Grant Vortex Outdoor Module - Cleaning the Burner Assembly

32
Grant Vortex Outdoor Module
8 - BOILER SERVICING
Fig. 22
4 ± 0.3 mm
3 to 3.5 mm
Clamp screw
Cleaning the burner
8.4
See Section 12
1 Combustion head - Loosen the two screws
securing the combustion head and withdraw the
head. Clean and refit the combustion head.
2 Inspect the ignition electrodes - Remove the
combustion head.
Loosen the electrode clamp screw and withdraw
the electrode assembly. Wipe clean and check for
any cracks in the ceramic insulation. Replace if
necessary.
Check the electrode settings
Electrode tips approximately 4 mm apart and 3 to
3.5 mm in front of the nozzle, see Fig 22.
3 Nozzle - The nozzle must be replace annually. Check
that the nozzle size and type are correct, refer to table
in Section 3.3 and boiler data label. Clean the nozzle
with kerosene if necessary. Do not use a pin or piece
of wire to clean the nozzle.
Replace the nozzle if a build up of carbon is present.
With the combustion head removed, loosen the
electrode assembly clamp screw and slide the
electrodes away from the nozzle. Remove the
nozzle using a good fitting spanner (16 mm). The
use of an ill-fitting spanner will damage the nozzle
and could lead to an incorrect flame pattern.
Always check the electrode settings after replacing
the nozzle, see Fig. 22.
4 Photocell - The photocell is a push-fit in the burner
body. Carefully pull out the photocell to clean.
5 Burner fan - With the air intake grille or spigot
removed, remove the screws securing the fan
housing cover (R/H side of burner) and remove the
cover. Inspect the fan and housing and clean as
necessary. Replace the cover.
6 Pump filter - With the burner cover removed,
remove the four screws securing the pump end
cover. Remove the filter and wash in kerosene.
Replace the filter and end cover, ensure the 'O' ring
is in position.
Re-assemble in reverse order.
To ensure safe and efficient operation of the boiler
it is important that re-commissioning is carried out,
especially combustion checks (CO
2
level, flue gas
temperature and smoke number) after the boiler
has been serviced.
Refer to the Commissioning instructions starting on
page 27.