20013756
4
GB
TEST BOILER
The working field has been defined according to EN 676 standard.
COMMERCIAL BOILERS
The burner-boiler matching is assured if the boiler conforms to EN 303 and the combustion chamber dimensions
are similar to those shown in the diagram EN 676. For applications where the boiler does not conform to EN 303,
or where the combustion chamber is much smaller than the dimensions given 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 4.6 mbar, relatively to type 729T50, is measured with the
combustion chamber at 0 mbar using gas G20 with a net heat value of 10 kWh/Nm
3
.
Thermal power
5
kcal/h
kW
4
3
2
D6226
5
4
3
2
1
0
30.000
50.000
70.000
110.000
kcal/h
60
40
80
100
kW
120
170.000
140
160
180
200
90.000
130.000
150.000
6
7
730 T50
729 T50
D6221
16,300
10
1
0
20
30
40
50
60
70
80
90
100
110
34,400
51,600
68,800
86,000
Thermal power
Gas pressure in the
combu
s
ti
on
h
ead
–
mba
r
Gas
p
res
sure
in t
h
e
c
o
mbust
ion hea
d
– mbar
