Grant Vortex VTXBH15/26 User Manual

Section 10: CommissioningPage 38
! NOTE !
The distance between the end of the burner head and the
front face of the di󰀨user (D) MUST be correctly set for the
burner to operate correctly.
• Refer to Table 2-2 for the required distance (head
setting) for the boiler output required.
• Check the distance D using the gauge plate supplied
with the boiler.
• To use the gauge plate:
- Position the gauge plate on the burner head as
shown in Figure 10-7.
- Locate the gauge plate with the correct steps
(i.e. the two marked with the required distance D)
resting on the edge of the burner head.
- Check the gauge plate is at 90° to the end of the
burner head and is positioned at the full diameter of
the head.
- If distance D is correct is correct, the tongue of
the gauge plate should just make contact with the
di󰀨user with BOTH steps still in contact with the
edge of the burner head.
- If the steps are not in contact with the edge of the
burner head when the tongue of the gauge plate is
touching the di󰀨user, the di󰀨user must be ‘opened’
(see below).
- If the tongue does not reach the di󰀨user when the
steps are in contact with the edge of the burner
head, the di󰀨user must be ‘closed’ (see below).
• To adjust the di󰀨user position:
- If necessary, adjust distance D using the black
adjustment knob located around the oil supply pipe
on the front of the burner. Refer to item A (Figure
10-7). Re-check distance D using the gauge plate,
as described above.
- For easier access to the adjustment knob, pull the
photocell out from the burner housing.
- To increase distance D (to open the di󰀨user): rotate
the knob clockwise - indicated as ‘+’ on the knob.
- To decrease distance D (to close the di󰀨user):
rotate the knob anti-clockwise - indicated as ‘-’ on
the knob.
! NOTE !
One full rotation of the adjustment knob is approximately
1mm of di󰀨user movement.
! NOTE !
It is essential that the nal position of the di󰀨user is
checked, using the gauge plate provided with the boiler
and the di󰀨user adjusted as necessary to achieve the
required distance D.
12. For Vortex Boilerhouse 15-26 and 26-46 models only:
Check the burner air adjuster disc is correctly set. Refer to
Section 10.4.
10.3 BURNER SETTINGS:
RDB3.2 BURNERS
FOR 46-70 MODELS
With the burner removed from the boiler:
2
5
4
7
6
1
3
Figure 10-8: Riello RDB 3.2 burner head, di󰀨user and nozzle
holder
1. Unscrew and remove the two screws holding the air intake
spigot to the top of the air inlet cover.
2. Remove and discard the air intake spigot and gasket.
3. Fit the slotted air intake (provided loose with the boiler) to the
top of the air intake cover and secure using one of the two
screws previously removed.
4. Remove the burner head. Refer to Figure 10-8. Loosen both
xing screws (3) and remove head from burner (2).
5. Check the nozzle is correct for the required boiler output.
Refer to Table 2-2 for the correct nozzle size and type for the
required boiler output.
6. If the nozzle needs to be replaced - Remove the di󰀨user/
electrode assembly. Refer to Figure 10-8.
• Loosen the di󰀨user clamp screw (7) and remove the
di󰀨user/electrode assembly from the nozzle holder (6).
• Disconnect both ignition leads (4) from the electrodes.
7. Use a 16mm spanner to remove/re-t the nozzle, whilst
holding the nozzle holder using a 17mm 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 OVER TIGHTEN!
8. Reconnect ignition leads to electrodes.
9. Re-t the di󰀨user/electrode assembly to the nozzle holder.
10. Refer to gure 10-8. Slide di󰀨user (5) along the nozzle holder
(6) until hard against the stop and tighten di󰀨user clamp
screw (7).

Grant Vortex VTXBH15/26 Specifications

General

Brand	Grant
Model	Vortex VTXBH15/26
Category	Boiler
Language	English