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4.8
Firing rates
MAXIMUM OUTPUT must be selected in the hatched area of the
diagram (Fig. 3).
MINIMUM OUTPUT must not be lower than the minimum limit
shown in the diagram.
22
20
18
16
14
12
10
8
6
4
2
0
400
4.9
Test boiler
The burner/boiler matching does not pose any problems if the
boiler is CE type-approved and its combustion chamber dimen-
sions are similar to those indicated in diagram (Fig. 4).
If the burner must be combined with a boiler that has not been CE
type-approved and/or its combustion chamber dimensions are
clearly smaller than those indicated in diagram (Fig. 4), consult
the manufacturer.
The firing rates were set in relation to special test boilers, accord-
ing to EN 676 regulations.
20027766
Technical description of the burner
1200
2000
2800
Thermal output - kW
The firing rate area values (Fig. 3) have been ob-
tained considering a surrounding temperature of
20 °C, and an atmospheric pressure of 1013 mbar
WARNING
(approx. 0 m above sea level) and with the com-
bustion head adjusted as shown on page 20.
3600
4400
5200
Fig. 4 indicates the diameter and length of the test combustion
chamber.
Example:
Output 3000 kW
diameter 100 cm
length 4 m
MODULATION RATIO
The modulation ratio, determined using test boilers according to
standard (EN 676 for gas, EN 267 for light oil), is 2.5 : 1.
10
GB
D10528
Class 3 EN676
Class 1 EN267
Class 3 EN676
Class 2 EN267
6000
6800
7600
D1637
Fig. 3
Fig. 4
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