11
20135737
GB
Technical description of the burner
4.7
Firing rates
The burner output is chosen from within the diagram area (Fig. 3
and Fig. 4).
WARNING
The firing rates (Fig. 3 and Fig. 4) were obtained
at an ambient temperature of 20 °C, at a baromet-
ric pressure of 1013 mbar (about 0 m a.s.l.) and
with the combustion head regulated as indicated
on page 18.
WARNING
Only for the BS4D model
To ensure operation with a burner output from 220
249 kW, remove the pre-cut soundproofing to
free the additional air input slots on the cover (see
A
Fig. 4).
S7025
Fig. 2
Heat output
kW
0
0,2
0,4
0,6
0,8
1,00
1,20
1,40
1,60
1,80
2,00
2,20
2,40
55
50
45
40
35
30
25
20
15
10
-0,2
-0,4
BS1D
20141027
kW
Heat output
30
35
0
0,4
0,8
-0,4
1,2
40
45
50
55
60
65
70
75
80
85
90
95
1,6
2
2,4
2,8
Fig. 3
20141033
BS2D
Pre
ssure in th
e combustion
chambe
r –
mba
r
Pressure in the com
b
ustion
ch
amber – mbar
