Replacement Of Combustion Air Fan - Webasto Thermo 90 Workshop Manual

9 Repair

9.2.5 Replacement of Combustion Air Fan

9.2.5.1 Removal
1. Remove heater (see 8.7.1.1).
2. Disconnect electrical connections (see 9.2.1.1).
3. Remove screws (2, Fig. 904).
4. Pull combustion air fan (1) from burner head (4) and
remove together with profiled packing ring (3).
On heater Thermo 90 S with flanged control unit
remove control unit as required.
5. Perform procedures on components after
disassembly (see 9.1.1).
Thermo 90 S
Control Unit
1 Combustion Air Fan
2 Screw (2)
3 Profiled Packing Ring
4 Burner Head
906
NOTE
2
3
1
Fig. 904 Replacement of Combustion Air Fan
9.2.5.2 Installation
Locate packing ring (3, Fig. 904) properly; do not
squeeze.
1. Bring combustion air fan (1) with new profiled
packing ring (3) in assembly position and secure with
screws (2).
2. Torque tighten screws (2) with 3 Nm ± 10%.
On heater Thermo 90 S with flanged control unit install
control unit as required.
3. Make electrical connections (see 9.2.1.2).
4. Install heater (see 8.7.1.2).
1
4
One of the newer models Thermo 90 shown.
Older models have the cable of the
temperature limiter located on the side.
Thermo 90
NOTE
NOTE
NOTE