3217
3
GB
2.3
FIRING RATE
(as EN 676)
TEST BOILER
The firing rate has been defined according to EN 676 standard.
COMMERCIAL BOILERS
The burner-boiler matching is assured if the boiler is according to EN 303 and the combustion chamber dimen-
sions are similar to those shown in the diagram EN 676.For applications where the boiler is not according to EN
303, or where the combustion chamber dimensions differ from those shown in EN 676, please consult the man-
ufacturers.
CORRELATION BETWEEN GAS PRESSURE AND BURNER OUTPUT
To obtain the maximum output, a gas head pressure of 5 mbar is measured (
M3
, see chapter 3.4, page 6) with
the combustion chamber at 0 mbar using gas G20 with a net heat value of 9.45 kWh/m
3
(8,127 kcal/m
3
).
Thermal power
P
res
s
ur
e
in
th
e
co
m
bu
s
ti
on
ch
am
ber
-
mba
r
kW
kcal/h
D4617
kW
kcal/h
D4207
Ga
s pr
es
su
re in
t
h
e
co
mbu
s
ti
on
he
ad –
mb
ar
Thermal power
ATC
ROC
