Technical data

Brazilia F5, F5S & F8S Baxi Heating Ltd.
14
7.0 Changing Components – Page 14
7.4 Burner
1. Undo the heat exchanger retaining nuts and washers and
draw the casting forwards off the locating studs (Fig. 24).
2. Remove the three screws holding the burner retaining
plate to the airbox, also remove the insulation and undo the
thermocouple nut from the gas tap (Fig. 25 & 27).
3. Ease the thermocouple and electrode lead from the
rubber grommet (Fig. 26).
4. Disengage the burner from the injector and pull the
electrode lead off the spark electrode (Fig. 25).
5. Remove the intake gauze from the burner inlet and undo
the screws securing the burner to its’ retaining plate, noting
the position of the shield at the left hand side (Fig. 25).
6. Undo the screw securing the spark electrode to the
burner. Fit the electrode to the new burner (Fig. 25).
7. Fit the intake gauze to the burner inlet ensuring that it
covers the primary aeration hole
(Fig. 25).
8. Reassemble in reverse order of dismantling.
7.5 Injector
1. Remove the burner as described in sections
7.4.1 to 7.4.4.
2. Undo the injector and sealing washer, retaining the
washer for use with the new injector. If the washer is
damaged it must be replaced.(Fig. 27).
3. Reassemble in reverse order of dismantling.
7.6 Thermocouple
1. Remove the burner as described in sections
7.4.1 to 7.4.4.
2. Undo the nut retaining the thermocouple tip to the burner
bracket and withdraw the thermocouple (Fig. 25).
3. Bend the new thermocouple in a similar manner to the
one removed. Avoid any sharp bends.
4. On reassembly ensure that the airbox sealing grommet is
correctly positioned.