T
HERMO
90 / 90 S
9REPAIR
9-9
9.2.7 Replacement of Burner Head
9.2.7.1 Removal
1. Remove heater (see 8.7.1.1).
2. Remove combustion air fan (see 9.2.5.1).
3. Remove burner, flame sensor and glow pin
(see 9.2.5.1).
4. Remove attachment screw of V-clamp (2, Fig. 9-6)
and pull off clamp.
5. Withdraw burner head (1) from heat exchanger (3)
and remove.
6. Perform procedures on components after
disassembly (see 9.1.1).
NOTE:
Carefully inspect the gasket located at the joint between
the alloy burner head and stainless steel burner tube
especially at the area of the exhaust outlet. Any
deterioration of this gasket will require the replacement of
the burner head/tube assembly.
NOTE:
One of the newer models of Thermo 90 shown.
Older models have the cable of the temperature limiter
located on the side. Illustration is also applicable to the
Thermo 90 S.
9.2.7.2 Installation
NOTE:
Burner head and exhaust outlet pipe can still be aligned
during installation in vehicle.
1. Insert burner head (1, Fig. 9-6) into heat exchanger
(3), align as necessary and secure with V-clamp (2).
2. Torque attachment screw of V-clamp to 3 Nm ± 10%
as required.
3. Install burner, flame sensor, and glow pin
(see 9.2.6.2).
4. Install combustion air fan (see 9.2.5.2).
5. Install heater (see 8.7.1.2).
Fig. 9-6 Replacement of Burner Head
