Annual Servicing - Baxi Brazilia F5 Installation And Servicing Instructions

Brazilia F5, F5S & F8S
6.0 Annual Servicing – Page 12
12
Supplied By www.heating spares.co Tel. 0161 620 6677
6.1 Servicing the Appliance
1. For reasons of safety and economy the appliance should be
serviced annually
2. Before servicing please read Section 1.3
Important Information.
3. Turn off the gas supply and ensure that the appliance is cold.
4. Remove the control knob by pulling forward, then remove the
case by easing upwards and forwards until it is clear of its
retaining lugs
(Fig. 13).
5. Undo the heat exchanger retaining nuts and washers (Fig.
14) and draw the casting forwards off the locating studs.
6. Remove the three screws holding the burner retaining plate to
the airbox and undo the thermocouple nut from the gas tap (Fig.
15 & 18).
7. Ease the thermocouple and electrode lead from the rubber
grommet (Fig. 16).
8. Disengage the burner from the injector and pull the electrode
lead off the spark electrode
(Fig. 15).
9. Check that the insulation is undamaged. Replace if
necessary. (8S only - Check that the aluminium foil is
undamaged. Replace if necessary) (Fig. 17).
10. Remove and clean the injector and sealing washer. The
injector must not be cleaned with a needle or wire (Fig. 18). If
the sealing washer is damaged it must be replaced.
11. Check that the flue outlet tube is clear (Fig. 17).
12. Brush away any dirt from the heat exchanger casting. If
necessary clean the viewing window.
13. With a light brush carefully remove deposits from the spark
electrode, burner flame ports and the burner gauze (Fig. 15).
14. Replace the rope seal in the heat exchanger casting if it is
damaged in any way (Fig. 14). Also examine the thermocouple
and replace if necessary.
15. Re-assemble the injector, washer and burner assembly in
reverse order of dismantling. Ensure that the spark gap is
correct ie. 3.5mm ± 0.5mm. Check that the burner is horizontal
and correctly positioned on the injector with the gauze covering
the primary aeration hole.
16. Check the gas pressure at the test point on the gas control
tap. If the pressure is not within the tolerance, (see Section 2.0
Technical Data) the gas supply to the unit needs to be
investigated.
17. Check that the burner ignition is satisfactory. Ensure that the
thermocouple/electrode lead grommet is correctly positioned
and re-fit the heat exchanger casting.
18. Check for gas soundness.
19. Fit the case and control knob and re-check that the ignition
is satisfactory.
Baxi Heating Ltd.