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7.5 Mixing head setting
If the combustion head and the diffuser have heavy soot
deposits, or are very oily internally, the combustion head
settings must be checked. Dimension S1 (distance from
the diffuser to the front edge of the flame tube) can only be
checked when the burner is mounted onto a hinged boiler
door. Otherwise, the nozzle assembly must be removed
(see Ch. 7.6) and dimension L checked instead.
Incorrect setting of the mixing head can lead
to soot and CO formation.
Basic setting
1. Adjust the indicating bolt
➅
by turning the setting
screw
➆
to scale setting 0 (dimension X = 0). The
indicating bolt
➅
must be level with the back plate.
2. Dimension S1 or L must be checked.
If dimensions differ:
1. Set dimension S1 or L by turning the setting screw
➆
.
2. Remove the cap from the end of the indicating bolt
➅
.
3. With SW3 Allen key return the indicating bolt to the
zero position.
4. Refit the cap to the end of the indicating bolt.
Note
Always carry out ratings related settings of
the diffuser with the setting screw. Never turn
the indicating bolt!
Basic setting
Burner
Dims in mm
type
L
X
S1
a
WL10/2-C, vers. Z
276 ± 0·5
0
8·5
3·5
ATTENTION
Setting the mixing head
S1
a
➀
Burner flange
➁
Nozzle assembly
➂
Nozzle
➃
Diffuser
➄
Combustion head
➅
Indicating bolt
➆
Setting screw
➇
Nozzle assembly cover
L
L
X
