Repair manual

9.2.7 Replacement of Burner Insert,
Combustion Tube, and Heat Exchanger
9.2.7.1 Removal
1. Remove air heater (see 8.7.1.1).
2. Remove control unit (see 8.7.2.1).
3. Remove combustion air fan (see 9.2.4.1).
4. Remove flame sensor (see 9.2.5.1).
5. Remove glow plug (see 9.2.6.1).
CAUTION
When performing the following step ensure that fuel
connection is not bent.
6. Remove burner insert (5, Fig. 904).
7. Withdraw combustion tube (6) from heat exchanger
(8) and remove gasket.
8. If the heat exchanger is to be replaced remove lock-
washers (4, Fig. 815) and pull off temperature limiter
(5).
9. Perform work on components after disassembly (see
9.1.1).
9.2.7.2 Installation
1. In case a new heat exchanger is fitted, secure tem-
perature limiter (5, Fig. 815) with lock washers (4).
2. Fit new gasket (7, Fig. 904).
3. Bring combustion tube (6) in assembly position.
NOTE
The burner insert will be secured when installing flame
sensor and glow plug.
CAUTION
When performing the following step ensure that the fuel
connection is not bent.
4. Install glow plug (see 9.2.6.2).
5. Install flame sensor (see 9.2.5.2).
6. Mount combustion air fan (see 9.2.4.2).
7. Install control unit (see 8.7.2.2).
8. Install air heater (see 8.7.1.2).
909
Air Top 2000 9 Repair