Thermo 90 S / Thermo 90 ST 9Repair
907
9.2.6 Changing the burner, flame monitor and
glow plug
9.2.6.1 Removal
1. Remove the heater (see 8.7.1.1).
2. Remove the combustion air fan (see 9.2.5.1).
3. Remove the screw (5, Fig. 905) and washer (4).
4. Remove the nuts (10) and pull off the bar (8).
5. Pull the grommets (11 and 12) out of the slots in the
housing of the combustion pipe (3).
6. Pull the grommet (13) and burner (1) out of the burner
head and remove with the swirl orifice (2).
7. Pull the flame monitor (7) and glow plug (6) from the
burner (1) and remove.
8. Perform a visual check for assessing the burner
(see 5.3).
9. Complete the work on stripped-down components
(see 9.1.1).
9.2.6.2 Installation
1. Place the swirl orifice (2, Fig. 905) onto the burner (1).
2. Carefully insert the flame monitor (7) and glow plug (6)
into the burner up to the stop and push the grommets
(11 and 12) into the slots in the housing of the burner
pipe (3).
3. Insert the burner (1) and grommet (13) into the burner
head (3).
CAUTION
During the following procedure, make sure that the
cables of the flame monitor (7) and the glow plug (6)
are routed as shown in the figure.
4. Push the insulation (9) onto the bar (8) and bring the
bar into the assembly position.
NOTE
Route the cable of the flame monitor and the glow plug
as shown in the figure!
5. Secure the bar (8) using the nuts (10). Tighten the
nuts to 3 Nm ±10%.
6. Secure the fuel line using the screw (5) and
washer (4). Tighten the screw to 3 Nm ±10%.
7. Fit the combustion air fan (see 9.2.5.2).
8. Connect the electrical connections (see 9.2.1.2).
9. Install the heater (see 8.7.1.2).
Glow plug
Flame monitor
