Replacement Of Burner, Flame Sensor And Glow Pin; Removal; Installation - Webasto Thermo 90 Workshop Manual

T 90 / 90 S
HERMO
9.2.6 Replacement of Burner, Flame Sensor
and Glow Pin

9.2.6.1 Removal

1. Remove heater (see 8.7.1.1).
2. Remove combustion air fan (see 9.2.5.1).
3. Remove screw (5, Fig. 9-5) and washer (4).
4. Remove nuts (10) and withdraw bracket.
5. Withdraw grommets (11 and 12) from slots in
housing of combustion tube (3).
6. Withdraw grommet (13) and burner (1) from burner
(1) and remove.
7. Pull flame sensor (7) and glow pin (6) out of burner
(1) and remove.
8. Perform burner visual inspection for assessment of
condition (see 9.1.1).
9. Perform procedures on components after
disassembly (see 9.1.1).

9.2.6.2 Installation

1. Locate swirl ring (2, Fig. 9-5) on burner (1).
2. Carefully and fully insert flame sensor (7) and glow
pin (6) into burner against stops and slide grommets
(11 and 12) down slots in housing of combustion
tube (3).
3. Position burner (1) and grommet (13) in burner
head (3).
CAUTION
When performing the following step, ensure that cables
of flame sensor (7) and glow pin (6) are routed as shown
in figure.
4. Slide insulation (9) onto bracket and locate bracket
(8) in assembly position.
Route cables of flame sensor and glow pin as shown in
figure above.
5. Secure bracket (8) using nuts (10). Torque nuts to
3 Nm ± 10%.
6. Secure fuel line with screw (5) and washer (4).
Torque screw to 3 Nm ± 10%
7. Mount combustion air fan (see 9.2.4.2).
8. Make electrical connections (see 9.2.1.2).
9. Install heater (see 8.7.1.2).
9 R
EPAIR
NOTE:
9-7