Firing Rate; Test Boiler - Riello DB 9 SM C03 TC A0 FS1 T250 Installation, Use And Maintenance Instructions

4.8

Firing rate

The MAXIMUM OUTPUT is chosen from within the continuous
diagram area (Fig. 3).
The MINIMUM OUTPUT should never be less than 2500 kW as
shown in the diagram (Fig. 3).
250°C
150°C
50°C
0
250°C
150°C
50°C
0
4.9

Test boiler

The burner/boiler combination does not pose any problems if the
boiler is EC approved and its combustion chamber dimensions
are similar to those indicated in the diagram (Fig. 4).
If the burner must be combined with a boiler that has not been EC
approved and/or its combustion chamber dimensions are clearly
smaller than those indicated in the diagram, consult the manufac-
turer.
The firing rates were set in relation to special test boilers, accord-
ing to EN 676 regulations.
20126064
Technical description of the burner
1500 5000
Thermal power
2500
The firing rate value (Fig. 3) has been obtained
considering an ambient temperature of 20 °C, an
atmospheric pressure of 1013 mbar (approx. 0 m
a.s.l.), and with the combustion head adjusted as
WARNING
shown on page 24.
7150
8600 9500
7500 9400
Thermal power
In Fig. 4 you can see the diameter and length of the test combus-
tion chamber.
Example:
Output 7000 kW - diameter 120 cm - length 6 m
MODULATING RATIO
The modulating ratio, obtained in test boilers, according to the
norm (EN 676 for gas), is 1:5 for light oil and 1:4 for gas.
10 GB
D3976
DB9
kW
DB12
kW
11300 12500
D2448
Fig. 3
Fig. 4