Technical data

SERVICING AND SPARES
6 720 648 547 (2012/06) 43
15. BURNER
▶ Remove the burner (H).
▶ Replace new burner in correct position.
▶ Ensure that a new seal (K) is used, refer to fig. 70.
Fig. 71 Burner removal
16. HEAT EXCHANGER
▶ Isolate flow and return valves and drain the boiler.
▶ Remove condensate trap (see page 40).
▶ Remove fan assembly (see page 41).
1. Remove plastic nut (A) from the base of the inner casing
Fig. 72 Heat exchanger removal 1
2. Remove return pipe at the bottom of heat exchanger.
Fig. 73 Heat exchanger removal 2
3. Remove screw at the top of the heat exchanger (C).
▶ Unscrew the flow pipe (D).
Fig. 74 Heat exchanger removal 3
4. Undo flue connection (E) from sump (F).
▶ Pull flue pipe up.
▶ Remove the heat exchanger.
Fig. 75 Heat exchanger removal 4
19. DRAIN TAP
▶ Remove clip (G)
▶ Unscrew nut (H)
▶ Replace drain tap.
20. AUTO AIR VENT
▶ Ensure the appliance has been fully drained.
▶ Unscrew air vent (J) and replace.
Fig. 76 Auto Air Vent removal
6720647361-49.2Wo
H
A
1.
B
2.
6720647361-68.1Wo
8.
C
D
3.
6720647361-69.1Wo
4.
E
F
6720647361-70.1Wo
G
H
J
6720648547-36.1Wo