Grant Vortex Series User Manual

Page 40 Section 11: Servicing
11.4 CLEANING THE BURNER
RDB2.2 BX BURNERS
With the burner removed from the boiler:
Burner head, nozzle and di󰀨user/electrode assembly
1. Remove the burner head. Refer to Figure 10-3. Loosen the
three xing screws (1) and remove head (2) from burner.
2. Clean the combustion head.
3. Remove di󰀨user/electrode assembly. Refer to Figure 10-3.
• Using a 4 mm Allen key, loosen the di󰀨user xing screw
(3) from electrode assembly.
• Lift di󰀨user/electrode assembly (5) up and o󰀨 the nozzle
holder.
• Disconnect both ignition leads (4) from the electrodes.
4. Replace the nozzle (8). The nozzle should always be
replaced on an annual service. Refer to Table 2-2 for the
correct nozzle size and type for the required boiler output. Do
NOT attempt to clean the nozzle.
• Use a 16 mm spanner to remove/re-t the nozzle, whilst
holding the nozzle holder using a 19 mm spanner.
! CAUTION !
The use of an ill-tting spanner will damage the nozzle
and could lead to an incorrect ame pattern and poor
combustion.
! NOTE !
Ensure that the nozzle is securely tightened so that it does
not leak but do not overtighten.
5. Inspect the ignition electrodes - remove the di󰀨user xing
screw and withdraw the electrode assembly. Wipe clean and
check for any cracks in the ceramic insulation. Replace if
necessary.
6. Re-t the di󰀨user/electrode assembly. Refer to Figure 10-3.
• Reconnect ignition leads (4) to electrodes.
• Re-t the di󰀨user/electrode assembly (5) onto the nozzle
holder lining up the xing screw with the recess in the
nozzle holder.
• Ensure di󰀨user assembly is tted down hard onto the
shoulder on the nozzle holder.
• Tighten the xing screw (3) to secure the di󰀨user/
electrode assembly in place on the nozzle holder.
! NOTE !
Do not overtighten the xing screw as this may damage
the electrode insulator.
7. Check/adjust the electrode settings. Refer to Figure 10-4.
Always check the electrode settings after replacing the
nozzle.
8. Re-t the burner head. Refer to Figure 10-3.
• Locate the head xing screws (1) in the countersunk
slots in the burner collar.
• Check that the small oil drip hole (on the head) is
pointing downwards.
• Tighten the three screws (1) to secure the head (2) in
position on the burner.
9. Adjust the di󰀨user position. Refer to Section 11-5.
Photocell
The photocell is a push-t in the front of burner body. Refer to
Section 11.8 (burner components).
1. Holding the body of the photocell (4) and NOT the cable,
carefully pull the photocell out of the burner.
2. Clean the sensor end of the photocell.
3. Replace photocell back in the burner and check that it is fully
pushed in.
Burner air inlet cover
This is located on the right hand side of the burner. Refer to
Section 11.8 (burner components).
1. Unscrew and remove the two screws and remove the air inlet
cover from the burner.
2. Check inside and remove any debris, leaves, hair, u󰀨, etc.
from the air inlet cover and air damper.
3. Check the condition of the rubber seal around the air inlet
cover. Replace if damaged or missing.
Burner fan housing
This is located over the fan impeller. Refer to Section 11.8 (burner
components).
With the Burner air inlet cover already removed:
1. Unscrew and remove the four screws and remove the fan
housing from the burner.
2. Check and clean the fan impeller and remove any debris,
leaves, hair, u󰀨 etc.
3. Check the fan housing is clean and clean as required.
4. Check the rubber seal around the fan housing. Replace if
damaged or missing.
5. Re-t the fan housing to the burner and secure with the four
screws.
6. Check the air adjuster disc (Combi 21 only). Refer to Section
11.6 for details.
7. Re-t the air inlet cover to the burner and secure with the two
screws.
Oil pump lter
This is located under the end cover on the oil pump. Refer to
Section 11.8 (burner components).
1. Unscrew and remove the four cap screws securing the pump
end cover.
2. Remove the lter and wash in kerosene.
3. Check the O-ring seal around the end cover. Replace if
damaged.
4. Replace the lter and end cover.
5. Re-t the four cap screws, tightening evenly, to secure the
end cap.

Grant Vortex Series Specifications

General

Brand	Grant
Model	Vortex Series
Category	Boiler
Language	English