SERVICING AND SPARES
6 720 803 599 (2012/06)
43
3. Remove air/gas manifold (I)
Fig. 63 Air/gas manifold
4. Open air/gas manifold (I).
B
Carefully withdraw diaphragm (J) from fan intake tube and check for
soiling and splits.
Fig. 64 Diaphragm
15. BURNER
B
Remove the burner (H).
B
Replace new burner in correct position.
B
Ensure that a new seal (K) is used, refer to fig. 64.
Fig. 65 Burner removal
16. HEAT EXCHANGER
B
Isolate flow and return valves and drain the boiler.
B
Remove condensate trap (see page 41).
B
Remove fan assembly (see page 42).
1. Remove plastic nut (A) from the base of the inner casing
Fig. 66 Heat exchanger removal 1
2. Remove return pipe at the bottom of heat exchanger.
Fig. 67 Heat exchanger removal 2
3. Remove screw at the top of the heat exchanger (C).
B
Unscrew the flow pipe (D).
Fig. 68 Heat exchanger removal 3
4. Undo flue connection (E) from sump (F).
B
Pull flue pipe up.
B
Remove the heat exchanger.
Fig. 69 Heat exchanger removal 4
H
G
E
E
3.
6720647361-65.1W
o
J
I
K
I
4.
6720647361-66.1W
o
6720647361-49.2W
o
H
A
1.
6720647361-67.1Wo
B
2.
6720647361-68.1Wo
8.
C
D
3.
6720647361-69.1Wo
4.
E
F
6720647361-70.1Wo