Combustion Box
Door Panel
Fig. 55
Burner
Support
Bracket
Return 
Connection
Fig. 57
15.0Changing Components
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 13.6 and 13.10).
1.Remove the combustion box door by removing the four securing screws (Fig. 55).
IMPORTANT: On refitting the combustion box door check the condition of the combustion box door seals.
15.12Burner (Fig. 56)
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.Check the burner seal on the heat exchanger base, replace if necessary. Fit the new burner and reassemble in reverse order.
Fig. 56
Securing Screws |
15.13 Heat Exchanger
| 1. | Drain the boiler (see section 13.1 paragraph 2 & 3). |
Flow |
|
|
Switch | 2. | Remove all components in the base of the airbox. |
Fig. 58
Heat Exchanger
Manifold
Heat Exchanger
Assembly
Fig. 59
© Baxi Heating UK Ltd 2011
3.Undo the screws on the support bracket. Remove the screws securing the flow switch and return connections and remove the connections (Fig. 57).
4.Remove the screws securing the heat exchanger manifold and remove the manifold (Fig. 58).
5.Ease the combustion box left hand side panel to clear the stud, lift the heat exchanger assembly (Fig. 59) and rotate the bottom upwards whilst pulling it forwards out of the airbox.
6.Ensure that the heat exchanger is disengaged from the flue elbow and clear of the stud in the left hand side of the combustion box.
7.Fit the new heat exchanger and reassemble in reverse order.
8.Recommission the boiler and check the inhibitor concentration (see Section 6.2 and 10.1).
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