Technical data

12.0 Servicing the Boiler – page 29
12.1 Annual Servicing
Hazardous materials are not used in the construction of
Baxi products, however reasonable care during service is
recommended.
1. For reasons of safety and economy, it is recommended
that the boiler is serviced annually.
2. After servicing, complete the relevant section of the
“Benchmark” Installation, Commissioning and Service
Record Log Book. This should be in the possession of
the user.
3. Whilst the boiler is running measure the CO and CO
2
content of the flue products by removing the RH sample
screw on the flue elbow and insert a suitable sampling
probe (Fig. 42). If the CO/CO
2
ratio is greater than
0.035 then further servicing and investigation is
required.
4. Ensure that the boiler is cool.
5. Ensure that both the gas and electrical supplies to
the boiler are isolated.
6. Remove the outer case and lower door panel (see
Installation, Section 8.3).
7. Release the six ¼ turn screws securing the airbox door
panel and remove the door (Fig. 43).
8. Undo the four screws securing the combustion box
door and remove the door (Fig. 44).
9. Loosen the two lower screws securing the burner to the
injector manifold (Fig. 45).
10. Remove the remaining two upper screws securing the
burner to the injector manifold (Fig. 45).
11. Remove the electrode leads from the electrodes (noting
their positions) and withdraw the burner (Figs 44 & 45).
12. Brush any deposits from the injectors. Do not use a pin
or wire to clean them.
13. Brush the burner blades and venturis and clean the
combustion box.
14. Ensure that the heat exchanger fins are clear of any
obstruction.
15. Reassemble in reverse order of dismantling and
recommission.
16. Check the CO/CO
2
ratio is now less than 0.035.
17. Complete the relevant section of the “Benchmark”
Installation, Commissioning and Service Record Log
Book and hand it back to the user.