = 10 kWh/Nm
3
Nm ).
65 75
60,000 70,000
Thermal power
9
GB
D5055
85 95 kW
80,000 kcal/h
D5056
85 95 kW
80,000 kcal/h
Fig. 2
3
(8,570 kcal/
Fig. 3
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