Baxi Barcelona Installation And Servicing Instructions page 33

13.0 Changing Components – page 33
The burner and heat exchanger can be changed after
removal of the combustion box door. To change the
heat exchanger, the fan and burner must be removed
first (see section 13.9).
1. Remove the combustion box door by removing the four
securing screws (Fig. 60).
IMPORTANT: On refitting the combustion box door check
the condition of the combustion box door seals.
13.13 Burner (Fig 61)
WARNING: The burner skin is fragile:
Handle with care
1. Remove the two screws securing the burner to the
base of the combustion box.
2. Remove the burner carefully from the combustion box
base.
3. Fit the new burner and reassemble in reverse order.
13.14 Heat Exchanger
1. Drain the boiler (see section 13.1 paragraph 2 & 3).
2. Remove all components in the base of the airbox.
3. Undo the screws on the support bracket. Remove the
screws securing the flow switch and return connections
and remove the connections (Fig. 64).
4. Remove the electrical connections from the P.C.B.s
(see section 13.5 & 13.6).
5. Loosen the two screws securing the electrical box
mounting plate and remove the assembly (Fig. 62).
6. Remove the screws securing the heat exchanger
manifold and remove the manifold (Fig. 63).
7. Lift the heat exchanger assembly and rotate the bottom
upwards whilst pulling it forwards out of the airbox.
8. Fit the new heat exchanger and reassemble in reverse
order.
9. Recommission the boiler and check the inhibitor
concentration (see Section 6.2 and 10.1).