Worcester 29CDi Classic Installation, Commissioning And Servicing Instructions page 47

15. BURNER
▶ Remove the burner (H).
▶ Replace new burner in correct position.
▶ Ensure that a new seal (K) is used, refer to fig. 84.
Fig. 85 Burner removal
16. HEAT EXCHANGER
▶ Isolate flow and return valves and drain the boiler.
▶ Remove condensate trap (see page 45).
▶ Remove fan assembly (see page 45).
1. Remove plastic nut (A) from the base of the inner casing
1.
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Fig. 86 Heat exchanger removal 1
2. Remove return pipe at the bottom of heat exchanger.
2.
B
Fig. 87 Heat exchanger removal 2
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H
A
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3. Remove screw at the top of the heat exchanger (C).
▶ Unscrew the flow pipe (D).
C
D
3.
8.
Fig. 88 Heat exchanger removal 3
4. Undo flue connection (E) from sump (F).
▶ Pull flue pipe up.
▶ Remove the heat exchanger.
4.
E
F
Fig. 89 Heat exchanger removal 4
17. DIVERTER VALVE MOTOR
There is no need to drain the appliance.
▶ Disconnect the electrical connector from the diverter valve motor.
1. Pull the motor assembly (A) towards you.
The assembly will slide free from the valve.
▶ To refit, follow the above in reverse.
In case of problems when refitting the motor: Connect
the electrical connector to the motor and switch the
appliance on. Then the motor goes to the middle position
and you can refit it without difficulty.
A
Fig. 90 Diverter valve motor removal
SERVICING AND SPARES
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1.
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