Firing Rates; Test Boiler - Riello DB 20 SM HS C03 TC A0 FS1 FB T150 Installation, Use And Maintenance Instructions

4.6

Firing rates

The MAXIMUM OUTPUT is chosen from within the continuous
diagram area (Fig. 1).
The MINIMUM OUTPUT should not be less than 4000 kW as
shown in the diagram (Fig. 1).
150° C
50° C
0
4.7

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. 2).
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.
Technical description of the burner
4000
The firing rate value (Fig. 1) 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 21.
12500
Thermal power
In Fig. 2 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 1:5.
9 GB
S9333
18500 20000
Fig. 1
D2448
Fig. 2
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