50
Draw-out and Swing Mechanism
Burner Settings
Draw-out and swing mechanism
The duobloc burners type RPD are
equipped with a draw-out and swing
mechanism. This makes it possible to
pull out and swing away the complete
central tube for maintenance access to
the mixing head and for adjusting the
mixing and ignition units.
Prior to this, the fastening bolts of the
central tube must be unscrewed. The
baseplate of the central tube carries the
ignition burner, flame detector, nozzle
rod assembly (only for oil and dual-fuel
burners) and primary air connection.
After the central tube has been remo-
ved, the air damper in the burner hou-
sing will also be accessible.
NOTE:
Before removing and swinging
away the central tube take care to
mount the draw-out and swing mecha-
nism, disconnect the electric plug con-
nectors of the flame detector and
ignition burner, remove the primary air
connection and disconnect the oil hoses
(in oil and dual-fuel burners) with the
quick-action couplings provided for this
purpose.
Burner head adjustments
Burner combustion head
adjustments
In order to enable service work on the
burner combustion head and for adjust-
ments of the ignition system the com-
plete burner insert can be removed (see
burner hinge arrangement). In case of
component replacements or service
work on the components of the burner
head the correct position of the burner
head components have to checked and
if necessary the appropriate adjust-
ments have to be carried out.
The correct measurements can be seen
in the burner dimensional sheet.
The ignition electrodes must be set
according to the dimensions shown in
the diagramm.
As the spray pattern of the oil nozzle
depend on nozzle size the given dimen-
sions can only be approximations. It
may be necessary for the commission-
ing engineer to alter the base settings to
achieve the best start performance. The
distance between nozzle tip and turbu-
lator face depends on the nozzle spray
pattern and the size of the turbulator
core hole. The distance has to be adju-
sted by the commissioning engineer so
that the oil cone will impinge on the tur-
bulator.
The works setting of the burner head is
carried out as shown in the dimensional
sheet. In the base setting the nozzle
face is positioned flush with the turbula-
tor inner hole i.e. setting "0".
It is recommended to note the distance
between nozzle rod positioning bush
and the end of the protruding nozzle rod
as reference position.
Burner combustion head
1 Burner
tube
2 Flame
tube
3
Cylinder for air stabilization
4 Ignition
Burner
5 Turbulator
6 Nozzle
7 Primary
air
duct
8 Gas
nozzle
9 Gas
lances