8
x
Inspection and maintenance
59
FA ROTEX A1 BO - 10/2007
8.2.8 Replacing the oil nozzle and ignition electrodes
Requirement:
Burner is in service position (see chapter 6.4).
Removing oil nozzles
1.
Pull out ignition cables from ignition electrodes (fig. 8-18, pos. a).
2.
Loosen fixing screws (fig. 8-18, pos. c) and pull out mixing device upwards.
3.
Unscrew nozzles with wrench or ring spanner SW 16. Hold back the nozzle rod with an open-end wrench SW 16.
Replacing ignition electrodes
Fitting oil nozzle
1.
Screw in the oil nozzle with open end or ring spanner SW 16 on the nozzle rod. Hold back the nozzle rod with an open-end
wrench SW 16.
2.
Fitting mixing device. Thereby, position the light tube (fig. 8-18, pos. d) between the guide pins in the nozzle lid
(see fig. 6-2, pos. 23). Maintain oil-air nozzle distance (Dimension "Y") (see tab. 6-1, chapter 6.3).
3.
Plug on ignition cable on the ignition electrodes.
WARNING!
Danger of burning on hot surfaces.
• Before starting work on burners and combustion chamber, allow them to cool down sufficiently.
• Wear protective gloves.
a
Mixing unit
b
Ignition electrodes
c
Fixing screw
d
Light tube
g
Nozzle rod
(oil preheater)
Fig. 8-18 Mixing head and ignition electrodes
If the LE membrane valve (fig. 6-13, page 47) is clogged and needs to be changed, it can be pulled out after
unscrewing the oil nozzle from the nozzle holder of the oil preheater by using a
M5
screw.
If the ignition electrodes are worn out, they must be replaced.
• Loosen fixing screw with Allan key SW 3.
• Replacing ignition electrodes
• Tighten fixing screw with Allan key SW 3.
Fig. 8-19 Fixing screw for the ignition electrodes
To protect the oil pump and LE membrane valve, either insert the enclosed micro-replacement filter insert
MC-7
, (
15 60 13
) for short filter cups or the
MC-18
, (
15 60 14
) for long filter cups in the ventilation
oil filters. Only use filters of maximum 25 µm.
