Firing Rate; Test Boiler - Riello DB 20 SE FGR TC FS1 FB A0 T150 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 not be less than 4.000 kW as
shown in the diagram (Fig. 3).
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.
20136081
Technical description of the burner
4000
Thermal power
10
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
WARNING a.s.l.), and with the combustion head adjusted as
shown on page 23.
12500
In Fig. 4 you can see the diameter and length of the test combus-
tion chamber.
Example:
Output 7000 kW - diameter 120 cm - length 6m
MODULATING RATIO
The modulating ratio, obtained in the test boilers in accordance
with current standards (EN 676 for gas), is 1:4.
GB
S9333
20000 kW
18500
D2448
Fig. 3
Fig. 4