Thermo 90 S / Thermo 90 ST 9Repair
909
9.2.7 Changing the burner head
9.2.7.1 Removal
1. Remove the heater (see 8.7.1.1).
2. Remove the combustion air fan (see 9.2.5.1).
3. Remove the burner, flame monitor and glow plug
(see 9.2.6.1).
4. Remove the mounting screw of the V-clamping collar
(2, Fig. 906) and pull off the clamping collar.
5. Pull out and remove the burner head (1) from the heat
exchanger (3).
6. Complete the work on stripped-down components
(see 9.1.1).
9.2.7.2 Installation
NOTE
The burner head and exhaust outlet port can also be
aligned during installation in the vehicle.
1. Guide the burner head (1, Fig. 906) into the heat
exchanger (3), align it if necessary and secure with
the V-clamping collar (2).
2. If necessary, tighten the mounting screw of the
V-clamping collar to 3 Nm ±10%.
3. Install the burner, flame monitor and glow plug
(see 9.2.6.2).
4. Fit the combustion air fan (see 9.2.5.2).
5. Install the heater (see 8.7.1.2).
Fig. 906 Changing the burner head
1 Burner head
2 V-clamping collar
3 Heat exchanger
1
2
3
NOTE
A Thermo 90 ST heater is shown.
The figure can also be used for the
Thermo 90 S heater.
