12
COMBUSTION HEAD-DIFFUSER ADJUSTMENT
The combustion head and the diffuser must be properly adjusted in order to ensure
efficient combustion.
The adjustment values shown below represent average values obtained during testing
to the EN 267 requirements. Depending on the different boiler room conditions, the
combustion values attained by these adjustments may be improved.
The dimensions “b" and “a” are the distance between the nozzle tip and diffuser disc
top surface and the distance between the combustion head edge and diffuser disc top
surface, respectively. They should be adjusted according to the following graphs,
depending on the operating capacity required
a
b
strok
ALM 125/2 90/127 3
37
ALM 174/2 100/137 3
37
ALM 125/2
80
85
90
95
100
105
110
115
120
125
130
40
50
60
70
80
90
100
110
120
130
Capacity (kg/h)
a
C
o
m
b
u
s
ti
o
n
h
e
a
d
-
D
if
fu
s
e
r
A
d
ju
s
tm
e
n
t
(m
m
)
ALM 174/2
90
95
100
105
110
115
120
125
130
135
140
50
60
70
80
90
100
110
120
130
140
150
160
170
180
Capacity (kg/h)
a
C
o
m
b
u
st
io
n
h
ea
d
-
D
if
fu
se
r
A
d
ju
st
m
en
t
(m
m
)
