20148049
10
GB
Technical description of the burner
4.8
Firing rate
During operation, burner output varies between:
Maximum output,
selected from within area A.
The
minimum output
must not be lower than the minimum
limit of the diagram:
300 kW
4.9
Test boiler
The firing rates were obtained in special test boilers, according to
EN 676 standard.
In Fig. 4 you can see the diameter and length of the test
combustion chamber.
Example:
Output 650 kW - diameter 60 cm
length 2 m
4.10
Commercial boilers
Burners are suitable for operating on both flame inversion boilers
(
*
) as well as on boilers with a combustion chamber with run-off
from the bottom (three flue passes) on which the best results for
low NO
x
emissions are obtained.
The boiler front door maximum thickness must not exceed 250
mm (Fig. 5).
Although combination is guaranteed when boiler has a CE type-
approval, preliminary tests are recommended for boilers or
furnaces having a combustion chamber size much different than
the one specified in the diagram (Fig. 4).
(
*
) For flame inversion boilers, a kit is available to reduce the CO,
if necessary.
ATTENTION
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
shown on page 21.
Fig. 3
Pre
ssu
re i
n
th
e ch
amber
pres
sure -
mbar
D2957
Thermal power -
kW
Fig. 4
Combustion
ch
amber
length -
m
D715
Fig. 5
250 mm MAX
D1079