Firing Rate; Test Boiler - Riello DB 12 LSM C13 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
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.
20119307
Technical description of the burner
0
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 27.
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, EN 267 for light oil), is 1:5 for light oil and
1:4 for gas.
10 GB
D3976
DB12
kW
11300 12500
D2448
Fig. 3
Fig. 4