Grant Vortex Eco Series Installation And Servicing Instructions

Page 44
Section 11: Servicing
11.5 ADJUSTING THE DIFFUSER
Adjust the di󰀨user position. Refer to Figure 10-5.
! 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 2-3 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 on the burner head as shown in
Figure 10-5.
- Locate the gauge 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 the distance D is correct, the tongue of the gauge
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 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 Figure 10-5.
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 1
mm 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.
11.6 AIR ADJUSTER DISC:
15/21 AND 21/26 MODELS ONLY
Refer to Section 10.3.
11.7 RECOMMISSIONING
! WARNING !
To ensure safe and e󰀩cient operation of the boiler it is
important that re-commissioning is carried out, especially
combustion checks (%CO
2
level, ue gas temperature and
smoke number) after the boiler has been serviced. Refer to
the Commissioning instructions in Section 10.

Grant Vortex Eco Series Specifications

General

Brand	Grant
Model	Vortex Eco Series
Category	Boiler
Language	English