Firing Rates; Test Boiler - Riello 20122858 Installation, Use And Maintenance Instructions

4.8

Firing rates

The MAXIMUM OUTPUT is chosen from within the continuous
diagram area (Fig. 3).
The MINIMUM OUTPUT should not be less than:
300 kW (DB 1 SM C03) e 570 kW (DB 2 SM C03) as shown in
the diagram (Fig. 3).
250°C
150°C
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.
20118862
Technical description of the burner
50°C
0
300
0 200
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 22.
1395
930 1675
Thermal power
570 1720 2060 2290
Thermal power
In Fig. 4 you can see the diameter and length of the test combus-
tion chamber.
Example:
Output 1500 kW - diameter 80 cm - length 3 m
MODULATING RATIO
The modulating ratio, obtained in the test boilers in accordance
with current standards (EN 676 for gas), is 1:5.
10 GB
20123538
kW
1860
20119371
kW
D2448
Fig. 3
Fig. 4