9Repair DBW 2010 / 2016
919
9.2.20 Replacing nozzle holder
9.2.20.1 Removal
1. Swing away burner head (see 8.5.1).
2. Remove ignition electrodes (see 9.2.14.1).
3. Remove high-pressure nozzle (see 9.2.10.1).
4. If necessary, remove nozzle holder pre-heating unit (see
9.2.11.1).
5. Remove solenoid valve (see 9.2.16.1).
6. Loosen screw fittings on pressure line (16, Fig. 912) and
take off pressure line and remove.
7. Remove screws (23) and take off nozzle holder plate (24).
8. Remove screws (27), take off nozzle holder (15) and
remove.
9. Carry out works on stripped down components (see
9.1.1).
9.2.20.2 Installation
1. Move nozzle holder (15, Fig. 912) into installation posi-
tion and fasten with screws (27).
2. Tighten screws to 5.5 Nm.
3. Move nozzle holder (24 ) into installation position and
fasten with screws (23).
4. Tighten screws to 5.5 Nm.
5. Move pressure line (16) into installation position and
tighten screw fittings to 6 ± 0.6 Nm.
6. Install solenoid valve (see 9.2.16.2).
7. If necessary, install nozzle holder pre-heating unit (see
9.2.11.2).
8. Install high-pressure nozzle (see 9.2.10.2).
9. Install ignition electrodes (see 9.2.14.2).
10. Swing in burner head (see 8.5.1).
9.2.21 Replacing combustion air fan
9.2.21.1 Removal
1. Remove burner head (see 9.2.8.1).
2. Remove motor (see 9.2.9.1).
3. Remove screws (6, Fig. 916) from nozzle holder plate (5).
4. Remove screws (1) and washers (2).
5. Pull motor support (3) off shaft.
6. Remove combustion air fan (4).
7. Carry out works on stripped down components (see
9.1.1).
9.2.21.2 Installation
1. Only DBW 2010/2016:
Check gap at fan impeller (see 9.1.1.4)
2. Move combustion air fan (4, Fig. 916) into assembly posi-
tion and fasten on nozzle holder plate (5) with screws (6).
3. Tighten screws (6) to 5.5 Nm.
4. Fit motor support (3) on shaft and fasten with screws (1)
and washers (2).
5. Tighten screws (1) to 5.5 + 1 Nm.
6. Install motor (see 9.2.9.2).
7. Install burner head (see 9.2.8.2).
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